To a solution of 4-hydroxybenzophenone or 4-
hydroxyacetophenone (1.26 mmol) in dichloromethane
(15 mL), potassium hydrogen sulfate (6.82 mmol), sodium
nitrate (7.32 mmol), and 0.875 g of wet silica 50% p/p was
added. The slurry was was left under constant stirring at
room temperature until the completion of the reaction,
checked by TLC (hexane/ethyl acetate, 8:2v/v). Then the
mixture was filtered through silica, the solid was washed
with dichloromethane and the solvent removed under
reduced pressure. The products were then purified by
recrystallization


上面是上硝基的一个操作步骤，反应中wet silica 50% p/p 到底是什么东西，50% p/p 中的p/p是什么比啊，我只知道w/w（质量比）和v/v（体积比），没听过p/p，哪位大神知道啊？@liuchong630@celan@zhulj 返回小木虫查看更多