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乙基自由基的生成热。△H_f~6(C_2H_5)是动力学和热化学中很重要的基本数据。近年来,对已沿用20多年的乙基自由基生成热的数据有争议。 1966年 Kerr根据乙烷与溴以及碘的卤化反应动力学研究,确定乙基自由基的生成热。△H_f~0(C_2H_5)为26 Kcal mol~(-1)。近20年来普遍采用这一数据。1981年 Castelhau。等使用异辛烷溶液中的自由基缓冲体系的技术,根据甲基自由基生成热△H_f~0(CH_3)=34.4Kcal mol~(-1),相对地测定了乙基自由基生成热为28Kcal mol~(-10。然而 McMillen和 Golden在1982年的
Ethyl radical generation heat. △ H_f ~ 6 (C_2H_5) is a very important basic data in kinetics and thermochemistry. In recent years, data on the heat generation of ethyl radicals that have been used for over 20 years have been controversial. In 1966, Kerr determined the heat of formation of ethyl radicals based on the halogenation kinetics of ethane with bromine and iodine. △ H_f ~ 0 (C_2H_5) is 26 Kcal mol ~ (-1). This data has been widely adopted for nearly 20 years. 1981 Castelhau. Such as the use of isooctane solution in the buffer system of free radical technology, according to the methyl radical generation heat △ H_f ~ 0 (CH_3) = 34.4Kcal mol ~ (-1), relatively measured ethyl radical heat 28Kcal mol ~ (-10. However McMillen and Golden in 1982