A series of ruthenium complexes featuring the �-diketiminato ligand have been synthesized, characterized and evaluated as catalysts for the rapid dehydrogenation of H3NBH3. These �-diketiminato-complexes have the unique ability to cleave H2 heterolytically under mild conditions.1,2,3 The high performance of the catalysts is demonstrated by liberation of two equivalents of H2.3 Importantly, poisoning experiments reveals the homogenous nature of these catalysts.3 The bifunctional activity is shown through both experimental and computational investigations, but involve a complicated set of mechanisms, through not the only the activation of H2, but also a [4+2] cyclo-addition of the corresponding boroimine intermediate, a new precedent in the literature.(1) Phillips, A. D.; Laurenczy, G.; Scopelliti, R.; Dyson, P. J. Organometallics 2007  , 26, 1120.(2) Phillips, A.D; Schreiber, D.; PCT Int. Appl. (2011 ), WO 2011151792 A1 20111208(3) Schreiber, D. F.; O'Connor, C.; Grave, C.; Ortin, Y.; M�ller-Bunz, H.; Phillips, A. D. ACS Catalysis,2012 accepted.

Ruthenium β-diketiminate complexes as catalysts for the rapid and efficient dehydrogenation of ammonia borane

245th National Meeting (2013)

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