Table 2.

Physical properties and yield of the Schiff bases and their complexes.

Compound	Colour	Yield	Melting point (°C)
SBDTC	White	7.67 g	124
NS4	Light yellow	1.46 g	138.5
NS2	White	0.61 g	178
Zn(NS4)2	Yellowish green	0.65 g	200
Cd(NS4)2	Yellowish brown	2.81 g	189
Ni(NS4)2	Dark green	0.52 g	Decomposes at 309.5
Cu(NS4)2	Dark brown	0.52 g	190
Zn(NS2)2	White	0.35 g	159
Cd(NS2)2	Greyish green	0.59 g	Decomposes at 170
Ni(NS2)2	Light green	0.12 g	Decomposes at 160
Cu(NS2)2	Dark brown	0.10 g	Decomposes at 205