Structural Trends in Group 4 Metal Tetraaza Macrocycle Complexes. Molecular Structures of (Me4taen)Zr(OtBu)2 and (Me4taen)Hf(NMe2)2

Inorganic Chemistry

Volumn 36, Issue 1, 1997, Pages 103-108

  Black, David G ^a   Jordan, Richard F ^a   Rogers, Robin D ^b  

^a E11 SSH   (United States)

^b UNIVERSITY OF ALABAMA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0000309067     PISSN: 00201669     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (70)

1. 2) in the literature.
2. (a) Uhrhammer, R.; Black, D. G.; Gardner, T. G.; Olsen, J. D.; Jordan, R. F. J. Am. Chem. Soc. 1993, 115, 8493.
3. (b) Black, D. G.; Swenson, D. C.; Jordan, R. F. Organametallics 1995, 14, 3539.
4. 2- and related ligands see: (a) Truex, T. J.; Holm, R. H. J. Am. Chem. Soc. 1972, 94, 4529. (b) Tokumitsu, T.; Hayashi, T. Bull. Chem. Soc. Jpn. 1981, 54, 2348. (c) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1979, 18, 3145. (d) Brawner, S. A.; Lin, I. J. B.; Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1978, 17, 1304. (e) Tang, S. C.; Koch, S.; Weinstein, G. N.; Lane, R. W.; Holm, R. H. Inorg. Chem. 1973, 12, 2589. (f) Fujiwara, M.; Nakajima, Y.; Matsushita, T.; Shono, T. Polyhedron 1985, 4, 1589. (g) Fujiwara, M.; Matsushita, T.; Shono, T. Polyhedron 1984, 3, 1357. (h) Sakata, K.; Hashimoto, M.; Tagami, N.; Murakami, z. Bull. Chem. Soc. Jpn. 1980, 53, 2262. (i) Owston, P. G.; Peters, R.; Ramsammy, E.; Tasker, P. A.; Trotter, J. J. Chem. Soc., Chem. Commun. 1980, 1218. (j) Bamfield, P. J. Chem. Soc. A 1969, 2021. (k) Jäger, E.-G. Z. Chem. 1968, 8, 30. (l) Jäger, E.-G. Z. Chem. 1968, 8, 490. (m) Fujiwara, M.; Wakita, H.; Matsushita, T.; Shono, T. Bull. Chem. Soc. Jpn. 1990, 63, 3443. (n) Sakata, K.; Taziri, H.; Yamaura, F.; Hashoto, M. Synth. React. Inorg. Met.-Org. Chem. 1990, 20, 757. (o) Green, M.; Tasker, P. A. Inorg. Chim. Acta 1971, 5, 65. (p) Nishida, Y.; Osha, H.; Kida, S. Inorg. Chim. Acta 1978, 29, L191. (q) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1981, 20, 853. (r) Park, C. H.; Lee, B.; Everett, G. W., Jr. Inorg. Chem. 1982, 21, 1681.
5. 2- and related ligands see: (a) Truex, T. J.; Holm, R. H. J. Am. Chem. Soc. 1972, 94, 4529. (b) Tokumitsu, T.; Hayashi, T. Bull. Chem. Soc. Jpn. 1981, 54, 2348. (c) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1979, 18, 3145. (d) Brawner, S. A.; Lin, I. J. B.; Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1978, 17, 1304. (e) Tang, S. C.; Koch, S.; Weinstein, G. N.; Lane, R. W.; Holm, R. H. Inorg. Chem. 1973, 12, 2589. (f) Fujiwara, M.; Nakajima, Y.; Matsushita, T.; Shono, T. Polyhedron 1985, 4, 1589. (g) Fujiwara, M.; Matsushita, T.; Shono, T. Polyhedron 1984, 3, 1357. (h) Sakata, K.; Hashimoto, M.; Tagami, N.; Murakami, z. Bull. Chem. Soc. Jpn. 1980, 53, 2262. (i) Owston, P. G.; Peters, R.; Ramsammy, E.; Tasker, P. A.; Trotter, J. J. Chem. Soc., Chem. Commun. 1980, 1218. (j) Bamfield, P. J. Chem. Soc. A 1969, 2021. (k) Jäger, E.-G. Z. Chem. 1968, 8, 30. (l) Jäger, E.-G. Z. Chem. 1968, 8, 490. (m) Fujiwara, M.; Wakita, H.; Matsushita, T.; Shono, T. Bull. Chem. Soc. Jpn. 1990, 63, 3443. (n) Sakata, K.; Taziri, H.; Yamaura, F.; Hashoto, M. Synth. React. Inorg. Met.-Org. Chem. 1990, 20, 757. (o) Green, M.; Tasker, P. A. Inorg. Chim. Acta 1971, 5, 65. (p) Nishida, Y.; Osha, H.; Kida, S. Inorg. Chim. Acta 1978, 29, L191. (q) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1981, 20, 853. (r) Park, C. H.; Lee, B.; Everett, G. W., Jr. Inorg. Chem. 1982, 21, 1681.
