Photochemical isomerization of a C2N4S2 ring into a diazene
Abstract
The eight-membered rings (ArC)2N4(SPh)2[Ar = 4-XC6H4(X = Br, CF3)] undergo photoisomerization to the purple diazenes PhSNC(Ar)N
NC(Ar)
NSPh by a first-order process that is thermally smmetry-forbidden, but photochemically allowed.