First representatives of macrocyclic poly(diazene oxide furazans): 3,4:7,8:11,12:15,16-tetrafurazano-1,2,5,6,9,10,13,14-octaazacyclohexadeca-1,3,5,7,9,11,13,15-octaene 1,9- and 1,10-dioxides; 1,5,9,13-tetraoxide and its crystal structure

Macrocyclic poly(diazene oxide furazans) have been synthesised for the first time: the tetraoxide was prepared by the oxidation of diazene fragments in the tetradiazenofurazan macrocycle, and the dioxides were synthesised by the intramolecular and intermolecular oxidative cyclisation of structures already containing diazene oxide fragments. The structure of the tetraoxide derivative has been established by X-ray diffraction analysis.