SYNTHESIS AND SPECTRAL STUDIES OF METAL COMPLEXES WITH 3,4,6,7-O,O,O,O-TETRAKIS-(CARBOXY(CHLORO)METHYL)-L-ASCORBIC ACID (H4L)

Salah M Fizea, Falih H Musa

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 (H4L), which was isolated and characterized by 1H,13C-NMR, elemental analysis (CHN), thermogravimetric analysis (TGA), UV-visible and Fourier Transform infrared (FTIR) methods. The complexes of the ligand (H4L) 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 (H4L) through the bidendate carboxylato group manner resulting in six-coordinated metal ion. The TLC for (H4L) and complexes showed one spot for each indicating the purity of these compounds.


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DOI: http://dx.doi.org/10.17628/ecb.2014.3.915-919

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