Borane insertion into group-4 metal-to-carbon bonds: The reaction of HB(C6F5)2 with (η2-formaldehyde)zirconocene dimer and with (butadiene)zirconocene

European Journal of Inorganic Chemistry

Volumn , Issue 12, 1999, Pages 2243-2247

  Blaschke, Ulrich ^a   Erker, Gerhard ^a   Fröhlich, Roland ^a   Meyer, Oliver ^a  

^a UNIVERSITY OF MÜNSTER   (Germany)

Author keywords

(Formaldehyde)zirconocene (Butadiene)zirconocene; Boron; HBR2 addition; Heterocycles; Metallaoxirane

Indexed keywords

BROMINE COMPOUNDS; BUTADIENE; CARBON; CRYSTAL STRUCTURE; FORMALDEHYDE; ZIRCONIUM COMPOUNDS;

(FORMALDEHYDE)ZIRCONOCENE/(BUTADIENE)ZIRCONOCENE; CARBON BOND; GROUP 4; HBR2 ADDITION; HETEROCYCLES; INSERTION PRODUCTS; METALLAOXIRANE; MOLAR EQUIVALENT; ZIRCONOCENES;

BORON;

1,3 BUTADIENE DERIVATIVE; BORANE DERIVATIVE; ZIRCONIUM DERIVATIVE;

ARTICLE; CHEMICAL BINDING; CRYSTAL STRUCTURE; METAL INDUSTRY; MOLECULAR INTERACTION; SYNTHESIS;

EID: 0032697833     PISSN: 14341948     EISSN: None     Source Type: Journal    
DOI: 10.1002/(sici)1099-0682(199912)1999:12<2243::aid-ejic2243>3.0.co;2-0     Document Type: Article

References (52)

