X-ray photoelectron spectra of tetraaza macrocyclic complexes of cobalt with molecular oxygen |
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Authors: | Yu. I. Bratushko A. B. Kondratyuk A. O. Senkevich K. B. Yatsimirskii V. V. Nemoshkalenko |
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Affiliation: | (1) L. V. Pisarzhevskii Institute of Chemistry, Academy of Sciences of the Ukrainian SSR, Kiev |
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Abstract: | X-ray photoelectron spectroscopy has been used to determine the electronic state of the cobalt-molecular-oxygen fragment, the type of coordination, and, in some cases, the nature of the bond between the central ion and the axial ligand in the complexes [CoII(htd)(NCS))C104, [-O2{Co(htd((X)}2](ClO4)2 (X=NCS–, N3–, NCO–, OH–), and [O2{Co(htd)(Im)}2](ClO4)4. It has been established that the NCO– and NCS– ligands are coordinated as electron donors in an axial position by means of their nitrogen atoms. A conclusion regarding the electronic structure of the CoIII-O22–-CoIII fragment has been drawn on the basis of an analysis of the binding energy (Eb) of the Co 2p3/2 electrons in the oxygenated complexes and in the corresponding low-spin cobalt(II) compounds and cobalt(III) compounds.Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 26, No. 4, pp. 437–442, July–August, 1990. |
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