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The infra-red absorption spectrum of gaseous 1,1-difluoro−2,2-dichloroethylene between 2 and 22.6μ has been investigated with a prism spectrometer of high resolution. The Raman spectrum of CF2:CCl2 in the liquid state has been photographed with a three-prism glass spectrograph of linear dispersion 15A/mm at 4358A. Quantitative polarization measurements have been made. The 12 fundamental vibration frequencies have been assigned, and the observed vibration spectra have been interpreted in detail.
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Nielsen et al. (1950) studied this question.
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