INFRARED INTENSITIES IN $NH_{3}$ AND $PH_{3}^{*}$

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1954

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Ohio State University

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The absolute infrared intensities of the bending vibrations of $NH_{3}$ and $PH_{3}$ have been measured using the Wilson-Wells extrapolation method. In the case of the $A_{1}$ mode in $NH_{3}$, the band intensity was obtained by a study of some individual rotation lines. The observed intensities are used to calculate ""infrared bond moments"" for the N-H and P-H bonds in the different vibrations. The relation of these moments to each other and to the equilibrium molecular charge distribution is discussed in terms of a simple orbital-following model which permits changes in hybridization to occur during vibration.

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$^{*}$This work was supported by ONR.
Author Institution: Metcalf Research Laboratory, Brown University

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