A1 Journal article – refereed
An experimental and theoretical study of a heptacoordinated tungsten(VI) complex of a noninnocent phenylenediamine bis(phenolate) ligand




List of Authors: Md. Kamal Hossain, Matti Haukka, Mikko M. Hänninen, George C. Lisensky, Petriina Paturi, Ebbe Nordlander, Ari Lehtonen
Publisher: ELSEVIER SCIENCE BV
Publication year: 2018
Journal: Inorganic Chemistry Communications
Journal name in source: INORGANIC CHEMISTRY COMMUNICATIONS
Journal acronym: INORG CHEM COMMUN
Volume number: 93
Number of pages: 4
ISSN: 1387-7003
eISSN: 1879-0259

Abstract
W(N2O2)(HN2O2)] (H4N2O2 = N,N'-bis(3,5-di-tert-butyl-2-hydroxyphenyl)-1,2-phenylenediamine) with a noninnocent ligand was formed by reaction of the alkoxide precursor [W(eg)(3)] (eg = the 1,2-ethanediolate dianion) with two equivalents of ligand. The phenol groups on one of the ligands are completely deprotonated and the ligand coordinates in a tetradentate fashion, whereas the other ligand is tridentate with one phenol having an intact OH group. The molecular structure, magnetic measurements, EPR spectroscopy, and density functional theory calculations indicate that the complex is a stable radical with the odd electron situated on the tridentate amidophenoxide ligand. The formal oxidation state of the metal center is W(VI), with the paramagnetic properties being due to the unpaired electron on the ligand.

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Last updated on 2019-20-07 at 07:49