“… CO and CO2 into … bonds of alcohols by the Se-Ru-CO hydride clusters [(μ-H)Ru4(CO)10Se2](-) (1) and [(μ3-H)Ru5(CO)14Se](-) (2) was … the protonic hydride, the electron-rich Ru atom, and the electronegative Se atom as well as the symmetry of the clusters.”