Synthesis of cationic π-complexes of transition metals of groups VI–VIII by exchange of the carbonyl ligands in strong protonic acids

Abstract

The review of the works of the author and coworkers reveals that metal carbonyl complexes may be successfully used as starting compounds in the synthesis of cationic π-complexes of transition metals of groups VI–VIII. The carbonyl ligands may be substituted be allyl, diene, propargyl, ethylene and arene ligands with the oxidation state of the metals being either increased or retained depending on the electronic requirements of the metal. Numerous examples demonstrate efficiency of this one-step synthesis making use of the combined action of strong protonic acid and UV irradiation.