6. 2- and related ligands see: (a) Truex, T. J.; Holm, R. H. J. Am. Chem. Soc. 1972, 94, 4529. (b) Tokumitsu, T.; Hayashi, T. Bull. Chem. Soc. Jpn. 1981, 54, 2348. (c) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1979, 18, 3145. (d) Brawner, S. A.; Lin, I. J. B.; Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1978, 17, 1304. (e) Tang, S. C.; Koch, S.; Weinstein, G. N.; Lane, R. W.; Holm, R. H. Inorg. Chem. 1973, 12, 2589. (f) Fujiwara, M.; Nakajima, Y.; Matsushita, T.; Shono, T. Polyhedron 1985, 4, 1589. (g) Fujiwara, M.; Matsushita, T.; Shono, T. Polyhedron 1984, 3, 1357. (h) Sakata, K.; Hashimoto, M.; Tagami, N.; Murakami, z. Bull. Chem. Soc. Jpn. 1980, 53, 2262. (i) Owston, P. G.; Peters, R.; Ramsammy, E.; Tasker, P. A.; Trotter, J. J. Chem. Soc., Chem. Commun. 1980, 1218. (j) Bamfield, P. J. Chem. Soc. A 1969, 2021. (k) Jäger, E.-G. Z. Chem. 1968, 8, 30. (l) Jäger, E.-G. Z. Chem. 1968, 8, 490. (m) Fujiwara, M.; Wakita, H.; Matsushita, T.; Shono, T. Bull. Chem. Soc. Jpn. 1990, 63, 3443. (n) Sakata, K.; Taziri, H.; Yamaura, F.; Hashoto, M. Synth. React. Inorg. Met.-Org. Chem. 1990, 20, 757. (o) Green, M.; Tasker, P. A. Inorg. Chim. Acta 1971, 5, 65. (p) Nishida, Y.; Osha, H.; Kida, S. Inorg. Chim. Acta 1978, 29, L191. (q) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1981, 20, 853. (r) Park, C. H.; Lee, B.; Everett, G. W., Jr. Inorg. Chem. 1982, 21, 1681.
7. 2- and related ligands see: (a) Truex, T. J.; Holm, R. H. J. Am. Chem. Soc. 1972, 94, 4529. (b) Tokumitsu, T.; Hayashi, T. Bull. Chem. Soc. Jpn. 1981, 54, 2348. (c) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1979, 18, 3145. (d) Brawner, S. A.; Lin, I. J. B.; Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1978, 17, 1304. (e) Tang, S. C.; Koch, S.; Weinstein, G. N.; Lane, R. W.; Holm, R. H. Inorg. Chem. 1973, 12, 2589. (f) Fujiwara, M.; Nakajima, Y.; Matsushita, T.; Shono, T. Polyhedron 1985, 4, 1589. (g) Fujiwara, M.; Matsushita, T.; Shono, T. Polyhedron 1984, 3, 1357. (h) Sakata, K.; Hashimoto, M.; Tagami, N.; Murakami, z. Bull. Chem. Soc. Jpn. 1980, 53, 2262. (i) Owston, P. G.; Peters, R.; Ramsammy, E.; Tasker, P. A.; Trotter, J. J. Chem. Soc., Chem. Commun. 1980, 1218. (j) Bamfield, P. J. Chem. Soc. A 1969, 2021. (k) Jäger, E.-G. Z. Chem. 1968, 8, 30. (l) Jäger, E.-G. Z. Chem. 1968, 8, 490. (m) Fujiwara, M.; Wakita, H.; Matsushita, T.; Shono, T. Bull. Chem. Soc. Jpn. 1990, 63, 3443. (n) Sakata, K.; Taziri, H.; Yamaura, F.; Hashoto, M. Synth. React. Inorg. Met.-Org. Chem. 1990, 20, 757. (o) Green, M.; Tasker, P. A. Inorg. Chim. Acta 1971, 5, 65. (p) Nishida, Y.; Osha, H.; Kida, S. Inorg. Chim. Acta 1978, 29, L191. (q) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1981, 20, 853. (r) Park, C. H.; Lee, B.; Everett, G. W., Jr. Inorg. Chem. 1982, 21, 1681.
8. 2- and related ligands see: (a) Truex, T. J.; Holm, R. H. J. Am. Chem. Soc. 1972, 94, 4529. (b) Tokumitsu, T.; Hayashi, T. Bull. Chem. Soc. Jpn. 1981, 54, 2348. (c) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1979, 18, 3145. (d) Brawner, S. A.; Lin, I. J. B.; Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1978, 17, 1304. (e) Tang, S. C.; Koch, S.; Weinstein, G. N.; Lane, R. W.; Holm, R. H. Inorg. Chem. 1973, 12, 2589. (f) Fujiwara, M.; Nakajima, Y.; Matsushita, T.; Shono, T. Polyhedron 1985, 4, 1589. (g) Fujiwara, M.; Matsushita, T.; Shono, T. Polyhedron 1984, 3, 1357. (h) Sakata, K.; Hashimoto, M.; Tagami, N.; Murakami, z. Bull. Chem. Soc. Jpn. 1980, 53, 2262. (i) Owston, P. G.; Peters, R.; Ramsammy, E.; Tasker, P. A.; Trotter, J. J. Chem. Soc., Chem. Commun. 1980, 1218. (j) Bamfield, P. J. Chem. Soc. A 1969, 2021. (k) Jäger, E.-G. Z. Chem. 1968, 8, 30. (l) Jäger, E.-G. Z. Chem. 1968, 8, 490. (m) Fujiwara, M.; Wakita, H.; Matsushita, T.; Shono, T. Bull. Chem. Soc. Jpn. 1990, 63, 3443. (n) Sakata, K.; Taziri, H.; Yamaura, F.; Hashoto, M. Synth. React. Inorg. Met.-Org. Chem. 1990, 20, 757. (o) Green, M.; Tasker, P. A. Inorg. Chim. Acta 1971, 5, 65. (p) Nishida, Y.; Osha, H.; Kida, S. Inorg. Chim. Acta 1978, 29, L191. (q) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1981, 20, 853. (r) Park, C. H.; Lee, B.; Everett, G. W., Jr. Inorg. Chem. 1982, 21, 1681.
