Kinematical evaluation of force constants: Application to trihalides of phosphorus and arsenic

Abstract

The F-matrix elements for the two-dimensional symmetry species are dependent on one arbitrary parameter in addition to the vibrational frequencies. This parameter has been chosen as an angle π (0 ≤ π ≤ 2π) and the F-matrix elements for the A1- and the E-species of trihalides of phosphorus and arsenic have been studied as functions of π. It is found that the best values of the force constants obtained from Coriolis 1; constants can be correlated with those values of the angle ξ for which the bending force constant exhibits a minimum. © 1970 Australian Journal of Chemistry. All rights reserved.