A novel unsaturated tetrahedral hydrido-carbonyl cluster anion of rhenium. Synthesis and X-ray characterization of [Re4(µ-H)3(µ3-H)2(CO)12]–
Abstract
The reaction of the anion [Re4(µ-H)6(CO)12]2– with acids affords the unsaturated (58 valence electron) anion [Re4H5(CO)12]–, which contains a distorted tetrahedral cluster, with Re–Re bond lengths in the range 2.857(1)–3.251(1)Å, bearing three edge-bridging and two face-capping hydride ligands, completely fluxional in solution down to –90 °C.