1. G. Erker, C. Krüger, G. Müller, Adv. Organomet. Chem. 1985, 24, 1, and references cited therein.
2. G. Erker, R. Noe, D. Wingbermühle, J. L. Petersen, Angew. Chem. 1993, 105, 1216; Angew. Chem. Int. Ed. Engl. 1993, 32, 1213.
3. G. Erker, R. Noe, D. Wingbermühle, J. L. Petersen, Angew. Chem. 1993, 105, 1216; Angew. Chem. Int. Ed. Engl. 1993, 32, 1213.
4. [3a] D. J. Parks, R. E. v. H. Spence, W. E. Piers, Angew. Chem. 1995, 107, 895; Angew. Chem. Int. Ed. Engl. 1995, 34, 809.
5. [3a] D. J. Parks, R. E. v. H. Spence, W. E. Piers, Angew. Chem. 1995, 107, 895; Angew. Chem. Int. Ed. Engl. 1995, 34, 809.
6. [3b] R. E. v. H. Spence, W. E. Piers, Organometallics 1995, 14, 4617.
7. Y. Sun, W. E. Piers, S. J. Rettig, Organometallics 1996, 15, 4110.
8. [5a] R. E. v. Spence, D. J. Parks, W. E. Piers, M.-A. MacDonald, M. J. Zaworotko, S. J. Rettig, Angew. Chem. 1995, 107, 1337; Angew. Chem. Int. Ed. Engl. 1995, 34, 1230.
9. [5a] R. E. v. Spence, D. J. Parks, W. E. Piers, M.-A. MacDonald, M. J. Zaworotko, S. J. Rettig, Angew. Chem. 1995, 107, 1337; Angew. Chem. Int. Ed. Engl. 1995, 34, 1230.
10. [5b] U. Radius, S. J. Silverio, R. Hoffmann, R. Gleiter, Organometallics 1996, 15, 3737.
11. [5c] Y. Sun, R. E. v. H. Spence, W. E. Piers, M. Parvez, G. P. A. Yap, J. Am. Chem. Soc. 1997, 119, 5132.
12. [5d] R. E. v. H. Spence, W. E. Piers, Y. Sun, M. Parvez, L. R. MacGillivray, M. J. Zaworotko, Organometallics 1998, 17, 2459.
13. Review: W. E. Piers, T. Chivers, Chem. Soc. Rev. 1997, 345.
14. G. Erker, K. Kropp, C. Krüger, A.-P. Chiang, Chem. Ber. 1982, 115, 2447; G. Erker, Acc. Chem. Res. 1984, 17, 103, and references cited therein.
15. G. Erker, K. Kropp, C. Krüger, A.-P. Chiang, Chem. Ber. 1982, 115, 2447; G. Erker, Acc. Chem. Res. 1984, 17, 103, and references cited therein.
16. U. Blaschke, G. Erker, M. Nissinen, E. Wegelius, R. Fröhlich, Organometallics 1999, 18, 1224; U. Blaschke, F. Menges, G. Erker, R. Fröhlich, Eur. J. Inorg. Chem. 1999, 621.
17. U. Blaschke, G. Erker, M. Nissinen, E. Wegelius, R. Fröhlich, Organometallics 1999, 18, 1224; U. Blaschke, F. Menges, G. Erker, R. Fröhlich, Eur. J. Inorg. Chem. 1999, 621.
18. G. Erker, U. Hoffmann, R. Zwettler, P. Betz, C. Krüger, Angew. Chem. 1989, 101, 644; Angew. Chem. Int. Ed. Engl. 1989, 28, 630; See also: K. Kropp, V. Skibbe, G. Erker, C. Krüger, J. Am. Chem. Soc. 1983, 105, 3353.
19. G. Erker, U. Hoffmann, R. Zwettler, P. Betz, C. Krüger, Angew. Chem. 1989, 101, 644; Angew. Chem. Int. Ed. Engl. 1989, 28, 630; See also: K. Kropp, V. Skibbe, G. Erker, C. Krüger, J. Am. Chem. Soc. 1983, 105, 3353.
20. G. Erker, U. Hoffmann, R. Zwettler, P. Betz, C. Krüger, Angew. Chem. 1989, 101, 644; Angew. Chem. Int. Ed. Engl. 1989, 28, 630; See also: K. Kropp, V. Skibbe, G. Erker, C. Krüger, J. Am. Chem. Soc. 1983, 105, 3353.
