Synthesis and Characterization of the Metal(I) Dimers [Ar′MMAr′]: Comparisons with Quintuple‐Bonded [Ar′CrCrAr′]

Abstract

Cobalt together: The iron and cobalt analogues of the quintuple-bonded chromium species [Ar′CrCrAr′] (Ar′=C6H3-2,6-(2,6-iPr2C6H3)2) are described and their structures investigated by crystallography, magnetic studies, and density functional calculations. Metal-η6-aryl interactions in [Ar′FeFeAr′] and [Ar′CoCoAr′] are stronger than those detected in [Ar′CrCrAr′], whereas metal–metal bonding is much weaker.