Physico-chemical investigations and thermal degradation behaviour of 4-ethylpiperazine-1-carbodithioic acid complexes of cobalt(II)

Abstract

Some new cobalt(II) carbodithioates, viz. [Co (4-EtPipzcdtH) m ]X n (4-EtPipzcdtH = 4-ethylpiperazine-1-carbodithioic acid, X = Cl, Br, ClO 4 , NO 3 and CH 3 COO when m = n = 2 and SO 4 , CO 3 when m = 2 and n = 1), have been synthesized and characterized. Infrared and UVVis spectral data along with room temperature magnetic behaviour (2.50-2.85 B.M.) indicate chelating bidentate mode of coordination of ligand, 4-EtPipzcdtH with four coordination around Co(II). 1 H NMR and ESMS of [Co(4-EtPipzcdtH) 2 ]Cl 2 further support its structure. Molar conductance study shows 1:2 electrolytic behaviour for complexes with Cl, Br, ClO 4 , NO 3 and CH 3 COO as counter anions, while 1:1 electrolytic behaviour for CO 3 and SO 4 as counter anions. Ligand and its complexes have also been studied using non-isothermal techniques (TG and DSC). The anion has been found to play pronounced effect on the nature of thermal decomposition products. The DSC curves of the complexes displayed very sharp exothermic peaks.

Catalytic reduction of 4‐nitrophenol using synthesized and characterized CoS@MorphcdtH/CoS@4‐MPipzcdtH nanoparticles

“…Reviewing the literature, [ 24 ] a CS 2 group has been introduced to fabricate 4‐methylpiperazine‐1‐carbodithioic acid and morpholinecarbodithioic acid (MorphcdtH) using the N–H bond of heterocyclic amines. Free carbodithioicacids exist in zwitterionic form and have high stability because of higher lattice energy effects.…”