Five-coordinate zinc(ii) complexes containing sterically demanding bio-mimetic n3s2 ligands. Syntheses, characterization and dft calculations

Shaban SAEFY, Puchta R, van Eldik R (2010)

Publication Type: Journal article

Publication year: 2010

Journal

Zeitschrift für Naturforschung Section B-A Journal of Chemical Sciences Verlag der Zeitschrift Fuer Naturforschung

Book Volume: 65

Pages Range: 251-257

Journal Issue: 3

DOI: 10.1515/znb-2010-0305

Abstract

In search of complexes having [ZnN3S2] cores in the monomeric form with trans-thiolate donor atoms, new sterically demanding tri- and pentadentate ligands containing biomimetic N3S2 cores have been synthesized. The reaction of bis(2-mercapto-3,5-di-tert-butylaniline) zinc(II) with 2,6-diacetylpyridine leads to the formation of the zinc imine [Zn(py^tBuN2Me2S2)] (3) which is stable and can be isolated and characterized in the solid state. Complex 3 can be converted to the zinc amine function [Zn(py^tBuN2H 2Me2S2)] (5) without losing the metal center using NaBH4 in methanol solution. On the other hand, complex 3 can be demetallated in an acidic medium to give the tridentate bis-benzothiazoline ligand 4. Alternatively, ligand 4 can be obtained via condensation of 3,5-di-tert-butylmercaptoaniline with 2,6-diacetylpyridine in a 2:1 molar ratio. Opening the bis-benzothiazoline ligand 4 either by reduction with NaBH 4 in methanol or by zinc acetate leads to the formation of the pentadentate dithiole-amine ligand py^tBuN2H 2Me2S2-H2 (6), and the zinc imine complex 3, respectively. Ligand 6 can also be obtained via demetallation of the zinc amine complex 5 in acidic medium. All compounds have been characterized using spectroscopic methods and elemental analysis, and also by using DFT (B3LYP/6-31G) calculations in combination with experimental NMR data. © 2010 Verlag der Zeitschrift für Naturforschung, Tübingen.

Authors with CRIS profile

Ralph Puchta Department Chemie und Pharmazie Rudi van Eldik Naturwissenschaftliche Fakultät

How to cite

APA:

Shaban, S.A.E.F.Y., Puchta, R., & van Eldik, R. (2010). Five-coordinate zinc(ii) complexes containing sterically demanding bio-mimetic n3s2 ligands. Syntheses, characterization and dft calculations. Zeitschrift für Naturforschung Section B-A Journal of Chemical Sciences, 65(3), 251-257. https://doi.org/10.1515/znb-2010-0305

MLA:

Shaban, Shaban Abd El Fattah Youssef, Ralph Puchta, and Rudi van Eldik. "Five-coordinate zinc(ii) complexes containing sterically demanding bio-mimetic n3s2 ligands. Syntheses, characterization and dft calculations." Zeitschrift für Naturforschung Section B-A Journal of Chemical Sciences 65.3 (2010): 251-257.

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