Coordinating properties of some solvents in Cr(CO)5L complexes

Abstract

The influence of the donor-acceptor properties of several solvents on the Cr(CO)5 group in the solid [Cr(CO)5·solvent] complexes has been examined by spectroscopic methods. Relationships were found between the acceptor number of solvent with the π acceptor ability (Graham π parameter) and with the λmax for the ligand field 1A1 → 1E transition, in the carbonyl chromium complexes. These relations are discussed in terms of the dative metal-ligand π bonding. From these results, it is possible to demonstrate the π contribution in the acceptor number. © 1988 Pergamon Press plc.