The synthesis and spectra of polycyclic 1,2,3-trithiolans
Abstract
Polycyclic 1,2,3-trithiolans have been made by reacting the olefins exo- and endo-cyclopentadiene dimer, cyclopentadiene trimer, and norbornene with elemental sulphur. The reaction with norbornadiene produced an episulphide. The vibrational (i.r. and Raman) and magnetic (1H and 13C n.m.r.) spectra of the trithiolans are consistent with a five-membered ring structure with three adjacent sulphur atoms in an exo-configuration. The trithiolans are chemically fairly stable but polymerise rapidly on heating above 180°C.