9. 2- and related ligands see: (a) Truex, T. J.; Holm, R. H. J. Am. Chem. Soc. 1972, 94, 4529. (b) Tokumitsu, T.; Hayashi, T. Bull. Chem. Soc. Jpn. 1981, 54, 2348. (c) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1979, 18, 3145. (d) Brawner, S. A.; Lin, I. J. B.; Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1978, 17, 1304. (e) Tang, S. C.; Koch, S.; Weinstein, G. N.; Lane, R. W.; Holm, R. H. Inorg. Chem. 1973, 12, 2589. (f) Fujiwara, M.; Nakajima, Y.; Matsushita, T.; Shono, T. Polyhedron 1985, 4, 1589. (g) Fujiwara, M.; Matsushita, T.; Shono, T. Polyhedron 1984, 3, 1357. (h) Sakata, K.; Hashimoto, M.; Tagami, N.; Murakami, z. Bull. Chem. Soc. Jpn. 1980, 53, 2262. (i) Owston, P. G.; Peters, R.; Ramsammy, E.; Tasker, P. A.; Trotter, J. J. Chem. Soc., Chem. Commun. 1980, 1218. (j) Bamfield, P. J. Chem. Soc. A 1969, 2021. (k) Jäger, E.-G. Z. Chem. 1968, 8, 30. (l) Jäger, E.-G. Z. Chem. 1968, 8, 490. (m) Fujiwara, M.; Wakita, H.; Matsushita, T.; Shono, T. Bull. Chem. Soc. Jpn. 1990, 63, 3443. (n) Sakata, K.; Taziri, H.; Yamaura, F.; Hashoto, M. Synth. React. Inorg. Met.-Org. Chem. 1990, 20, 757. (o) Green, M.; Tasker, P. A. Inorg. Chim. Acta 1971, 5, 65. (p) Nishida, Y.; Osha, H.; Kida, S. Inorg. Chim. Acta 1978, 29, L191. (q) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1981, 20, 853. (r) Park, C. H.; Lee, B.; Everett, G. W., Jr. Inorg. Chem. 1982, 21, 1681.
10. 2- and related ligands see: (a) Truex, T. J.; Holm, R. H. J. Am. Chem. Soc. 1972, 94, 4529. (b) Tokumitsu, T.; Hayashi, T. Bull. Chem. Soc. Jpn. 1981, 54, 2348. (c) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1979, 18, 3145. (d) Brawner, S. A.; Lin, I. J. B.; Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1978, 17, 1304. (e) Tang, S. C.; Koch, S.; Weinstein, G. N.; Lane, R. W.; Holm, R. H. Inorg. Chem. 1973, 12, 2589. (f) Fujiwara, M.; Nakajima, Y.; Matsushita, T.; Shono, T. Polyhedron 1985, 4, 1589. (g) Fujiwara, M.; Matsushita, T.; Shono, T. Polyhedron 1984, 3, 1357. (h) Sakata, K.; Hashimoto, M.; Tagami, N.; Murakami, z. Bull. Chem. Soc. Jpn. 1980, 53, 2262. (i) Owston, P. G.; Peters, R.; Ramsammy, E.; Tasker, P. A.; Trotter, J. J. Chem. Soc., Chem. Commun. 1980, 1218. (j) Bamfield, P. J. Chem. Soc. A 1969, 2021. (k) Jäger, E.-G. Z. Chem. 1968, 8, 30. (l) Jäger, E.-G. Z. Chem. 1968, 8, 490. (m) Fujiwara, M.; Wakita, H.; Matsushita, T.; Shono, T. Bull. Chem. Soc. Jpn. 1990, 63, 3443. (n) Sakata, K.; Taziri, H.; Yamaura, F.; Hashoto, M. Synth. React. Inorg. Met.-Org. Chem. 1990, 20, 757. (o) Green, M.; Tasker, P. A. Inorg. Chim. Acta 1971, 5, 65. (p) Nishida, Y.; Osha, H.; Kida, S. Inorg. Chim. Acta 1978, 29, L191. (q) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1981, 20, 853. (r) Park, C. H.; Lee, B.; Everett, G. W., Jr. Inorg. Chem. 1982, 21, 1681.
11. 2- and related ligands see: (a) Truex, T. J.; Holm, R. H. J. Am. Chem. Soc. 1972, 94, 4529. (b) Tokumitsu, T.; Hayashi, T. Bull. Chem. Soc. Jpn. 1981, 54, 2348. (c) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1979, 18, 3145. (d) Brawner, S. A.; Lin, I. J. B.; Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1978, 17, 1304. (e) Tang, S. C.; Koch, S.; Weinstein, G. N.; Lane, R. W.; Holm, R. H. Inorg. Chem. 1973, 12, 2589. (f) Fujiwara, M.; Nakajima, Y.; Matsushita, T.; Shono, T. Polyhedron 1985, 4, 1589. (g) Fujiwara, M.; Matsushita, T.; Shono, T. Polyhedron 1984, 3, 1357. (h) Sakata, K.; Hashimoto, M.; Tagami, N.; Murakami, z. Bull. Chem. Soc. Jpn. 1980, 53, 2262. (i) Owston, P. G.; Peters, R.; Ramsammy, E.; Tasker, P. A.; Trotter, J. J. Chem. Soc., Chem. Commun. 1980, 1218. (j) Bamfield, P. J. Chem. Soc. A 1969, 2021. (k) Jäger, E.-G. Z. Chem. 1968, 8, 30. (l) Jäger, E.-G. Z. Chem. 1968, 8, 490. (m) Fujiwara, M.; Wakita, H.; Matsushita, T.; Shono, T. Bull. Chem. Soc. Jpn. 1990, 63, 3443. (n) Sakata, K.; Taziri, H.; Yamaura, F.; Hashoto, M. Synth. React. Inorg. Met.-Org. Chem. 1990, 20, 757. (o) Green, M.; Tasker, P. A. Inorg. Chim. Acta 1971, 5, 65. (p) Nishida, Y.; Osha, H.; Kida, S. Inorg. Chim. Acta 1978, 29, L191. (q) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1981, 20, 853. (r) Park, C. H.; Lee, B.; Everett, G. W., Jr. Inorg. Chem. 1982, 21, 1681.