21. For related systems see e.g.: G. Erker, U. Dorf, P. Czisch, J. L. Petersen, Organometallics 1986, 5, 668; R. M. Waymouth, B. D. Santarsiero, R. J. Coots, M. J. Bronikowski, R. H. Grubbs, J. Am. Chem. Soc. 1986, 108, 1427; R. M. Waymouth, R. H. Grubbs, Organometallics 1988, 7, 1631.
22. For related systems see e.g.: G. Erker, U. Dorf, P. Czisch, J. L. Petersen, Organometallics 1986, 5, 668; R. M. Waymouth, B. D. Santarsiero, R. J. Coots, M. J. Bronikowski, R. H. Grubbs, J. Am. Chem. Soc. 1986, 108, 1427; R. M. Waymouth, R. H. Grubbs, Organometallics 1988, 7, 1631.
23. For related systems see e.g.: G. Erker, U. Dorf, P. Czisch, J. L. Petersen, Organometallics 1986, 5, 668; R. M. Waymouth, B. D. Santarsiero, R. J. Coots, M. J. Bronikowski, R. H. Grubbs, J. Am. Chem. Soc. 1986, 108, 1427; R. M. Waymouth, R. H. Grubbs, Organometallics 1988, 7, 1631.
24. G. Erker, U. Hoffmann, R. Zwettler, C. Krüger, J. Organomet. Chem. 1989, 367, C15.
25. 3 see: D. Röttger, S. Schmuck, G. Erker, J. Organomet. Chem. 1996, 508, 263.
26. G. Fachinetti, C. Floriani, A. Roselli, S. Pucci, J. Chem. Soc., Chem. Commun. 1978, 269; S. Gambarotta, C. Floriani, A. Chiesi-Villa, C. Guastini, J. Am. Chem. Soc. 1983, 105, 1690.
27. G. Fachinetti, C. Floriani, A. Roselli, S. Pucci, J. Chem. Soc., Chem. Commun. 1978, 269; S. Gambarotta, C. Floriani, A. Chiesi-Villa, C. Guastini, J. Am. Chem. Soc. 1983, 105, 1690.
28. Zr-(μ-H)-B bond lengths range from 1.125 to 1.529 A (for H-B) and from 1.947 to 2.273 A (for Zr-H) in the literature, see: D. Männig, H. Nöth, M. Schwartz, S. Weber, U. Wietelmann, Angew. Chem. 1985, 97, 979; Angew. Chem. Int. Ed. Engl. 1985, 24, 998; D. L. Reger, R. Mahtab, J. C. Baxter, L. Lebioda, Inorg. Chem. 1986, 25, 2046; G. T. Jordan IV, S. G. Shore, Inorg. Chem. 1996, 35, 1087; and the articles cited in refs. 2, 4, 5a, 5c, and 11.
29. Zr-(μ-H)-B bond lengths range from 1.125 to 1.529 A (for H-B) and from 1.947 to 2.273 A (for Zr-H) in the literature, see: D. Männig, H. Nöth, M. Schwartz, S. Weber, U. Wietelmann, Angew. Chem. 1985, 97, 979; Angew. Chem. Int. Ed. Engl. 1985, 24, 998; D. L. Reger, R. Mahtab, J. C. Baxter, L. Lebioda, Inorg. Chem. 1986, 25, 2046; G. T. Jordan IV, S. G. Shore, Inorg. Chem. 1996, 35, 1087; and the articles cited in refs. 2, 4, 5a, 5c, and 11.
30. Zr-(μ-H)-B bond lengths range from 1.125 to 1.529 A (for H-B) and from 1.947 to 2.273 A (for Zr-H) in the literature, see: D. Männig, H. Nöth, M. Schwartz, S. Weber, U. Wietelmann, Angew. Chem. 1985, 97, 979; Angew. Chem. Int. Ed. Engl. 1985, 24, 998; D. L. Reger, R. Mahtab, J. C. Baxter, L. Lebioda, Inorg. Chem. 1986, 25, 2046; G. T. Jordan IV, S. G. Shore, Inorg. Chem. 1996, 35, 1087; and the articles cited in refs. 2, 4, 5a, 5c, and 11.
