Infrared and Raman Spectra of 2, 3-Dichloro-2, 3-dimethylbutane

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Abstract
Infrared spectra of Cl(CH3)2C–C(CH3)2Cl were obtained over the region from 400 cm−1 to 4000 cm−1 at room temperature in the gas phase, dilute solutions, and KBr-disk. In the KBr-disk case, spectra were also obtained at lower temperatures. In the gas phase, and in the disk at lower temperatures, spectral simplifications were obtained. Raman spectra at room temperature were photographed for the crystalline sample, and also for 17–25% solutions in several solvents. The coexistence of trans-gauche isomers in the high-temperature solid phase of this compound was verified by spectral comparison between trans- and gauche-isomers. The energy difference between two isomers was estimated to be about 1.5 kcal/mol from temperature changes in the infrared intensities.