Multinuclear NMR Spectroscopic Characterization of Co(III) Species: Key Intermediates of Cobalt Catalyzed Autoxidation Full article
Journal |
Journal of Molecular Catalysis A: Chemical
ISSN: 1381-1169 |
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Output data | Year: 1998, Volume: 130, Number: 1-2, Pages: 131-137 Pages count : 7 DOI: 10.1016/S1381-1169(97)00207-0 | ||||
Tags | 59Co NMR spectroscopy, Catalytic oxidation, Co(III) acetate | ||||
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Abstract:
Using Full-size image (<1 K), Full-size image (<1 K) and Full-size image (<1 K) NMR spectroscopies, it was shown that, the so-called `Co(III) acetate'-reactive intermediate of cobalt acetate catalyzed autoxidation, is the mixture of the oxo-centered trinuclear cations [Co3O(OAc)6(AcOH)3]+ (I) and [Co3O(OAc)5(OH)(AcOH)3]+ (II) in 1:3–1:2 ratio. Cations I and II are the major species in the freshly prepared solutions of Co(III) acetate in CH2Cl2 and AcOH. Immediately after dissolving in MeOH, I converts into cation [Co3O(OAc)5(OMe)(MeOH)3]+ and II into cation [Co3O(OAc)5(OH)(MeOH)3]+. Reactivity of I and II towards p-xylene was determined. The addition of p-xylene to the sample containing I and II under anaerobic conditions in CH2Cl2 (1:3 p-xylene/CH2Cl2 by volume, 293 K) gave rise to gradual decrease of their concentration. The half-life was 2 h for cation II and 1.3 h for cation I.
Cite:
Babushkin D.E.
, Talsi E.P.
Multinuclear NMR Spectroscopic Characterization of Co(III) Species: Key Intermediates of Cobalt Catalyzed Autoxidation
Journal of Molecular Catalysis A: Chemical. 1998. V.130. N1-2. P.131-137. DOI: 10.1016/S1381-1169(97)00207-0 WOS Scopus РИНЦ
Multinuclear NMR Spectroscopic Characterization of Co(III) Species: Key Intermediates of Cobalt Catalyzed Autoxidation
Journal of Molecular Catalysis A: Chemical. 1998. V.130. N1-2. P.131-137. DOI: 10.1016/S1381-1169(97)00207-0 WOS Scopus РИНЦ
Dates:
Submitted: | Oct 16, 1996 |
Accepted: | Sep 9, 1997 |
Published print: | Mar 12, 1998 |
Published online: | Jan 25, 1999 |
Identifiers:
Web of science | WOS:000073456800014 |
Scopus | 2-s2.0-0032510523 |
Elibrary | 13280545 |
Chemical Abstracts | 1998:220718 |
Chemical Abstracts (print) | 129:4390 |
OpenAlex | W2016593561 |