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The infrared spectra of liquid (CH3)2PSCI and (CH3)2PSBr have been measured from 4000 to 33 cm-1. The infrared spectrum of (CH3)2P0C1 dissolved in various solvents has also been measured over the same frequency range. The Raman spectra of the sulfur-containing compounds in the liquid state have been recorded and depolarization values measured. The Raman spectrum of (CH3)2P0C1 was measured both on the pure solid and as a solution in benzene. Assignment of the fundamental vibrations based on depolarization data and position of the absorption bands is given and discussed. An alternative explanation is presented for the origin of one of the two bands of the proposed doublet for the P=S stretching vibration.

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