On the Fundamental Frequencies of CH2, CHD, CD2, CHCl, CDCl, andCisandTransC2H2D2and C2H2Cl2

摘要

A valence force treatment of the groups CH2, CHD, CD2, CHCl, CDCl is given. The relative dependence of the three fundamental frequencies calculated for each group on the deformation force constant is used as a guide in correlating these frequencies with the three individual modes of vibration of the group. On the basis of this calculation, an assignment of the fundamental frequencies ofcis, transand asymmetric C2H2D2calculated by Manneback and Verleysen is given. Also from the data on the degrees of depolarization of the Raman lines ofcisC2H2Cl2andtransC2H2Cl2, intensity and selection rules in Raman effect and infrared absorption, an assignment of the fundamental frequencies of these isomers is suggested.