Thermochimica Acta, Vol.240, 215-223, 1994
Preparation, Structural Characterization, Thermal and Electrical Studies of Complexes of Cobalt, Nickel and Copper with Methyl-3-Pyridyl-Carbamate
The thiocyanate compound of cobalt(II), and the chloro compounds of cobalt(II), nickel(II) and copper(II) with methyl-3-pyridyl-carbamate were prepared in ethanolic solution from which solid compounds were isolated. The suggested structure for the cobalt compounds is tetrahedral, while for the nickel and copper compounds it is octahedral. The techniques of thermogravimetry and differential thermal analysis show that the chloro compounds of cobalt, nickel and copper form intermediate compounds before the metal oxide is produced. The thiocyanate compound of cobalt undergoes decomposition with loss of organic ligand and the formation of cobalt thiocyanate, which then decomposes to give an oxide of cobalt. Room-temperature electrical measurements are reported for the uncomplexed ligand and its metal chloride compounds. All compounds were found to exhibit ohmic behaviour.