CRYSTAL-STRUCTURE OF CIS-(CARBON MONOXIDE)(ETA-1-CARBON DIOXIDE)BIS(2,2'-BIPYRIDYL)RUTHENIUM, AN ACTIVE SPECIES IN CATALYTIC CO2 REDUCTION AFFORDING CO AND HCOO-
A reaction of [Ru(bpy)2(CO)2](PF6)2 with 2 equiv of Bu4NOH in H2O/EtOH (1:1 v/v) affords an eta(1)-CO2 complex, [Ru(bpy)2(CO)(COO)].3H2O. An addition of an aqueous HCl solution to a MeOH solution of [Ru(bpy)2-(CO)(COO)].3H2O quantitatively regenerates [Ru(bpy)2-(CO)2]2+.