Electrochemistry of nickel(II) complexes with N,N'-bis(3,5-di-tert-butylsalicylidene)polymethylenediamines

Date

2005-10-03

Author

Ozalp-Yaman, S
Kasumov, VT
Önal, Ahmet Muhtar

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The electrochemical oxidation of several N,N'-polymethylenebis(3,5-di-tert- butylsalicylaldiminato)nickel(II) complexes, Ni(L-x), has been studied by cyclic voltammetry and in situ UV-Vis spectroscopy in DMF Cyclic voltammograms of Ni(L-x) (x = 1-4) complexes displayed two-step oxidation processes under nitrogen gas atmosphere. The first oxidation peak potentials of all the Ni(II) complexes corresponds to the reversible one-electron oxidation process of the metal center, yielding Ni(III) species. EPR spectrum of the electrolysis solution was recorded after one electron transfer at liquid nitrogen temperature also confirms the formation of [Ni-III (L-3)](+) species (g(x) > g(y) > g(z)) with a (2)A(1)(d(z)(2))(1) ground state. Upon addition of pyridine to one electron oxidised solutions a new penta coordinated species, [Ni-III(L-3)Py](+) (g(perpendicular to) > g(parallel to), a(parallel to)(N-14) = 8 G), was produced. The second oxidation peak of the complexes was assigned as the ligand based oxidation, generating a coordinated phenoxy radical species.

Subject Keywords

Physical and Theoretical Chemistry, Inorganic Chemistry, Materials Chemistry

URI

https://hdl.handle.net/11511/36435

Journal

POLYHEDRON

DOI

https://doi.org/10.1016/j.poly.2005.05.024

Collections

Department of Chemistry, Article

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Citation Formats

S. Ozalp-Yaman, V. Kasumov, and A. M. Önal, “Electrochemistry of nickel(II) complexes with N,N’-bis(3,5-di-tert-butylsalicylidene)polymethylenediamines,” POLYHEDRON, pp. 1821–1828, 2005, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/36435.