A. Noguchi, K. Hanai, T. Okuda
1980
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Journal
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Abstract
Abstract The i.r. and Raman spectra of the eight isotopic N-methylmethanesulfonamides have been recorded in the liquid state. The i.r. spectrum of the undeuterated compound has been recorded in the liquid state at different temperatures and in the crystalline state, but no spectral changes attributable to the rotational isomerism have been observed. The normal coordinate calculation has been carried out for the most probable conformation, and the isotope shifts have been reproduced well. The force constants obtained have been transferred to the other possible conformers, and the conformation dependence of the vibrational frequencies has been discussed.