31. Zr-(μ-H)-B bond lengths range from 1.125 to 1.529 A (for H-B) and from 1.947 to 2.273 A (for Zr-H) in the literature, see: D. Männig, H. Nöth, M. Schwartz, S. Weber, U. Wietelmann, Angew. Chem. 1985, 97, 979; Angew. Chem. Int. Ed. Engl. 1985, 24, 998; D. L. Reger, R. Mahtab, J. C. Baxter, L. Lebioda, Inorg. Chem. 1986, 25, 2046; G. T. Jordan IV, S. G. Shore, Inorg. Chem. 1996, 35, 1087; and the articles cited in refs. 2, 4, 5a, 5c, and 11.
32. 2 containing structures see e.g.: I. D. Williams, S. F. Pedersen, K. B. Sharpless, S. J. Lippard, J. Am. Chem. Soc. 1984, 106, 6430; G. Erker, S. Dehnicke, M. Rump, C. Krüger, S. Werner, M. Nolte, Angew. Chem. 1991, 103, 1371; Angew. Int. Ed. Engl. 1991, 30, 1349; G. Erker, M. Rump, C. Krüger, M. Nolte, Inorg. Chim. Acta, 1992, 198, 679; W. Spaether, M. Rump, G. Erker, R. Fröhlich, J. Hecht, C. Krüger, J. Kuhnigk, Anales Quimica Int. Ed. 1997, 93, 394.
33. 2 containing structures see e.g.: I. D. Williams, S. F. Pedersen, K. B. Sharpless, S. J. Lippard, J. Am. Chem. Soc. 1984, 106, 6430; G. Erker, S. Dehnicke, M. Rump, C. Krüger, S. Werner, M. Nolte, Angew. Chem. 1991, 103, 1371; Angew. Int. Ed. Engl. 1991, 30, 1349; G. Erker, M. Rump, C. Krüger, M. Nolte, Inorg. Chim. Acta, 1992, 198, 679; W. Spaether, M. Rump, G. Erker, R. Fröhlich, J. Hecht, C. Krüger, J. Kuhnigk, Anales Quimica Int. Ed. 1997, 93, 394.
34. 2 containing structures see e.g.: I. D. Williams, S. F. Pedersen, K. B. Sharpless, S. J. Lippard, J. Am. Chem. Soc. 1984, 106, 6430; G. Erker, S. Dehnicke, M. Rump, C. Krüger, S. Werner, M. Nolte, Angew. Chem. 1991, 103, 1371; Angew. Int. Ed. Engl. 1991, 30, 1349; G. Erker, M. Rump, C. Krüger, M. Nolte, Inorg. Chim. Acta, 1992, 198, 679; W. Spaether, M. Rump, G. Erker, R. Fröhlich, J. Hecht, C. Krüger, J. Kuhnigk, Anales Quimica Int. Ed. 1997, 93, 394.
35. 2 containing structures see e.g.: I. D. Williams, S. F. Pedersen, K. B. Sharpless, S. J. Lippard, J. Am. Chem. Soc. 1984, 106, 6430; G. Erker, S. Dehnicke, M. Rump, C. Krüger, S. Werner, M. Nolte, Angew. Chem. 1991, 103, 1371; Angew. Int. Ed. Engl. 1991, 30, 1349; G. Erker, M. Rump, C. Krüger, M. Nolte, Inorg. Chim. Acta, 1992, 198, 679; W. Spaether, M. Rump, G. Erker, R. Fröhlich, J. Hecht, C. Krüger, J. Kuhnigk, Anales Quimica Int. Ed. 1997, 93, 394.
36. 2 containing structures see e.g.: I. D. Williams, S. F. Pedersen, K. B. Sharpless, S. J. Lippard, J. Am. Chem. Soc. 1984, 106, 6430; G. Erker, S. Dehnicke, M. Rump, C. Krüger, S. Werner, M. Nolte, Angew. Chem. 1991, 103, 1371; Angew. Int. Ed. Engl. 1991, 30, 1349; G. Erker, M. Rump, C. Krüger, M. Nolte, Inorg. Chim. Acta, 1992, 198, 679; W. Spaether, M. Rump, G. Erker, R. Fröhlich, J. Hecht, C. Krüger, J. Kuhnigk, Anales Quimica Int. Ed. 1997, 93, 394.
