The structures of several sulfoxides, including dimethyl sulfoxide and
pentamethylene sulfoxide, were fitted with the MM3 force field to exi
sting experimental data from electron diffraction and microwave spectr
oscopy. The vibrational spectra were also fitted for dimethyl sulfoxid
e. The torsional parameters could not be determined from existing expe
rimental data, so the torsional profile for methyl ethyl sulfoxide was
fitted to ab initio values.