【摘要】 <正> 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-C₆H₁₂取代基空间常数为-0.63,从而补充了该取代基文献数据。更多还原

【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/k₀ = 6.85+0.35Es+（-0.048）.The spacial substituent constant of n-C₆H₁₃ group obtained from the equation is - 0.63.更多还原