A study of the electronic structure of the dimers [Co2(η-C5Me5)2(CO)2], [Rh2(η-C5Me5)2(CO)2], [Co2(η-C5Me5)2(NO)2], and [Co2(η-C5Me5)2-(CO)(NO)] by He-I and He-II photoelectron spectroscopy

Abstract

He-I and He-II photoelectron spectra have been obtained for the compounds [M₂(η-C₅Me₅)₂(CO)₂](M = Co or Rh), [Co₂(η-C₅Me₅)₂(NO)₂], and [Co₂(η-C₅Me₅)₂(CO)(NO)]. The assignment presented is consistent with delocalized bonding in the bridge and, together with structural data, may be used to rule out alternative models where there is direct bonding between the metal atoms.