Formation of stable organometallic planar-tetracoordinate carbon compounds containing a cationic ( μ-R1CCR2)[ μ-chloro(ZrCp2)2] framework

Journal of Organometallic Chemistry

Volumn 518, Issue 1-2, 1996, Pages 221-225

  Röttger, Dirk ^a   Erker, Gerhard ^a   Fröhlich, Roland ^a  

^a UNIVERSITY OF MÜNSTER   (Germany)

Author keywords

Dynamic metallocene complexes; Group 4 metallocene cations; Planar tetracoordinate carbon; Van't hoff le bel compound; Zirconocene

Indexed keywords

EID: 0030581015     PISSN: 0022328X     EISSN: None     Source Type: Journal    
DOI: 10.1016/0022-328X(96)06208-0     Document Type: Article

References (54)

1. [1] G. Erker, Comments Inorg. Chem., 13 (1992) 111; G. Erker, Nachr. Chem. Tech. Lab., 40 (1992) 1099; M. Albrecht, G. Erker and C. Krüger, Synlett., (1993) 441; G. Erker, R. Zwettler, C. Krüger, R. Noe and S. Werner, J. Am. Chem. Soc., 112 (1990) 9620; G. Erker, M. Albrecht, C. Krüger, S. Werner, P. Binger and F. Langhauser, Organometallics, 11 (1992) 3517; G. Erker, M. Albrecht, C. Krüger and S. Werner, J. Am. Chem. Soc., 114 (1992) 8531; G. Erker, M. Albrecht, C. Krüger, M. Nolte and S. Werner, Organometallics, 12 (1993) 4979.
2. [1] G. Erker, Comments Inorg. Chem., 13 (1992) 111; G. Erker, Nachr. Chem. Tech. Lab., 40 (1992) 1099; M. Albrecht, G. Erker and C. Krüger, Synlett., (1993) 441; G. Erker, R. Zwettler, C. Krüger, R. Noe and S. Werner, J. Am. Chem. Soc., 112 (1990) 9620; G. Erker, M. Albrecht, C. Krüger, S. Werner, P. Binger and F. Langhauser, Organometallics, 11 (1992) 3517; G. Erker, M. Albrecht, C. Krüger and S. Werner, J. Am. Chem. Soc., 114 (1992) 8531; G. Erker, M. Albrecht, C. Krüger, M. Nolte and S. Werner, Organometallics, 12 (1993) 4979.
3. [1] G. Erker, Comments Inorg. Chem., 13 (1992) 111; G. Erker, Nachr. Chem. Tech. Lab., 40 (1992) 1099; M. Albrecht, G. Erker and C. Krüger, Synlett., (1993) 441; G. Erker, R. Zwettler, C. Krüger, R. Noe and S. Werner, J. Am. Chem. Soc., 112 (1990) 9620; G. Erker, M. Albrecht, C. Krüger, S. Werner, P. Binger and F. Langhauser, Organometallics, 11 (1992) 3517; G. Erker, M. Albrecht, C. Krüger and S. Werner, J. Am. Chem. Soc., 114 (1992) 8531; G. Erker, M. Albrecht, C. Krüger, M. Nolte and S. Werner, Organometallics, 12 (1993) 4979.
4. [1] G. Erker, Comments Inorg. Chem., 13 (1992) 111; G. Erker, Nachr. Chem. Tech. Lab., 40 (1992) 1099; M. Albrecht, G. Erker and C. Krüger, Synlett., (1993) 441; G. Erker, R. Zwettler, C. Krüger, R. Noe and S. Werner, J. Am. Chem. Soc., 112 (1990) 9620; G. Erker, M. Albrecht, C. Krüger, S. Werner, P. Binger and F. Langhauser, Organometallics, 11 (1992) 3517; G. Erker, M. Albrecht, C. Krüger and S. Werner, J. Am. Chem. Soc., 114 (1992) 8531; G. Erker, M. Albrecht, C. Krüger, M. Nolte and S. Werner, Organometallics, 12 (1993) 4979.
5. [1] G. Erker, Comments Inorg. Chem., 13 (1992) 111; G. Erker, Nachr. Chem. Tech. Lab., 40 (1992) 1099; M. Albrecht, G. Erker and C. Krüger, Synlett., (1993) 441; G. Erker, R. Zwettler, C. Krüger, R. Noe and S. Werner, J. Am. Chem. Soc., 112 (1990) 9620; G. Erker, M. Albrecht, C. Krüger, S. Werner, P. Binger and F. Langhauser, Organometallics, 11 (1992) 3517; G. Erker, M. Albrecht, C. Krüger and S. Werner, J. Am. Chem. Soc., 114 (1992) 8531; G. Erker, M. Albrecht, C. Krüger, M. Nolte and S. Werner, Organometallics, 12 (1993) 4979.
6. [1] G. Erker, Comments Inorg. Chem., 13 (1992) 111; G. Erker, Nachr. Chem. Tech. Lab., 40 (1992) 1099; M. Albrecht, G. Erker and C. Krüger, Synlett., (1993) 441; G. Erker, R. Zwettler, C. Krüger, R. Noe and S. Werner, J. Am. Chem. Soc., 112 (1990) 9620; G. Erker, M. Albrecht, C. Krüger, S. Werner, P. Binger and F. Langhauser, Organometallics, 11 (1992) 3517; G. Erker, M. Albrecht, C. Krüger and S. Werner, J. Am. Chem. Soc., 114 (1992) 8531; G. Erker, M. Albrecht, C. Krüger, M. Nolte and S. Werner, Organometallics, 12 (1993) 4979.
7. [1] G. Erker, Comments Inorg. Chem., 13 (1992) 111; G. Erker, Nachr. Chem. Tech. Lab., 40 (1992) 1099; M. Albrecht, G. Erker and C. Krüger, Synlett., (1993) 441; G. Erker, R. Zwettler, C. Krüger, R. Noe and S. Werner, J. Am. Chem. Soc., 112 (1990) 9620; G. Erker, M. Albrecht, C. Krüger, S. Werner, P. Binger and F. Langhauser, Organometallics, 11 (1992) 3517; G. Erker, M. Albrecht, C. Krüger and S. Werner, J. Am. Chem. Soc., 114 (1992) 8531; G. Erker, M. Albrecht, C. Krüger, M. Nolte and S. Werner, Organometallics, 12 (1993) 4979.
8. [2] P. Binger, F. Sandmeyer and C. Krüger, Organometallics, 14 (1995) 2969; P. Binger, F. Sandmeyer, C. Krüger, J. Kuhnigk, R. Goddard and G. Erker, Angew. Chem., 106 (1994) 213; Angew. Chem. Int. Ed. Engl., 33 (1994) 197; P. Binger, F. Sandmeyer, C. Krüger and G. Erker, Tetrahedron, 51 (1995) 4277.
9. [2] P. Binger, F. Sandmeyer and C. Krüger, Organometallics, 14 (1995) 2969; P. Binger, F. Sandmeyer, C. Krüger, J. Kuhnigk, R. Goddard and G. Erker, Angew. Chem., 106 (1994) 213; Angew. Chem. Int. Ed. Engl., 33 (1994) 197; P. Binger, F. Sandmeyer, C. Krüger and G. Erker, Tetrahedron, 51 (1995) 4277.
10. [2] P. Binger, F. Sandmeyer and C. Krüger, Organometallics, 14 (1995) 2969; P. Binger, F. Sandmeyer, C. Krüger, J. Kuhnigk, R. Goddard and G. Erker, Angew. Chem., 106 (1994) 213; Angew. Chem. Int. Ed. Engl., 33 (1994) 197; P. Binger, F. Sandmeyer, C. Krüger and G. Erker, Tetrahedron, 51 (1995) 4277.
11. [2] P. Binger, F. Sandmeyer and C. Krüger, Organometallics, 14 (1995) 2969; P. Binger, F. Sandmeyer, C. Krüger, J. Kuhnigk, R. Goddard and G. Erker, Angew. Chem., 106 (1994) 213; Angew. Chem. Int. Ed. Engl., 33 (1994) 197; P. Binger, F. Sandmeyer, C. Krüger and G. Erker, Tetrahedron, 51 (1995) 4277.
12. [3] G. Erker and D. Röttger, Angew. Chem., 105 (1993) 1691; Angew. Chem., Int. Ed. Engl., 32 (1993) 1623; D. Röttger, G. Erker, R. Fröhlich and S. Kotila, Chem. Ber., 129 (1996) 1.
