Abstract
New bis-chelated ZnII and CdII complexes of empirical formula, [M(mpsme)2] (mpsme=the anionic form of the tridentate ONS donor ligand formed from methylpyruvate and S-methyldithiocarbazate) have been prepared and characterized by conductance, i.r., electronic and n.m.r. spectroscopic techniques. Spectral evidence supports a six-coordinate distorted octahedral structure for these complexes. X-ray crystallographic structural analysis also confirms that, in both the [Zn(mpsme)2] and [Cd(mpsme)2] complexes, the methylpyruvate Schiff base of S-methyldithiocarbazate is coordinated to the metal ions as a uninegatively charged tridentate ONS chelating agent via the carbonyl oxygen atom, the azomethine nitrogen atom and the thiolate sulfur atom. Both complexes are assigned a distorted octahedral geometry in which the ligands are arranged meridionally around the metal ions. The distortion from regular octahedral geometry is attributable to the restricted bite angles of the ligand.
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Akbar ali, M., Huq mirza, A. & Ai Fong, G. Synthesis, characterization and X-ray crystal structures of the bis–ligand zinc(II) and cadmium(II) complexes of the methylpyruvate Schiff base of S-methyldithiocarbazate. Transition Metal Chemistry 29, 613–619 (2004). https://doi.org/10.1007/s11243-004-2511-7
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DOI: https://doi.org/10.1007/s11243-004-2511-7