SE-77, C-13 AND H-1-NMR SPECTRA OF ACYCLIC PHENYLSELENENYLALKANES AND PHENYLSELENENYLALKENES AND SOME OF THEIR SELENOXIDES

The Se-77, C-13 and H-1 NMR spectra of 57 mostly new compounds with phenylselenenyl groups attached to acyclic alkanes, alkenes and phenylalkanes and of 10 corresponding selenoxides are reported. Substituent effects on the chemical shifts of these nuclei were determined and are discussed in terms of the conformation and configuration. The results suggest that, in contrast to PhSe-C-C-SePh fragments, C-C-C-Se chains prefer a gauche conformation.