Organic Analysis. XIV. Infrared Spectra of Phenylsulfonyl Derivatives. (3). The C-H Deformation Vibrations of Benzene Ring, the CH₃ Rocking Frequencies of SO₂CH₃ Group, and the Characteristic Absorption Bands of SO₂NH₂ Group.

Abstract

The C-H in-plane deformation vibrations of benzene ring may be intensified by the polar and heavy SO₂ group in phenylsulfonyl compounds. The CH₃-rocking vibrations in SO₂CH₃ group have smaller wave numbers than that of dimethyl sulfide, and are in the region of 980∼950 cm^-1 and 790∼760 cm^-1. RSO₂NH₂ compounds have characteristic frequencies in the region of 919∼896 cm^-1, which may be assigned to S-N stretching vibration.