12. 2- and related ligands see: (a) Truex, T. J.; Holm, R. H. J. Am. Chem. Soc. 1972, 94, 4529. (b) Tokumitsu, T.; Hayashi, T. Bull. Chem. Soc. Jpn. 1981, 54, 2348. (c) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1979, 18, 3145. (d) Brawner, S. A.; Lin, I. J. B.; Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1978, 17, 1304. (e) Tang, S. C.; Koch, S.; Weinstein, G. N.; Lane, R. W.; Holm, R. H. Inorg. Chem. 1973, 12, 2589. (f) Fujiwara, M.; Nakajima, Y.; Matsushita, T.; Shono, T. Polyhedron 1985, 4, 1589. (g) Fujiwara, M.; Matsushita, T.; Shono, T. Polyhedron 1984, 3, 1357. (h) Sakata, K.; Hashimoto, M.; Tagami, N.; Murakami, z. Bull. Chem. Soc. Jpn. 1980, 53, 2262. (i) Owston, P. G.; Peters, R.; Ramsammy, E.; Tasker, P. A.; Trotter, J. J. Chem. Soc., Chem. Commun. 1980, 1218. (j) Bamfield, P. J. Chem. Soc. A 1969, 2021. (k) Jäger, E.-G. Z. Chem. 1968, 8, 30. (l) Jäger, E.-G. Z. Chem. 1968, 8, 490. (m) Fujiwara, M.; Wakita, H.; Matsushita, T.; Shono, T. Bull. Chem. Soc. Jpn. 1990, 63, 3443. (n) Sakata, K.; Taziri, H.; Yamaura, F.; Hashoto, M. Synth. React. Inorg. Met.-Org. Chem. 1990, 20, 757. (o) Green, M.; Tasker, P. A. Inorg. Chim. Acta 1971, 5, 65. (p) Nishida, Y.; Osha, H.; Kida, S. Inorg. Chim. Acta 1978, 29, L191. (q) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1981, 20, 853. (r) Park, C. H.; Lee, B.; Everett, G. W., Jr. Inorg. Chem. 1982, 21, 1681.
13. 2- and related ligands see: (a) Truex, T. J.; Holm, R. H. J. Am. Chem. Soc. 1972, 94, 4529. (b) Tokumitsu, T.; Hayashi, T. Bull. Chem. Soc. Jpn. 1981, 54, 2348. (c) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1979, 18, 3145. (d) Brawner, S. A.; Lin, I. J. B.; Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1978, 17, 1304. (e) Tang, S. C.; Koch, S.; Weinstein, G. N.; Lane, R. W.; Holm, R. H. Inorg. Chem. 1973, 12, 2589. (f) Fujiwara, M.; Nakajima, Y.; Matsushita, T.; Shono, T. Polyhedron 1985, 4, 1589. (g) Fujiwara, M.; Matsushita, T.; Shono, T. Polyhedron 1984, 3, 1357. (h) Sakata, K.; Hashimoto, M.; Tagami, N.; Murakami, z. Bull. Chem. Soc. Jpn. 1980, 53, 2262. (i) Owston, P. G.; Peters, R.; Ramsammy, E.; Tasker, P. A.; Trotter, J. J. Chem. Soc., Chem. Commun. 1980, 1218. (j) Bamfield, P. J. Chem. Soc. A 1969, 2021. (k) Jäger, E.-G. Z. Chem. 1968, 8, 30. (l) Jäger, E.-G. Z. Chem. 1968, 8, 490. (m) Fujiwara, M.; Wakita, H.; Matsushita, T.; Shono, T. Bull. Chem. Soc. Jpn. 1990, 63, 3443. (n) Sakata, K.; Taziri, H.; Yamaura, F.; Hashoto, M. Synth. React. Inorg. Met.-Org. Chem. 1990, 20, 757. (o) Green, M.; Tasker, P. A. Inorg. Chim. Acta 1971, 5, 65. (p) Nishida, Y.; Osha, H.; Kida, S. Inorg. Chim. Acta 1978, 29, L191. (q) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1981, 20, 853. (r) Park, C. H.; Lee, B.; Everett, G. W., Jr. Inorg. Chem. 1982, 21, 1681.
14. 2- and related ligands see: (a) Truex, T. J.; Holm, R. H. J. Am. Chem. Soc. 1972, 94, 4529. (b) Tokumitsu, T.; Hayashi, T. Bull. Chem. Soc. Jpn. 1981, 54, 2348. (c) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1979, 18, 3145. (d) Brawner, S. A.; Lin, I. J. B.; Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1978, 17, 1304. (e) Tang, S. C.; Koch, S.; Weinstein, G. N.; Lane, R. W.; Holm, R. H. Inorg. Chem. 1973, 12, 2589. (f) Fujiwara, M.; Nakajima, Y.; Matsushita, T.; Shono, T. Polyhedron 1985, 4, 1589. (g) Fujiwara, M.; Matsushita, T.; Shono, T. Polyhedron 1984, 3, 1357. (h) Sakata, K.; Hashimoto, M.; Tagami, N.; Murakami, z. Bull. Chem. Soc. Jpn. 1980, 53, 2262. (i) Owston, P. G.; Peters, R.; Ramsammy, E.; Tasker, P. A.; Trotter, J. J. Chem. Soc., Chem. Commun. 1980, 1218. (j) Bamfield, P. J. Chem. Soc. A 1969, 2021. (k) Jäger, E.-G. Z. Chem. 1968, 8, 30. (l) Jäger, E.-G. Z. Chem. 1968, 8, 490. (m) Fujiwara, M.; Wakita, H.; Matsushita, T.; Shono, T. Bull. Chem. Soc. Jpn. 1990, 63, 3443. (n) Sakata, K.; Taziri, H.; Yamaura, F.; Hashoto, M. Synth. React. Inorg. Met.-Org. Chem. 1990, 20, 757. (o) Green, M.; Tasker, P. A. Inorg. Chim. Acta 1971, 5, 65. (p) Nishida, Y.; Osha, H.; Kida, S. Inorg. Chim. Acta 1978, 29, L191. (q) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1981, 20, 853. (r) Park, C. H.; Lee, B.; Everett, G. W., Jr. Inorg. Chem. 1982, 21, 1681.
