Abstract
Band progressions were observed in the CH 2 scissoring region of the infrared spectra of trimethylene sulfide (TMS) and three of its deuterated analogs (viz., α - d 2, β - d 2, and α, α′ - d 4). These absorptions are assigned to combination tones of CH 2 scissoring fundamentals with the ring puckering mode and its overtones. The scissoring vibrations of the α- and β-methylene groups were identified. Some comments are made regarding the potential governing the puckering mode in the excited states of other vibrations.
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