| Autor: |
Aver’yanov, V., Sevost’yanova, N., Batashev, S., Nesolenaya, S. |
| Zdroj: |
Petroleum Chemistry; Dec2006, Vol. 46 Issue 6, p405-414, 10p |
| Abstrakt: |
Kinetic relations for cyclohexene hydrocarbalkoxylation with cyclohexanol in the presence of the Pd(PPh3)2Cl2-PPh3- p-toluenesulfonic acid (TSA) catalyst system were revealed. It was shown that the reaction is first-order in cyclohexene and fractional-order in Pd(PPh3)2Cl2 and that the dependences of the reaction rate on p CO and C6H11OH and PPh3 concentrations are nonmonotonic, passing through maxima at p CO = 3 MPa, [C6H11OH] = 0.15 mol/l, and [PPh3] = 8 × 10−3 mol/l. The plot of the reaction rate versus the TSA concentration is S-shaped in character. The results were interpreted in terms of the mechanism that suggests the formation of cationic hydride complexes as intermediates. A rate equation fitting the experimental data was obtained on the basis of the concept of quasi-equilibrium states for this reaction. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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