AbstractInfrared and near‐infrared spectra of 3‐methylbutene‐1 were observed for the vapor phase at room temperature. Also, Raman displacements and depolarization factors of 3‐methylbutene‐1 in methanol and carbon tetrachloride were obtained at the same temperature. Tentative assignments of the observed Raman and infrared bands were made, and a classification of bands on the basis of group frequencies
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