Potential Constants and Thermodynamic Properties of Some X Y3 Z Type Molecules

Abstract

AbstractA general potential function containing thirteen constants seems to be necessary for the molecules of the type XY3Z, but since the latter has only six frequencies all the constants cannot be determined. Making use of an assumption of Voge and Rosenthal that the forces remain constant within certain molecular group in passing from one molecule to another, the frequencies of the molecules SnBrCl3, SnClBr3, TiBrCl3 and TiClBr3 have been calculated, using the most general potential function. The potential constants have been calculated on the basis of Wilson's group theoretical method. Using the observed fundamental frequencies the thermodynamic properties have also been calculated for these molecules.