Abstract
A formalism suitable for the quasi-linear molecule, originally proposed by Thorson and Nakagawa, has been applied to an excited state of HCN and also to the lowest bent states of H2O, NH2, CH2, and BH2. The effects of "quasi-linearity" in these molecules gives rise to large anharmonicities in the bending vibrations. The calculations described in this paper lead to values of DK and αA which are in good agreement with experiment.

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