15. 2- and related ligands see: (a) Truex, T. J.; Holm, R. H. J. Am. Chem. Soc. 1972, 94, 4529. (b) Tokumitsu, T.; Hayashi, T. Bull. Chem. Soc. Jpn. 1981, 54, 2348. (c) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1979, 18, 3145. (d) Brawner, S. A.; Lin, I. J. B.; Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1978, 17, 1304. (e) Tang, S. C.; Koch, S.; Weinstein, G. N.; Lane, R. W.; Holm, R. H. Inorg. Chem. 1973, 12, 2589. (f) Fujiwara, M.; Nakajima, Y.; Matsushita, T.; Shono, T. Polyhedron 1985, 4, 1589. (g) Fujiwara, M.; Matsushita, T.; Shono, T. Polyhedron 1984, 3, 1357. (h) Sakata, K.; Hashimoto, M.; Tagami, N.; Murakami, z. Bull. Chem. Soc. Jpn. 1980, 53, 2262. (i) Owston, P. G.; Peters, R.; Ramsammy, E.; Tasker, P. A.; Trotter, J. J. Chem. Soc., Chem. Commun. 1980, 1218. (j) Bamfield, P. J. Chem. Soc. A 1969, 2021. (k) Jäger, E.-G. Z. Chem. 1968, 8, 30. (l) Jäger, E.-G. Z. Chem. 1968, 8, 490. (m) Fujiwara, M.; Wakita, H.; Matsushita, T.; Shono, T. Bull. Chem. Soc. Jpn. 1990, 63, 3443. (n) Sakata, K.; Taziri, H.; Yamaura, F.; Hashoto, M. Synth. React. Inorg. Met.-Org. Chem. 1990, 20, 757. (o) Green, M.; Tasker, P. A. Inorg. Chim. Acta 1971, 5, 65. (p) Nishida, Y.; Osha, H.; Kida, S. Inorg. Chim. Acta 1978, 29, L191. (q) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1981, 20, 853. (r) Park, C. H.; Lee, B.; Everett, G. W., Jr. Inorg. Chem. 1982, 21, 1681.
16. 2- and related ligands see: (a) Truex, T. J.; Holm, R. H. J. Am. Chem. Soc. 1972, 94, 4529. (b) Tokumitsu, T.; Hayashi, T. Bull. Chem. Soc. Jpn. 1981, 54, 2348. (c) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1979, 18, 3145. (d) Brawner, S. A.; Lin, I. J. B.; Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1978, 17, 1304. (e) Tang, S. C.; Koch, S.; Weinstein, G. N.; Lane, R. W.; Holm, R. H. Inorg. Chem. 1973, 12, 2589. (f) Fujiwara, M.; Nakajima, Y.; Matsushita, T.; Shono, T. Polyhedron 1985, 4, 1589. (g) Fujiwara, M.; Matsushita, T.; Shono, T. Polyhedron 1984, 3, 1357. (h) Sakata, K.; Hashimoto, M.; Tagami, N.; Murakami, z. Bull. Chem. Soc. Jpn. 1980, 53, 2262. (i) Owston, P. G.; Peters, R.; Ramsammy, E.; Tasker, P. A.; Trotter, J. J. Chem. Soc., Chem. Commun. 1980, 1218. (j) Bamfield, P. J. Chem. Soc. A 1969, 2021. (k) Jäger, E.-G. Z. Chem. 1968, 8, 30. (l) Jäger, E.-G. Z. Chem. 1968, 8, 490. (m) Fujiwara, M.; Wakita, H.; Matsushita, T.; Shono, T. Bull. Chem. Soc. Jpn. 1990, 63, 3443. (n) Sakata, K.; Taziri, H.; Yamaura, F.; Hashoto, M. Synth. React. Inorg. Met.-Org. Chem. 1990, 20, 757. (o) Green, M.; Tasker, P. A. Inorg. Chim. Acta 1971, 5, 65. (p) Nishida, Y.; Osha, H.; Kida, S. Inorg. Chim. Acta 1978, 29, L191. (q) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1981, 20, 853. (r) Park, C. H.; Lee, B.; Everett, G. W., Jr. Inorg. Chem. 1982, 21, 1681.
17. 2- and related ligands see: (a) Truex, T. J.; Holm, R. H. J. Am. Chem. Soc. 1972, 94, 4529. (b) Tokumitsu, T.; Hayashi, T. Bull. Chem. Soc. Jpn. 1981, 54, 2348. (c) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1979, 18, 3145. (d) Brawner, S. A.; Lin, I. J. B.; Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1978, 17, 1304. (e) Tang, S. C.; Koch, S.; Weinstein, G. N.; Lane, R. W.; Holm, R. H. Inorg. Chem. 1973, 12, 2589. (f) Fujiwara, M.; Nakajima, Y.; Matsushita, T.; Shono, T. Polyhedron 1985, 4, 1589. (g) Fujiwara, M.; Matsushita, T.; Shono, T. Polyhedron 1984, 3, 1357. (h) Sakata, K.; Hashimoto, M.; Tagami, N.; Murakami, z. Bull. Chem. Soc. Jpn. 1980, 53, 2262. (i) Owston, P. G.; Peters, R.; Ramsammy, E.; Tasker, P. A.; Trotter, J. J. Chem. Soc., Chem. Commun. 1980, 1218. (j) Bamfield, P. J. Chem. Soc. A 1969, 2021. (k) Jäger, E.-G. Z. Chem. 1968, 8, 30. (l) Jäger, E.-G. Z. Chem. 1968, 8, 490. (m) Fujiwara, M.; Wakita, H.; Matsushita, T.; Shono, T. Bull. Chem. Soc. Jpn. 1990, 63, 3443. (n) Sakata, K.; Taziri, H.; Yamaura, F.; Hashoto, M. Synth. React. Inorg. Met.-Org. Chem. 1990, 20, 757. (o) Green, M.; Tasker, P. A. Inorg. Chim. Acta 1971, 5, 65. (p) Nishida, Y.; Osha, H.; Kida, S. Inorg. Chim. Acta 1978, 29, L191. (q) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1981, 20, 853. (r) Park, C. H.; Lee, B.; Everett, G. W., Jr. Inorg. Chem. 1982, 21, 1681.