13. [3] G. Erker and D. Röttger, Angew. Chem., 105 (1993) 1691; Angew. Chem., Int. Ed. Engl., 32 (1993) 1623; D. Röttger, G. Erker, R. Fröhlich and S. Kotila, Chem. Ber., 129 (1996) 1.
14. [3] G. Erker and D. Röttger, Angew. Chem., 105 (1993) 1691; Angew. Chem., Int. Ed. Engl., 32 (1993) 1623; D. Röttger, G. Erker, R. Fröhlich and S. Kotila, Chem. Ber., 129 (1996) 1.
15. [4] A.D. Horton and A.G. Orpen, Angew. Chem., 104 (1992) 912; Angew. Chem., Int. Ed. Engl., 31 (1992) 876.
16. [4] A.D. Horton and A.G. Orpen, Angew. Chem., 104 (1992) 912; Angew. Chem., Int. Ed. Engl., 31 (1992) 876.
17. [5] D. Röttger, G. Erker, R. Fröhlich, M. Grehl, S.J. Silverio, I. Hyla-Kryspin and R. Gleiter, J. Am. Chem. Soc., 117 (1995) 10503.
18. [6] G. Erker, W. Frömberg, R. Benn, R. Mynott, K. Angermund and C. Krüger, Organometallics, 8 (1989) 911; G. Erker, W. Frömberg, R. Mynott, B. Gabor and C. Krüger, Angew. Chem., 98 (1986) 456; Angew. Chem., Int. Ed. Engl., 25 (1986) 463.
19. [6] G. Erker, W. Frömberg, R. Benn, R. Mynott, K. Angermund and C. Krüger, Organometallics, 8 (1989) 911; G. Erker, W. Frömberg, R. Mynott, B. Gabor and C. Krüger, Angew. Chem., 98 (1986) 456; Angew. Chem., Int. Ed. Engl., 25 (1986) 463.
20. [6] G. Erker, W. Frömberg, R. Benn, R. Mynott, K. Angermund and C. Krüger, Organometallics, 8 (1989) 911; G. Erker, W. Frömberg, R. Mynott, B. Gabor and C. Krüger, Angew. Chem., 98 (1986) 456; Angew. Chem., Int. Ed. Engl., 25 (1986) 463.
21. [7] R.F. Jordan, Adv. Organomet. Chem., 32 (1991) 325 and references cited therein.
22. [8] G. Erker and D. Röttger, unpublished results.
23. [9] D. Röttger, G. Erker, R. Fröhlich and S. Kotila, Chem. Ber., 129 (1996) 5.
24. [10] For a discussion of general aspects of planar-tetracoordinate carbon stabilization see e.g.: R. Hoffmann, R.W. Alder and C.F. Wilcox, Jr., J. Am. Chem. Soc., 92 (1970) 4992; R. Hoffmann, Pure Appl. Chem., 28 (1971) 181; P.v.R. Schleyer and A.I. Boldyrev, J. Chem. Soc., Chem. Commun., (1991) 1536; K. Krogh-Jespersen, D. Cremer, D. Poppinger, J.A. Pople, P.v.R. Schleyer and J. Chandrasekhar, J. Am. Chem. Soc., 101 (1979) 4843; K. Sorger and P.v.R. Schleyer, J. Mol. Struct. Theochem., 338 (1995) 317; R. Gleiter, I. Hyla-Kryspin, S. Niu and G. Erker, Angew. Chem., 105 (1993) 753; Angew. Chem., Int. Ed. Engl., 32 (1993) 754; R. Keese, A. Pfenninger and A. Roesle, Helv. Chim. Acta, 62 (1979) 326; R. Keese, Nachr. Chem. Tech. Lab., 30 (1980) 844; J.E. Lyons, D.R. Rasmussen, M.P. McGrath, R.H. Nobes and L. Radom, Angew. Chem., 106 (1994) 1722; Angew. Chem., Int. Ed. Engl., 33 (1994) 1667.
25. [10] For a discussion of general aspects of planar-tetracoordinate carbon stabilization see e.g.: R. Hoffmann, R.W. Alder and C.F. Wilcox, Jr., J. Am. Chem. Soc., 92 (1970) 4992; R. Hoffmann, Pure Appl. Chem., 28 (1971) 181; P.v.R. Schleyer and A.I. Boldyrev, J. Chem. Soc., Chem. Commun., (1991) 1536; K. Krogh-Jespersen, D. Cremer, D. Poppinger, J.A. Pople, P.v.R. Schleyer and J. Chandrasekhar, J. Am. Chem. Soc., 101 (1979) 4843; K. Sorger and P.v.R. Schleyer, J. Mol. Struct. Theochem., 338 (1995) 317; R. Gleiter, I. Hyla-Kryspin, S. Niu and G. Erker, Angew. Chem., 105 (1993) 753; Angew. Chem., Int. Ed. Engl., 32 (1993) 754; R. Keese, A. Pfenninger and A. Roesle, Helv. Chim. Acta, 62 (1979) 326; R. Keese, Nachr. Chem. Tech. Lab., 30 (1980) 844; J.E. Lyons, D.R. Rasmussen, M.P. McGrath, R.H. Nobes and L. Radom, Angew. Chem., 106 (1994) 1722; Angew. Chem., Int. Ed. Engl., 33 (1994) 1667.
26. [10] For a discussion of general aspects of planar-tetracoordinate carbon stabilization see e.g.: R. Hoffmann, R.W. Alder and C.F. Wilcox, Jr., J. Am. Chem. Soc., 92 (1970) 4992; R. Hoffmann, Pure Appl. Chem., 28 (1971) 181; P.v.R. Schleyer and A.I. Boldyrev, J. Chem. Soc., Chem. Commun., (1991) 1536; K. Krogh-Jespersen, D. Cremer, D. Poppinger, J.A. Pople, P.v.R. Schleyer and J. Chandrasekhar, J. Am. Chem. Soc., 101 (1979) 4843; K. Sorger and P.v.R. Schleyer, J. Mol. Struct. Theochem., 338 (1995) 317; R. Gleiter, I. Hyla-Kryspin, S. Niu and G. Erker, Angew. Chem., 105 (1993) 753; Angew. Chem., Int. Ed. Engl., 32 (1993) 754; R. Keese, A. Pfenninger and A. Roesle, Helv. Chim. Acta, 62 (1979) 326; R. Keese, Nachr. Chem. Tech. Lab., 30 (1980) 844; J.E. Lyons, D.R. Rasmussen, M.P. McGrath, R.H. Nobes and L. Radom, Angew. Chem., 106 (1994) 1722; Angew. Chem., Int. Ed. Engl., 33 (1994) 1667.
27. [10] For a discussion of general aspects of planar-tetracoordinate carbon stabilization see e.g.: R. Hoffmann, R.W. Alder and C.F. Wilcox, Jr., J. Am. Chem. Soc., 92 (1970) 4992; R. Hoffmann, Pure Appl. Chem., 28 (1971) 181; P.v.R. Schleyer and A.I. Boldyrev, J. Chem. Soc., Chem. Commun., (1991) 1536; K. Krogh-Jespersen, D. Cremer, D. Poppinger, J.A. Pople, P.v.R. Schleyer and J. Chandrasekhar, J. Am. Chem. Soc., 101 (1979) 4843; K. Sorger and P.v.R. Schleyer, J. Mol. Struct. Theochem., 338 (1995) 317; R. Gleiter, I. Hyla-Kryspin, S. Niu and G. Erker, Angew. Chem., 105 (1993) 753; Angew. Chem., Int. Ed. Engl., 32 (1993) 754; R. Keese, A. Pfenninger and A. Roesle, Helv. Chim. Acta, 62 (1979) 326; R. Keese, Nachr. Chem. Tech. Lab., 30 (1980) 844; J.E. Lyons, D.R. Rasmussen, M.P. McGrath, R.H. Nobes and L. Radom, Angew. Chem., 106 (1994) 1722; Angew. Chem., Int. Ed. Engl., 33 (1994) 1667.
