An experimental and theoretical study of a heptacoordinated tungsten(VI) complex of a noninnocent phenylenediamine bis(phenolate) ligand
Ari Lehtonen; Ebbe Nordlander; George C. Lisensky; Matti Haukka; Md. Kamal Hossain; Mikko M. Hänninen; Petriina Paturi
An experimental and theoretical study of a heptacoordinated tungsten(VI) complex of a noninnocent phenylenediamine bis(phenolate) ligand
Ari Lehtonen
Ebbe Nordlander
George C. Lisensky
Matti Haukka
Md. Kamal Hossain
Mikko M. Hänninen
Petriina Paturi
ELSEVIER SCIENCE BV
Julkaisun pysyvä osoite on:
https://urn.fi/URN:NBN:fi-fe2021042719357
https://urn.fi/URN:NBN:fi-fe2021042719357
Tiivistelmä
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.
Kokoelmat
- Rinnakkaistallenteet [19207]