37. B. Temme, G. Erker, J. Karl, H. Luftmann, R. Fröhlich, S. Kotila, Angew. Chem. 1995, 107, 1867; Angew. Chem. Int. Ed. Engl. 1995, 34, 1755.
38. B. Temme, G. Erker, J. Karl, H. Luftmann, R. Fröhlich, S. Kotila, Angew. Chem. 1995, 107, 1867; Angew. Chem. Int. Ed. Engl. 1995, 34, 1755.
39. 3 adduct see: G. Erker, R. Noe, C. Krüger, S. Werner, Organometallics 1992, 11, 4174.
40. For additional related examples see e.g.: G. Erker, K. Engel, J. L. Atwood, W. E. Hunter, Angew. Chem. 1983, 95, 506; Angew. Chem. Int. Ed. Engl. 1983, 22, 494; G. Erker, U. Dorf, Angew. Chem. 1983, 95, 800; Angew. Chem. Int. Ed. Engl. 1983, 22, 777; H. Yasuda, Y. Kajihara, K. Mashima, K. Nagasuna, A. Nakamura, Chem. Lett. 1981, 671; G. Erker, K. Engel, U. Dorf, J. L. Atwood, W. E. Hunter, Angew. Chem. 1982, 94, 915; Angew. Chem. Int. Ed. Engl. 1982, 21, 913; G. Erker, R. Lecht, Y.-H. Tsai, C. Krüger, Chem. Ber. 1987, 120, 1763; G. Erker, U. Dorf, R. Benn, R.-D. Reinhard, J. L. Petersen, J. Am. Chem. Soc. 1984, 106, 7649.
41. For additional related examples see e.g.: G. Erker, K. Engel, J. L. Atwood, W. E. Hunter, Angew. Chem. 1983, 95, 506; Angew. Chem. Int. Ed. Engl. 1983, 22, 494; G. Erker, U. Dorf, Angew. Chem. 1983, 95, 800; Angew. Chem. Int. Ed. Engl. 1983, 22, 777; H. Yasuda, Y. Kajihara, K. Mashima, K. Nagasuna, A. Nakamura, Chem. Lett. 1981, 671; G. Erker, K. Engel, U. Dorf, J. L. Atwood, W. E. Hunter, Angew. Chem. 1982, 94, 915; Angew. Chem. Int. Ed. Engl. 1982, 21, 913; G. Erker, R. Lecht, Y.-H. Tsai, C. Krüger, Chem. Ber. 1987, 120, 1763; G. Erker, U. Dorf, R. Benn, R.-D. Reinhard, J. L. Petersen, J. Am. Chem. Soc. 1984, 106, 7649.
42. For additional related examples see e.g.: G. Erker, K. Engel, J. L. Atwood, W. E. Hunter, Angew. Chem. 1983, 95, 506; Angew. Chem. Int. Ed. Engl. 1983, 22, 494; G. Erker, U. Dorf, Angew. Chem. 1983, 95, 800; Angew. Chem. Int. Ed. Engl. 1983, 22, 777; H. Yasuda, Y. Kajihara, K. Mashima, K. Nagasuna, A. Nakamura, Chem. Lett. 1981, 671; G. Erker, K. Engel, U. Dorf, J. L. Atwood, W. E. Hunter, Angew. Chem. 1982, 94, 915; Angew. Chem. Int. Ed. Engl. 1982, 21, 913; G. Erker, R. Lecht, Y.-H. Tsai, C. Krüger, Chem. Ber. 1987, 120, 1763; G. Erker, U. Dorf, R. Benn, R.-D. Reinhard, J. L. Petersen, J. Am. Chem. Soc. 1984, 106, 7649.
43. For additional related examples see e.g.: G. Erker, K. Engel, J. L. Atwood, W. E. Hunter, Angew. Chem. 1983, 95, 506; Angew. Chem. Int. Ed. Engl. 1983, 22, 494; G. Erker, U. Dorf, Angew. Chem. 1983, 95, 800; Angew. Chem. Int. Ed. Engl. 1983, 22, 777; H. Yasuda, Y. Kajihara, K. Mashima, K. Nagasuna, A. Nakamura, Chem. Lett. 1981, 671; G. Erker, K. Engel, U. Dorf, J. L. Atwood, W. E. Hunter, Angew. Chem. 1982, 94, 915; Angew. Chem. Int. Ed. Engl. 1982, 21, 913; G. Erker, R. Lecht, Y.-H. Tsai, C. Krüger, Chem. Ber. 1987, 120, 1763; G. Erker, U. Dorf, R. Benn, R.-D. Reinhard, J. L. Petersen, J. Am. Chem. Soc. 1984, 106, 7649.
