Abstract
The reaction of L-ascorbic acid with the dichloroacetic acid in the presence of potassium hydroxide gave new product 3,4,6,7-O,O,O,O-tetrakis(carboxy(chloro)methyl)-L-ascorbic acid (H 4 L), which was isolated and characterized by 1 H, 13 C-NMR, elemental analysis (CHN), thermogravimetric analysis (TGA), UV-visible and Fourier Transform infrared (FTIR) methods. The complexes of the ligand (H 4 L) with metal ions, M +2 = (Cu, Co, Ni, Cd and Hg) were synthesized and characterized by FTIR, UV-Visible, molar conductance, atomic absorption, magnetic susceptibility, thermogravimetric analysis (TGA) and molar ratio methods. The analysis showed the evidence of binding of the metal ions with (H 4 L) through the bidendate carboxylato group manner resulting in six-coordinated metal ion. The TLC for (H 4 L) and complexes showed one spot for each indicating the purity of these compounds.
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