• S. RAMARASAN
• Dr. L. RAKESH SHARMA
• Dr. A. N. PAUL ANGELO

A formerly new resorcinol based acyclic ligand (L) was synthesized by Schiff base condensation reaction. The ligand was synthesized by microwave assisted method at enhanced yield and hugely reduced reaction time. The new ligand was completely characterized. A series of cobalt (III), nickel (II) and copper (II) and zinc (II) complexes of the unreported ligand (L) has been synthesized by the direct reaction of the preformed ligand (L) with cobalt(III), nickel (II) and copper (II) and zinc (II) salts in 1:1 mole ratio in ethanol. The free ligand is neutral, but on complexation with metal ions, it tends to lose both the phenolic hydrogen and coordinates with cobalt (III), nickel (II), copper (II) and zinc (II) metal ions as dianionic moiety. The ligand (L) being tetradentate in nature coordinates through its two nitrogen donors and two oxygen donors in the equatorial positions, the ligand serves as dianionic tetradentate dioxadiaza moiety. The perchlorate complexes of the ligand were isolated and characterized thoroughly, using elemental analysis, electronic spectroscopy, infrared, molar conductivity measurements, magnetic susceptibility, 1H NMR and 13C NMR studies. The complexes formed were of mononuclear in nature. The effective antimicrobial activity on both ligand and complexes were screened against gram positive, gram negative bacterial pathogens and fungal pathogens.

Resorcinol based ligand, tetradentate ligand, dioxadiaza ligand, resorcinol, Schiff base condensation, dianionic ligand, transition metal complexes and antimicrobial activity.

"SYNTHESIS, SPECTRAL CHARACTERIZATION AND ANTIMICROBIAL STUDIES OF Co(III), Ni(II), Cu(II) AND Zn(II) METAL COMPLEXES OF SCHIFF BASE DERIVED FROM 4,6-DIACETYL RESORCINOL AND 4-CHLORO-2-AMINO PHENOL", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 8, page no.394-404, August-2018, Available :http://www.jetir.org/papers/JETIR1808809.pdf

"SYNTHESIS, SPECTRAL CHARACTERIZATION AND ANTIMICROBIAL STUDIES OF Co(III), Ni(II), Cu(II) AND Zn(II) METAL COMPLEXES OF SCHIFF BASE DERIVED FROM 4,6-DIACETYL RESORCINOL AND 4-CHLORO-2-AMINO PHENOL", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 8, page no. pp394-404, August-2018, Available at : http://www.jetir.org/papers/JETIR1808809.pdf