Complexing Behaviour and Antifungal Activity of N-[(1E)-1-(1H-Benzimidazol-2-yl)ethylidene]morpholine-4-carbothiohydrazide and Related Ligand with Metal Ions

Table 3

Prominent I.R. bands of ligands and their complexes in cm⁻¹.

Compound	𝜈(NH), 𝜈(OH), 𝜈(CH2), +𝜈(C–H)	𝜈(C=N)imidazole, 𝜈(C=N)azomethene	Ring breathing mode	𝜈(C=S)	𝜈(M–N); 𝜈(M–S)
H2L-1	3350, 3240, 3120, 3040, 2949, 2860	1653, 1610, 1585	1040	912	435, 415
H2L-2	3238, 3190, 3060, 2950, 2832	1628, 1605, 1585	1035	938	431, 418
[Cu(H2L-1)Cl2]	3280, 3235, 3125, 3040, 2950, 2850	1622, 1590, 1580	1055	892	427
[Zn(H2L-1)Cl2]	3320, 3235, 3140, 3035, 2960, 2845	1615, 1595, 1580	1024	896	429
[Cu(H2L-2)Cl2]	3340, 3230, 3145, 3045, 2960, 2840	1621, 1610, 1590	1025	908	436, 413
[Ni(H2L-2)Cl2]	3340, 3240, 3140, 3045, 2950, 2840	1618, 1595, 1584	1040	912	428, 410
[Co(HL-1)2]2H2O	3320, 3245, 3140, 3050, 2960, 2840	1618, 1602, 1595	1035	768	441, 418
[Zn(HL-2)2]	3340–3140, 3050, 2960, 2850	1622, 1605, 1592	1030	772	438, 416
[Ni(HL-2)2]2H2O	3380–3100br, 2960, 2840	1615, 1600, 1595	1040	782	435, 418
[Cd(HL-2)2]	3320, 3240, 3130, 2960, 2850	1612, 1595, 1580	1038	788	436, 417
[Co(HL-2)2]2H2O	3400–3120br, 2960, 2840	1618, 1605, 1585	1028	792	438, 422
[Ni(L-1)Py]	3320–3180, 3040, 2980, 2845	1612, 1595, 1575	1024	760	443, 418
[Cu(L-2)]Y-pic	3340, 3260, 3140, 3050, 2840	1620, 1590, 1580	1025	772	434, 415
[Cu(L-2)]2H2O	3350–3060, 2950, 2840	1620, 1600, 1580	1025	781	438, 410
[Zn(L-1)Py]	3320, 3270, 3130, 3040, 2955, 2845	1615, 1600 1590	1030	776	436, 413