Mechanism of reduction of the nitrite ion by CuI complexes

Ariela Burg; Evgenia Lozinsky; Haim Cohen; Dan Meyerstein

doi:10.1002/ejic.200400255

Mechanism of reduction of the nitrite ion by Cu^I complexes

Ariela Burg, Evgenia Lozinsky, Haim Cohen, Dan Meyerstein

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

The reaction of Cu_aq⁺ with NO₂^- was studied. The results are consistent with the mechanism: Cu _aq⁺ NO₂^- ⇆ (Cu ⁺NO₂^-), K = 140 ± 30 M^-1; (Cu⁺NO₂^-) + H⁺ → Cu ²⁺ + NO + OH^-, k = 4.6 × 10⁵ M ^-1S^-1. It is proposed that the copper is bound to the nitrogen in the transient complex (Cu⁺NO₂^-), In addition, the reaction was studied with (Cu^ILⁱ) ⁺ complexes. The results show that the ligands reduce the value of K and that their effect on k depends on the redox potential of the (Cu ^II/ILⁱ) couple. This reaction is the simplest model for the CuNIR (NIR = Nitric reductase) enzymes.

Original language	English
Pages (from-to)	3675-3680
Number of pages	6
Journal	European Journal of Inorganic Chemistry
Issue number	18
DOIs	https://doi.org/10.1002/ejic.200400255
State	Published - 20 Sep 2004
Externally published	Yes

Keywords

Copper(I)
NO
Nitrite
Reduction

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title = "Mechanism of reduction of the nitrite ion by CuI complexes",

abstract = "The reaction of Cuaq+ with NO2- was studied. The results are consistent with the mechanism: Cu aq+ NO2- ⇆ (Cu +NO2-), K = 140 ± 30 M-1; (Cu+NO2-) + H+ → Cu 2+ + NO + OH-, k = 4.6 × 105 M -1S-1. It is proposed that the copper is bound to the nitrogen in the transient complex (Cu+NO2-), In addition, the reaction was studied with (CuILi) + complexes. The results show that the ligands reduce the value of K and that their effect on k depends on the redox potential of the (Cu II/ILi) couple. This reaction is the simplest model for the CuNIR (NIR = Nitric reductase) enzymes.",

keywords = "Copper(I), NO, Nitrite, Reduction",

author = "Ariela Burg and Evgenia Lozinsky and Haim Cohen and Dan Meyerstein",

year = "2004",

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doi = "10.1002/ejic.200400255",

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TY - JOUR

T1 - Mechanism of reduction of the nitrite ion by CuI complexes

AU - Burg, Ariela

AU - Lozinsky, Evgenia

AU - Cohen, Haim

AU - Meyerstein, Dan

PY - 2004/9/20

Y1 - 2004/9/20

N2 - The reaction of Cuaq+ with NO2- was studied. The results are consistent with the mechanism: Cu aq+ NO2- ⇆ (Cu +NO2-), K = 140 ± 30 M-1; (Cu+NO2-) + H+ → Cu 2+ + NO + OH-, k = 4.6 × 105 M -1S-1. It is proposed that the copper is bound to the nitrogen in the transient complex (Cu+NO2-), In addition, the reaction was studied with (CuILi) + complexes. The results show that the ligands reduce the value of K and that their effect on k depends on the redox potential of the (Cu II/ILi) couple. This reaction is the simplest model for the CuNIR (NIR = Nitric reductase) enzymes.

AB - The reaction of Cuaq+ with NO2- was studied. The results are consistent with the mechanism: Cu aq+ NO2- ⇆ (Cu +NO2-), K = 140 ± 30 M-1; (Cu+NO2-) + H+ → Cu 2+ + NO + OH-, k = 4.6 × 105 M -1S-1. It is proposed that the copper is bound to the nitrogen in the transient complex (Cu+NO2-), In addition, the reaction was studied with (CuILi) + complexes. The results show that the ligands reduce the value of K and that their effect on k depends on the redox potential of the (Cu II/ILi) couple. This reaction is the simplest model for the CuNIR (NIR = Nitric reductase) enzymes.

KW - Copper(I)

KW - NO

KW - Nitrite

KW - Reduction

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JO - European Journal of Inorganic Chemistry

JF - European Journal of Inorganic Chemistry

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Mechanism of reduction of the nitrite ion by Cu^I complexes

Abstract

Keywords

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