18. 2- and related ligands see: (a) Truex, T. J.; Holm, R. H. J. Am. Chem. Soc. 1972, 94, 4529. (b) Tokumitsu, T.; Hayashi, T. Bull. Chem. Soc. Jpn. 1981, 54, 2348. (c) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1979, 18, 3145. (d) Brawner, S. A.; Lin, I. J. B.; Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1978, 17, 1304. (e) Tang, S. C.; Koch, S.; Weinstein, G. N.; Lane, R. W.; Holm, R. H. Inorg. Chem. 1973, 12, 2589. (f) Fujiwara, M.; Nakajima, Y.; Matsushita, T.; Shono, T. Polyhedron 1985, 4, 1589. (g) Fujiwara, M.; Matsushita, T.; Shono, T. Polyhedron 1984, 3, 1357. (h) Sakata, K.; Hashimoto, M.; Tagami, N.; Murakami, z. Bull. Chem. Soc. Jpn. 1980, 53, 2262. (i) Owston, P. G.; Peters, R.; Ramsammy, E.; Tasker, P. A.; Trotter, J. J. Chem. Soc., Chem. Commun. 1980, 1218. (j) Bamfield, P. J. Chem. Soc. A 1969, 2021. (k) Jäger, E.-G. Z. Chem. 1968, 8, 30. (l) Jäger, E.-G. Z. Chem. 1968, 8, 490. (m) Fujiwara, M.; Wakita, H.; Matsushita, T.; Shono, T. Bull. Chem. Soc. Jpn. 1990, 63, 3443. (n) Sakata, K.; Taziri, H.; Yamaura, F.; Hashoto, M. Synth. React. Inorg. Met.-Org. Chem. 1990, 20, 757. (o) Green, M.; Tasker, P. A. Inorg. Chim. Acta 1971, 5, 65. (p) Nishida, Y.; Osha, H.; Kida, S. Inorg. Chim. Acta 1978, 29, L191. (q) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1981, 20, 853. (r) Park, C. H.; Lee, B.; Everett, G. W., Jr. Inorg. Chem. 1982, 21, 1681.
19. 2- and related ligands see: (a) Truex, T. J.; Holm, R. H. J. Am. Chem. Soc. 1972, 94, 4529. (b) Tokumitsu, T.; Hayashi, T. Bull. Chem. Soc. Jpn. 1981, 54, 2348. (c) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1979, 18, 3145. (d) Brawner, S. A.; Lin, I. J. B.; Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1978, 17, 1304. (e) Tang, S. C.; Koch, S.; Weinstein, G. N.; Lane, R. W.; Holm, R. H. Inorg. Chem. 1973, 12, 2589. (f) Fujiwara, M.; Nakajima, Y.; Matsushita, T.; Shono, T. Polyhedron 1985, 4, 1589. (g) Fujiwara, M.; Matsushita, T.; Shono, T. Polyhedron 1984, 3, 1357. (h) Sakata, K.; Hashimoto, M.; Tagami, N.; Murakami, z. Bull. Chem. Soc. Jpn. 1980, 53, 2262. (i) Owston, P. G.; Peters, R.; Ramsammy, E.; Tasker, P. A.; Trotter, J. J. Chem. Soc., Chem. Commun. 1980, 1218. (j) Bamfield, P. J. Chem. Soc. A 1969, 2021. (k) Jäger, E.-G. Z. Chem. 1968, 8, 30. (l) Jäger, E.-G. Z. Chem. 1968, 8, 490. (m) Fujiwara, M.; Wakita, H.; Matsushita, T.; Shono, T. Bull. Chem. Soc. Jpn. 1990, 63, 3443. (n) Sakata, K.; Taziri, H.; Yamaura, F.; Hashoto, M. Synth. React. Inorg. Met.-Org. Chem. 1990, 20, 757. (o) Green, M.; Tasker, P. A. Inorg. Chim. Acta 1971, 5, 65. (p) Nishida, Y.; Osha, H.; Kida, S. Inorg. Chim. Acta 1978, 29, L191. (q) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1981, 20, 853. (r) Park, C. H.; Lee, B.; Everett, G. W., Jr. Inorg. Chem. 1982, 21, 1681.
20. 2- and related ligands see: (a) Truex, T. J.; Holm, R. H. J. Am. Chem. Soc. 1972, 94, 4529. (b) Tokumitsu, T.; Hayashi, T. Bull. Chem. Soc. Jpn. 1981, 54, 2348. (c) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1979, 18, 3145. (d) Brawner, S. A.; Lin, I. J. B.; Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1978, 17, 1304. (e) Tang, S. C.; Koch, S.; Weinstein, G. N.; Lane, R. W.; Holm, R. H. Inorg. Chem. 1973, 12, 2589. (f) Fujiwara, M.; Nakajima, Y.; Matsushita, T.; Shono, T. Polyhedron 1985, 4, 1589. (g) Fujiwara, M.; Matsushita, T.; Shono, T. Polyhedron 1984, 3, 1357. (h) Sakata, K.; Hashimoto, M.; Tagami, N.; Murakami, z. Bull. Chem. Soc. Jpn. 1980, 53, 2262. (i) Owston, P. G.; Peters, R.; Ramsammy, E.; Tasker, P. A.; Trotter, J. J. Chem. Soc., Chem. Commun. 1980, 1218. (j) Bamfield, P. J. Chem. Soc. A 1969, 2021. (k) Jäger, E.-G. Z. Chem. 1968, 8, 30. (l) Jäger, E.-G. Z. Chem. 1968, 8, 490. (m) Fujiwara, M.; Wakita, H.; Matsushita, T.; Shono, T. Bull. Chem. Soc. Jpn. 1990, 63, 3443. (n) Sakata, K.; Taziri, H.; Yamaura, F.; Hashoto, M. Synth. React. Inorg. Met.-Org. Chem. 1990, 20, 757. (o) Green, M.; Tasker, P. A. Inorg. Chim. Acta 1971, 5, 65. (p) Nishida, Y.; Osha, H.; Kida, S. Inorg. Chim. Acta 1978, 29, L191. (q) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1981, 20, 853. (r) Park, C. H.; Lee, B.; Everett, G. W., Jr. Inorg. Chem. 1982, 21, 1681.
