Oxiranes are a class of cyclic ethers formed in abundance during low‐temperature combustion of hydrocarbons and biofuels, either via chain‐propagating steps that occur from unimolecular decomposition of β‐hydroperoxyalkyl radicals (β‐̇QOOH) or from reactions of HOȮ with alkenes. Ethyloxirane is one of four alkyl‐substituted cyclic ether isomers produced as an intermediate from n‐butane oxidation. While rate coefficients for β‐̇QOOH → ethyloxirane + ȮH are reported extensively, subsequent reaction mechanisms of the cyclic ether are not. As a result, chemical kinetics mechanisms commonly adopt simplified chemistry to describe ethyloxirane consumption by convoluting several elementary reactions into a single step, which may introduce mechanism truncation error—uncertainty derived from missing or incomplete chemistry.

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环状醚中间体：乙氧基环氧乙烷的反应机理

环氧乙烷是一类在碳氢化合物和生物燃料的低温燃烧过程中大量形成的环状醚，其通过链扩散步骤产生，这些步骤是由β-氢过氧烷基自由基（β- QOOH）的单分子分解或HO-与烯烃的反应产生的。乙氧基环氧乙烷是由正丁烷氧化制得的四种烷基取代的环状醚异构体之一。β的速率系数̇QOOH→乙基环氧乙烷+ȮH被广泛报道，但环醚的后续反应机理未见报道。结果，化学动力学机制通常采用简化的化学方法，通过将几个基本反应卷积到一个步骤中来描述乙氧基环氧乙烷的消耗，这可能会引入机制截断错误-由于化学缺失或不完全而导致的不确定性。