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Mean Amplitudes of Vibration and Thermodynamic Functions of the Difluorides of Oxygen and Silicon

✍ Scribed by G. Nagarajan

Publisher
Wiley (John Wiley & Sons)
Year
2010
Weight
390 KB
Volume
71
Category
Article
ISSN
0037-9646

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✦ Synopsis

Abstract

The developments in the vibrational assignment and molecular parameters of the difluorides of oxygen and silicon have been reported. The theory of mean‐square amplitude matrices has been applied to the bent symmetrical XY~2~ molecular model. Four valence force constants have been evaluated on the basis of Wilson's group theoretical method for these two molecules. Numerical values of the ten mean‐square amplitude quantities have been given at the temperatures T=O and T=298Β°K. The corresponding mean amplitudes of vibration for O – F, Si – F and F – F distances have also been given at these temperatures. The observed fundamental frequencies have been utilized for the calculation of molar thermodynamic functions assuming a rigid rotator, harmonic oscillator approximation for the temperature range from 100Β° to 1700Β°K.

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