28. [10] For a discussion of general aspects of planar-tetracoordinate carbon stabilization see e.g.: R. Hoffmann, R.W. Alder and C.F. Wilcox, Jr., J. Am. Chem. Soc., 92 (1970) 4992; R. Hoffmann, Pure Appl. Chem., 28 (1971) 181; P.v.R. Schleyer and A.I. Boldyrev, J. Chem. Soc., Chem. Commun., (1991) 1536; K. Krogh-Jespersen, D. Cremer, D. Poppinger, J.A. Pople, P.v.R. Schleyer and J. Chandrasekhar, J. Am. Chem. Soc., 101 (1979) 4843; K. Sorger and P.v.R. Schleyer, J. Mol. Struct. Theochem., 338 (1995) 317; R. Gleiter, I. Hyla-Kryspin, S. Niu and G. Erker, Angew. Chem., 105 (1993) 753; Angew. Chem., Int. Ed. Engl., 32 (1993) 754; R. Keese, A. Pfenninger and A. Roesle, Helv. Chim. Acta, 62 (1979) 326; R. Keese, Nachr. Chem. Tech. Lab., 30 (1980) 844; J.E. Lyons, D.R. Rasmussen, M.P. McGrath, R.H. Nobes and L. Radom, Angew. Chem., 106 (1994) 1722; Angew. Chem., Int. Ed. Engl., 33 (1994) 1667.
29. [10] For a discussion of general aspects of planar-tetracoordinate carbon stabilization see e.g.: R. Hoffmann, R.W. Alder and C.F. Wilcox, Jr., J. Am. Chem. Soc., 92 (1970) 4992; R. Hoffmann, Pure Appl. Chem., 28 (1971) 181; P.v.R. Schleyer and A.I. Boldyrev, J. Chem. Soc., Chem. Commun., (1991) 1536; K. Krogh-Jespersen, D. Cremer, D. Poppinger, J.A. Pople, P.v.R. Schleyer and J. Chandrasekhar, J. Am. Chem. Soc., 101 (1979) 4843; K. Sorger and P.v.R. Schleyer, J. Mol. Struct. Theochem., 338 (1995) 317; R. Gleiter, I. Hyla-Kryspin, S. Niu and G. Erker, Angew. Chem., 105 (1993) 753; Angew. Chem., Int. Ed. Engl., 32 (1993) 754; R. Keese, A. Pfenninger and A. Roesle, Helv. Chim. Acta, 62 (1979) 326; R. Keese, Nachr. Chem. Tech. Lab., 30 (1980) 844; J.E. Lyons, D.R. Rasmussen, M.P. McGrath, R.H. Nobes and L. Radom, Angew. Chem., 106 (1994) 1722; Angew. Chem., Int. Ed. Engl., 33 (1994) 1667.
30. [10] For a discussion of general aspects of planar-tetracoordinate carbon stabilization see e.g.: R. Hoffmann, R.W. Alder and C.F. Wilcox, Jr., J. Am. Chem. Soc., 92 (1970) 4992; R. Hoffmann, Pure Appl. Chem., 28 (1971) 181; P.v.R. Schleyer and A.I. Boldyrev, J. Chem. Soc., Chem. Commun., (1991) 1536; K. Krogh-Jespersen, D. Cremer, D. Poppinger, J.A. Pople, P.v.R. Schleyer and J. Chandrasekhar, J. Am. Chem. Soc., 101 (1979) 4843; K. Sorger and P.v.R. Schleyer, J. Mol. Struct. Theochem., 338 (1995) 317; R. Gleiter, I. Hyla-Kryspin, S. Niu and G. Erker, Angew. Chem., 105 (1993) 753; Angew. Chem., Int. Ed. Engl., 32 (1993) 754; R. Keese, A. Pfenninger and A. Roesle, Helv. Chim. Acta, 62 (1979) 326; R. Keese, Nachr. Chem. Tech. Lab., 30 (1980) 844; J.E. Lyons, D.R. Rasmussen, M.P. McGrath, R.H. Nobes and L. Radom, Angew. Chem., 106 (1994) 1722; Angew. Chem., Int. Ed. Engl., 33 (1994) 1667.
31. [10] For a discussion of general aspects of planar-tetracoordinate carbon stabilization see e.g.: R. Hoffmann, R.W. Alder and C.F. Wilcox, Jr., J. Am. Chem. Soc., 92 (1970) 4992; R. Hoffmann, Pure Appl. Chem., 28 (1971) 181; P.v.R. Schleyer and A.I. Boldyrev, J. Chem. Soc., Chem. Commun., (1991) 1536; K. Krogh-Jespersen, D. Cremer, D. Poppinger, J.A. Pople, P.v.R. Schleyer and J. Chandrasekhar, J. Am. Chem. Soc., 101 (1979) 4843; K. Sorger and P.v.R. Schleyer, J. Mol. Struct. Theochem., 338 (1995) 317; R. Gleiter, I. Hyla-Kryspin, S. Niu and G. Erker, Angew. Chem., 105 (1993) 753; Angew. Chem., Int. Ed. Engl., 32 (1993) 754; R. Keese, A. Pfenninger and A. Roesle, Helv. Chim. Acta, 62 (1979) 326; R. Keese, Nachr. Chem. Tech. Lab., 30 (1980) 844; J.E. Lyons, D.R. Rasmussen, M.P. McGrath, R.H. Nobes and L. Radom, Angew. Chem., 106 (1994) 1722; Angew. Chem., Int. Ed. Engl., 33 (1994) 1667.
32. [10] For a discussion of general aspects of planar-tetracoordinate carbon stabilization see e.g.: R. Hoffmann, R.W. Alder and C.F. Wilcox, Jr., J. Am. Chem. Soc., 92 (1970) 4992; R. Hoffmann, Pure Appl. Chem., 28 (1971) 181; P.v.R. Schleyer and A.I. Boldyrev, J. Chem. Soc., Chem. Commun., (1991) 1536; K. Krogh-Jespersen, D. Cremer, D. Poppinger, J.A. Pople, P.v.R. Schleyer and J. Chandrasekhar, J. Am. Chem. Soc., 101 (1979) 4843; K. Sorger and P.v.R. Schleyer, J. Mol. Struct. Theochem., 338 (1995) 317; R. Gleiter, I. Hyla-Kryspin, S. Niu and G. Erker, Angew. Chem., 105 (1993) 753; Angew. Chem., Int. Ed. Engl., 32 (1993) 754; R. Keese, A. Pfenninger and A. Roesle, Helv. Chim. Acta, 62 (1979) 326; R. Keese, Nachr. Chem. Tech. Lab., 30 (1980) 844; J.E. Lyons, D.R. Rasmussen, M.P. McGrath, R.H. Nobes and L. Radom, Angew. Chem., 106 (1994) 1722; Angew. Chem., Int. Ed. Engl., 33 (1994) 1667.
33. [10] For a discussion of general aspects of planar-tetracoordinate carbon stabilization see e.g.: R. Hoffmann, R.W. Alder and C.F. Wilcox, Jr., J. Am. Chem. Soc., 92 (1970) 4992; R. Hoffmann, Pure Appl. Chem., 28 (1971) 181; P.v.R. Schleyer and A.I. Boldyrev, J. Chem. Soc., Chem. Commun., (1991) 1536; K. Krogh-Jespersen, D. Cremer, D. Poppinger, J.A. Pople, P.v.R. Schleyer and J. Chandrasekhar, J. Am. Chem. Soc., 101 (1979) 4843; K. Sorger and P.v.R. Schleyer, J. Mol. Struct. Theochem., 338 (1995) 317; R. Gleiter, I. Hyla-Kryspin, S. Niu and G. Erker, Angew. Chem., 105 (1993) 753; Angew. Chem., Int. Ed. Engl., 32 (1993) 754; R. Keese, A. Pfenninger and A. Roesle, Helv. Chim. Acta, 62 (1979) 326; R. Keese, Nachr. Chem. Tech. Lab., 30 (1980) 844; J.E. Lyons, D.R. Rasmussen, M.P. McGrath, R.H. Nobes and L. Radom, Angew. Chem., 106 (1994) 1722; Angew. Chem., Int. Ed. Engl., 33 (1994) 1667.