44. For additional related examples see e.g.: G. Erker, K. Engel, J. L. Atwood, W. E. Hunter, Angew. Chem. 1983, 95, 506; Angew. Chem. Int. Ed. Engl. 1983, 22, 494; G. Erker, U. Dorf, Angew. Chem. 1983, 95, 800; Angew. Chem. Int. Ed. Engl. 1983, 22, 777; H. Yasuda, Y. Kajihara, K. Mashima, K. Nagasuna, A. Nakamura, Chem. Lett. 1981, 671; G. Erker, K. Engel, U. Dorf, J. L. Atwood, W. E. Hunter, Angew. Chem. 1982, 94, 915; Angew. Chem. Int. Ed. Engl. 1982, 21, 913; G. Erker, R. Lecht, Y.-H. Tsai, C. Krüger, Chem. Ber. 1987, 120, 1763; G. Erker, U. Dorf, R. Benn, R.-D. Reinhard, J. L. Petersen, J. Am. Chem. Soc. 1984, 106, 7649.
45. For additional related examples see e.g.: G. Erker, K. Engel, J. L. Atwood, W. E. Hunter, Angew. Chem. 1983, 95, 506; Angew. Chem. Int. Ed. Engl. 1983, 22, 494; G. Erker, U. Dorf, Angew. Chem. 1983, 95, 800; Angew. Chem. Int. Ed. Engl. 1983, 22, 777; H. Yasuda, Y. Kajihara, K. Mashima, K. Nagasuna, A. Nakamura, Chem. Lett. 1981, 671; G. Erker, K. Engel, U. Dorf, J. L. Atwood, W. E. Hunter, Angew. Chem. 1982, 94, 915; Angew. Chem. Int. Ed. Engl. 1982, 21, 913; G. Erker, R. Lecht, Y.-H. Tsai, C. Krüger, Chem. Ber. 1987, 120, 1763; G. Erker, U. Dorf, R. Benn, R.-D. Reinhard, J. L. Petersen, J. Am. Chem. Soc. 1984, 106, 7649.
46. For additional related examples see e.g.: G. Erker, K. Engel, J. L. Atwood, W. E. Hunter, Angew. Chem. 1983, 95, 506; Angew. Chem. Int. Ed. Engl. 1983, 22, 494; G. Erker, U. Dorf, Angew. Chem. 1983, 95, 800; Angew. Chem. Int. Ed. Engl. 1983, 22, 777; H. Yasuda, Y. Kajihara, K. Mashima, K. Nagasuna, A. Nakamura, Chem. Lett. 1981, 671; G. Erker, K. Engel, U. Dorf, J. L. Atwood, W. E. Hunter, Angew. Chem. 1982, 94, 915; Angew. Chem. Int. Ed. Engl. 1982, 21, 913; G. Erker, R. Lecht, Y.-H. Tsai, C. Krüger, Chem. Ber. 1987, 120, 1763; G. Erker, U. Dorf, R. Benn, R.-D. Reinhard, J. L. Petersen, J. Am. Chem. Soc. 1984, 106, 7649.
47. For additional related examples see e.g.: G. Erker, K. Engel, J. L. Atwood, W. E. Hunter, Angew. Chem. 1983, 95, 506; Angew. Chem. Int. Ed. Engl. 1983, 22, 494; G. Erker, U. Dorf, Angew. Chem. 1983, 95, 800; Angew. Chem. Int. Ed. Engl. 1983, 22, 777; H. Yasuda, Y. Kajihara, K. Mashima, K. Nagasuna, A. Nakamura, Chem. Lett. 1981, 671; G. Erker, K. Engel, U. Dorf, J. L. Atwood, W. E. Hunter, Angew. Chem. 1982, 94, 915; Angew. Chem. Int. Ed. Engl. 1982, 21, 913; G. Erker, R. Lecht, Y.-H. Tsai, C. Krüger, Chem. Ber. 1987, 120, 1763; G. Erker, U. Dorf, R. Benn, R.-D. Reinhard, J. L. Petersen, J. Am. Chem. Soc. 1984, 106, 7649.
