A novel Azo-Schiff base ligand L 2-[1.5-Dimethyl-3-[2-(5-methyl-1H-indol-
3-yl) - ethylimino] - 2 - phenyl - 2,3 - dihydro - 1H - pyrazol - 4 - ylazo] - 5-
hydroxy -benzoic acid has been synthesized from reaction 1.5-Dimethyl-3-[2-(5-
methyl- 1H -
indol - 3 - yl) - ethylimino] - 2 - phenyl - 2.3 - dihydro - 1H -
pyrazol - 4 - ylamine (A) with m-hydroxy benzoic acid. Then, its Zn(II), Cd(II)
and Hg(II) complexes were synthesized with the general formula [ML1Cl]
where M = Zn(II), Cd(II) and Hg(II) are reported. The ligand and its metal
complexes have been characterized by elemental analysis, metal content,
Chloride containing, molar conductance, FT-IR, 1H and 13C- NMR, UV-Vis
spectra, magnetic susceptibility, thermal analysis, and mass spectra. The
activation thermodynamic parameters, such as ΔE*, ΔH*, ΔS* ΔG* and K are
calculated from the TGA curve using Coats-Red fern method. The all prepared
complexes were assayed for antibacterial (Escherichia coli and Staphylococcus
aureus) activities by disc diffusion method. The results indicate that all tested
ligand and complexes show antibacterial activity against E. coli and S aureus,
as gram negative and positive bacteria.
