Vibrational spectra and normal vibrations of methyl N-methyl-carbamate and N-methylcarbamoyl halides

Infrared spectra of methyl N-methylcarbamate and its N-deuterated derivative have been recorded and the normal vibration analysis carried out employing the Urey-Bradley force field. The vibrational assignments of this secondary amide ester are compared with those of the primary amide ester, secondary amides and the thio analogue. Normal vibration analyses of the N-methylcarbamoyl chloride and bromide have been carried out and the UBF force constants of various secondary amide derivatives compared.