Thermal, structural and electrical studies of the chloro complexes of cobalt, nickel and copper with 2-butoxypyridine

Abstract

The chloro compounds of 2-butoxypyridine with cobalt, nickel and copper were prepared in ethanolic solution from which solid compounds were isolated. The suggested structure for the cobalt compound is tetrahedral, whereas for the nickel and copper compounds it is octahedral. The techniques of thermogravimetry and differential thermal analysis show that the copper compound forms an intermediate compound before the metal oxide is formed. The cobalt and nickel compounds decompose with loss of the organic ligand and chlorine to give the metal oxides. Room temperature electrical conductivities of the prepared compounds show near-ohmic behaviour and are in the narrow range of 2.41 × 10 −8 to 6.33 × 10 −8 Ω −1 m −1. The temperature dependence of conductivity shows anomalous behaviour. The similarity in electrical properties of the compounds studied suggests that the conductivities are intrinsically controlled.