SYNTHESIS AND MULTINUCLEAR MAGNETIC-RESONANCE STUDY OF SOME DERIVATIVES OF MESOIONIC 1,2,3,4-THIATRIAZOLO-5-AMINIDE

Five derivatives of mesoionic 1,2,3,4-thiatriazolo-5-aminide and its s alts were synthesized. The structures of the compounds were examined b y H-1, C-13, N-14 and N-15 NMR techniques. The protonation of the comp ounds occurs on the nitrogen atoms of the exocyclic group; one or two molecules of acid are bonded, depending on the compound structure. The investigated derivatives are supposed to be a chelate type ligand bin ding metal cation. Some preliminary investigations on compound interac tion with metal cation were performed by VIS/UV technique. (C) 1998 El sevier Science B.V.