Abstract

For cyclopropyl isothiocyanate, the IR (4000-200 cm-1) spectra in all 3 phases and the Raman spectra of the liq. and solid phases were recorded. Raman depolarization data and IR gas phase band contours showed that cyclopropyl isothiocyanate exists in the cis conformation. No evidence for the existence of other conformations was found in the spectra. An assignment for 24 of the 27 fundamental vibrational modes is proposed and this assignment is in excellent agreement with vibrational assignments for other monosubstituted cyclopropanes and a no. of isothiocyanate compds.