Dinuclear copper(II) complexes of the tetradentate thiadiazole ligands BPMTD (2,5-bis((2-pyridylmethyl)thio)thiadiazole) and BPTD (2, 5-bis(2-pyridylthio)thiadiazole). X-ray structures of (Cu2(BPTD)(mu-Br)2Br2) and (Cu(BPMTD)Cl2)n and spectroscopic electrochemical, and magnetic studies

X-ray crystallographic studies on two dinuclear Cu(II) complexes of the tetradentate thiadiazole ligands BPMTD and BPTD reveal the presence of standard dinuclear ones containing mu(1, 2)-thiadiazole-N,N' bridges. A third one dimensional polymeric chain complex does not involve thiadiazole bridging. Cyclic voltammograms for the first two complexes are consistent with one-step, two-electron, quasi-reversible redox reaction.