α-Hydrogen elimination from (1-aza-1,3-diene)titanium complexes: Synthesis of metallacyclic titanium - alkylidene complexes

Angewandte Chemie - International Edition

Volumn 37, Issue 13-14, 1998, Pages 1857-1861

  Kahlert, Steffen ^a   Görls, Helmar ^b   Scholz, Joachim ^a  

^a MARTIN LUTHER UNIVERSITY HALLE WITTENBERG   (Germany)

^b FRIEDRICH SCHILLER UNIVERSITY JENA   (Germany)

Author keywords

Agostic interactions; Carbene complexes; N ligands; Titanium

Indexed keywords

EID: 0345628017     PISSN: 14337851     EISSN: None     Source Type: Journal    
DOI: 10.1002/(SICI)1521-3773(19980803)37:13/14<1857::AID-ANIE1857>3.0.CO;2-6     Document Type: Article

References (70)

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37. [20b]
38. The terms prone and supine for the designation of the orientation of the 1-aza-1,3-diene in the CpTi(1-aza-1,3-diene)Cl complexes 3a and 3b were originally introduced in order to better characterize the stereochemical relations in 1,3-diene complexes of the early transition metals. The previously used classical descriptions exo and endo were unsuitable to accurately describe this kind of conformation isomerism. a) H. Yasuda, A. Nakamura, Angew. Chem. 1987, 99, 745-764; Angew. Chem. Int. Ed. Engl. 1987, 26, 723-742; b) J. Chen, Y. Kai, N. Kasai, H. Yamamoto, H. Yasuda, A. Nakamura, Chem. Lett. 1987, 1545-1548; H. Yamamoto, H. Yasuda, K. Tatsumi, K. Lee, A. Nakamura, J. Chen, Y. Kai, N. Kasai, Organometallics 1989, 8, 105-119.
39. The terms prone and supine for the designation of the orientation of the 1-aza-1,3-diene in the CpTi(1-aza-1,3-diene)Cl complexes 3a and 3b were originally introduced in order to better characterize the stereochemical relations in 1,3-diene complexes of the early transition metals. The previously used classical descriptions exo and endo were unsuitable to accurately describe this kind of conformation isomerism. a) H. Yasuda, A. Nakamura, Angew. Chem. 1987, 99, 745-764; Angew. Chem. Int. Ed. Engl. 1987, 26, 723-742; b) J. Chen, Y. Kai, N. Kasai, H. Yamamoto, H. Yasuda, A. Nakamura, Chem. Lett. 1987, 1545-1548; H. Yamamoto, H. Yasuda, K. Tatsumi, K. Lee, A. Nakamura, J. Chen, Y. Kai, N. Kasai, Organometallics 1989, 8, 105-119.
40. The terms prone and supine for the designation of the orientation of the 1-aza-1,3-diene in the CpTi(1-aza-1,3-diene)Cl complexes 3a and 3b were originally introduced in order to better characterize the stereochemical relations in 1,3-diene complexes of the early transition metals. The previously used classical descriptions exo and endo were unsuitable to accurately describe this kind of conformation isomerism. a) H. Yasuda, A. Nakamura, Angew. Chem. 1987, 99, 745-764; Angew. Chem. Int. Ed. Engl. 1987, 26, 723-742; b) J. Chen, Y. Kai, N. Kasai, H. Yamamoto, H. Yasuda, A. Nakamura, Chem. Lett. 1987, 1545-1548; H. Yamamoto, H. Yasuda, K. Tatsumi, K. Lee, A. Nakamura, J. Chen, Y. Kai, N. Kasai, Organometallics 1989, 8, 105-119.
41. The terms prone and supine for the designation of the orientation of the 1-aza-1,3-diene in the CpTi(1-aza-1,3-diene)Cl complexes 3a and 3b were originally introduced in order to better characterize the stereochemical relations in 1,3-diene complexes of the early transition metals. The previously used classical descriptions exo and endo were unsuitable to accurately describe this kind of conformation isomerism. a) H. Yasuda, A. Nakamura, Angew. Chem. 1987, 99, 745-764; Angew. Chem. Int. Ed. Engl. 1987, 26, 723-742; b) J. Chen, Y. Kai, N. Kasai, H. Yamamoto, H. Yasuda, A. Nakamura, Chem. Lett. 1987, 1545-1548; H. Yamamoto, H. Yasuda, K. Tatsumi, K. Lee, A. Nakamura, J. Chen, Y. Kai, N. Kasai, Organometallics 1989, 8, 105-119.
