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Paper Details

Synthesis and spectral investigations of binuclear Schiff base metal complexes derived from 1, 5-diaminonaphthalene

Markandan Usharani, Ekamparam Akila and Rangappan Rajavel

Journal Title:Journal of Chemical, Biological and physical sciences
Abstract


A series of binuclear Schiff base metal complexes of Cu(II), Co(II) and Ni(II) have been synthesized with Schiff base derived from 1,5-diaminonaphthalene, glyoxal/ biacetyl and 2-aminophenol.The structure of the ligands and its complexes were characterized through physico-chemical studies. The molar conductance value of bivalent metal complexes in DMF indicates the non-electrolytic in nature. In IR spectra, the comparison of shift in frequency of the complexes with the ligand reveals the coordination of donor atoms to the metal atom. The d-d transition of the metal complex provides information about the geometry of the complexes and the transitions are in good agreement for the proposed square pyramidal geometry for all the binuclear complexes. The ESR spectra provide further information to confirm the binuclear structure and the presence of magnetic interactions. The Schiff bases and their complexes have been screened for their in vitro antibacterial (staphylococcus aureus, bacillus subtilis, Eschericia coli and Klebsilla pneumonia) activity by paper disc method, it result confirms the binuclear complexes are more potent than free ligands.

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