Abstract
An anharmonic potential function proposed by Parr and Brown has been tested against experimental spectroscopic data for CO2, OCS, CS2, HCN, ClCN, and N2O. The potential function, with only four adjustable parameters for the XYX case and six for the XYZ case is found to give an acceptable model for the general quartic force field of these molecules which contain, respectively, 12 and 19 independent force constants.
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