48. For additional related examples see e.g.: G. Erker, K. Engel, J. L. Atwood, W. E. Hunter, Angew. Chem. 1983, 95, 506; Angew. Chem. Int. Ed. Engl. 1983, 22, 494; G. Erker, U. Dorf, Angew. Chem. 1983, 95, 800; Angew. Chem. Int. Ed. Engl. 1983, 22, 777; H. Yasuda, Y. Kajihara, K. Mashima, K. Nagasuna, A. Nakamura, Chem. Lett. 1981, 671; G. Erker, K. Engel, U. Dorf, J. L. Atwood, W. E. Hunter, Angew. Chem. 1982, 94, 915; Angew. Chem. Int. Ed. Engl. 1982, 21, 913; G. Erker, R. Lecht, Y.-H. Tsai, C. Krüger, Chem. Ber. 1987, 120, 1763; G. Erker, U. Dorf, R. Benn, R.-D. Reinhard, J. L. Petersen, J. Am. Chem. Soc. 1984, 106, 7649.
49. Programs used: (data collection) COLLECT: Nonius B. V. 1998; (data reduction) DENZO-SMN: Z. Otwinowski, W. Minor, Methods Enzymol. 1997, 276, 307-326; (absorption correction) SORTAV: R. H. Blessing, Acta Crystallogr. 1995, A51, 33-37; R. H. Blessing, J. Appl. Crystallogr. 1997, 30, 421-426; (structure solution) SHELXS-86 and SHELXS-97: G. M. Sheldrick, Acta Crystallogr. 1990, A46, 467-473; (structure refinement) SHELXL-97: G. M. Sheldrick, Universität Göttingen, 1997; (graphics) SCHAKAL: E. Keller, Universität Freiburg, 1997.
50. Programs used: (data collection) COLLECT: Nonius B. V. 1998; (data reduction) DENZO-SMN: Z. Otwinowski, W. Minor, Methods Enzymol. 1997, 276, 307-326; (absorption correction) SORTAV: R. H. Blessing, Acta Crystallogr. 1995, A51, 33-37; R. H. Blessing, J. Appl. Crystallogr. 1997, 30, 421-426; (structure solution) SHELXS-86 and SHELXS-97: G. M. Sheldrick, Acta Crystallogr. 1990, A46, 467-473; (structure refinement) SHELXL-97: G. M. Sheldrick, Universität Göttingen, 1997; (graphics) SCHAKAL: E. Keller, Universität Freiburg, 1997.
51. Programs used: (data collection) COLLECT: Nonius B. V. 1998; (data reduction) DENZO-SMN: Z. Otwinowski, W. Minor, Methods Enzymol. 1997, 276, 307-326; (absorption correction) SORTAV: R. H. Blessing, Acta Crystallogr. 1995, A51, 33-37; R. H. Blessing, J. Appl. Crystallogr. 1997, 30, 421-426; (structure solution) SHELXS-86 and SHELXS-97: G. M. Sheldrick, Acta Crystallogr. 1990, A46, 467-473; (structure refinement) SHELXL-97: G. M. Sheldrick, Universität Göttingen, 1997; (graphics) SCHAKAL: E. Keller, Universität Freiburg, 1997.
52. Programs used: (data collection) COLLECT: Nonius B. V. 1998; (data reduction) DENZO-SMN: Z. Otwinowski, W. Minor, Methods Enzymol. 1997, 276, 307-326; (absorption correction) SORTAV: R. H. Blessing, Acta Crystallogr. 1995, A51, 33-37; R. H. Blessing, J. Appl. Crystallogr. 1997, 30, 421-426; (structure solution) SHELXS-86 and SHELXS-97: G. M. Sheldrick, Acta Crystallogr. 1990, A46, 467-473; (structure refinement) SHELXL-97: G. M. Sheldrick, Universität Göttingen, 1997; (graphics) SCHAKAL: E. Keller, Universität Freiburg, 1997.