Formally 14 and 16 e- rhodium and iridium complexes, containing two N-heterocyclic carbenes, are isolable due to cyclometallation of bulky tert-butyl moieties.1 These complexes have been used as catalysts in several reactions, including amine borane dehydrogenation,2 Si-H/Si-D exchanges,3 hydrosilylation and hydrogenation. The highly reactive metal centers are capable of activating both internal and external C-H bonds. Mechanistic studies and scope of the C-H activation will be presented.  ___________________ References 1. (a) Dorta, R.; Stevens , E. D.; Nolan, S. P. J. Am. Chem. Soc., 2004  , 126, 5054; (b)  Scott, N. M.; Dorta, R.; Stevens, E. D.; Correa, A.; Cavallo, L.; Nolan, S. P. J. Am. Chem. Soc., 2005  , 127, 3516.2. Fortman, G. C.; Slawin, A. M. Z.; Nolan, S. P. Organometallics 2011  , 30, 5487-5492.3. Fortman, G. C.; Jacobsen, H.; Cavallo, L.; Nolan, S. P. Chem. Commun. 2011  , 47, 9723-9725.

Catalytic activity and C-H activation using 14 and 16 electron Rh and Ir complexes containing cyclometallated N-heterocyclic carbenes

244th National Meeting (2012)

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