Low temperature Raman measurements of carbon monoxide adsorbed on nickel at high pressures

The Raman spectra of carbon monoxide adsorbed on Raney nickel and on supported SiO2 are measured at high pressures and low temperatures with a rotating cell. In addition to the vibrational bands of adsorbed Ni(CO)4, we find three band systems of CO stretching vibrations at high wavenumbers and several bands at low wavenumbers. The CO stretching vibrations agree with infrared spectra.