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Ni(II), Co(II) and Mn(II) tris(pyrazolyl)borate complexes with 2,6-di- tert-butyl-4-carboxy-phenol: Formation of coordinated phenoxyl radical
Journal article   Peer reviewed

Ni(II), Co(II) and Mn(II) tris(pyrazolyl)borate complexes with 2,6-di- tert-butyl-4-carboxy-phenol: Formation of coordinated phenoxyl radical

Anastasiya V. Yakovenko, Sergey V. Kolotilov, Anthony W. Addison, Swiatoslaw Trofimenko, Glenn P.A. Yap, Victoria Lopushanskaya and Vitaly V. Pavlishchuk
Inorganic chemistry communications, v 8(10), pp 932-935
2005

Abstract

3d-metals ESR spectra Phenoxyl radical Redox properties Tris(pyrazolyl)borates X-ray structure
It was found that coordination of Ni and Co complexes to 2,6-di- tert-butyl-4-carboxy-phenoxyl led to stabilization of this radical. Ni(II), Co(II) and Mn(II) tris(pyrazolyl)borate complexes with 2,6-di- tert-butyl-4-carboxy-phenol were synthesized and characterized crystallographically (Ni and Co complexes), spectroscopically and electrochemically. It was found that oxidation of Ni and Co complexes resulted in the formation of coordinated phenoxyl radical and diphenoquinone, whereas only quinone formed in the case of Mn complex and free 2,6-di- tert-butyl-4-carboxy-phenol.

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Chemistry, Inorganic & Nuclear
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