A Cluster with the Triply Facially Bridging Trimethylenemethane Ligand: Structure and Bonding of [{Rh(cod)}3 (μ3‐H){μ3‐C(CH2)3}

Abstract

An equilaterial triangle of Rh atoms, capped on one side by an almost planar trimethylenemethane (TMM) and on the other by a hydrido ligand, is present in the title compound 1. The structure of 1 in the crystal deviates markedly from ideal C3v symmetry: the TMM ligand and the Rh3 triangle are not exactly congruent, and the COD ligands are tilted away from the TMM ligand and rotated about their C2 axis. This arrangement prevents too close an HH contact between the endo H atoms of the CC units of the COD ligands on the hydrido side of the cluster.