A new approach to the study of the oxygenation reactions of transition-metal complexes. Formation of the μ-superoxo cobalt(III) complexes in the oxygenation reactions of cobalt(II) amines

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Abstract

In the reactions of molecular oxygen with cobalt(II) amines, formation of μ-superoxo complexes has been identified on photolysis of cobalt(III) amine complexes [Co(trien)(NO2)2]ClO4 (1) and [Co(tetraen)(NO2)](ClO4)2 (2) in oxygen-saturated aqueous solution. The kinetics of oxygenation reactions has been followed by flash photolyzing the complexes 1 and 2 in aqueous and nonaqueous solvents and the rate constants for the formation of mononuclear superoxo complex and the μ-superoxo dinuclear complex has been determined at 25 ± 1°C. Photochemical routes for the preparation of μ-superoxo cobalt(III) complexes are suggested from this study.

Original languageEnglish
Pages (from-to)4621-4624
Number of pages4
JournalJournal of the American Chemical Society
Volume114
Issue number12
Publication statusPublished - 1992
Externally publishedYes

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Oxygenation
Coordination Complexes
Metal complexes
Cobalt
Amines
Transition metals
Oxygen
Molecular oxygen
Photolysis
Rate constants
Kinetics
perchlorate

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

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title = "A new approach to the study of the oxygenation reactions of transition-metal complexes. Formation of the μ-superoxo cobalt(III) complexes in the oxygenation reactions of cobalt(II) amines",
abstract = "In the reactions of molecular oxygen with cobalt(II) amines, formation of μ-superoxo complexes has been identified on photolysis of cobalt(III) amine complexes [Co(trien)(NO2)2]ClO4 (1) and [Co(tetraen)(NO2)](ClO4)2 (2) in oxygen-saturated aqueous solution. The kinetics of oxygenation reactions has been followed by flash photolyzing the complexes 1 and 2 in aqueous and nonaqueous solvents and the rate constants for the formation of mononuclear superoxo complex and the μ-superoxo dinuclear complex has been determined at 25 ± 1°C. Photochemical routes for the preparation of μ-superoxo cobalt(III) complexes are suggested from this study.",
author = "Dhanasekaran Thirunavukkarasu and P. Natarajan",
year = "1992",
language = "English",
volume = "114",
pages = "4621--4624",
journal = "Journal of the American Chemical Society",
issn = "0002-7863",
publisher = "American Chemical Society",
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T1 - A new approach to the study of the oxygenation reactions of transition-metal complexes. Formation of the μ-superoxo cobalt(III) complexes in the oxygenation reactions of cobalt(II) amines

AU - Thirunavukkarasu, Dhanasekaran

AU - Natarajan, P.

PY - 1992

Y1 - 1992

N2 - In the reactions of molecular oxygen with cobalt(II) amines, formation of μ-superoxo complexes has been identified on photolysis of cobalt(III) amine complexes [Co(trien)(NO2)2]ClO4 (1) and [Co(tetraen)(NO2)](ClO4)2 (2) in oxygen-saturated aqueous solution. The kinetics of oxygenation reactions has been followed by flash photolyzing the complexes 1 and 2 in aqueous and nonaqueous solvents and the rate constants for the formation of mononuclear superoxo complex and the μ-superoxo dinuclear complex has been determined at 25 ± 1°C. Photochemical routes for the preparation of μ-superoxo cobalt(III) complexes are suggested from this study.

AB - In the reactions of molecular oxygen with cobalt(II) amines, formation of μ-superoxo complexes has been identified on photolysis of cobalt(III) amine complexes [Co(trien)(NO2)2]ClO4 (1) and [Co(tetraen)(NO2)](ClO4)2 (2) in oxygen-saturated aqueous solution. The kinetics of oxygenation reactions has been followed by flash photolyzing the complexes 1 and 2 in aqueous and nonaqueous solvents and the rate constants for the formation of mononuclear superoxo complex and the μ-superoxo dinuclear complex has been determined at 25 ± 1°C. Photochemical routes for the preparation of μ-superoxo cobalt(III) complexes are suggested from this study.

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