Issue 15, 2005

Synthesis, structure and spectroscopy of new thiopyrone and hydroxypyridinethione transition-metal complexes

Abstract

The coordination chemistry of several O,S mixed donor ligands, namely thiopyrone and hydroxypyridinethione chelators, with a variety of middle and late first-row transition-metal ions is described. Complexes of 3-hydroxy-2-methyl-4-thiopyrone (thiomaltol) with cobalt(II), copper(II) and zinc(II); 3-hydroxy-1,2-dimethyl-4(1H)-pyridinethione (3,4-HOPTO) with iron(III), nickel(II), copper(II) and zinc(II); and 3-hydroxy-1-methyl-2(1H)-pyridinethione (3,2-HOPTO) with iron(III), nickel(II), copper(II) and zinc(II) have been synthesized and characterized. The structures, absorbance spectroscopy, cyclic voltammetry and superconducting quantum interferometer device (SQUID) measurements of selected metal complexes, as well as ligand protonation constants, are reported. Most of the metal complexes show coordination geometries indicative of a strong trans influence by the O,S chelators. The data presented herein provide the most detailed study of the transition-metal coordination chemistry of both thiopyrone and hydroxypyridinethione O,S donor ligands to date, and provide the basis for the investigation of these ligands in realm of biological inorganic chemistry.

Graphical abstract: Synthesis, structure and spectroscopy of new thiopyrone and hydroxypyridinethione transition-metal complexes

Supplementary files

Article information

Article type
Paper
Submitted
11 Apr 2005
Accepted
03 Jun 2005
First published
23 Jun 2005

Dalton Trans., 2005, 2588-2596

Synthesis, structure and spectroscopy of new thiopyrone and hydroxypyridinethione transition-metal complexes

J. A. Lewis, B. L. Tran, D. T. Puerta, E. M. Rumberger, D. N. Hendrickson and S. M. Cohen, Dalton Trans., 2005, 2588 DOI: 10.1039/B505034K

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