A process for the preparation of an aromatic phosphonous dihalide which comprises reacting an aromatic compound with a phosphorus trihalide in the presence of a superacid, said superacid being an acid having an Hammett acidity function, Ho, which is more negative than -12. The aromatic phosphonous dihalides are useful as precursors for the preparation of phosphonites and phosphinites useful as catalysts for the dimerisation of acrylonitrile.
一种制备芳香族二卤化膦的工艺,包括在超酸存在下,使芳香族化合物与三卤化膦反应,所述超酸是一种哈密特酸度函数 Ho 负于-12 的酸。芳香族二卤化膦可用作制备
亚磷酸盐和
亚膦酸盐的前体,也可用作
丙烯腈二聚反应的催化剂。