The Calculation of the Free Energy of Polyatomic Molecules from Spectroscopic Data. II

The methods already developed for computing the free energy from spectroscopic data for diatomic molecules and for triatomic unsymmetrical rotators are extended to handle the case where one or more of the fundamental frequencies is degenerate. New tables, necessary for such calculations, have been computed and the procedure is illustrated by sample calculations for nitrous oxide, hydrogen cyanide and acetylene.