Chemistry of the SO bond. Part I. Nuclear magnetic resonance and infrared studies on trimethylene sulphite

The conformation of trimethylene sulphite has been studied by 1H n.m.r. spectroscopy and by an i.r. investigation of the SO bond stretching vibration in different solvents at two concentrations. From analysis of the n.m.r. spectrum, cross-ring couplings are evident, although not previously reported. The i.r. studies are more comprehensive than those in previous reports and the interpretation of our data leads to different conclusions from those of others workers.