on the reactivity was performed by the Koppel–Palm multi-parameter approach. The results indicate that the polarization and electrophilicity of the solvents are responsible for the rates of both reactions. The higher reactivity of methyl phenyl selenide has been ascribed to the higher polarizability and softness of the selenium atom in comparison with the sulphur atom.
在14种非质子传递溶剂中,测量了覆盖广泛介电常数的14种非质子传递溶剂,测定了甲基苯基
硫醚和甲基苯基
硒化物被
硫酸二甲酯甲基化的二级速率常数和活化参数。在各种溶剂中,两种底物均观察到相同的反应顺序。介质对反应性的影响分析是通过Koppel-Palm多参数方法进行的。结果表明,溶剂的极化和亲电性决定了两个反应的速率。与
硫原子相比,甲基苯基
硒化物的较高反应性归因于
硒原子的较高极化率和柔软性。