Design and Synthesis of Metal Complexes of (2E)-2-[(2E)-3-Phenylprop-2-en-1-ylidene]hydrazinecarbothioamide and Their Photocatalytic Degradation of Methylene Blue

Table 2

Infrared vibrational bands (cm⁻¹) of ligands and their complexes with tentative assignment.

Ligand/complex	𝜐 (NH2)	𝜐 (NH)	𝜐 (C=N)	𝜐 (C=S)	𝜐 (C–S)	𝜐 (M–N)	𝜐 (M–S)
HL.H2O	3417 (br), 3261 (s)	3153 (br)	1621 (br)	1178 (s)	—	—
[Co(L)2Cl2]	3416 (br), 3261 (s)	3154 (br)	1610 (br)	—	—	443 (s)	—
[Ni(L)2]	3426 (br), 3228 (s)	—	1567 (s)	—	677	355 (s)	472
[Cu(L)2Cl2·2H2O]	3463 (br), 3211 (s)	3050 (br)	1615 (br)	1159 (s)	—	—