Ambidentate phosphinoamide ligands [R2PNR�]- have been utilized to support metal-metal interactions in early/late heterobimetallic complexes. Upon two-electron reduction, heterobimetallic Co/Zr complexes featuring unusual coordinatively unsaturated geometries and metal-metal multiple bonds are afforded. These highly reactive complexes have been demonstrated to catalyze the Kumada cross-coupling reaction between alkyl halides and Grignard reagents under ambient conditions. Using knowledge gained from our studies on the unusual bimetallic mechanism involved in the Kumada cross-coupling and the recently reported E-H bond activation reactions (E = N, S, O) have enabled our group to uncovered further catalytic transformations. The development and scope of these reactions will be discussed.

Catalytic applications of Co/Zr heterobimetallic complexes

244th National Meeting (2012)

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