Synthesis, structure and catecholase-like activity of a new dicopper(II) complex with benzoylacetonate ligand

J. Kaizer, Róbert Csonka, G. Speier, Michel Giorgi, Marius Réglier

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The preparation and characterization of tetranuclear Cu4(bnac) 4(μ-OEt)4 complex is described. Crystallographic characterization of this complex has shown that the co-ordination geometry around copper(II) ions is distorted square pyramidal (monoclinic, C2/c, a = 13.3980(2) Å, b = 14.6080(2) Å, c = 25.7460(4) Å, α = 90.00°, β = 103.4090(10)°, γ = 90.00°, V = 4901.59(13) Å3, Z = 8). The in situ-generated Cu2(bnac) 2(μ-OEt)4(4R-py)4 complexes were suitable catalysts for the catalytic oxidation of 3,5-DTBCH2 to 3,5-DTBQ with dioxygen at ambient condition in good yields. The catalytic activity was found to obey Michaelis-Menten type kinetics and increase with electron-releasing substituent on co-ordinated pyridines.

Original languageEnglish
Pages (from-to)81-87
Number of pages7
JournalJournal of Molecular Catalysis A: Chemical
Volume235
Issue number1-2
DOIs
Publication statusPublished - Jul 1 2005

Fingerprint

Ligands
Pyridines
ligands
Catalytic oxidation
releasing
synthesis
Pyridine
catalytic activity
Copper
Catalyst activity
pyridines
Ions
Oxygen
catalysts
copper
preparation
oxidation
Catalysts
Kinetics
Geometry

Keywords

  • Catecholase activity
  • Copper
  • Oxygenation
  • X-ray structure

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Materials Science (miscellaneous)

Cite this

Synthesis, structure and catecholase-like activity of a new dicopper(II) complex with benzoylacetonate ligand. / Kaizer, J.; Csonka, Róbert; Speier, G.; Giorgi, Michel; Réglier, Marius.

In: Journal of Molecular Catalysis A: Chemical, Vol. 235, No. 1-2, 01.07.2005, p. 81-87.

Research output: Contribution to journalArticle

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AU - Kaizer, J.

AU - Csonka, Róbert

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AU - Giorgi, Michel

AU - Réglier, Marius

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N2 - The preparation and characterization of tetranuclear Cu4(bnac) 4(μ-OEt)4 complex is described. Crystallographic characterization of this complex has shown that the co-ordination geometry around copper(II) ions is distorted square pyramidal (monoclinic, C2/c, a = 13.3980(2) Å, b = 14.6080(2) Å, c = 25.7460(4) Å, α = 90.00°, β = 103.4090(10)°, γ = 90.00°, V = 4901.59(13) Å3, Z = 8). The in situ-generated Cu2(bnac) 2(μ-OEt)4(4R-py)4 complexes were suitable catalysts for the catalytic oxidation of 3,5-DTBCH2 to 3,5-DTBQ with dioxygen at ambient condition in good yields. The catalytic activity was found to obey Michaelis-Menten type kinetics and increase with electron-releasing substituent on co-ordinated pyridines.

AB - The preparation and characterization of tetranuclear Cu4(bnac) 4(μ-OEt)4 complex is described. Crystallographic characterization of this complex has shown that the co-ordination geometry around copper(II) ions is distorted square pyramidal (monoclinic, C2/c, a = 13.3980(2) Å, b = 14.6080(2) Å, c = 25.7460(4) Å, α = 90.00°, β = 103.4090(10)°, γ = 90.00°, V = 4901.59(13) Å3, Z = 8). The in situ-generated Cu2(bnac) 2(μ-OEt)4(4R-py)4 complexes were suitable catalysts for the catalytic oxidation of 3,5-DTBCH2 to 3,5-DTBQ with dioxygen at ambient condition in good yields. The catalytic activity was found to obey Michaelis-Menten type kinetics and increase with electron-releasing substituent on co-ordinated pyridines.

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KW - Copper

KW - Oxygenation

KW - X-ray structure

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