The formation of tetrameric oxotechnetium(V) and oxorhenium(V) complexes by cyclisation of a potentially multidentate thiocarbohydrazide derivative

Tetrameric complexes of the composition [MO(L1)]4 (M = Tc, Re), where (L1)3– represents an asymmetric, trianionic cyclisation product with thiocarbamoylbenzamidinato and mercaptotriazolato donor sites, were formed during reactions of [TcOCl4]– or [ReOCl4]– with a potentially multidentate ligand derived from thiocarbohydrazide and N-[Nʹ,Nʹ-diethylamino(thiocarbonyl)]benzimidoyl chloride.