Infrared spectra (4000–50cm− 1) of the vapor, amorphous and crystalline solids and Raman spectra (3600–10cm− 1) of the liquid with qualitative depolarization data as well as the amorphous and crystalline solids of methylaminothiophosphoryl difluoride, CH3N (H) P (= S) F2, and three deuterated species, CD3N (H) P (= S) F2, CH3N (D) P (= S) F2, and CD3N (D) P (= S) F2, have been recorded. The spectra indicate that in the vapor, liquid and ...