Far-Infrared Spectra of Dimethylsulfide, Isobutylene, and Acetone Obtained with a Vacuum-Grating Spectrometer in the 240–10-cm−1 Spectral Region

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Abstract
The far‐infrared spectra of dimethylsulfide, isobutylene, and acetone in the 240–10‐cm−1 spectral region are reported. Absorption bands were found at 185.5, 183.5, 180.9, 176.8, 173.0, 168.2, and 162.3 cm−1 for dimethylsulfide. For isobutylene bands were found at 214.0, 197.3, 196.3, 186.5, 181.8, 176.0, and 165.0 cm−1. The strongest bands observed for acetone were at 124.5 and 104.5 cm−1. In addition to these bands strong absorption in the 45–10‐cm−1 region was found for all three compounds.
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