The preparation and isolation of 5-methyl-1,3,2,4-dithiadiazolyl and the facile rearrangement of the 1,3,2,4-dithiadiazolyl radicals to the disulphide isomers, 2,3,1,4-dithiadiazolyl

Abstract

The radical 5-methyl-1,3,2,4-dithiadiazolyl has been prepared and isolated, and it and two new derivatives undergo essentially quantitative isomerisation to 2,3,1,4-dithiadiazolyl at room temperature; the rate of isomerisation follows second order kinetics and the mechanism is postulated to involve an unstable π*–π* dimer intermediate.