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Terminal Oxo and Imido Transition-Metal Complexes of Groups 9–11



This review summarizes the properties of group 9–11 metal–oxo and metal–imido complexes, which have been either isolated or proposed as reactive intermediates in metal-catalyzed organic transformations. We begin with a general description of the bonding of transition-metal–oxo and –imido complexes in various geometries, followed by a discussion of complexes from groups 9–11. The focus of this review is to provide a clear picture of the state of the art as well as insight towards potential future synthetic endeavors.