34. [10] For a discussion of general aspects of planar-tetracoordinate carbon stabilization see e.g.: R. Hoffmann, R.W. Alder and C.F. Wilcox, Jr., J. Am. Chem. Soc., 92 (1970) 4992; R. Hoffmann, Pure Appl. Chem., 28 (1971) 181; P.v.R. Schleyer and A.I. Boldyrev, J. Chem. Soc., Chem. Commun., (1991) 1536; K. Krogh-Jespersen, D. Cremer, D. Poppinger, J.A. Pople, P.v.R. Schleyer and J. Chandrasekhar, J. Am. Chem. Soc., 101 (1979) 4843; K. Sorger and P.v.R. Schleyer, J. Mol. Struct. Theochem., 338 (1995) 317; R. Gleiter, I. Hyla-Kryspin, S. Niu and G. Erker, Angew. Chem., 105 (1993) 753; Angew. Chem., Int. Ed. Engl., 32 (1993) 754; R. Keese, A. Pfenninger and A. Roesle, Helv. Chim. Acta, 62 (1979) 326; R. Keese, Nachr. Chem. Tech. Lab., 30 (1980) 844; J.E. Lyons, D.R. Rasmussen, M.P. McGrath, R.H. Nobes and L. Radom, Angew. Chem., 106 (1994) 1722; Angew. Chem., Int. Ed. Engl., 33 (1994) 1667.
35. [11] H.S. Gutowsky and C.H. Holm, J. Chem. Phys., 25 (1956) 1228; A. Allerhand, H.S. Gutowsky, J. Jonas and R.A. Meinzer, J. Am. Chem. Soc., 88 (1966) 3185; M.L.H. Green, L.-L. Wong and A. Sella, Organometallics, 11 (1992) 2660.
36. [11] H.S. Gutowsky and C.H. Holm, J. Chem. Phys., 25 (1956) 1228; A. Allerhand, H.S. Gutowsky, J. Jonas and R.A. Meinzer, J. Am. Chem. Soc., 88 (1966) 3185; M.L.H. Green, L.-L. Wong and A. Sella, Organometallics, 11 (1992) 2660.
37. [11] H.S. Gutowsky and C.H. Holm, J. Chem. Phys., 25 (1956) 1228; A. Allerhand, H.S. Gutowsky, J. Jonas and R.A. Meinzer, J. Am. Chem. Soc., 88 (1966) 3185; M.L.H. Green, L.-L. Wong and A. Sella, Organometallics, 11 (1992) 2660.
38. [12] For other recently disclosed examples of "anti-van't Hoff/Le-Bel compounds" see e.g.: R.H. Cayton, S.T. Chacon, M.H. Chisholm, M.J. Hampden-Smith, J.C. Huffman, K. Folting, P.D. Ellis and B.A. Huggins, Angew. Chem., 101 (1989) 1547; Angew. Chem., Int. Ed. Engl., 28 (1989) 1523; S.T. Chacon, M.H. Chisholm, K. Folting, J.C. Huffman and M.J. Hampden-Smith, Organometallics, 10 (1991) 3722; F.A. Cotton and E.S. Shamshoum, J. Am. Chem. Soc., 107 (1985) 4662; F.A. Cotton and E.S. Shamshoum, Polyhedron, 4 (1985) 1727; F.A. Cotton, W. Schwotzer and E.S. Shamshoum, Organometallics, 4 (1985) 461; P. Leoni, M. Pasquali, G. Pieri, A. Albinati, P.S. Pregosin and H. Rüegger, Organometallics, 14 (1995) 3145; H. Dietrich, W. Mahdi and W. Storck, J. Organomet. Chem., 349 (1988) 1; S. Harder, J. Boersma, L. Brandsma, A. van Heteren, J.A. Kanters, W. Bauer and P.v.R. Schleyer, J. Am. Chem. Soc., 110 (1988) 7802; F.A. Cotton and M. Millar, J. Am. Chem. Soc., 99 (1977) 7886; F.A. Cotton, G.E. Lewis, G.N. Graham and N. Mott, Inorg. Chem., 22 (1983) 560; S.L. Buchwald, E.A. Lucas and W.M. Davis, J. Am. Chem. Soc., 111 (1989) 397; W.J. Evans, T.P. Hanusa, J.H. Meadows, W.E. Hunter and J.L. Atwood, Organometallics, 6 (1987) 295; M. Menzel, D. Steiner, H.J. Winkler, D. Schwikart, S. Mehle, S. Fau, G. Frenking, W. Massa and A. Berndt, Angew. Chem., 107 (1995) 368; Angew. Chem., Int. Ed. Engl., 34 (1995) 327; A. Gunale, H. Pritzkow, W. Siebert, D. Steiner and A. Berndt, Angew. Chem., 107 (1995) 1194; Angew. Chem., Int. Ed. Engl., 34 (1995) 1111.
39. [12] For other recently disclosed examples of "anti-van't Hoff/Le-Bel compounds" see e.g.: R.H. Cayton, S.T. Chacon, M.H. Chisholm, M.J. Hampden-Smith, J.C. Huffman, K. Folting, P.D. Ellis and B.A. Huggins, Angew. Chem., 101 (1989) 1547; Angew. Chem., Int. Ed. Engl., 28 (1989) 1523; S.T. Chacon, M.H. Chisholm, K. Folting, J.C. Huffman and M.J. Hampden-Smith, Organometallics, 10 (1991) 3722; F.A. Cotton and E.S. Shamshoum, J. Am. Chem. Soc., 107 (1985) 4662; F.A. Cotton and E.S. Shamshoum, Polyhedron, 4 (1985) 1727; F.A. Cotton, W. Schwotzer and E.S. Shamshoum, Organometallics, 4 (1985) 461; P. Leoni, M. Pasquali, G. Pieri, A. Albinati, P.S. Pregosin and H. Rüegger, Organometallics, 14 (1995) 3145; H. Dietrich, W. Mahdi and W. Storck, J. Organomet. Chem., 349 (1988) 1; S. Harder, J. Boersma, L. Brandsma, A. van Heteren, J.A. Kanters, W. Bauer and P.v.R. Schleyer, J. Am. Chem. Soc., 110 (1988) 7802; F.A. Cotton and M. Millar, J. Am. Chem. Soc., 99 (1977) 7886; F.A. Cotton, G.E. Lewis, G.N. Graham and N. Mott, Inorg. Chem., 22 (1983) 560; S.L. Buchwald, E.A. Lucas and W.M. Davis, J. Am. Chem. Soc., 111 (1989) 397; W.J. Evans, T.P. Hanusa, J.H. Meadows, W.E. Hunter and J.L. Atwood, Organometallics, 6 (1987) 295; M. Menzel, D. Steiner, H.J. Winkler, D. Schwikart, S. Mehle, S. Fau, G. Frenking, W. Massa and A. Berndt, Angew. Chem., 107 (1995) 368; Angew. Chem., Int. Ed. Engl., 34 (1995) 327; A. Gunale, H. Pritzkow, W. Siebert, D. Steiner and A. Berndt, Angew. Chem., 107 (1995) 1194; Angew. Chem., Int. Ed. Engl., 34 (1995) 1111.
40. [12] For other recently disclosed examples of "anti-van't Hoff/Le-Bel compounds" see e.g.: R.H. Cayton, S.T. Chacon, M.H. Chisholm, M.J. Hampden-Smith, J.C. Huffman, K. Folting, P.D. Ellis and B.A. Huggins, Angew. Chem., 101 (1989) 1547; Angew. Chem., Int. Ed. Engl., 28 (1989) 1523; S.T. Chacon, M.H. Chisholm, K. Folting, J.C. Huffman and M.J. Hampden-Smith, Organometallics, 10 (1991) 3722; F.A. Cotton and E.S. Shamshoum, J. Am. Chem. Soc., 107 (1985) 4662; F.A. Cotton and E.S. Shamshoum, Polyhedron, 4 (1985) 1727; F.A. Cotton, W. Schwotzer and E.S. Shamshoum, Organometallics, 4 (1985) 461; P. Leoni, M. Pasquali, G. Pieri, A. Albinati, P.S. Pregosin and H. Rüegger, Organometallics, 14 (1995) 3145; H. Dietrich, W. Mahdi and W. Storck, J. Organomet. Chem., 349 (1988) 1; S. Harder, J. Boersma, L. Brandsma, A. van Heteren, J.A. Kanters, W. Bauer and P.v.R. Schleyer, J. Am. Chem. Soc., 110 (1988) 7802; F.A. Cotton and M. Millar, J. Am. Chem. Soc., 99 (1977) 7886; F.A. Cotton, G.E. Lewis, G.N. Graham and N. Mott, Inorg. Chem., 22 (1983) 560; S.L. Buchwald, E.A. Lucas and W.M. Davis, J. Am. Chem. Soc., 111 (1989) 397; W.J. Evans, T.P. Hanusa, J.H. Meadows, W.E. Hunter and J.L. Atwood, Organometallics, 6 (1987) 295; M. Menzel, D. Steiner, H.J. Winkler, D. Schwikart, S. Mehle, S. Fau, G. Frenking, W. Massa and A. Berndt, Angew. Chem., 107 (1995) 368; Angew. Chem., Int. Ed. Engl., 34 (1995) 327; A. Gunale, H. Pritzkow, W. Siebert, D. Steiner and A. Berndt, Angew. Chem., 107 (1995) 1194; Angew. Chem., Int. Ed. Engl., 34 (1995) 1111.
