Stabilization of mononuclear two-coordinate Fe(0) and Co(0) complexes

Abstract

Low coordinate iron and cobalt complexes are sought after for their catalytic applications as well as their potential as bond activators. Most of the two-coordinate iron and cobalt species are in the formal +II oxidn. state, and are stabilized with extremely bulky X-type ligands. Formally zero-valent two-coordinate transition metal species are exceedingly rare and neither two-coordinate Fe(0) nor Co(0) complexes have been characterized to date. We will present the synthesis of neutral two-coordinate mononuclear iron and cobalt complexes using the vital cyclic (alkyl)(amino)carbenes as ligands. Their unusual properties and reactivity will also be discussed.

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