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 1

Analytical data of ligands and their metal complexes.

Ligand/complex	Molecular weight	Yield; (%)	Colour	M.P; °C	Elemental analysis found (cal)			𝜇eff (BM)	𝐴𝑀; (ohm^−1 cm^2mol^−1)
					C	H	N
𝐋𝟏 [𝐂𝟐𝟎𝐇𝟐𝟎𝐎𝟔𝐍𝟐]	383.378	75	Yellow	252	62.62  (62.65)	5.2  (5.3)	7.45  (7.306)	—	—
[Cu(C20H20O6N2)Cl2]	517.858	80	Green	244	46.53; (46.39)	3.95; (3.89)	5.98; (5.41)	1.74	18.452
[Co(C20H20O6N2)Cl2]	513.211	78	Dark brown	238	46.95; (46.81)	3.84; (3.93)	5.81; (5.46)	4.68	15.951
[Ni(C20H20O6N2)Cl2]	512.968	72	Light brown	262	46.54; (46.83)	3.68; (3.93)	5.63; (5.46)	2.85	14.274
[Cd(C20H20O6N2)Cl2]	566.689	75	Yellow	>300	42.45; (42.39)	3.68; (3.55)	4.85; (4.94)	—	20.361
[Hg(C20H20O6N2)Cl2]	654.868	75	Light yellow	>300	36.67; (36.68)	3.75; (3.08)	4.58; (4.27)	—	13.853
[Zn(C20H20O6N2)Cl2]	519.67	72	Yellow	265	46.25; (46.23)	3.63; (3.88)	5.52; (5.39)	—	18.593
𝐋𝟐 [𝐂𝟏𝟕𝐇𝟏𝟐𝐍𝟐𝐎𝟑]	363.198	80	Brown	130	56.26  (56.22)	3.43  (3.33)	7.6  (7.7)	—	—
[Cu(C17H12N2O3)Cl2]	497.637	75	Green	>300	41.58; (41.03)	3.56; (3.44)	5.85; (5.63)	1.79	16.653
[Co(C17H12N2O3)Cl2]	493.030	70	Light brown	123	41.65; (41.41)	2.55; (2.45)	5.75; (5.68)	4.87	15.032
[Ni(C17H12N2O3)Cl2]	492.788	73	Light brown	>276	41.57; (41.44)	2.82; (2.45)	5.69; (5.68)	2.92	15.965
[Cd(C17H12N2O3)Cl2]	546.508	72	Yellow	>300	37.46; (37.36)	2.35; (2.21)	5.25; (5.12)	—	19.942
[Hg(C17H12N2O3)Cl2]	634.687	75	Yellow	162	32.25; (32.17)	1.95; (1.91)	4.25; (4.42)	—	14.093
[Zn(C17H12N2O3)Cl2]	499.488	73	Yellow	168	41.08; (40.88)	2.81; (2.42)	5.74; (5.61)	—	19.573