测定了四种2,4-二硝基卤代苯在99.5％乙醇中和硫氰化钾的反应动力学。它们都是二级反应,反应速度的顺序为 Br->I->Cl->F。这和两步历程的推论相符合。2,4-二硝基氟苯的硫氰代反应伴有强烈的醇解副反应,而其它卤代物和2,4-二硝基硫氰代苯在所用的反应条件下几乎不起醇解反应。 The reaction kinetics of four 2,4-dinitrobenzene halides in 99.5% ethanol and potassium thiocyanate were determined. They are secondary reactions, the order of the reaction rate Br-> I-> Cl-> F. This is consistent with the two-step corollary. The thiocyanate reaction of 2,4-dinitrofluorobenzene is accompanied by a strong alcoholysis side reaction while the other halides and 2,4-dinitrothiocyanatobenzene are hardly capable of being alcohol-hydrolyzed under the reaction conditions used reaction.