Study of Synthesis, Characterization, DFT, and In Vitro Biological Activity of Cu(II), Co(II), and Fe(II) Metal Complexes Based on Heterocyclic Azo Pyrazole Dye Ligand

Table 1

Physical properties and elemental analytical data of the azo dye ligand and its metal complexes.

Elemental analysis (%) (found) calcd
Comp.	Molecular formula	Color M.wt. (g/mol)	m.p. °C	C%	H%	N%	M%	Λm (Ω^−1cm^2mol^−1)	μeff (B.M)
(HL)	[C21H17N5O2]	Brown (371)	256	67.91 (67.87)	4.61 (4.60)	18.86 (18.82)	—	24	—
Cu(II)L	[C21H19Cl2CuN5O3].H2O	Brown (523)	>300	48.15 (48.13)	3.66 (3.71)	13.37 (13.34)	12.13 (11.84)	30	1.76
Co(II)L	[C21H19Cl2CoN5O3].H2O	Blue (523)	>300	48.58 (49.05)	3.69 (3.43)	13.49 (13.23)	11.35 (10.68)	41	4.68
Fe(II)L	[C21H19Cl2FeN5O3].H2O	Pale- yellow (516)	>300	48.87 (48.84)	3.71 (3.23)	13.57 (13.14)	10.82 (10.49)	28	5.15