3.5 Proposed mechanism
To synthesize CTS by a microwave-assisted refluxing
method, CuCl22H2O, SnCl22H2O, and TBZ with
3 : 1 : 4 molar ratio Cu : Sn : S were dissolved in ethylene
glycol (HOCH2CH2OH). It is well known that TBZ
(NH2NHCSNH2) is usually considered as a bidentate ligand
of which sulfur and nitrogen atoms are in favorable positions
to form five-membered rings and able to form complexes
with transition metals.29)