41. [12] For other recently disclosed examples of "anti-van't Hoff/Le-Bel compounds" see e.g.: R.H. Cayton, S.T. Chacon, M.H. Chisholm, M.J. Hampden-Smith, J.C. Huffman, K. Folting, P.D. Ellis and B.A. Huggins, Angew. Chem., 101 (1989) 1547; Angew. Chem., Int. Ed. Engl., 28 (1989) 1523; S.T. Chacon, M.H. Chisholm, K. Folting, J.C. Huffman and M.J. Hampden-Smith, Organometallics, 10 (1991) 3722; F.A. Cotton and E.S. Shamshoum, J. Am. Chem. Soc., 107 (1985) 4662; F.A. Cotton and E.S. Shamshoum, Polyhedron, 4 (1985) 1727; F.A. Cotton, W. Schwotzer and E.S. Shamshoum, Organometallics, 4 (1985) 461; P. Leoni, M. Pasquali, G. Pieri, A. Albinati, P.S. Pregosin and H. Rüegger, Organometallics, 14 (1995) 3145; H. Dietrich, W. Mahdi and W. Storck, J. Organomet. Chem., 349 (1988) 1; S. Harder, J. Boersma, L. Brandsma, A. van Heteren, J.A. Kanters, W. Bauer and P.v.R. Schleyer, J. Am. Chem. Soc., 110 (1988) 7802; F.A. Cotton and M. Millar, J. Am. Chem. Soc., 99 (1977) 7886; F.A. Cotton, G.E. Lewis, G.N. Graham and N. Mott, Inorg. Chem., 22 (1983) 560; S.L. Buchwald, E.A. Lucas and W.M. Davis, J. Am. Chem. Soc., 111 (1989) 397; W.J. Evans, T.P. Hanusa, J.H. Meadows, W.E. Hunter and J.L. Atwood, Organometallics, 6 (1987) 295; M. Menzel, D. Steiner, H.J. Winkler, D. Schwikart, S. Mehle, S. Fau, G. Frenking, W. Massa and A. Berndt, Angew. Chem., 107 (1995) 368; Angew. Chem., Int. Ed. Engl., 34 (1995) 327; A. Gunale, H. Pritzkow, W. Siebert, D. Steiner and A. Berndt, Angew. Chem., 107 (1995) 1194; Angew. Chem., Int. Ed. Engl., 34 (1995) 1111.
42. [12] For other recently disclosed examples of "anti-van't Hoff/Le-Bel compounds" see e.g.: R.H. Cayton, S.T. Chacon, M.H. Chisholm, M.J. Hampden-Smith, J.C. Huffman, K. Folting, P.D. Ellis and B.A. Huggins, Angew. Chem., 101 (1989) 1547; Angew. Chem., Int. Ed. Engl., 28 (1989) 1523; S.T. Chacon, M.H. Chisholm, K. Folting, J.C. Huffman and M.J. Hampden-Smith, Organometallics, 10 (1991) 3722; F.A. Cotton and E.S. Shamshoum, J. Am. Chem. Soc., 107 (1985) 4662; F.A. Cotton and E.S. Shamshoum, Polyhedron, 4 (1985) 1727; F.A. Cotton, W. Schwotzer and E.S. Shamshoum, Organometallics, 4 (1985) 461; P. Leoni, M. Pasquali, G. Pieri, A. Albinati, P.S. Pregosin and H. Rüegger, Organometallics, 14 (1995) 3145; H. Dietrich, W. Mahdi and W. Storck, J. Organomet. Chem., 349 (1988) 1; S. Harder, J. Boersma, L. Brandsma, A. van Heteren, J.A. Kanters, W. Bauer and P.v.R. Schleyer, J. Am. Chem. Soc., 110 (1988) 7802; F.A. Cotton and M. Millar, J. Am. Chem. Soc., 99 (1977) 7886; F.A. Cotton, G.E. Lewis, G.N. Graham and N. Mott, Inorg. Chem., 22 (1983) 560; S.L. Buchwald, E.A. Lucas and W.M. Davis, J. Am. Chem. Soc., 111 (1989) 397; W.J. Evans, T.P. Hanusa, J.H. Meadows, W.E. Hunter and J.L. Atwood, Organometallics, 6 (1987) 295; M. Menzel, D. Steiner, H.J. Winkler, D. Schwikart, S. Mehle, S. Fau, G. Frenking, W. Massa and A. Berndt, Angew. Chem., 107 (1995) 368; Angew. Chem., Int. Ed. Engl., 34 (1995) 327; A. Gunale, H. Pritzkow, W. Siebert, D. Steiner and A. Berndt, Angew. Chem., 107 (1995) 1194; Angew. Chem., Int. Ed. Engl., 34 (1995) 1111.
43. [12] For other recently disclosed examples of "anti-van't Hoff/Le-Bel compounds" see e.g.: R.H. Cayton, S.T. Chacon, M.H. Chisholm, M.J. Hampden-Smith, J.C. Huffman, K. Folting, P.D. Ellis and B.A. Huggins, Angew. Chem., 101 (1989) 1547; Angew. Chem., Int. Ed. Engl., 28 (1989) 1523; S.T. Chacon, M.H. Chisholm, K. Folting, J.C. Huffman and M.J. Hampden-Smith, Organometallics, 10 (1991) 3722; F.A. Cotton and E.S. Shamshoum, J. Am. Chem. Soc., 107 (1985) 4662; F.A. Cotton and E.S. Shamshoum, Polyhedron, 4 (1985) 1727; F.A. Cotton, W. Schwotzer and E.S. Shamshoum, Organometallics, 4 (1985) 461; P. Leoni, M. Pasquali, G. Pieri, A. Albinati, P.S. Pregosin and H. Rüegger, Organometallics, 14 (1995) 3145; H. Dietrich, W. Mahdi and W. Storck, J. Organomet. Chem., 349 (1988) 1; S. Harder, J. Boersma, L. Brandsma, A. van Heteren, J.A. Kanters, W. Bauer and P.v.R. Schleyer, J. Am. Chem. Soc., 110 (1988) 7802; F.A. Cotton and M. Millar, J. Am. Chem. Soc., 99 (1977) 7886; F.A. Cotton, G.E. Lewis, G.N. Graham and N. Mott, Inorg. Chem., 22 (1983) 560; S.L. Buchwald, E.A. Lucas and W.M. Davis, J. Am. Chem. Soc., 111 (1989) 397; W.J. Evans, T.P. Hanusa, J.H. Meadows, W.E. Hunter and J.L. Atwood, Organometallics, 6 (1987) 295; M. Menzel, D. Steiner, H.J. Winkler, D. Schwikart, S. Mehle, S. Fau, G. Frenking, W. Massa and A. Berndt, Angew. Chem., 107 (1995) 368; Angew. Chem., Int. Ed. Engl., 34 (1995) 327; A. Gunale, H. Pritzkow, W. Siebert, D. Steiner and A. Berndt, Angew. Chem., 107 (1995) 1194; Angew. Chem., Int. Ed. Engl., 34 (1995) 1111.
