ABSTRACT
Methylsulfonylmethane (or dimethyl sulfone), a naturally produced and vitally important organosulfur compound in living organisms, was irradiated with gamma rays, and the produced radicals were investigated using electron paramagnetic resonance spectroscopy at different temperatures. The structure and behavior of the radical changed when the temperatures varied. The hyperfine splitting of the CH(3) group was small, and the (33)S splitting was relatively high between 80 and -50 °C. When the temperature was between -50 and -160 °C, the (33)S splitting became small and the CH(3) splitting was higher. However, the group kept rotating; therefore, only the isotropic splitting values were measured, and the g-values were anisotropic. When the temperature decreased below -180 °C, the CH(3) group stopped rotating, and the hydrogen splitting values became nonequivalent due to an inhomogeneous electron distribution. The observed structures can be explained by referring to both the experimental and theoretically calculated values reported.
Subject(s)
Dimethyl Sulfoxide/chemistry , Models, Molecular , Molecular Conformation , Sulfones/chemistry , Temperature , Electron Spin Resonance SpectroscopyABSTRACT
In the crystal structure of the title compound, C(20)H(20)OP(+)·Cl(-), the cations and anions are linked by inter-molecular C-Hâ¯Cl and O-Hâ¯Cl hydrogen bonds into chains running parallel to the b axis. In the cation, the hy-droxy-ethyl group is disordered over two orientations with site-occupancy factors of 0.554â (4) and 0.446â (4).
