The rates of the base-catalysed elimination of a series of γ-(p-substituted-phenylthia)propyl bromides and the corresponding oxygen analogues have been determined in t-butanol containing potassium t-butoxide. Although the oxygen compounds react faster than the sulfur counterparts, the p value obtained for the sulfur compounds is larger than that for the oxygen compounds. This difference in reactivity
已在含
叔丁醇钾的
叔丁醇中测定了碱催化的一系列γ-(对位取代的苯基thia)丙基
溴和相应的氧类似物的消除速率。尽管含氧化合物的反应比
含硫化合物的反应快,但
含硫化合物的p值大于含氧化合物的p值。根据二价氧和
硫原子将电子效应传递到γ-碳原子的能力方面的差异来讨论反应性和p值的这种差异。