Redefining the coordination geometry and reactivity of guanidinate complexes by covalently linking the guanidinate ligands. Synthesis and reactivity of [RN{NH(R)}CN(CH2)2NC{NH(R)}NR]M(CH2 Ph)2 (R = iPr; M = Ti, Zr)

Organometallics

Volumn 22, Issue 3, 2003, Pages 387-389

  Ong, Tiow Gan ^a   Yap, Glenn P A ^a   Richeson, Darrin S ^a  

^a UNIVERSITY OF OTTAWA   (Canada)

Author keywords

[No Author keywords available]

Indexed keywords

COVALENTLY LINKING; GUANIDINATE COMPLEXES; REACTIVITY;

CHEMICAL BONDS; CRYSTAL STRUCTURE; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; REACTION KINETICS; SYNTHESIS (CHEMICAL);

ORGANOMETALLICS;

EID: 0037416051     PISSN: 02767333     EISSN: None     Source Type: Journal    
DOI: 10.1021/om020830g     Document Type: Article

References (33)

1. For reviews of benzamidinate complexes see: (a) Edelmann, F. Coord. Chem. Rev. 1994, 94, 403.
2. (b) Barker, J.; Kilner, M. Coord. Chem. Rev. 1994, 94, 219.
3. For a recent review of guanidinate complexes see: Bailey, P. J.; Pace, S. Coord. Chem. Rev. 2001, 214, 91.
4. (a) Lu, Z.; Yap, G. P. A.; Richeson, D. S. Organometallics 2001, 20, 706.
5. (b) Foley, S. R.; Yap, G. P. A.; Richardson, D. S. J. Chem. Soc., Chem. Commun. 2000, 1515.
6. (c) Thirupathi, N.; Yap, G. P. A.; Richeson, D. S. Organometallics 2000, 19, 2573.
7. (d) Foley, S. R.; Yap, G. P. A.; Richeson, D. S. J. Chem. Soc., Dalton Trans. 2000, 1663.
8. (e) Foley, S. R.; Zhou, Y.; Yap, G. P. A.; Richeson, D. S. Inorg. Chem. 2000, 39, 924.
9. (f) Thirupathi, N.; Yap, G. P. A.; Richeson, D. S. J. Chem. Soc., Chem. Commun. 1999, 2483.
10. For a recent examination of the effect of bridging groups in ansametallocenes see: Zachmanoglou, C. E.; Docrat, A.; Bridgewater, B. M.; Parkin, G.; Brandow, C. G.; Bercaw, J. E.; Jardine, C. N.; Lyall, M.; Green, J. C.; Keister, J. B. J. Am. Chem. Soc. 2002, 124, 9525 and references therein.
11. (a) Hagadorn, J. R. Chem. Commun. 2001, 2144.
12. (b) Chen, C.-T.; Rees, L. H.; Cowley, A. R.; Green, M. L. H.; J. Chem. Soc., Dalton Trans. 2001, 1761.
13. (c) Bambirra, S.; Meetsma, A.; Hessen, B.; Teuben, J. H. Organometallics 2001, 20, 782.
14. (d) Bambirra, S.; Brandsma, M. J. R.; Brussee, E. A. C.; Meetsma, A.; Hessen, B.; Teuben, J. H. Organometallics 2000, 19, 3197.
15. (e) Hagadorn, J. R.; Arnold, J. Angew. Chem., Int. Ed. 1998, 37, 1729.
16. (f) Brandsma, M. J. R.; Brussee, E. A. C.; Meetsma, A.; Hessen, B.; Teuben, J. H. Eur. J. Inorg. Chem. 1998, 1867.
17. Giesbrecht, G. R.; Shafir, A.; Arnold, J. Inorg. Chem. 2001, 40, 6069.
18. (a) Mullins, S. M.; Duncan, A. P.; Bergman, R. G.; Arnold, J. Inorg. Chem. 2001, 40, 6952.
19. (b) Duncan, A. P.; Mullins, S. M.; Arnold, J.; Bergman, R. G. Organometallics 2001, 20, 1808.
20. (a) Ong, T.-G.; Wood, D.; Yap, G. P. A.; Richeson, D. S. Organometallics 2002, 21, 1.
21. (b) Ong, T.-G.; Yap, G. P. A.; Richeson, D. S. Organometallics 2002, 21, 2839-2841.
22. 3, Z = 4, R indices (I > 2σ(I)) R1 = 0.0414 and wR2 = 0.0992. The structure was refined as a racemic twin with a refined absolute structure parameter of 0.62(3).
23. 3, Z = 4, R indices (I > 2σ(I)) R1 = 0.0442 and wR2 = 0.0882.
24. For a review of the insertion chemistry of isocyanides see: Durfee, L. D.; Rothwell, I. P. Chem. Rev. 1988, 88, 1059 and references therein.
25. The single-crystal X-ray structure for compound 4 has been determined. Full structural details will be reported in a future paper.
26. 2-iminoacyl groups to yield enediamido ligands has been observed for group 4 complexes with a variety of supporting ligand environments: Chamberlain, L. R.; Durfee, L. D.; Fanwick, P. E.; Kobriger, L. M.; Latesky, S. L.; McMullen, A. K.; Steffey, B. D.; Rothwell I. P.; Folting, K.; Huffman, J. C. J. Am. Chem. Soc. 1987, 109, 6068.
27. Durfee, L. D.; McMullen, A. K.; Rothwell, I. P. J. Am. Chem. Soc. 1988, 110, 1463.
28. Scott, M. J.; Lippard, S. J. Organometallics 1997, 16, 5857.
29. Giannini, L.; Caselli, A.; Solari, E.; Floriani, C.; Chiesi-Villa, A.; Rizzoli, C.; Re, N.; Sgamellotti, A. J. Am. Chem. Soc. 1997, 119, 9709.
30. 3, Z = 4, R indices (I > 2σ(I)) R1 = 0.0608 and wR2 = 0.1399.
31. Beshouri, S. M.; Chebi, D. E.; Fanwick, P. E.; Rothwell, I. P.; Huffman, J. C. Organometallics 1990, 9, 2375.
32. Beshouri, S. M.; Fanwick, P. E.; Rothwell, I. P.; Huffman, J. C. Organometallics 1987, 6, 891.
33. Arnold, J.; Tilley, T. D.; Rheingold, A. L.; Geib, S. J.; Arif, A. M. J. Am. Chem. Soc. 1989, 111, 149.