Green & Efficient Synthesis, Spectroscopic Characterisation of Tridentate Schiff Base and its Metal Complexes
European Journal of Molecular & Clinical Medicine,
2016, Volume 3, Issue 1, Pages 62-73
AbstractSchiff base and its metal complexes have been synthesized by both Conventional Thermal Irradiation Technique (CTIT) as well as Micro Wave Thermal Irradiation Technique (MWTIT). later technique was found to be simple, quick, green, synthetic, pollution free and economically viable as compare to traditional one. This new green protocol involves one pot approach. Schiff base is prepared from the condensation of Anthranilic acid and Salicylaldehyde but in microwave assisted condensation in the absence of solvent is found a more efficient process to form a potentially tridentate Schiff base in solid state. This compound is versatile in forming well-defined complexes with transition metal (II) chloride. Schiff base ligand and its metal complexes have been characterized using various physicochemical techniques viz; elemental analysis, molecular weight determination, IR,1HNMR, magnetic susceptibility measurement, molar conductance and ESR analysis. The analytical and spectral data showed that ligand acts as neutral tridentate with ONO donor sequence towards the transition metal(II) ions forming complexes of type [MLXn] where M =Mn(II),Fe(II),Co(II),Ni(II),Cu(II), Zn(II),Cd(II) and Hg(II),L=C14H9NO3,X= H2O and n =2-3.The complexes possessed 1:1 metal-ligand ratio. ESR studies of Mn (II) complex explored the square pyramidal shape whereas other exist in octahedral and tetrahedral crystalline form.
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