STUDY OF THE BONDING IN TRANSITION-METAL CARBONYL HYDRIDES

The metal 2p3/2, carbon Is, and oxygen Is binding energies of the gaseous molecules CO2(CO)8, HCo(CO)4, Fe-(CO)5, H2Fe(CO)4, Mn2(CO)10, and HMn(CO)5 have been measured by X-ray photoelectron spectroscopy. From qualitative considerations of the binding energy shifts on going from the transition-metal carbonyls to the corresponding carbonyl hydrides, it is concluded that the hydrogen atoms in the carbonyl hydrides are negatively charged. By application of the potential model, approximate hydrogen atom charges of -0.3, -0.8, and -0.75 are calculated for H2Fe(CO)4, HMn(CO)5, and HCo(CO)4, respectively. © 1979, American Chemical Society. All rights reserved.