Trends in Structure and Vibrational Frequencies of MX 2 and MX 3 High Temperature Halide Vapors

Abstract
Trends in the structures and vibrational frequencies of gaseous and halides are summarized. An empirical correlation is presented which relates molecular shape to the polarizability of the central metal atom. Stretching vibrational frequencies are correlated with internuclear distance. These correlations provide estimates of molecular shape and stretching vibrational frequencies for many difluoride and dichloride, and trifluoride and trichloride, molecules for which experimental data are not available. The effect of these predictions on calculated thermodynamic functions is discussed.

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