| Autor: |
Ball, Graham E., Brookes, Christopher M., Cowan, Alexander J., Darwish, Tamim A., George, Michael W., Kawanami, Hajime K., Portius, Peter, Rourke, Jonathan P. |
| Předmět: |
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| Zdroj: |
Proceedings of the National Academy of Sciences of the United States of America; 4/24/2007, Vol. 104 Issue 17, p6927-6932, 6p |
| Abstrakt: |
The organometallic alkane complexes Re(Cp)(CO)(PF3)(alkane) and Re(Cp)(CO)2(alkane) have been detected after the photolysis of Re(Cp)(COh(PF3) in alkane solvent. NMR and time-resolved IR experiments reveal that the species produced by the interaction of n-pentane with [Re(Cp)(CO)(PF3)] are an equilibrium mixture of Re(Cp)(CO)(PF3)(pentane) and Re(Cp)(CO)(PF3)(pentyl)H. The interaction of cyclopentane with [Re(Cp)(CO)(PF3)] most likely results in a similar equilibrium between cyclopentyl hydride and cyclopentane complexes. An increasing proportion of alkane complex is observed on going from n-pentane to cyclopentane to cyclohexane, where only a small amount, if any, of the cyclohexyl hydride form is present. In general, when [Re(Cp)(CO)(PF3)] reacts with alkanes, the products display a higher degree of oxidative cleavage in comparison with [Re(Cp)(CO)2], which favors alkane complexation without activation. Species with the formula Re(Cp)(CO)(PF3)(alkane) have higher thermal stability and lower reactivity toward CO than the analogous Re(Cp)(CO)2(alkane) complexes. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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