4-Phenyl-1,2,3,5-dithiadiazolyl: a novel coupling reagent for the formation of E–E bonds (E = C, P, Si)

Abstract

[Ph[graphic omittted]]₂ reacts under mild conditions with molecules containing bonds of the types P–Cl (Ph₂PCl and PhPCl₂), Si–Br (Me₃SiBr) and activated C–Cl or C–Br (ortho-chloranil or MeCOBr) with the formation of [Ph[graphic omittted]]X (X = Cl or Br) and the corresponding E–E (E = P, Si or C) bonded compounds; the application of dithiadiazolyl radicals as coupling reagents is discussed in the context of the strength of the E–Hal bond.