Vibrational Spectra and Structure of Organophosphorous Compounds. XIX. Infrared and Raman Spectra and Structure of Methoxydifluorophosphine-D 0 and -d 3

The infrared spectra of CH₃OPF₂ and CD₃OPF₂ in the gaseous and solid states and the Raman spectra of the gaseous, liquid, and solid states have been recorded from 3200 to 40 cm⁻¹. Seventeen of the 18 normal modes have been assigned through the use of group frequencies, depolarization values, band contours, and frequency shifts with isotopic substitution. The V₃ term of the asymmetric potential function was calculated to have a value of 3.41 kcal/mol from the fundamental and first overtone of the methoxy torsion. The vibrational spectra support a trans conformation for this molecule.