Vibrational spectra of crystalline hexacarbonyl-chromium,-molybdenum, and -tungsten in the 4 000 cm–1 region

Abstract

The Raman spectra of polycrystalline transition metal hexacarbonyls M(CO)₆, M = Cr, Mo, W, in the 4 000 cm^–1 region are reported. The spectra are interpreted using a two-phonon model. In marked contrast to the spectra in the 2 000 cm^–1 region, factor-group effects appear to be negligible, so that the spectra are much simpler than might be expected from the wealth of peaks in the fundamental region.