Sulphur monoxide: reaction with trienes
Abstract
Sulphur monoxide reacts with trans-3,4-diphenylhexa-1,3,5-triene (I) to form 2,7-dihydro-4,5-diphenylthiepin 1-oxide (II) and with cyclohepta-1,3,5-triene (V) to form dihydroheptafulvalene (ditropyl)(VI). These reactions can be understood if one assumes that sulphur monoxide reacts in the 3Σ– electronic state.