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UBC Theses and Dissertations

Intensity studies in the infrared spectra of sulfur dioxide and carbon disulfide Mayhood, John Edwards


Measurements have been made of the integrated absorption coefficients of the three fundamental vibration-rotation bands of sulfur dioxide vapor. In contrast to previously reported values of these intensities, the molecular dipole moment calculated from them differs widely from the static dipole moment determined by other methods. The magnitudes of the bond moment derivatives are not in agreement with simple molecular models, indicating that infrared intensities are sensitive to the details of the electrical charge redistribution accompanying molecular distortions. The possible role of unshared electrons is discussed. Observations on the shapes, frequencies, bandwidths, and intensities of some absorption bands of sulfur dioxide and carbon disulfide in condensed phases are reported and discussed in terms of the information they may give on intermolecular interactions.

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