C-H bond activation by a rare cationic iridium dinitrogen complex. An important electronic effect in the chemistry of the hydridotris(pyrazolyl)borate ligand [3]

Journal of the American Chemical Society

Volumn 122, Issue 5, 2000, Pages 954-955

  Tellers, David M ^a   Bergman, Robert G ^a  

^a UNIVERSITY OF CALIFORNIA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

BORIC ACID; IRIDIUM; LIGAND; METAL COMPLEX;

HYDROGEN BOND; HYDROGENATION; LETTER; LIGAND BINDING; SYNTHESIS; X RAY CRYSTALLOGRAPHY;

EID: 0034624434     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja993347e     Document Type: Letter

References (28)

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4. For examples, see: (a) Fuchen, L.; Pak, E. B.; Singh, B.; Jensen, C. M.; Goldman, A. S. J. Am. Chem. Soc. 1999, 121, 4086-4087. (b) Gupta, M.; Hagen, C.; Kaska, W. C.; Cramer, R. E.; Jensen, C. M. J. Am. Chem. Soc, 1997, 119, 840-841. (c) Aoki, T.; Crabtree, R. H. Organometallics 1993, 12, 294-298.
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12. While triflate displacement from 1 occurs in a dissociative manner (see ref 5), we cannot yet rule out the possibility that the analogous reaction in 7 occurs by an associative rather than a dissociative process, see: McNeil, W. S.; Dumez, D. D.; Matano, Y.; Lovell, S.; Mayer, J. M. Organometallics 1999, 18, 3715-3727.
13. Other authors have recently noted a similar discrepancy: (a) Gunnoe, T. B.; Sabat, M.; Harman, W. D. J. Am. Chem. Soc: 1998, 120, 8747-8754. (b) Koch, J. L.; Shapley, P. A. Organometallics 1997, 16, 4071-4076.
14. Other authors have recently noted a similar discrepancy: (a) Gunnoe, T. B.; Sabat, M.; Harman, W. D. J. Am. Chem. Soc: 1998, 120, 8747-8754. (b) Koch, J. L.; Shapley, P. A. Organometallics 1997, 16, 4071-4076.
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18. Additional infrared data in support of this argument for indium can be found in the following: (a) Oldham, W. J.; Hinkle, A. S.; Heinekey, D. M. J. Am. Chem. Soc. 1997, 119, 11028-11036. (b) Gutierrez-Puebla, E.; Monge, A.; Nicasio, M. C.; Perez, P. J.; Poveda, M. L.; Rey, L.; Ruiz, C.; Carmona, E. Inorg. Chem. 1998, 37, 4538-4546.
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20. Further experimental details in support of this argument will he reported in a full paper.
21. 6 center. We are grateful to Prof. Ernesto Carmona for calling our attention to this fact.
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24. See ref 16 and: Lee, D. W.; Kaska, W. C.; Jensen, C. M. Organometallics 1998, 17, 1-3.
25. 2 ligand positions prevented the determination of exact bond lengths or angles.
26. + is observed. Tellers, D. M.; Yeston, J. S.; Golden, J. T.; Bergman, R. G. Manuscript in preparation.
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