A vibrational study has been performed on N-chloromethylamine as a pro
totype molecule of N-halogenated alkylamines. The infrared spectra of
vapor phase samples of three isotopomers, normal, d(3), and N-15 speci
es were measured. The Raman spectrum of a solid sample deposited on li
quid-N-2-cooled glass was also measured. The spectra thus observed wer
e analyzed by the help of an ab initio MO calculation. The characteris
tic vibrational feature of N-chlorinated molecules has been discussed.