Homogeneous Hydrogenation of Alkenes Catalyzed by the Ruthenium−Hydride Complex (PCy3)2(CO)(Cl)RuH: Spectroscopic Observation of the Ruthenium−Ethyl and Ruthenium−Ethylene−Hydride Intermediate Species
Homogeneous Hydrogenation of Alkenes Catalyzed by the Ruthenium−Hydride Complex (PCy3)2(CO)(Cl)RuH: Spectroscopic Observation of the Ruthenium−Ethyl and Ruthenium−Ethylene−Hydride Intermediate Species
复制标题
钌-氢化物配合物 (PCy3)2(CO)(Cl)RuH 催化烯烃均相氢化：钌-乙基和钌-乙烯-氢化物中间体的光谱观察
DOI：
10.1021/om990493k
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发表时间：
1999
期刊：
影响因子：
2.8
通讯作者：
D. W. Lee
中科院分区：
文献类型：
--
作者：
Chae S. Yi;D. W. Lee
钌-氢化物配合物（PCy 3）2（CO）（Cl）RuH（1a）被发现可以催化末端和环状烯烃的氢化。例如，1-己烯与4大气压H2在1a（1-己烯：1a = 8300：1）存在下的反应产生氢化产物2（TON = 12 000 h-1）。用过量的乙烯处理1a导致分别观察到钌-乙基和钌-乙烯-氢化物物种4a和5a。从VT NMR数据中估计了1a，4a和5a之间平衡的热力学参数。这些结果与单氢化物机理途径一致。
The ruthenium−hydride complex (PCy3)2(CO)(Cl)RuH (1a) was found to catalyze the hydrogenation of terminal and cyclic alkenes. For example, the reaction of 1-hexene with 4 atm of H2 in the presence of 1a (1-hexene:1a = 8300:1) produced the hydrogenation product 2 (TON = 12 000 h-1). The treatment of 1a with excess ethylene led to the observation of both the ruthenium−ethyl and ruthenium−ethylene−hydride species 4a and 5a, respectively. The thermodynamic parameters for the equilibria among 1a, 4a, and 5a were estimated from the VT NMR data. These results are consistent with a monohydride mechanistic pathway.