The effect of the aminic substituent on the thermal decomposition of cyclic dithiocarbamates

Thermogravimetric and Differential Scanning Calorimetric investigation of t he thermal behaviour of NH4+, Na+, Zn2+, Cd2+ e Pb2+ dithiocarbamates obtai ned from cyclic amines, is described under nitrogen and air atmospheres in order to investigate the effect of a cyclic ring on the mechanism of decomp osition. Intermediates were identified by X-ray Diffraction analysis. Zn2+, Cd2+ e Pb2+ oxysulphates were detected under air atmosphere suggesting the thermal decomposition under these conditions as an alternating synthetic r oute for the preparation of these compounds. The final decomposition produc ts were the metallic sulphides under N-2 atmosphere while transition metal oxides and sodium sulphate were obtained under air. Melting enthalpies are also reported from DSC data.