Solution and single-crystal Raman study of M(CO)6, where M = chromium, molybdenum, and tungsten

For the three compounds M(CO)6, where M = Cr, Mo, and W, ν10(t2g) has been observed in solution for the first time; a solvent-effect study of ν1, ν2, and ν3 is also reported. Single-crystal Raman experiments yielded symmetry species consistent with currently accepted assignments for these molecules except in the region below 120 cm–1 where many new lines were found for the molybdenum compound. In the ν(CO) region full factor-group splitting is shown by the ν3(eg) mode.