Normal Coordinate Analysis in Cartesian Space II. Planar Symmetric XY_n Molecules

Abstract

Force constants of planar symmetric XYn type molecules in the Cartesian space have been derived in terms of the vibrational frequencies. The force constants and normal coordinates of some planar XY3 molecules with available isotoptic data are worked out. Further study of infrared absorption spectra of square planar XY4 complex ions will be needed for the present normal coordinate analysis.