Isomerisation of pentenes with H4Ru4(CO)12

✍ Scribed by M. Valle; D. Osella; G.A. Vaglio

• Book ID: 104139216
• Publisher: Elsevier Science
• Year: 1976
• Tongue: English
• Weight: 416 KB
• Volume: 20
• Category: Article
• ISSN: 0020-1693
• DOI: 10.1016/s0020-1693(00)94118-5

✦ Synopsis

Catalytic isomerisation of I-pentene to 2-cis and 2-trans-pentene with H4R~q(CO)1Z in toluene at 70.4 "C is described. Carbon monoxide, hydrogen, weak acids and polar substances, such as ethyl acetate, decrease the isomerisation rate. Reactions of H4Ru4lCO)12 with trans-CzH2D2 and [1,2-D2] Ipentene and of D4R~4(C0)12 with I-pentene suggest the operation of a metal-hydride addition-elimination mechanism involving oalkyl intermediates. The active species is supposed to be mainly originated by loss of CO to give H&u4 (CO), I, Catalytic hydrogenation of the pentenc isomers occurs at the approaching of the equilibrium and is largerly enhanced bv addition of hydrogen to the reaction system.