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Complexation of metal ions with 3,5-di-tert-butyl-1,2-benzoquinone-1-monooxime, ESR studies of radical intermediates

Date

2001

Author

Kasumov, VT
Tas, E
Kartal, I
Ucun, F
Koksal, F
Cukurovali, A

Metadata

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Abstract

The possibility of chelate formation of 3,5-di-tert-butyl-o-benzoquinone-1-monooxime with Cu(II), Co(II), Ni(II), Mn(II), Pd(II) metal ions under N-2 and in air have been investigated. It was found that complexation of metals except Cu(II) and Mn(II) was accompanied by formation of various stable radical species under air. The complexation of Co(II) even under N-2 unlike other metal ions, results in the formation of very stable radical species, which are assigned to phenazinyl type radical. ESR examination of reduction of bis(3,5-di-tert-butyl-o-benzoquinone-1-monooximato)M(II) (M = Cu, Pd,) with triarylphosphines P(C6H4X)(3) (X = H, m-Cl, m-CH3, p-Et2N) reveal the formation of the N-(2-hydroxy-3,5-di-tertbutylphenyl)-4', 6'-di-tertbutyl-o-benzosemiquinone iminate radical. Finally, ESR spectra of Cu(II), Ni(II), and Mn(II) complexes at 300 and 130 K, as well as reaction of bis(oximato)Ni(II) with PPh3 have been studied.

Source

Journal of Coordination Chemistry

Volume

52

Issue

3

URI

https://doi.org/10.1080/00958970108022588
https://hdl.handle.net/20.500.12712/22245

Collections

  • Scopus İndeksli Yayınlar Koleksiyonu [14046]
  • WoS İndeksli Yayınlar Koleksiyonu [12971]



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