Synthesis, Characterization, and Biological Activity of N′-[(Z)-(3-Methyl-5-oxo-1-phenyl-1,5-dihydro-4H-pyrazol-4-ylidene)(phenyl)methyl]benzohydrazide and Its Co(II), Ni(II), and Cu(II) Complexes

Table 3

Elemental analysis and physical data of the ligand and complexes.

Compound	Colour	MF	Yield %	Elemental analysis % found (calculated)				B.M	ohm^−1cm^2mol^−1	Melting Point °C
				C	H	N	M
HL^1	Yellow	C24H20N4O2	85	72.68; (72.73)	5.21; (5.05)	14.28; (14.14)	—	—	—	196
·H2O	Yellow	C48H40N8O5Co	70	66.34; (66.43)	4.98; (4.65)	12.99; (12.92)	6.35; (6.79)	4.93	11.56	286
·H2O	Green	C48H40N8O5Ni	67	66.78; (66.45)	4.81; (4.65)	13.02; (12.92)	6.60; (6.76)	2.94	12.50	272
·H2O	Green	C46H40N8O5Cu	60	65.61; (66.08)	5.15; (4.62)	13.41; (12.85)	7.63; (7.33)	1.90	10.34	260