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研究了水溶性钯-膦配合物PdCl2(TPPTS)2催化1-己烯加氢反应,考察了两相催化体系中添加表面活性剂CTAB,膦配体TPPTS,以及溶液pH值等对反应的影响,证明了1-己烯加氢反应中有一诱导期.反应中涉及两种催化活性物种.一种是由PdCl2(TPPTS)2还原生成的低氧化态催化物种,它在一定的CTAB浓度下,可以保持相当的稳定性.另一种是被TPPTS或H2还原形成的钯黑.根据PdCl2和TPPTS反应过程的31PNMR研究,对PdCl2(TPPTS)2分子中Pd被还原和TPPTS被氧化提出了解释
The water-soluble palladium-phosphine complex PdCl2 (TPPTS) 2 was used to catalyze the hydrogenation of 1-hexene. The effects of surfactant CTAB, phosphine ligand TPPTS and the pH value of the solution on the reaction were investigated. , Proving that there is an induction period in the 1-hexene hydrogenation reaction. The reaction involves two catalytically active species. One is a low oxidation state catalytic species produced by the reduction of PdCl2 (TPPTS) 2, which maintains considerable stability at a certain CTAB concentration. The other is palladium black formed by TPPTS or H2 reduction. According to the 31P NMR study of PdCl 2 and TPPTS reaction processes, Pd Pd (TPPTS) 2 molecules were reduced and TPPTS was oxidized