42. 2]: 2.111(4), 2.118(3) Å, L. Scoles, R. Minhas, R. Duchateau, J. Jubb, S. Gambarotta, Organometallics 1994, 13, 4978-4983. Typical lengths of Ti-N σ bonds (titanium amides): 1.939 Å, F. H. Allen, O. Kennard, D. G. Watson, L. Brammer, A. G. Orpen, R. Taylor, J. Chem. Soc. Perkin Trans. 2 1987, S1-S19.
43. 2]: 2.111(4), 2.118(3) Å, L. Scoles, R. Minhas, R. Duchateau, J. Jubb, S. Gambarotta, Organometallics 1994, 13, 4978-4983. Typical lengths of Ti-N σ bonds (titanium amides): 1.939 Å, F. H. Allen, O. Kennard, D. G. Watson, L. Brammer, A. G. Orpen, R. Taylor, J. Chem. Soc. Perkin Trans. 2 1987, S1-S19.
44. 2]: 2.111(4), 2.118(3) Å, L. Scoles, R. Minhas, R. Duchateau, J. Jubb, S. Gambarotta, Organometallics 1994, 13, 4978-4983. Typical lengths of Ti-N σ bonds (titanium amides): 1.939 Å, F. H. Allen, O. Kennard, D. G. Watson, L. Brammer, A. G. Orpen, R. Taylor, J. Chem. Soc. Perkin Trans. 2 1987, S1-S19.
45. 2]: 2.111(4), 2.118(3) Å, L. Scoles, R. Minhas, R. Duchateau, J. Jubb, S. Gambarotta, Organometallics 1994, 13, 4978-4983. Typical lengths of Ti-N σ bonds (titanium amides): 1.939 Å, F. H. Allen, O. Kennard, D. G. Watson, L. Brammer, A. G. Orpen, R. Taylor, J. Chem. Soc. Perkin Trans. 2 1987, S1-S19.
46. 2]: 2.111(4), 2.118(3) Å, L. Scoles, R. Minhas, R. Duchateau, J. Jubb, S. Gambarotta, Organometallics 1994, 13, 4978-4983. Typical lengths of Ti-N σ bonds (titanium amides): 1.939 Å, F. H. Allen, O. Kennard, D. G. Watson, L. Brammer, A. G. Orpen, R. Taylor, J. Chem. Soc. Perkin Trans. 2 1987, S1-S19.
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50. 2(μ-O)]: Ti-H 2.422, 2.489 Å, P. Gómez-Sal, M. Mena, F. Palacios, P. Royo, S. M. Carreras, J. Organomet. Chem. 1989, 375, 59-65.
51. 2(μ-O)]: Ti-H 2.422, 2.489 Å, P. Gómez-Sal, M. Mena, F. Palacios, P. Royo, S. M. Carreras, J. Organomet. Chem. 1989, 375, 59-65.
52. 2(μ-O)]: Ti-H 2.422, 2.489 Å, P. Gómez-Sal, M. Mena, F. Palacios, P. Royo, S. M. Carreras, J. Organomet. Chem. 1989, 375, 59-65.
53. 2(μ-O)]: Ti-H 2.422, 2.489 Å, P. Gómez-Sal, M. Mena, F. Palacios, P. Royo, S. M. Carreras, J. Organomet. Chem. 1989, 375, 59-65.
54. 2(μ-O)]: Ti-H 2.422, 2.489 Å, P. Gómez-Sal, M. Mena, F. Palacios, P. Royo, S. M. Carreras, J. Organomet. Chem. 1989, 375, 59-65.
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57. nM=CRR′] can be found in references [1d, h, 3a].
58. -3. b) Further details of the crystal structure investigations may be obtained from the Fachinformationszentrum Karlsruhe, D-76344 Eggenstein-Leopoldshafen, Germany (fax: (+49)7247-808-666; e-mail: crysdata@fiz-karlsruhe.de), on quoting the depository numbers CSD-407632, CSD-407634, and CSD-407633.
59. 2]: 2.6321(7) Å, B. Tsuie, D. C. Swenson, R. F Jordan, J. L. Petersen, Organometallics 1997, 1392-1400. The Ti-I bond in 5b (2.8012(7) Å) is, of course, slightly longer than that in 5a (2.7893(6) Å) through the Li-I contact.
60. 2]: 2.6321(7) Å, B. Tsuie, D. C. Swenson, R. F Jordan, J. L. Petersen, Organometallics 1997, 1392-1400. The Ti-I bond in 5b (2.8012(7) Å) is, of course, slightly longer than that in 5a (2.7893(6) Å) through the Li-I contact.
61. 2]: 2.6321(7) Å, B. Tsuie, D. C. Swenson, R. F Jordan, J. L. Petersen, Organometallics 1997, 1392-1400. The Ti-I bond in 5b (2.8012(7) Å) is, of course, slightly longer than that in 5a (2.7893(6) Å) through the Li-I contact.
62. 2]: 2.6321(7) Å, B. Tsuie, D. C. Swenson, R. F Jordan, J. L. Petersen, Organometallics 1997, 1392-1400. The Ti-I bond in 5b (2.8012(7) Å) is, of course, slightly longer than that in 5a (2.7893(6) Å) through the Li-I contact.
63. 2]: 2.6321(7) Å, B. Tsuie, D. C. Swenson, R. F Jordan, J. L. Petersen, Organometallics 1997, 1392-1400. The Ti-I bond in 5b (2.8012(7) Å) is, of course, slightly longer than that in 5a (2.7893(6) Å) through the Li-I contact.
64. + ion is surrounded by four different bonding partners.
65. + ion is surrounded by four different bonding partners.
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