The intrazeolite and solution photooxygenations of a series of sulfides have been compared. The unusual zeolite environment enhances the rates of reaction, it suppresses the Pummerer rearrangements, and it has a dramatic effect on the sulfoxide/sulfone ratio. A detailed kinetic study utilizing trapping experiments and intramolecular competition provides evidence for cation complexation to a persulfoxide
比较了一系列
硫化物的
沸石内和溶液光氧化。异常的
沸石环境提高了反应速率,抑制了Pummerer重排,并对亚砜/砜比例产生了巨大影响。利用捕集实验和分子内竞争进行的详细动力学研究为阳离子与过亚砜中间体的络合提供了证据,而后者是独特的
沸石内行为的潜在现象。例如,提高的反应速率可追溯到过亚砜的阳离子稳定化,从而导致对底物和三重态氧的无用分解。