PMR Spectrum of Butadiene Sulphone Oriented in a Lyotropic Solvent

Abstract

Studies of the ring puckering vibrations in several 4 and 5 membered ring systems using the technique of NMR spectroscopy of oriented molecules have so far been undertaken in thermotropic solvents.^1–10 It has in general been found that whereas the four membered rings in systems like trime thylene sulphide and trimethylene oxide are puckered, the five membered ones (like in butadiene sulphone) are essentially planar with C_2v-symmetry. The influence of solvents on the information thus derived has not been examined sso far. An investigation on butadiene sulphone dissolved in a widely different phase formed by 43 per cent decylamine hydrochloride, 53 per cent heavy water, 1 per cent decanol and 3 per cent sodium sulphate (A) was undertaken in order to find out any solvent effect. The results are reported in the present communication.