Vibrational circular dichroism and vibrational optical rotatory dispersion in molecular crystals. I. Fundamental tones

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Abstract
A theory is advanced of the vibrational circular dichroism (VCD) and of the vibrational optical rotatory dispersion (VORD) in molecular crystals for the frequency region of the intramolecular vibrations. The substantial role of the symmetry of the crystal lattice is shown. The contributions of the fundamental tones of nondegenerate and degenerate vibrations in VORD and VCD are discussed. The effect of the separate molecule and of the intermolecular interaction on the gyrotropy of the crystal is estimated. The most favorable conditions for experimental examination of VCD are commented upon, as well as the information obtained from the VCD spectra.