Flash vacuum pyrolysis of (p-chloro ethyl)-pyrazole was studied. Pyrazole elimination and vinyl chloride formation were found. Competitive reactions with (p-chloro ethyl)-pyrazole were carried out using N-ethyl-3,5-dimethyl pyrazole as internal standard to obtain the kinetic parameters (Ea). A(bHf")
Kinetics of gas-phase thermal elimination of (α-phenylethyl) and (β-phenylethyl)-pyrazole
✍ Scribed by Jorge Daniel Perez; Leonardo Miguel Phagouape
- Publisher
- John Wiley and Sons
- Year
- 1989
- Tongue
- English
- Weight
- 252 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0538-8066
No coin nor oath required. For personal study only.
✦ Synopsis
Flash Vacuum Pyrolysis of (a-phenylethyl) and (P-phenylethy1)-pyrazole were studied. Pyrazole and Styrene were found as only products of both reactions. The kinetic parameters obtained reinforce the results previously found about the poor influence of the substitutents on the LY and p carbons of the ethyl group in the FVP of N-alkyl pyrazoles and (p-haloethyl) pyrazoles.
📜 SIMILAR VOLUMES
Pyrazole elimination and vinyl bromide were found as products in the Flash Vacuum Pyrolysis of (p-Bromo ethyl)-pyrazole. To obtain kinetic parameters (E,) we carried out competitive reactions using (p-chloro ethyl)-pyrazole as an internal standard. A thermochemical study to calculate A(AH,? for this
The kinetic study of the gas-phase thermal elimination reactions of N-ethyl-3,5 dimethyl-pyrazole ( I ) , N-ethyl-pyrazole ( I I 1, N-sec-butyl-pyrazole ( I I I 1, and N-tert-butyl-pyrazole (IV) using a flow system is reported. After obtaining activation parameters for I we carried out competitive r
The gas-phase elimination kinetics of primary, secondary and tertiary b-hydroxynitriles were examined in static seasoned vessels over the temperature range 360-450 °C and pressure range 47-167 Torr (1 Torr = 133.3 Pa). These reactions are homogeneous, unimolecular and follow a first-order rate law.
## Abstract Rates of thermal gas‐phase elimination of eleven 2‐aryloxyacetic acid have been measured over a 45°C temperature range for each compound. Hammett correlation of the present kinetic data with the literature σ^0^ values of the given substituents gave a reaction ρ constant of 0.69 at 600 K