Metal–metal multiple bond formation induced by σ-acceptor Lewis acid ligands†
Abstract
The reaction of [Cp*Ru(μ-NHPh)]2 (Cp* = η5-C5Me5) with Lewis acids of the type MX2 (M = Zn, Sn, Pb; X = Cl, OTf) affords Ru2 → M donor–acceptor adducts characterized as π complexes of a RuRu double bond with M(II) Lewis acids. The results illustrate for the first time the ability of σ-acceptor Lewis acid ligands to induce the formation of a metal–metal multiple bond via stabilizing dative interactions.