Synthesis, Characterization, and Antibacterial Activities of 1H-Imidazo [5, 6-f] [1,10] Phenanthroline-2(3H)-Thione and Its Ni(II) and Cu(II) Complexes

Table 3

Major IR spectral frequencies of the ligand and its complexes.

Compound	(N-H) cm^−1	(O-H) cm^−1	(C-H) cm^−1	(C=O) cm^−1	(C=N) cm^−1 (phenring)	(C=C) cm^−1	(C-N) cm^−1	(C=S) cm^−1	(C-H) bending cm^−1	(M-N) cm^−1
L[C13H8N4S]	3433b	—	2972–2713w	—	1617s	1422s	1315s	1019s	731s	—
[NiC26H20N8O4]Cl2	—	3232s,b	—	1701w	1626s	1426s	1319w	—	730s	616w
[CuC26H20N8O4]Cl2	—	3378s,b	3074w	1698s	1630s	1430s	1301m	—	725s	548w

b = broad; s = strong; m = medium; w = weak.