44. [12] For other recently disclosed examples of "anti-van't Hoff/Le-Bel compounds" see e.g.: R.H. Cayton, S.T. Chacon, M.H. Chisholm, M.J. Hampden-Smith, J.C. Huffman, K. Folting, P.D. Ellis and B.A. Huggins, Angew. Chem., 101 (1989) 1547; Angew. Chem., Int. Ed. Engl., 28 (1989) 1523; S.T. Chacon, M.H. Chisholm, K. Folting, J.C. Huffman and M.J. Hampden-Smith, Organometallics, 10 (1991) 3722; F.A. Cotton and E.S. Shamshoum, J. Am. Chem. Soc., 107 (1985) 4662; F.A. Cotton and E.S. Shamshoum, Polyhedron, 4 (1985) 1727; F.A. Cotton, W. Schwotzer and E.S. Shamshoum, Organometallics, 4 (1985) 461; P. Leoni, M. Pasquali, G. Pieri, A. Albinati, P.S. Pregosin and H. Rüegger, Organometallics, 14 (1995) 3145; H. Dietrich, W. Mahdi and W. Storck, J. Organomet. Chem., 349 (1988) 1; S. Harder, J. Boersma, L. Brandsma, A. van Heteren, J.A. Kanters, W. Bauer and P.v.R. Schleyer, J. Am. Chem. Soc., 110 (1988) 7802; F.A. Cotton and M. Millar, J. Am. Chem. Soc., 99 (1977) 7886; F.A. Cotton, G.E. Lewis, G.N. Graham and N. Mott, Inorg. Chem., 22 (1983) 560; S.L. Buchwald, E.A. Lucas and W.M. Davis, J. Am. Chem. Soc., 111 (1989) 397; W.J. Evans, T.P. Hanusa, J.H. Meadows, W.E. Hunter and J.L. Atwood, Organometallics, 6 (1987) 295; M. Menzel, D. Steiner, H.J. Winkler, D. Schwikart, S. Mehle, S. Fau, G. Frenking, W. Massa and A. Berndt, Angew. Chem., 107 (1995) 368; Angew. Chem., Int. Ed. Engl., 34 (1995) 327; A. Gunale, H. Pritzkow, W. Siebert, D. Steiner and A. Berndt, Angew. Chem., 107 (1995) 1194; Angew. Chem., Int. Ed. Engl., 34 (1995) 1111.
45. [12] For other recently disclosed examples of "anti-van't Hoff/Le-Bel compounds" see e.g.: R.H. Cayton, S.T. Chacon, M.H. Chisholm, M.J. Hampden-Smith, J.C. Huffman, K. Folting, P.D. Ellis and B.A. Huggins, Angew. Chem., 101 (1989) 1547; Angew. Chem., Int. Ed. Engl., 28 (1989) 1523; S.T. Chacon, M.H. Chisholm, K. Folting, J.C. Huffman and M.J. Hampden-Smith, Organometallics, 10 (1991) 3722; F.A. Cotton and E.S. Shamshoum, J. Am. Chem. Soc., 107 (1985) 4662; F.A. Cotton and E.S. Shamshoum, Polyhedron, 4 (1985) 1727; F.A. Cotton, W. Schwotzer and E.S. Shamshoum, Organometallics, 4 (1985) 461; P. Leoni, M. Pasquali, G. Pieri, A. Albinati, P.S. Pregosin and H. Rüegger, Organometallics, 14 (1995) 3145; H. Dietrich, W. Mahdi and W. Storck, J. Organomet. Chem., 349 (1988) 1; S. Harder, J. Boersma, L. Brandsma, A. van Heteren, J.A. Kanters, W. Bauer and P.v.R. Schleyer, J. Am. Chem. Soc., 110 (1988) 7802; F.A. Cotton and M. Millar, J. Am. Chem. Soc., 99 (1977) 7886; F.A. Cotton, G.E. Lewis, G.N. Graham and N. Mott, Inorg. Chem., 22 (1983) 560; S.L. Buchwald, E.A. Lucas and W.M. Davis, J. Am. Chem. Soc., 111 (1989) 397; W.J. Evans, T.P. Hanusa, J.H. Meadows, W.E. Hunter and J.L. Atwood, Organometallics, 6 (1987) 295; M. Menzel, D. Steiner, H.J. Winkler, D. Schwikart, S. Mehle, S. Fau, G. Frenking, W. Massa and A. Berndt, Angew. Chem., 107 (1995) 368; Angew. Chem., Int. Ed. Engl., 34 (1995) 327; A. Gunale, H. Pritzkow, W. Siebert, D. Steiner and A. Berndt, Angew. Chem., 107 (1995) 1194; Angew. Chem., Int. Ed. Engl., 34 (1995) 1111.
46. [12] For other recently disclosed examples of "anti-van't Hoff/Le-Bel compounds" see e.g.: R.H. Cayton, S.T. Chacon, M.H. Chisholm, M.J. Hampden-Smith, J.C. Huffman, K. Folting, P.D. Ellis and B.A. Huggins, Angew. Chem., 101 (1989) 1547; Angew. Chem., Int. Ed. Engl., 28 (1989) 1523; S.T. Chacon, M.H. Chisholm, K. Folting, J.C. Huffman and M.J. Hampden-Smith, Organometallics, 10 (1991) 3722; F.A. Cotton and E.S. Shamshoum, J. Am. Chem. Soc., 107 (1985) 4662; F.A. Cotton and E.S. Shamshoum, Polyhedron, 4 (1985) 1727; F.A. Cotton, W. Schwotzer and E.S. Shamshoum, Organometallics, 4 (1985) 461; P. Leoni, M. Pasquali, G. Pieri, A. Albinati, P.S. Pregosin and H. Rüegger, Organometallics, 14 (1995) 3145; H. Dietrich, W. Mahdi and W. Storck, J. Organomet. Chem., 349 (1988) 1; S. Harder, J. Boersma, L. Brandsma, A. van Heteren, J.A. Kanters, W. Bauer and P.v.R. Schleyer, J. Am. Chem. Soc., 110 (1988) 7802; F.A. Cotton and M. Millar, J. Am. Chem. Soc., 99 (1977) 7886; F.A. Cotton, G.E. Lewis, G.N. Graham and N. Mott, Inorg. Chem., 22 (1983) 560; S.L. Buchwald, E.A. Lucas and W.M. Davis, J. Am. Chem. Soc., 111 (1989) 397; W.J. Evans, T.P. Hanusa, J.H. Meadows, W.E. Hunter and J.L. Atwood, Organometallics, 6 (1987) 295; M. Menzel, D. Steiner, H.J. Winkler, D. Schwikart, S. Mehle, S. Fau, G. Frenking, W. Massa and A. Berndt, Angew. Chem., 107 (1995) 368; Angew. Chem., Int. Ed. Engl., 34 (1995) 327; A. Gunale, H. Pritzkow, W. Siebert, D. Steiner and A. Berndt, Angew. Chem., 107 (1995) 1194; Angew. Chem., Int. Ed. Engl., 34 (1995) 1111.
47. [12] For other recently disclosed examples of "anti-van't Hoff/Le-Bel compounds" see e.g.: R.H. Cayton, S.T. Chacon, M.H. Chisholm, M.J. Hampden-Smith, J.C. Huffman, K. Folting, P.D. Ellis and B.A. Huggins, Angew. Chem., 101 (1989) 1547; Angew. Chem., Int. Ed. Engl., 28 (1989) 1523; S.T. Chacon, M.H. Chisholm, K. Folting, J.C. Huffman and M.J. Hampden-Smith, Organometallics, 10 (1991) 3722; F.A. Cotton and E.S. Shamshoum, J. Am. Chem. Soc., 107 (1985) 4662; F.A. Cotton and E.S. Shamshoum, Polyhedron, 4 (1985) 1727; F.A. Cotton, W. Schwotzer and E.S. Shamshoum, Organometallics, 4 (1985) 461; P. Leoni, M. Pasquali, G. Pieri, A. Albinati, P.S. Pregosin and H. Rüegger, Organometallics, 14 (1995) 3145; H. Dietrich, W. Mahdi and W. Storck, J. Organomet. Chem., 349 (1988) 1; S. Harder, J. Boersma, L. Brandsma, A. van Heteren, J.A. Kanters, W. Bauer and P.v.R. Schleyer, J. Am. Chem. Soc., 110 (1988) 7802; F.A. Cotton and M. Millar, J. Am. Chem. Soc., 99 (1977) 7886; F.A. Cotton, G.E. Lewis, G.N. Graham and N. Mott, Inorg. Chem., 22 (1983) 560; S.L. Buchwald, E.A. Lucas and W.M. Davis, J. Am. Chem. Soc., 111 (1989) 397; W.J. Evans, T.P. Hanusa, J.H. Meadows, W.E. Hunter and J.L. Atwood, Organometallics, 6 (1987) 295; M. Menzel, D. Steiner, H.J. Winkler, D. Schwikart, S. Mehle, S. Fau, G. Frenking, W. Massa and A. Berndt, Angew. Chem., 107 (1995) 368; Angew. Chem., Int. Ed. Engl., 34 (1995) 327; A. Gunale, H. Pritzkow, W. Siebert, D. Steiner and A. Berndt, Angew. Chem., 107 (1995) 1194; Angew. Chem., Int. Ed. Engl., 34 (1995) 1111.
