Abstract

AbstractRegarding the molecular structure and vibrational spectral studies of the hydro and deutero sulphides and selenides, a brief survey of the work done so far has been narrated. The computed numerical values of (1) mean‐square amplitude quantities, (2) generalized mean‐square amplitudes (mean‐square parallel amplitudes, mean‐square perpendicular amplitudes and mean cross products) and (3) mean amplitudes of vibration for the temperatures at T=0 and T=298°K have been given for hydrogen sulphide, deuterium sulphide hydrogen selenide and deuterium selenide. Using the vibrational fundamental frequencies the molar thermodynamic functions have been calculated on the basis of a rigid rotator, harmonic oscillator approximation for the temperature range from 200° to 2000°K.

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