| 硫酸铁水合物催化乙酸与取代甲醇酯化反应的极性效应和空间效应的分离 |
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| 引用本文： | 张景文,徐之雒,黄化民.硫酸铁水合物催化乙酸与取代甲醇酯化反应的极性效应和空间效应的分离[J].吉林大学学报(理学版),1988(1). |
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| 作者姓名： | 张景文 徐之雒 黄化民 |
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| 作者单位： | 吉林大学化学系有机化学教研室
(张景文，徐之雒)，吉林大学化学系有机化学教研室(黄化民) |
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| 摘 要： | 在以往工作的基础上,研究了乙酸与取代甲醇酯化反应中的极性效应和空间效应的分离问题。利用Ingold—Taft方程,得到了比较精确的相对数值。其空间效应敏感度为0.35;极性效应敏感度为6.85。得到的线性自由能方程为:lg(k_R/k_O)=6.85σ~*+0.35E_s+(-O.048)。根据这一方程,计算出n-C_6H_(12)取代基空间常数为-0.63,从而补充了该取代基文献数据。
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| 关 键 词： | 极性效应 空间效应 空间取代基常数 酯化反应 |
Polar and Steric Effects of the Esterification of Acetic Acid with Substituted Methyl Alcohols under the Catalysis of Ferric Sulfate Hydrate |
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| Zhang Jingwen,Xu Zhiluo and Huang Huamin.Polar and Steric Effects of the Esterification of Acetic Acid with Substituted Methyl Alcohols under the Catalysis of Ferric Sulfate Hydrate[J].Journal of Jilin University: Sci Ed,1988(1). |
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| Authors: | Zhang Jingwen Xu Zhiluo and Huang Huamin |
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| Abstract: | The rate constants of esterifications of 8 species of the substituted methyl alcohols with acetic acid under the catalysis of ferric sulfate hydrate were determined. The line free energy equation has been obtained and the sensitivity of polar and steric effects can be represented as:lgk_R/k_0 = 6.85+0.35Es+(-0.048).The spacial substituent constant of n-C_6H_(13) group obtained from the equation is - 0.63. |
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| Keywords: | polar effect steric effect spacial substant constant esterification |
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