Notes - Kinetics of the Thermal Isomerization of 2-tert-Butyl-3-Phenyloxazirane
Notes - Kinetics of the Thermal Isomerization of 2-tert-Butyl-3-Phenyloxazirane
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DOI：
10.1021/jo01361a610
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发表时间：
1957-10
影响因子：
3.6
通讯作者：
M. Hawthorne;R. Strahm
中科院分区：
文献类型：
--
作者：
M. Hawthorne;R. Strahm
温度倒数与对数K_i的关系图显示出一条很好的直线，该直线的大小为28千卡。每摩尔60到100之间。活化熵为-3±1个熵单位，表明杂氮杂环己烷反应物和硝酮产物的结构都是刚性的。轻微的负值可能表明，由于发展了一个强的N-？O偶极子，过渡态的溶剂化程度增加。
A plot of reciprocal temperature versus log ki produced a good straight line from which was found to be 28 kcal. per mole between 60 and 100. The entropy of activation, ASÍ was found to be—3±1 entropy units, a value which indicates that the structures of oxazirane reactant and ni-trone product are equally rigid. The slight negative value may indicate increased solvation of the transition state due to the development of a strong N-» O dipole.