(Spectro)electrochemical investigations on (ferrocenyl)thiophenes modified by tungsten Fischer carbenes

A series of Fischer carbene complexes of type [(CO)5W=C(OMe)R] (R = 2-Th or fcthFc) and [(CO)5W=C(OMe)-R′-(OMe)C=W(CO)5] (R′ = th or fcthfc) was prepared for a spectroelectrochemical investigation of the low energy charge transfer interactions between the carbene substituents and the metal carbonyl fragment incorporating the heterocyclic system.