“…Vacuum pyrolysis of tert-butynyl ethynyl sulfide at 500 8C results in the formation of thioketene (31), which is more stable than its tautomers, viz., thiirane and ethylthiol. 94 On heating to 250 8C, dibenzyl sulfide is converted into stilbene with liberation of hydrogen sulfide. The latter partly reduces stilbene to toluene.…”