Characterization of Group 10-Metal-p-Substituted Phenoxyl Radical Complexes with Schiff Base Ligands

Hiromi Oshita, Misa Kikuchi, Kaoru Mieda, Takashi Ogura, Takayoshi Yoshimura, Fumito Tani, Tatsuo Yajima, Hitoshi Abe, Seiji Mori, Yuichi Shimazaki

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6 Citations (Scopus)

Abstract

Methylthiophenoxyl radical plays an important role as the active form of galactose oxidase (GO), which catalyzes oxidation of a primary alcohol to the corresponding aldehyde. Although many metal(II)-phenoxyl radical species have been reported, only a few studies have been reported on the properties of methylthiophenoxyl radical-metal complexes. We have prepared the group 10 metal (Ni, Pd and Pt) complexes of a salen-type ligand with a methylthio group at para-position of the two phenolate moieties and characterized them by X-ray crystal structure analyses and various spectroscopic methods in order to understand the role of the methylthio moiety in phenoxyl radical metal complexes. The corresponding p-methoxy substituted derivatives have been also characterized for comparison. All the one-electron oxidized group 10 metal methylthiophenolate complexes have a relatively localized radical site on one of the two phenolate moieties in comparison to the one-electron oxidized complexes of p-methoxy derivatives and exhibit different properties dependent on the central metal ions.

Original languageEnglish
Pages (from-to)10221-10231
Number of pages11
JournalChemistrySelect
Volume2
Issue number31
DOIs
Publication statusPublished - Jan 1 2017

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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    Oshita, H., Kikuchi, M., Mieda, K., Ogura, T., Yoshimura, T., Tani, F., Yajima, T., Abe, H., Mori, S., & Shimazaki, Y. (2017). Characterization of Group 10-Metal-p-Substituted Phenoxyl Radical Complexes with Schiff Base Ligands. ChemistrySelect, 2(31), 10221-10231. https://doi.org/10.1002/slct.201701986