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Expressions for the vibrational transition moments of the molecular polarizability involved in Fermi resonances of the type 2νs:νr (qs=single, doubly, or triply degenerate mode; qr=nondegenerate mode) are reported as a function of the observed splittings ‖X‖ and of the cubic force constant krss. Fermi resonances in H2O, CO2, CH4, and CD4 are interpreted in terms of bond polarizability parameters.
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S. Montero (1983) studied this question.
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