alexa Abstract | Synthesis and characterization of a carboxylate bridged homodinuclear Co(II) complex: Crystal structure of [Co2(Pda)2(H2O)5]·2H2O (H2Pda = pyridine-2,6-dicorboxylic acid)
ISSN ONLINE(2319-8753)PRINT(2347-6710)

International Journal of Innovative Research in Science, Engineering and Technology
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Research Article Open Access


Functionalized dicarboxylic acids are potential candidates to act as chelating ligands in coordination chemistry since they have their own special characteristics of bonding to transition metal ions. Pyridine-2,6- dicarboxylic acid (H2Pda) is such a planar and versatile ligand for synthesizing a number of mono- and poly nuclear transition metal complexes. The homo dinuclear complex, [Co2(Pda)2(H2O)5]·2H2O is prepared and characterized using spectral and single crystal X-ray diffraction techniques. Analytical and ESI mass data are consistent with the proposed molecular stoichiometry of the complex. FTIR data confirmed the binding mode of the ligands to Co(II) ion. Crystal data [i.e., a = 8.353(5)), b = 27.164(5), c = 9.600(5) (Å), α = 90.00, β = 98.08(5) and γ = 90.00°] show that the complex crystallize in monoclinic systems with the space groups P21/c. Cyclic voltagammogram of the complex ascertain the presence of CoII‒CoIII quasi-reversible redox couple in solution.

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Author(s): Zafar A. Siddiqi, Istikhar A. Ansari, Farasha Sama, M. Shahid

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