Synthesis, Spectroscopic, and Antimicrobial Studies on Bivalent Zinc and Mercury Complexes of 2-Formylpyridine Thiosemicarbazone

Table 2

Important infrared spectral bands (cm⁻¹) and their assignments, where s = strong; ms = medium strong; m = medium; mw = medium weak; w = weak.

Compounds	Assignments
	𝜈(N-H)	𝜈(N=N)	𝜈(C=N)azomethane	𝜈(C=N)pyridine	𝜈(M-N)
C7H8N4S ligand (L)	3267 s	1107 s	1611 s	557 m	—
[Zn(L)2]Cl2	3275 s	1183 s	1589 s	664 m	474 m
[Zn(L)2](NO3)2	3275 m	1177 s	1588 m	661 m	478 m
[Zn(L)2](SO4)	3286 m	1167 ms	1560 m	673 m	486 mw
[Hg(L)2]Cl2	3292 ms	1155 m	1594 s	626 m	460 w
[Hg(L)2](NO3)2	3295 s	1171 m	1551 m	621 m	459 m
[Hg(L)2](SO4)	3273 s	1163 m	1599 ms	621 m	453 w