48. [12] For other recently disclosed examples of "anti-van't Hoff/Le-Bel compounds" see e.g.: R.H. Cayton, S.T. Chacon, M.H. Chisholm, M.J. Hampden-Smith, J.C. Huffman, K. Folting, P.D. Ellis and B.A. Huggins, Angew. Chem., 101 (1989) 1547; Angew. Chem., Int. Ed. Engl., 28 (1989) 1523; S.T. Chacon, M.H. Chisholm, K. Folting, J.C. Huffman and M.J. Hampden-Smith, Organometallics, 10 (1991) 3722; F.A. Cotton and E.S. Shamshoum, J. Am. Chem. Soc., 107 (1985) 4662; F.A. Cotton and E.S. Shamshoum, Polyhedron, 4 (1985) 1727; F.A. Cotton, W. Schwotzer and E.S. Shamshoum, Organometallics, 4 (1985) 461; P. Leoni, M. Pasquali, G. Pieri, A. Albinati, P.S. Pregosin and H. Rüegger, Organometallics, 14 (1995) 3145; H. Dietrich, W. Mahdi and W. Storck, J. Organomet. Chem., 349 (1988) 1; S. Harder, J. Boersma, L. Brandsma, A. van Heteren, J.A. Kanters, W. Bauer and P.v.R. Schleyer, J. Am. Chem. Soc., 110 (1988) 7802; F.A. Cotton and M. Millar, J. Am. Chem. Soc., 99 (1977) 7886; F.A. Cotton, G.E. Lewis, G.N. Graham and N. Mott, Inorg. Chem., 22 (1983) 560; S.L. Buchwald, E.A. Lucas and W.M. Davis, J. Am. Chem. Soc., 111 (1989) 397; W.J. Evans, T.P. Hanusa, J.H. Meadows, W.E. Hunter and J.L. Atwood, Organometallics, 6 (1987) 295; M. Menzel, D. Steiner, H.J. Winkler, D. Schwikart, S. Mehle, S. Fau, G. Frenking, W. Massa and A. Berndt, Angew. Chem., 107 (1995) 368; Angew. Chem., Int. Ed. Engl., 34 (1995) 327; A. Gunale, H. Pritzkow, W. Siebert, D. Steiner and A. Berndt, Angew. Chem., 107 (1995) 1194; Angew. Chem., Int. Ed. Engl., 34 (1995) 1111.
49. [12] For other recently disclosed examples of "anti-van't Hoff/Le-Bel compounds" see e.g.: R.H. Cayton, S.T. Chacon, M.H. Chisholm, M.J. Hampden-Smith, J.C. Huffman, K. Folting, P.D. Ellis and B.A. Huggins, Angew. Chem., 101 (1989) 1547; Angew. Chem., Int. Ed. Engl., 28 (1989) 1523; S.T. Chacon, M.H. Chisholm, K. Folting, J.C. Huffman and M.J. Hampden-Smith, Organometallics, 10 (1991) 3722; F.A. Cotton and E.S. Shamshoum, J. Am. Chem. Soc., 107 (1985) 4662; F.A. Cotton and E.S. Shamshoum, Polyhedron, 4 (1985) 1727; F.A. Cotton, W. Schwotzer and E.S. Shamshoum, Organometallics, 4 (1985) 461; P. Leoni, M. Pasquali, G. Pieri, A. Albinati, P.S. Pregosin and H. Rüegger, Organometallics, 14 (1995) 3145; H. Dietrich, W. Mahdi and W. Storck, J. Organomet. Chem., 349 (1988) 1; S. Harder, J. Boersma, L. Brandsma, A. van Heteren, J.A. Kanters, W. Bauer and P.v.R. Schleyer, J. Am. Chem. Soc., 110 (1988) 7802; F.A. Cotton and M. Millar, J. Am. Chem. Soc., 99 (1977) 7886; F.A. Cotton, G.E. Lewis, G.N. Graham and N. Mott, Inorg. Chem., 22 (1983) 560; S.L. Buchwald, E.A. Lucas and W.M. Davis, J. Am. Chem. Soc., 111 (1989) 397; W.J. Evans, T.P. Hanusa, J.H. Meadows, W.E. Hunter and J.L. Atwood, Organometallics, 6 (1987) 295; M. Menzel, D. Steiner, H.J. Winkler, D. Schwikart, S. Mehle, S. Fau, G. Frenking, W. Massa and A. Berndt, Angew. Chem., 107 (1995) 368; Angew. Chem., Int. Ed. Engl., 34 (1995) 327; A. Gunale, H. Pritzkow, W. Siebert, D. Steiner and A. Berndt, Angew. Chem., 107 (1995) 1194; Angew. Chem., Int. Ed. Engl., 34 (1995) 1111.
50. [12] For other recently disclosed examples of "anti-van't Hoff/Le-Bel compounds" see e.g.: R.H. Cayton, S.T. Chacon, M.H. Chisholm, M.J. Hampden-Smith, J.C. Huffman, K. Folting, P.D. Ellis and B.A. Huggins, Angew. Chem., 101 (1989) 1547; Angew. Chem., Int. Ed. Engl., 28 (1989) 1523; S.T. Chacon, M.H. Chisholm, K. Folting, J.C. Huffman and M.J. Hampden-Smith, Organometallics, 10 (1991) 3722; F.A. Cotton and E.S. Shamshoum, J. Am. Chem. Soc., 107 (1985) 4662; F.A. Cotton and E.S. Shamshoum, Polyhedron, 4 (1985) 1727; F.A. Cotton, W. Schwotzer and E.S. Shamshoum, Organometallics, 4 (1985) 461; P. Leoni, M. Pasquali, G. Pieri, A. Albinati, P.S. Pregosin and H. Rüegger, Organometallics, 14 (1995) 3145; H. Dietrich, W. Mahdi and W. Storck, J. Organomet. Chem., 349 (1988) 1; S. Harder, J. Boersma, L. Brandsma, A. van Heteren, J.A. Kanters, W. Bauer and P.v.R. Schleyer, J. Am. Chem. Soc., 110 (1988) 7802; F.A. Cotton and M. Millar, J. Am. Chem. Soc., 99 (1977) 7886; F.A. Cotton, G.E. Lewis, G.N. Graham and N. Mott, Inorg. Chem., 22 (1983) 560; S.L. Buchwald, E.A. Lucas and W.M. Davis, J. Am. Chem. Soc., 111 (1989) 397; W.J. Evans, T.P. Hanusa, J.H. Meadows, W.E. Hunter and J.L. Atwood, Organometallics, 6 (1987) 295; M. Menzel, D. Steiner, H.J. Winkler, D. Schwikart, S. Mehle, S. Fau, G. Frenking, W. Massa and A. Berndt, Angew. Chem., 107 (1995) 368; Angew. Chem., Int. Ed. Engl., 34 (1995) 327; A. Gunale, H. Pritzkow, W. Siebert, D. Steiner and A. Berndt, Angew. Chem., 107 (1995) 1194; Angew. Chem., Int. Ed. Engl., 34 (1995) 1111.
