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Spectral, Thermal, X-Ray Diffraction and Antimicrobial Studies of some Bivalent Metal Chelates of Juglone

Author(s): A. B. Pawar, S. R. Bamane, K. D. Jadhav and R. G. Sarawadekar

Five metal chelates of the type M [Jg] 2 where M = Zn, Cd, Hg, Sn and Pb and Jg = 5-hydroxy-1, 4-naphthoquinone (Juglone) have been synthesized. All chelates have been characterized by modern methods such as elemental analysis, FTIR, X- ray diffraction, Electronic spectra, Thermogravimetry, Differential thermal analysis and electron microscopy with EDAX analysis. All chelates are found to be colored. These chelates are thermally stable up to 500oC and all are crystallite in nature and the crystallographic parameters are calculated, which shows that these crystals belong to triclinic. The particle size of Jg, Zn-Jg and Pb-Jg is 104, 52 and 39 nm, respectively. The ligand and the metal chelates have been screened for antimicrobial activity on Gram positive, Gram negative and antifungal activity and results are compared with standard cisplatin compound. The results are encouraging.

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