Thermally Initiated Free-Radical Chain Addition of Alkanes to Alkynes, II. Kinetics of the Addition of Cyclohexane to Phenylethyne under Supercritical Fluid Conditions
✍ Scribed by Metzger, Jürgen O. ;Bangert, Fritz
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1994
- Tongue
- English
- Weight
- 253 KB
- Volume
- 127
- Category
- Article
- ISSN
- 0009-2940
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✦ Synopsis
The kinetics of the addition of cyclohexane (2) to phenylethyne ( 1 ) proceeding via 2-cyclohexyl-1-phenylethenyl radical(3) to give 1-cyclohexyl-2-phenylethene (4) was investigated in the temperature range from 260 to 340°C. The radical chain is initiated by a bimolecular reaction of cyclohe-xane with phenylethyne to give a cyclohexyl radical and a 1-phenylethenyl radical. The physical state of the reaction mixture was varied from liquid to supercritical and to gasphase conditions. No effect on the reaction rate constant near the critical point was observed.
Alkanes can be added to alkenes in a thermally initiated free radical chain reaction (ane reaction)[*.']. The radical chain is initiated by a molecule-induced homolysis of alkane and alkene to give two alkyl radicals [4].