Abstract
A harmonically coupled degenerate anharmonic oscillator model has been developed to compute the intramolecular stretching frequency distribution H 2 O in liquid phase. Mathematical formulation of the problem is based on the Lippincott-Schroeder potential function for bent hydrogen bond systems and a formula can be obtained for the anharmonicity constant. Random molecules were generated by Monte Carlo method and the elgenvalues of the vibrational Hamiltonian versus oxygen-oxygen distances were computed. The true energy levels were obtained by introducing the effect of anharmonicity to the stretching normal frequencies.
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