摘要
利用原位 31 P NMR、IR技术跟踪了 Ru Cl3/ PPh3催化顺酐加氢过程 ,并考察了酸碱的添加对反应的影响 .根据实验结果 ,提出了在 Ru Cl3/ PPh3催化剂体系作用下 ,顺酐均相加氢生成琥珀酸酐的反应历程 :Ru Cl3/ PPh3在反应体系中生成活性物种 Ru HCl(PPh3) 3,顺酐以 C C 双键与 Ru- H活性物种配位生成配合物 ,此配合物分子内氢转移 ,形成金属烷基化物 ,该化合物再与氢进行氧化加成 ,还原脱出产物琥珀酸酐和 Ru- H活性物种 。
In this paper, \{\}\+\{31\}P NMR and IR were used in situ techniques to characterize RuCl\-3/PPh\-3 catalyst, the effect of acids and bases on the hydrogenation of maleic anhydride to succinic anhydride was also studied. Based on the results, the catalytic cycle on the hydrogenaton of maleic anhydride to succinic anhydride catalysed by RuCl\-3/PPh\-3 has been proposed. (1) The active species RuHCl(PPh\-3)\-3 was formed by \{RuCl\-3/\}PPh\-3 in situ characterization; (2) The carbon carbon double bond of maleic anhydride coordinated with the active species to form coordination compound; (3) The metallic alkyl compound was formed by the hydrogen transfer; (4) The metallic alkyl compound reacted with hydrogen to yield succinic anhydride and to restore the active species RuHCl(PPh\-3)\-3.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2002年第4期253-257,共5页
Journal of Molecular Catalysis(China)
基金
河南省自然科学基金项目 (0 1110 3 0 90 0 )
