Synthesis, Characterization, and Antibacterial Activity of Co(II), Ni(II), Cu(II), Zn(II), Cd(II), and Hg(II) Complexes of Schiff's Base Type Ligands Containing Benzofuran Moiety

Table 2

Important IR spectral bands (cm⁻¹) of ligands and their metal complexes.

Compounds	ν(NH)	ν(C=N)	ν(C=O)	ν(N–N)	ν(M–O)	ν(M–N)	ν(M–Cl)t	ν(M–Cl)b	ν(M–Cl)
𝐋𝟏 [𝐂𝟐𝟎𝐇𝟐𝟎𝐎𝟔𝐍𝟐]	3264	1606	1696	942	—	—	—	—	—
[Cu(C20H20O6N2)Cl2]	3265	1586	1659	961	546	475	354	342	—
[Co(C20H20O6N2)Cl2]	3267	1584	1653	978	532	462	372	368	—
[Ni(C20H20O6N2)Cl2]	3269	1568	1656	969	567	465	361	372	—
[Cd(C20H20O6N2)Cl2]	3265	1578	1650	985	575	463	—	—	345
[Hg (C20H20O6N2)Cl2]	3266	1581	1655	968	525	473	—	—	356
[Zn (C20H20O6N2)Cl2]	3268	1575	1662	972	549	461	—	—	330
𝐋𝟐 [𝐂𝟏𝟕𝐇𝟏𝟐𝐍𝟐𝐎𝟑]	3267	1596	1702	958	—	—	—	—	—
[Cu(C17H12N2O3)Cl2]	3269	1581	1655	974	515	448	358	355	—
[Co(C17H12N2O3)Cl2]	3268	1573	1672	968	545	453	375	361	—
[Ni(C17H12N2O3)Cl2]	3269	1568	1662	971	562	458	391	368	—
[Cd(C17H12N2O3)Cl2]	3269	1582	1669	973	573	425	—	—	347
[Hg(C17H12N2O3)Cl2]	3267	1583	1670	965	542	469	—	—	359
[Zn(C17H12N2O3)Cl2]	3272	1578	1668	969	564	459	—	—	330