Vibrational intensities in molecules with strained bonds: cyclopropane

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Abstract
Static and dynamic electronic charges in cyclopropane are derived from infrared intensities using parametric methods already successfully tested on many other organic molecules. Rigorous and somewhat simpler methods are adopted and the results compared. It is shown that, because of the presence of strained CC bonds in the molecule, the electrical behaviour of the C—H groups approaches that of C—H bonds in =CH2 groups. Comparison of data from cyclopropane and ethylene oxide is made.

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