The preparation and X-ray crystal structure of the first metal–1,3,2,4-dithiadiazolylium salt, [Hg(CNSNS)2][AsF6]2, a transfer agent for the dithiadiazolylium ring

Abstract

The reaction of two equivalents of [SNS][AsF₆] with Hg(CN)₂ yields [Hg([graphic omitted])₂][AsF₆]₂1, the first example of a dithiadiazolylium ring bonded to a metal centre via the carbon; the reaction of 1 with iodine and bromine gave the hexafluoroarsenates(V) of [I–[graphic omitted]]⁺ and previously unreported [Br–[graphic omitted]]⁺, thereby demonstrating the potential of 1 as a transfer reagent for the dithiadiazolylium cation.