Electropolymerization of [Ru(bpy)(CO)2Cl2] (bpy=2,2′-bipyridine: a revisited trans versus cis(Cl) isomeric influence study

International audienceThe mono-bipyridine bis carbonyl complex [Ru(bpy)(CO)2Cl2] exists in two stereoisomeric forms having a trans(Cl):cis(CO) (1)and cis(Cl):cis(CO) (2) configuration. In previous work we reported that only the trans(Cl):cis(CO) isomer 1 leads by atwo-electron reduction to the formation of [Ru(bpy)(CO)2]n polymeric film on an electrode surface. This initial statement wasoverstated, as both isomers allowed the build up of polymers. A detailed comparison of the electropolymerization of both isomersis reported here, as well as the reduction into dimers of parent stereoisomer [Ru(bpy)(CO)2(C(O)OMe)Cl] complexes 3 and 4obtained as side products during the synthesis of 1 and 2