Rapid cross-disproportionation between superoxometal ions and acylperoxyl radicals

被引：9

作者：

Bakac, A ^{[1
]}

机构：

[1] Iowa State Univ, Ames Lab, Ames, IA 50011 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2002年 / 124卷 / 15期

关键词：

D O I：

10.1021/ja025507j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A superoxochromium complex CraqOO2+ reacts with acetylperoxyl radicals, CH3C(O)OO•, with a rate constant of 1.49 × 108 M-1 s-1. The kinetics were determined by laser flash photolysis, using an organocobalt complex as a radical precursor and ABTS•- as a kinetic probe. The initial step is believed to involve radical coupling at the remote oxygen of CraqOO2+, followed by elimination of O2 and formation of CH3COOH and CrVaqO3+. The latter disproportionates and ultimately yields Craq3+ and HCrO4-. Copyright © 2002 American Chemical Society.

引用

页码：3816 / 3817

页数：2

共 13 条

[1] Hydrogen atom abstraction by metal-oxo and metal-superoxo complexes: Kinetics and thermodynamics [J].

Bakac, A .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2000, 122 (06) :1092-1097

[2] EVIDENCE FOR A BOND HOMOLYSIS PATHWAY FOR O2 RELEASE IN THE DECOMPOSITION OF THE SUPEROXOCHROMIUM(III) ION CRO22+ [J].

BRYNILDSON, ME ;

BAKAC, A ;

ESPENSON, JH .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1987, 109 (15) :4579-4583

[3] RATE CONSTANTS FOR SOME RADICAL RADICAL CROSS-REACTIONS AND THE GEOMETRIC MEAN RULE [J].

GARLAND, LJ ;

BAYES, KD .

JOURNAL OF PHYSICAL CHEMISTRY, 1990, 94 (12) :4941-4945

[4]

HOWARD JA, 1997, PEROXYL RADICALS, P283

[5] ELECTROCHEMICAL PROPERTIES OF THE UNSTABLE COMPLEXES OF CHROMIUM(III) WITH SUPEROXIDE AND HYDROPEROXIDE ANIONS AND WITH DIOXYGEN [J].

KANG, C ;

ANSON, FC .

INORGANIC CHEMISTRY, 1994, 33 (12) :2624-2630

[6] Kinetics of the reactions of n-alkyl (C2H5, n-C3H7, and n-C4H9) radicals with CH3 [J].

Knyazev, VD ;

Slagle, IR .

JOURNAL OF PHYSICAL CHEMISTRY A, 2001, 105 (26) :6490-6498

[7] ONE-ELECTRON AND 2-ELECTRON REDUCTION POTENTIALS OF PEROXYL RADICALS AND RELATED SPECIES [J].

MERENYI, G ;

LIND, J ;

ENGMAN, L .

JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2, 1994, (12) :2551-2553

[8] Reaction of a superoxochromium(III) ion with nitrogen monoxide: Kinetics and mechanism [J].

Nemes, A ;

Pestovsky, O ;

Bakac, A .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2002, 124 (03) :421-427

[9] Disproportionation of aquachromyl(IV) ion by hydrogen abstraction from coordinated water [J].

Nemes, A ;

Bakac, A .

INORGANIC CHEMISTRY, 2001, 40 (12) :2720-2724

[10] RATE CONSTANTS FOR REACTIONS OF PEROXYL RADICALS IN FLUID SOLUTIONS [J].

NETA, P ;

HUIE, RE ;

ROSS, AB .

JOURNAL OF PHYSICAL AND CHEMICAL REFERENCE DATA, 1990, 19 (02) :413-513

← 1 2 →