A1 Refereed original research article in a scientific journal
An experimental and theoretical study of a heptacoordinated tungsten(VI) complex of a noninnocent phenylenediamine bis(phenolate) ligand
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: 93
First page : 149
Last page: 152
Number of pages: 4
ISSN: 1387-7003
eISSN: 1879-0259
DOI: https://doi.org/10.1016/j.inoche.2018.05.023
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/32081530
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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