Photodecomposition of iodopentanes in air: Product distributions from the self-reactions of<i>n</i>-pentyl peroxyl radicals
作者:Gerald Heimann、Heinz-Jürgen Benkelberg、Olaf Böge、Peter Warneck
DOI:10.1002/kin.10031
日期:2002.2
pentan-1-oxyl and pentan-2-oxyl radicals, but their nature could not be identified. Minor products were alcohols and carbonyl compounds arising from the decomposition of pentoxyl radicals. Diols and mixed hydroxycarbonyl compounds from cross-combination reactions were essentially absent, in contrast to expectation. The observed product distributions were evaluated to derive branching ratios for the radical-preserving
三种碘戊烷异构体的 254 nm 光氧化产物分布被探索为研究单个过氧化戊基自由基(在环境温度和压力下的空气中)的自反应的技术。正如预期的那样,戊醇和相关的羰基化合物(戊醛或戊酮)是主要产品。其他主要产物是由戊-1-氧基和戊-2-氧基异构化产生的,但其性质无法确定。次要产物是由戊氧基自由基分解产生的醇和羰基化合物。与预期相反,来自交叉组合反应的二醇和混合羟基羰基化合物基本上不存在。评估观察到的产物分布以得出自反应的自由基保留途径的支化比,0.42 ±0.17, 0。46 ± 0.10, 0.39 ± 0.08,对于戊-1-基过氧、戊-2-基过氧和戊-3-基过氧分别。对应戊氧基自由基分解的速率系数,相对于它们与氧的反应,分别为 (5.1 ± 0.5) × 1018、(1.0 ± 0.2) × 1018 和 (3.2 ± 0.3) × 1018 分子 cm-3 . 戊-1-氧基和戊-2-氧基异构