Thermal analysis of thiocarbohydrazone complexes.

Compound	Temp range °C	% Total loss in weight found (calc.)	Composition of the residue	Probable composition of the expelled groups
Co(ii) complex	30.0–110	2.45 (2.51)	C24H26N8O5S2Cl2Co	One molecule of lattice H2O
	110–160	5.00 (5.02)	C24H24N8O4S2Cl2Co	One molecule of coordinated H2O
	161–385	32.0 (31.9)	C22H16N4O4S2Co	Two molecules of Cl2, NH3 and HCN
	386–566	48.5 (48.4)	C20H14N2O4Co	Two molecules of HSCN
Ni(ii) complex	30.0–109	2.50 (2.50)	C24H26N8O5S2Cl2Ni	One molecule of lattice H2O
	110–150	4.80 (5.00)	C24H24N8O4S2Cl2Ni	One molecule of coordinated water
	151–253	15.0 (14.8)	C24H24N8O4S2Ni	One molecule of Cl2
	254–364	31.5 (31.8)	C22H16N4O4S2Ni	Two molecules of NH3 and HCN
	365–522	48.5 (48.3)	C20H14N2O4Ni	Two molecules of HSCN
Cu(ii) complex	30.0–94	3.25 (1.26)	C24H26N8S2O5Cl2Cu	Half molecule of lattice H2O
	95.0–239	24.0 (13.7)	C24H24N8S2O4Cu	One molecule of coordinated H2O and one molecule of Cl2.
	240–437	47.5 (47.3)	C20H14N2O4Cu	Two molecules of NH3, HCN and HSCN
Cd(ii) complex	30.0–106	1.10 (1.20)	C24H24N8O4S2Cl2Cd	Half molecule of lattice H2O
	107–232	10.9 (10.7)	C24H24N8O4S2Cd	One molecule of Cl2.
	233–269	20.0 (19.8)	C24H18N6O4S2Cd	Two molecules of NH3.
	270–306	27.0 (27.1)	C22H16N4O4S2Cd	Two molecules of HCN
	307–479	43.0 (42.9)	C20H14N2O4Cd	Two molecules of HSCN