PREPARATION, STRUCTURAL CHARACTERIZATION, THERMAL AND ELECTRICAL STUDIES OF SOME 1ST ROW TRANSITION-METAL COMPLEXES OF 2,3-BIS(2-PYRIDYL)PYRAZINE

The chloro compounds of cobalt, nickel and copper with 2,3-bis(2-pyridyl)pyrazine have been prepared in ethanolic solution. The thermal behaviour of these compounds, and of the compound 2,3-bis(2-pyridyl)pyrazine, has been studied by thermogravimetry and differential thermal analysis. Thermal decomposition studies on the complexes show that intermediate compounds are produced before the metal oxides are formed. Electrical measurements show that all of the compounds exhibit ohmic behaviour at room temperature. The small differences in the electrical conductivity observed for each of the metal complexes indicates that the coordinated metal ion plays no part in the conduction process.