The pyrolysis of n-propyl nitrate and tert-butyl nitrite at very low pressures (VLPP technique) is reported. For the reaction n-PrON02 A nPrO + NO2 the high-pressure rate expression at 300"K, log k, (sec-l) = 16.5 -40.0 kcal/mole/2.3 RT, is derived. The reaction tert-BuONO -% tert-BuO + N O was stud
Very low-pressure pyrolysis. IV. The decomposition of i-propyl iodide and n-propyl iodide
β Scribed by Keith D. King; David M. Golden; G. Neil Spokes; Sidney W. Benson
- Publisher
- John Wiley and Sons
- Year
- 1971
- Tongue
- English
- Weight
- 584 KB
- Volume
- 3
- Category
- Article
- ISSN
- 0538-8066
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β¦ Synopsis
The decomposition rate constant of i-PrI under conditions of very low-pressure pyrolysis (VLPP) is completely consistent with the well-known high-pressure Arrhenius parameters and the RRK(M) theory. The decomposition of n-PrI under the same conditions proceeds via two pathways, the anti-Markownikoff dehydroiodination and C-I bond scission. The data, analyzed by taking into account the mutual interaction of the two pathways, is completely consistent with the known Arrhenius parameters for the bond scission step and, when combined with a reasonable A-factor, yields an activation energy for HI elimination which is as predicted for these semi-ion pair transition states.
π SIMILAR VOLUMES
The very low-pressure pyrolysis (VLPP) technique has been used to study the pyrolysis of n-propyl cyanide over the temperature range of 1090-1 250Β°K. Decomposition proceeds via two pathways, CZ-Ca bond fission and C3-C4 bond fission, with the former accounting for >goy, of the overall decomposition.
## Abstract The thermal unimolecular decomposition of pentβ1βyne has been investigated over the temperature range of 923β1154 K using the technique of very lowβpressure pyrolysis (VLPP). Under the experimental conditions the reaction proceeds predominantly via a molecular retroβene pathway to yield
The rate constants (kuni) for the first-order disappearance of the title molecules have been determined under VLPP conditions. The kuni are not the rate constants of ultimate interest since they reflect the fact that energy transfer competes with the chemical decomposition. Use of the Rice-Ramsperge