Synthesis, Characterization, and Biological Activity of Mn(II), Fe(II), Co(II), Ni(II), Cu(II), Zn(II), and Cd(II) Complexes of N-Thiophenoyl-N′-Phenylthiocarbohydrazide

Table 3

Important IR spectral bands (cm⁻¹) and their assignments.

Compound	v(OH)	v(N–H)	v(C=O)/; v(NCO)	Thioamide I [𝛽(NH) + v(CN)]	Thioamide II [v(CN) + 𝛽(NH)]	Thioamide IV v(C=S)/v(C–S)	v; (N–N)
H2 TPTH	—	3125, 3100	1640	1460	1325	835	1000
[Mn(H TPTH)2]	—	3125	1605	1485	1340	820	1020
[Fe(H TPTH)2(EtOH)]	—	3120	1605	1485	1340	835	1020
[Co(TPTH)(H2O)2]	3425	—	1580	1490	1395	745	1070
[Ni(TPTH)(H2O)2]	3420	—	1580	1490	1395	740	1070
[Cu(TPTH)]	—	—	1585	1490	1400	745	1070
[Zn(TPTH)]	—	—	1585	1490	1395	760	1070
[Cd(H TPTH)2]	—	3180	1625	1485	1340	740	1020