Abstract
The metal(II) ion complexes of a tetradentate ligand L , namely bis[O,O-2,4;O,O-6,7(thiocyanatecarboxylic methyliden)]L-ascorbic acid are synthesized and characterized by 1 H, 13 C-NMR, elemental analysis (CHN), mass spectroscopy , UV-visible and Fourier Transform infrared (FTIR) methods. This ligand is prepared from the reaction of L-ascorbic acid and two moles of trichloroacetic acid in basic media (compound I) with two moles of potassium thiocyanate. The reaction of ( L) in ethanol with MCl 2 .xH 2 O gave complexes with the general formula [M(L)Cl 2 ] (where M= Ni(II), Cu(II) and Zn(II), respectively) characterized by FTIR, UV-Visible, molar conductance, atomic absorption, magnetic susceptibility. The analysis of IR, spectral data of all complexes propose that L is bonded to metal(II) ions through the two nitrogen atoms of thiocyanate groups and two oxygen atoms of hydroxyl moieties. The synthesized complexes were proposed to be octahedral in geometry. Among these complexes, the Zn(II) complex demonstrated good antibacterial activity.
Highlights
Physical and spectral measurementsL-Ascorbic acid (Vitamin C) is an essential nutritious substance for human body participating in many different biological processes
The metal(II) ion complexes of a tetradentate ligand (L), namely bis[O,O-2,4-O,O-6,7-(thiocyanatecarboxylic methylidene)]-L-ascorbic acid are synthesized and characterized by 1H,13C-NMR, elemental analysis (CHN), mass spectroscopy, UV-visible and Fourier Transform infrared (FTIR) methods. This ligand is prepared from the reaction of the L-ascorbic acid and two moles of trichloroacetic acid in basic medium with two moles of potassium thiocyanate
The synthesized complexes were proposed to be octahedral in geometry
Summary
The metal(II) ion complexes of a tetradentate ligand (L), namely bis[O,O-2,4-O,O-6,7-(thiocyanatecarboxylic methylidene)]-L-ascorbic acid are synthesized and characterized by 1H,13C-NMR, elemental analysis (CHN), mass spectroscopy, UV-visible and Fourier Transform infrared (FTIR) methods. This ligand is prepared from the reaction of the L-ascorbic acid and two moles of trichloroacetic acid in basic medium (compound I) with two moles of potassium thiocyanate. The synthesized complexes were proposed to be octahedral in geometry. Among these complexes, the Zn(II) complex demonstrated good antibacterial activity.
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