Read e-book online Oxidation and antioxidants in organic chemistry and biology PDF

By Evgeny T. Denisov, Igor B. Afanas'ev

ISBN-10: 0824753569

ISBN-13: 9780824753566

Supplying a accomplished assessment of reactions of oxidation for various sessions of natural compounds and polymers, and organic techniques mediated through loose radicals, Oxidation and Antioxidants in natural Chemistry and Biology places the information and bibliographical details you wish into one easy-to-use source. you'll find up to date information regarding mechanisms of motion of antioxidants, their reactivity, reactions of intermediates, synergism, and antioxidants with cyclic mechanism motion. providing helpful, quantitative facts in tables that make the knowledge effortless to discover, the authors spotlight the peculiarities of mechanisms taken with the oxidation of hydrocarbons, polymers, and various natural compounds. The ebook presents tabulated values of strengths of C-H bonds of oxygen-containing compounds; of O-H bonds of hydroperoxides, alcohols, and acids; and of attacked antioxidant bonds. The authors acquire and talk about over 3000 expense constants of other reactions of peroxyl radicals in oxidation and co-oxidation. They describe a brand new semiempiric idea of reactivity of reactants in effortless oxidative steps and the set of rules of calculation of activation energies, expense constants, and geometrical parameters of the transition states of unfastened radical reactions. After elucidating the chemistry and kinetics of antioxidant motion, the ebook covers oxidative strategies that ensue in organic structures.

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Ciamician, P. Silber H. Staudinger. H. N. Stephens H. N. Stephens. M. Hartman, M. Seiberth, H. Hock, W. Susemihl R. Criegee, H. Hock A. Rieche H. Hock and S. Lang H. Hock and S. Lang H. Hock and S. Lang K. I. Ivanov J. L. Benton and M. M. 2 DEVELOPMENT OF THE CHAIN THEORY OF OXIDATION OF ORGANIC COMPOUNDS The peroxide theory of Bach [20] and Engler [23] fixed the phenomenon of peroxide formation as the primary product of hydrocarbon oxidation by dioxygen. However, the problem of the mechanism of peroxide formation remained unsolved.

R1 R2 R3 CO. þ RH À! R1 R2 R3 COH þ R. © 2005 by Taylor & Francis Group. 3 Alcohol (ROH) O Along with this reaction, the alkoxyl radicals are formed by the recombination of the tertiary peroxyl radical (see Chapter 2). R1 R2 R3 COO. þ R1 R2 R3 COO. À! 2R1 R2 R3 CO. þ O2 Under the catalytic action of acid, tertiary hydroperoxide is hydrolyzed to alcohol and hydrogen peroxide [46,83]. 5). The heat of oxidation depends on the structure of the oxidized group. © 2005 by Taylor & Francis Group. 3 KETONES Ketones are formed in oxidized hydrocarbons by the following ways.

R. Cooper and H. W. Melville C. Bawn and J. Williamson M. S. Kharash, F. S. Arimoto, and W. Nudenberg L. Bateman, H. Hughes, and A. Moris A. A. Miller and F. R. A. R. Mayo [64] F. F. Rust [55] G. A. Russell [68] [58] [65] [66] [67] [54] [54] continued © 2005 by Taylor & Francis Group. 2 Chronological Table of the Main Concepts and Experimental Findings of Chain Theory of Hydrocarbon Oxidation—continued Year 1959 1960 1960–1961 1961 1962 1964 1964 1965 1967 1967 1968 Event Author Chemiluminescence in the liquid-phase hydrocarbon oxidation was discovered.

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Oxidation and antioxidants in organic chemistry and biology by Evgeny T. Denisov, Igor B. Afanas'ev

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