51. [12] For other recently disclosed examples of "anti-van't Hoff/Le-Bel compounds" see e.g.: R.H. Cayton, S.T. Chacon, M.H. Chisholm, M.J. Hampden-Smith, J.C. Huffman, K. Folting, P.D. Ellis and B.A. Huggins, Angew. Chem., 101 (1989) 1547; Angew. Chem., Int. Ed. Engl., 28 (1989) 1523; S.T. Chacon, M.H. Chisholm, K. Folting, J.C. Huffman and M.J. Hampden-Smith, Organometallics, 10 (1991) 3722; F.A. Cotton and E.S. Shamshoum, J. Am. Chem. Soc., 107 (1985) 4662; F.A. Cotton and E.S. Shamshoum, Polyhedron, 4 (1985) 1727; F.A. Cotton, W. Schwotzer and E.S. Shamshoum, Organometallics, 4 (1985) 461; P. Leoni, M. Pasquali, G. Pieri, A. Albinati, P.S. Pregosin and H. Rüegger, Organometallics, 14 (1995) 3145; H. Dietrich, W. Mahdi and W. Storck, J. Organomet. Chem., 349 (1988) 1; S. Harder, J. Boersma, L. Brandsma, A. van Heteren, J.A. Kanters, W. Bauer and P.v.R. Schleyer, J. Am. Chem. Soc., 110 (1988) 7802; F.A. Cotton and M. Millar, J. Am. Chem. Soc., 99 (1977) 7886; F.A. Cotton, G.E. Lewis, G.N. Graham and N. Mott, Inorg. Chem., 22 (1983) 560; S.L. Buchwald, E.A. Lucas and W.M. Davis, J. Am. Chem. Soc., 111 (1989) 397; W.J. Evans, T.P. Hanusa, J.H. Meadows, W.E. Hunter and J.L. Atwood, Organometallics, 6 (1987) 295; M. Menzel, D. Steiner, H.J. Winkler, D. Schwikart, S. Mehle, S. Fau, G. Frenking, W. Massa and A. Berndt, Angew. Chem., 107 (1995) 368; Angew. Chem., Int. Ed. Engl., 34 (1995) 327; A. Gunale, H. Pritzkow, W. Siebert, D. Steiner and A. Berndt, Angew. Chem., 107 (1995) 1194; Angew. Chem., Int. Ed. Engl., 34 (1995) 1111.
52. [12] For other recently disclosed examples of "anti-van't Hoff/Le-Bel compounds" see e.g.: R.H. Cayton, S.T. Chacon, M.H. Chisholm, M.J. Hampden-Smith, J.C. Huffman, K. Folting, P.D. Ellis and B.A. Huggins, Angew. Chem., 101 (1989) 1547; Angew. Chem., Int. Ed. Engl., 28 (1989) 1523; S.T. Chacon, M.H. Chisholm, K. Folting, J.C. Huffman and M.J. Hampden-Smith, Organometallics, 10 (1991) 3722; F.A. Cotton and E.S. Shamshoum, J. Am. Chem. Soc., 107 (1985) 4662; F.A. Cotton and E.S. Shamshoum, Polyhedron, 4 (1985) 1727; F.A. Cotton, W. Schwotzer and E.S. Shamshoum, Organometallics, 4 (1985) 461; P. Leoni, M. Pasquali, G. Pieri, A. Albinati, P.S. Pregosin and H. Rüegger, Organometallics, 14 (1995) 3145; H. Dietrich, W. Mahdi and W. Storck, J. Organomet. Chem., 349 (1988) 1; S. Harder, J. Boersma, L. Brandsma, A. van Heteren, J.A. Kanters, W. Bauer and P.v.R. Schleyer, J. Am. Chem. Soc., 110 (1988) 7802; F.A. Cotton and M. Millar, J. Am. Chem. Soc., 99 (1977) 7886; F.A. Cotton, G.E. Lewis, G.N. Graham and N. Mott, Inorg. Chem., 22 (1983) 560; S.L. Buchwald, E.A. Lucas and W.M. Davis, J. Am. Chem. Soc., 111 (1989) 397; W.J. Evans, T.P. Hanusa, J.H. Meadows, W.E. Hunter and J.L. Atwood, Organometallics, 6 (1987) 295; M. Menzel, D. Steiner, H.J. Winkler, D. Schwikart, S. Mehle, S. Fau, G. Frenking, W. Massa and A. Berndt, Angew. Chem., 107 (1995) 368; Angew. Chem., Int. Ed. Engl., 34 (1995) 327; A. Gunale, H. Pritzkow, W. Siebert, D. Steiner and A. Berndt, Angew. Chem., 107 (1995) 1194; Angew. Chem., Int. Ed. Engl., 34 (1995) 1111.
53. [12] For other recently disclosed examples of "anti-van't Hoff/Le-Bel compounds" see e.g.: R.H. Cayton, S.T. Chacon, M.H. Chisholm, M.J. Hampden-Smith, J.C. Huffman, K. Folting, P.D. Ellis and B.A. Huggins, Angew. Chem., 101 (1989) 1547; Angew. Chem., Int. Ed. Engl., 28 (1989) 1523; S.T. Chacon, M.H. Chisholm, K. Folting, J.C. Huffman and M.J. Hampden-Smith, Organometallics, 10 (1991) 3722; F.A. Cotton and E.S. Shamshoum, J. Am. Chem. Soc., 107 (1985) 4662; F.A. Cotton and E.S. Shamshoum, Polyhedron, 4 (1985) 1727; F.A. Cotton, W. Schwotzer and E.S. Shamshoum, Organometallics, 4 (1985) 461; P. Leoni, M. Pasquali, G. Pieri, A. Albinati, P.S. Pregosin and H. Rüegger, Organometallics, 14 (1995) 3145; H. Dietrich, W. Mahdi and W. Storck, J. Organomet. Chem., 349 (1988) 1; S. Harder, J. Boersma, L. Brandsma, A. van Heteren, J.A. Kanters, W. Bauer and P.v.R. Schleyer, J. Am. Chem. Soc., 110 (1988) 7802; F.A. Cotton and M. Millar, J. Am. Chem. Soc., 99 (1977) 7886; F.A. Cotton, G.E. Lewis, G.N. Graham and N. Mott, Inorg. Chem., 22 (1983) 560; S.L. Buchwald, E.A. Lucas and W.M. Davis, J. Am. Chem. Soc., 111 (1989) 397; W.J. Evans, T.P. Hanusa, J.H. Meadows, W.E. Hunter and J.L. Atwood, Organometallics, 6 (1987) 295; M. Menzel, D. Steiner, H.J. Winkler, D. Schwikart, S. Mehle, S. Fau, G. Frenking, W. Massa and A. Berndt, Angew. Chem., 107 (1995) 368; Angew. Chem., Int. Ed. Engl., 34 (1995) 327; A. Gunale, H. Pritzkow, W. Siebert, D. Steiner and A. Berndt, Angew. Chem., 107 (1995) 1194; Angew. Chem., Int. Ed. Engl., 34 (1995) 1111.
54. [12] For other recently disclosed examples of "anti-van't Hoff/Le-Bel compounds" see e.g.: R.H. Cayton, S.T. Chacon, M.H. Chisholm, M.J. Hampden-Smith, J.C. Huffman, K. Folting, P.D. Ellis and B.A. Huggins, Angew. Chem., 101 (1989) 1547; Angew. Chem., Int. Ed. Engl., 28 (1989) 1523; S.T. Chacon, M.H. Chisholm, K. Folting, J.C. Huffman and M.J. Hampden-Smith, Organometallics, 10 (1991) 3722; F.A. Cotton and E.S. Shamshoum, J. Am. Chem. Soc., 107 (1985) 4662; F.A. Cotton and E.S. Shamshoum, Polyhedron, 4 (1985) 1727; F.A. Cotton, W. Schwotzer and E.S. Shamshoum, Organometallics, 4 (1985) 461; P. Leoni, M. Pasquali, G. Pieri, A. Albinati, P.S. Pregosin and H. Rüegger, Organometallics, 14 (1995) 3145; H. Dietrich, W. Mahdi and W. Storck, J. Organomet. Chem., 349 (1988) 1; S. Harder, J. Boersma, L. Brandsma, A. van Heteren, J.A. Kanters, W. Bauer and P.v.R. Schleyer, J. Am. Chem. Soc., 110 (1988) 7802; F.A. Cotton and M. Millar, J. Am. Chem. Soc., 99 (1977) 7886; F.A. Cotton, G.E. Lewis, G.N. Graham and N. Mott, Inorg. Chem., 22 (1983) 560; S.L. Buchwald, E.A. Lucas and W.M. Davis, J. Am. Chem. Soc., 111 (1989) 397; W.J. Evans, T.P. Hanusa, J.H. Meadows, W.E. Hunter and J.L. Atwood, Organometallics, 6 (1987) 295; M. Menzel, D. Steiner, H.J. Winkler, D. Schwikart, S. Mehle, S. Fau, G. Frenking, W. Massa and A. Berndt, Angew. Chem., 107 (1995) 368; Angew. Chem., Int. Ed. Engl., 34 (1995) 327; A. Gunale, H. Pritzkow, W. Siebert, D. Steiner and A. Berndt, Angew. Chem., 107 (1995) 1194; Angew. Chem., Int. Ed. Engl., 34 (1995) 1111.