Abstract

Reaction of CrCl 2 and Li[( o-ClC 6H 4N) 2CH] in THF gives Cr 2[( o-ClC 6H 4N) 2CH] 3( μ-Cl). This compound has three bridging formamidinates and a bridging chlorine atom. The resulting A-frame is the first having a quadruply bonded M 2 4+ unit. The Cr–Cr distance of 1.940(1) Å is in the normal range for a short quadruple bond.

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