Hydrogen and deuterium atom abstraction from methanol and trideuteromethanol. Reaction of methoxy radicals with methane
作者:R. Shaw、J. C. J. Thynne
DOI:10.1039/tf9666200104
日期:——
The reactions of trideuteromethyl radicals with methanol and trideuteromethanol have been studied in order to determine the position and rate of hydrogen and deuterium atom abstraction. Over the temperature range studied (130–250°C) the rate of abstraction from the methyl and hydroxyl groups is similar. Substitution of deuterium for hydrogen alters the positional reactivity by an amount in agreement with zero-point energy difference.
Rate constants at 182°C and Arrhenius parameters (based on a value of 1013.34mole–1cm3sec–1 for the recombination rate constant of methyl radicals) have been measured for the reactions:[graphic omitted] and have been calculated for [graphic omitted]Units k and A mole–1 cm3 sec–1, E kcal mole–1.
三氘甲基自由基与甲醇和三氘甲醇的反应已被研究,以确定氢和氘原子抽取的位置和速率。在研究的温度范围内(130–250°C),从甲基和羟基的抽取速率相似。氘代氢的替代改变了位置反应性,数值与零点能差一致。在182°C下测量了反应的速率常数和阿伦尼乌斯参数(基于甲基自由基的重组速率常数1013.34 mole–1 cm3 sec–1),并计算了相关反应的速率常数和阿伦尼乌斯参数。单位为k和A mole–1 cm3 sec–1,E kcal mole–1。