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Recent Insights on Hydrogen Atom Transfer in the Inhibition of Hydrocarbon Autoxidation
Accounts of Chemical Research ( IF 16.4 ) Pub Date : 2018-07-23 00:00:00 , DOI: 10.1021/acs.accounts.8b00251
Jia-Fei Poon 1 , Derek A. Pratt 1
Affiliation  

Autoxidation, the free radical chain reaction that nominally inserts O2 into hydrocarbons to give peroxides, is primarily responsible for the degradation of all organic materials. Peroxyl radicals propagate autoxidation mainly by abstraction of labile H-atoms from the hydrocarbons, whereas radical-trapping antioxidants (RTAs) inhibit autoxidation by donating an H-atom to the peroxyl radical to give a nonpropagating radical. As such, a detailed understanding of the kinetics and thermodynamics of H-atom transfer (HAT) reactions to peroxyl radicals, and the effects of sterics, electronics, and medium thereupon, is key to understanding the mechanisms and products of autoxidation and the ability of RTAs to inhibit it.

中文翻译:

氢原子转移对碳氢化合物自氧化抑制作用的最新见解

自氧化是自由基链反应,名义上会将O 2插入烃中以产生过氧化物,主要负责所有有机材料的降解。过氧自由基主要通过从烃中提取不稳定的H原子来传播自氧化作用,而自由基捕获抗氧化剂(RTA)通过将H原子提供给过氧自由基以产生非传播性自由基来抑制自氧化作用。因此,对H-原子转移(HAT)对过氧自由基的反应动力学和热力学以及其空间,电子学和介质的影响的详细理解,对于理解自氧化的机理和产物以及氧化能力的关键。使用RTA来抑制它。
更新日期:2018-07-23
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