Parr–Brown Anharmonic Potential Function Applied to CO2 and CS2

Abstract

An anharmonic potential function proposed by Parr and Brown in a form suited to symmetric linear triatomic molecules has been tested against experimental spectroscopic data for CO₂ and CS₂. The potential function, with only four or five adjustable parameters, gives a good fit to the spectroscopic data and models fairly well the general quartic force field of CO₂, which contains 12 independent force constants.