21. 2- and related ligands see: (a) Truex, T. J.; Holm, R. H. J. Am. Chem. Soc. 1972, 94, 4529. (b) Tokumitsu, T.; Hayashi, T. Bull. Chem. Soc. Jpn. 1981, 54, 2348. (c) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1979, 18, 3145. (d) Brawner, S. A.; Lin, I. J. B.; Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1978, 17, 1304. (e) Tang, S. C.; Koch, S.; Weinstein, G. N.; Lane, R. W.; Holm, R. H. Inorg. Chem. 1973, 12, 2589. (f) Fujiwara, M.; Nakajima, Y.; Matsushita, T.; Shono, T. Polyhedron 1985, 4, 1589. (g) Fujiwara, M.; Matsushita, T.; Shono, T. Polyhedron 1984, 3, 1357. (h) Sakata, K.; Hashimoto, M.; Tagami, N.; Murakami, z. Bull. Chem. Soc. Jpn. 1980, 53, 2262. (i) Owston, P. G.; Peters, R.; Ramsammy, E.; Tasker, P. A.; Trotter, J. J. Chem. Soc., Chem. Commun. 1980, 1218. (j) Bamfield, P. J. Chem. Soc. A 1969, 2021. (k) Jäger, E.-G. Z. Chem. 1968, 8, 30. (l) Jäger, E.-G. Z. Chem. 1968, 8, 490. (m) Fujiwara, M.; Wakita, H.; Matsushita, T.; Shono, T. Bull. Chem. Soc. Jpn. 1990, 63, 3443. (n) Sakata, K.; Taziri, H.; Yamaura, F.; Hashoto, M. Synth. React. Inorg. Met.-Org. Chem. 1990, 20, 757. (o) Green, M.; Tasker, P. A. Inorg. Chim. Acta 1971, 5, 65. (p) Nishida, Y.; Osha, H.; Kida, S. Inorg. Chim. Acta 1978, 29, L191. (q) Kim, J.-H.; Everett, G. W., Jr. Inorg. Chem. 1981, 20, 853. (r) Park, C. H.; Lee, B.; Everett, G. W., Jr. Inorg. Chem. 1982, 21, 1681.
22. (a) Gillespie, R. J.; Nyholm, R. S. Q. Rev. Chem. Soc. 1957, 11, 339.
23. (b) Gillespie, R. J. Molecular Geometry; van Nostrand-Reinhold: London, 1972.
24. (c) Gillespie, R. J.; Hargittai, I. The VSEPR Model of Molecular Geometry; Allyn and Bacon: Boston, 1991.
25. Morse, P. M.; Girolami, G. S. J. Am. Chem. Soc. 1089, 111, 4114.
26. (a) Pfennig, V.; Scppelt, K. Science 1996, 271, 626.
27. (b) Haaland, A.; Hammel, A.; Rypdal, K.; Volden, H. V. J. Am. Chem. Soc. 1990. 112, 4547.
28. (a) Kang, S. K.; Albright, T. A.; Eisenstein, O. Inorg. Chem. 1989, 28, 1611.
29. (b) Demolliens, A.; Jean, Y.; Eisenstein, O. Organometallics 1986, 5, 1457.
30. (c) Hoffmann, R.; Howell, J. M.; Rossi, A. R. J. Am. Chem. Soc. 1976, 98, 2484,
31. (d) Kang, S. K.; Tang, H.; Albright, T. A. J. Am. Chem. Soc. 1993, 115, 1971.
32. (e) Kaupp, M. J. Am. Chem. Soc. 1996, 118, 3018.
33. (f) Shen, M.; Schaefer, H. F.; Partridge, H. J. Chem. Phys. 1993, 98, 508.
34. (g) Jonas, V.; Frenking, G.; Gauss, J. Chem. Phys. Lett. 1992, 194, 109.
35. Hagen, K. L.; Holwill, C. J.; Rice, D. A.; Runnacles, J. D. Acta Chem. Scand. 1988, A42, 578.
36. Haaland, A.; Rypdal, K.; Volden, H. V.; Jacob, E.; Weidlein, J. Acta Chem. Scand. 1989, 43, 911.
37. Seip, H. M.; Seip, R. Acta Chem. Scand. 1966, 20, 2698.
38. -, See for example:, (a) Poulton, J. T.; Foltng, K.; Streib, W. E.; Caulton, K. G. Inorg. Chem. 1992, 31, 3190. (b) Marsella, J. A.; Moloy, K. G.; Caulton, K. G. J. Organometallic Chem. 1980, 201, 389. (c) Huffman, J. C.; Moloy, K. G.; Marsella, J. A.; Caulton, K. G. J. Am. Chem. Soc. 1980, 102, 3009.
39. -, See for example:, (a) Poulton, J. T.; Foltng, K.; Streib, W. E.; Caulton, K. G. Inorg. Chem. 1992, 31, 3190. (b) Marsella, J. A.; Moloy, K. G.; Caulton, K. G. J. Organometallic Chem. 1980, 201, 389. (c) Huffman, J. C.; Moloy, K. G.; Marsella, J. A.; Caulton, K. G. J. Am. Chem. Soc. 1980, 102, 3009.
40. -, See for example:, (a) Poulton, J. T.; Foltng, K.; Streib, W. E.; Caulton, K. G. Inorg. Chem. 1992, 31, 3190. (b) Marsella, J. A.; Moloy, K. G.; Caulton, K. G. J. Organometallic Chem. 1980, 201, 389. (c) Huffman, J. C.; Moloy, K. G.; Marsella, J. A.; Caulton, K. G. J. Am. Chem. Soc. 1980, 102, 3009.
