Multiple Metal-Metal Bonds in Iron-Chromium Complexes

摘要

Multiple metal-metal bonds are uncommon in heterobime-tallic complexes. Rare examples of heterobimetallics with short metal-metal bonds include [TiRh(OCMe2CH2PPh2)3] , [CoZr(MesNPziPr2)3(thf)], and [CrMo(O2CCH3)4] . We report the first isolable examples of metal-metal multiple bonds between two different first-row transition metals, namely iron and chromium. We have conducted spectroscopic and theoretical investigations of two Fe—Cr coordination complexes to understand the nature of these unprecedented metal-metal bonds.