The Substituent Effect. X. Solvolysis of 3- and 4-Substituted 1-(1-Naphthylethyl) Chlorides
作者:Yuho Tsuno、Masami Sawada、Takahiro Fujii、Yasuhide Yukawa
DOI:10.1246/bcsj.48.3347
日期:1975.11
Fourteen 5-, 6-, and 7-substituted 1-(1-naphthylethyl) chlorides were prepared and the solvolysis rates were determined in 80% (v/v) aqueous acetone at 45 °C. The effects of −R substituents at respective positions were treated on the basis of the equation, logk⁄k0=ρiσi+ρx+σx+=ρ(Cijσi+qrij+σπ+). The position dependency of the inductive effect was given by Cij(=ρi⁄ρi,4α); C3α=1.37, C4α=1.00, C5α=0.75
制备了 14 种 5-、6- 和 7-取代的 1-(1-萘基乙基) 氯化物,并在 45 °C 下在 80% (v/v) 丙酮水溶液中测定溶剂分解速率。各位置-R取代基的影响按等式处理,logk⁄k0=ρiσi+ρx+σx+=ρ(Cijσi+qrij+σπ+)。感应效应的位置依赖性由 Cij(=ρi⁄ρi,4α) 给出;C3α=1.37、C4α=1.00、C5α=0.75、C6α=0.57、C7α=0.72。Cij 值似乎与杜瓦的简化场函数 1/rij 相关。由比率 ρπ+⁄ρi,4α=qr·ij+ 给出的 Pi 电子效应的位置依赖性与 MO 指数的预测一致,例如 Forsyth 的 Δqij(ArCH2+ 参数。同样的处理也适用于其他三种萘反应性、脱氚、α-萘甲酸的 pKa 和萘基铵离子的 pKa。线性 ρi-ρi 关系在这些反应之间成立,表明感应传输的反应独立方案。qr·ij+ 值在共轭位置随