41. (a) Schock, L. E.; Marks, T. J. J. Am. Chem. Soc. 1988, 110, 7701.
42. (b) Ziegler, T.; Tschinke, V.; Versluis, L.; Baerends, E. V.; Ravenek, W. Polyhedron 1988, 7, 1625.
43. (c) Lappert, M. F.; Patil, D. S.; Pedley, J. B. J. Chem. Soc. Chem. Commun. 1975, 830.
44. +, 1.899(3) Å; Collins, S.; Koene, B. E.; Ramachandran, R.; Taylor, N. J. Organometallics 1991, 10, 2092.
45. 2Cp, 1,910(4) Å: Casey, C. P.; Jordan, R. F. J. Am. Chem. Soc. 1983. 105, 665.
46. 1Bu), 1.91 Å average: Brauer, D. J.; Krüger, C. Organometallics 1982, 1, 204.
47. 1Bu). 1.924(6) Å: Reger, D. L.; Tarquini, M. E.; Lebioda, L. Organometallics 1983, 2, 1763.
48. +, 1,929(3) Å; Hong, Y.; Kuntz, B. A.; Collins, S. Organometallics 1993, 12, 964.
49. 2 1.948 Å average: Brand, H.: Arnold, J. Organometallics 1993, 12, 3655.
50. 3}2, 1.89 A average: Lubben, T. V.; Wolczanski, P. T.; Van Duyne, G. D. Organometallics, 1984, 3, 977.
51. 3}2, 1.89 A average: Lubben, T. V.; Wolczanski, P. T.; Van Duyne, G. D. Organometallics, 1984, 3, 977.
52. 3}2, 1.89 A average: Lubben, T. V.; Wolczanski, P. T.; Van Duyne, G. D. Organometallics, 1984, 3, 977.
53. Ranges for the covalent radii sums were estimated from data in the following sources: (a) Covalent radii (Å): Zr, 1.48; Hf, 1.49; O, 0.73; N, 0.75. Porterfield, W. W. Inorganic Chemistry, 2nd ed.; Academic Press, Inc.; San Diego, CA, 1993; p 214. (b) Covalem radii (Å): O. 0.66; N, 0.70. Jolly, W. L. Modern Inorganic Chemistry; McGraw-Hill, Inc.: New York, 1984; p 52. (c) For a discussion of the O and N covalent radii see ref 15b. p 54.
54. Ranges for the covalent radii sums were estimated from data in the following sources: (a) Covalent radii (Å): Zr, 1.48; Hf, 1.49; O, 0.73; N, 0.75. Porterfield, W. W. Inorganic Chemistry, 2nd ed.; Academic Press, Inc.; San Diego, CA, 1993; p 214. (b) Covalem radii (Å): O. 0.66; N, 0.70. Jolly, W. L. Modern Inorganic Chemistry; McGraw-Hill, Inc.: New York, 1984; p 52. (c) For a discussion of the O and N covalent radii see ref 15b. p 54.
55. Ranges for the covalent radii sums were estimated from data in the following sources: (a) Covalent radii (Å): Zr, 1.48; Hf, 1.49; O, 0.73; N, 0.75. Porterfield, W. W. Inorganic Chemistry, 2nd ed.; Academic Press, Inc.; San Diego, CA, 1993; p 214. (b) Covalem radii (Å): O. 0.66; N, 0.70. Jolly, W. L. Modern Inorganic Chemistry; McGraw-Hill, Inc.: New York, 1984; p 52. (c) For a discussion of the O and N covalent radii see ref 15b. p 54.
56. (a) Howard, W. A.; Trnka, T. M.; Parkin, G. Inorg. Chem. 1995, 34, 5900, and references therein.
57. (b) Steffey, B. D.; Fanwick, P. E.; Rothwell, I. P. Polyhedron, 1990, 9, 963.
58. (c) Acho, J. A.; Doerrer, L. H.; Lippard, S. J. Inorg. Chem. 1995, 34, 2542.
59. (d) Howard, W. A.; Parkin, G. J. Am. Chem. Soc. 1994, 116, 606.
60. 2*Hf(H)NHMe. 2.027(8) Å; Hillhouse, G. L.; Bulls, A. R.; Santarsiero, B. D.; Bercaw, J. E. Urganometullics 1988, 7, 1309.
61. 2. 2.07 Å average: Diamond, G. M.; Jordan, R. F.; Petersen, J. L. Organometallics, in press.
62. 2. 2.12 A average: Zambrano, C. H.; Profilet, R. D.; Hill, J. E.; Fanwick, P. E.; Rothwell, I. P. Polyhedron 1993, 12, 689.
63. (a) Andersen, R. A.; Beach, D. B.: Jolly, W. L. Inorg. Chem. 1985, 24, 4741.
64. (b) Bradley, D. C.; Chisholm, M. H. Acc. Chem. Res. 1976, 9, 273.
65. (c) Lukens, W. W.; Smith, M. R.; Anderson, R. A. J. Am. Chem. Soc. 1996, 118, 1719.
66. Angles between planes: Hf-N2-N4-N5-N6/C17-N6-C18, 37.3°; Hf-N2-N4-N5-N6/C15-N5-C16, 28.3°.
67. 2 bonds in 3 ana 5. Χ values: N, 3.04; Cl, 3.16; O. 3.44.
68. Extended Hückel calculation were performed on a CaChe system CaChe Scientific, Inc.), release 3.6, version number CA45R. The Alvarez parameter set included in this version was used; parameter K was set to 1.75.
69. 2 is 1.78 Å. Jones, S. B.; Petersen, J. L. Inorg. Chem. 1981, 20, 2889.
70. Giannini, L.; Solan, E.; De Angelis, S.; Ward, T. R.; Floriani. C.; Chiesi-Villa, A.; Rizzoti, C. J. Am. Chem. Soc. 1995, 117, 5801.