Raman spectra of aliphatic chlorine compounds: II. Chloroethenes and chloropropenes

Complete Raman spectra, inclusive of depolarization factors, are given for sixteen out of the thirty‐one possible chlorine derivatives of propene, ten of which have been prepared especially for this purpose. Examination of the Raman results shows that the “specific group frequencies” derived for groups such as CH 2 , CH 2 Cl, CHCl 2 , and CCl 3 from the Raman spectra of chloroethanes and chloropropanes largely retain their values in the chloropropenes. From a comparative study of the Raman spectra of chloroethenes and ‐propenes an additional number of specific group frequencies is deduced, characterizing the configurations CH 2 , CH, CHCl, and CCl 2 . The carboncarbon double‐bond frequency proper shows a decreasing value with an increasing degree of substitution of chlorine for hydrogen in the molecule.