Force field calculations and vibrational spectra of (CH3) 2NCOCON (CH3) 2 (TMO),(CH3) 2NCOCSN (CH3) 2 (TMMTO) and (CH3) 2NCSCSN (CH3) 2 (TMDTO) are discussed. The amide and thioamide fundamentals and those of other simple tertiary amides are compared. A characteristic pattern in infrared and Raman is proposed.
