The Elimination Reactions of Some Alkyl Cyanides in the Gas Phase

1973 ◽  
Vol 51 (3) ◽  
pp. 366-369 ◽  
Author(s):  
P. N. Dastoor ◽  
E. U. Emovon
Keyword(s):  
Thermal Decomposition ◽  
Gas Phase ◽  
Rate Constants ◽  
Flow System ◽  
Elimination Reactions ◽  
Kinetics Of

The kinetics of the thermal decomposition of ethyl, isopropyl, and t-butyl cyanides into HCN and the corresponding defines have been studied in a seasoned silica vessel in a flow system in the absence and presence of toluene as inhibitor. The reactions are homogeneous and the unimolecular rate constants are expressible by the following Arrhenius equations:[Formula: see text]

Molecular rearrangements in homogeneous gas-phase elimination reactions. Pyrolysis kinetics of alkyl methanesulphonates

1993 ◽  
Vol 6 (2) ◽  
pp. 85-94 ◽  
Author(s):  
Gabriel Chuchani ◽  
Ignacio Martin ◽  
Rosa M. Dominguez ◽  
Alexandra Rotinov ◽  
Sara Pekerarm ◽  
...  
Keyword(s):  
Gas Phase ◽  
Pyrolysis Kinetics ◽  
Molecular Rearrangements ◽  
Elimination Reactions ◽  
Kinetics Of ◽  
Phase Elimination

Gas-phase kinetics of elimination reactions of pentane-2,4-dione derivatives

1995 ◽  
Vol 27 (5) ◽  
pp. 517-523 ◽  
Author(s):  
Nouria A. Al-Awadi ◽  
Mohamed H. El-Nagdi ◽  
Tommy Mathew
Keyword(s):  
Gas Phase ◽  
Gas Phase Kinetics ◽  
Elimination Reactions ◽  
Kinetics Of

Kinetics of the homogeneous, unimolecular elimination reactions of ethyl oxamate, ethylN,N-dimethyloxamate and ethyl oxanilate in the gas phase

2005 ◽  
Vol 18 (6) ◽  
pp. 539-545 ◽  
Author(s):  
Esker V. Chacin ◽  
María Tosta ◽  
Armando Herize ◽  
Rosa M. Domínguez ◽  
Ysaias Alvarado ◽  
...  
Keyword(s):  
Gas Phase ◽  
Elimination Reactions ◽  
Kinetics Of

THE KINETICS OF THE THERMAL DECOMPOSITION OF VINYL ISOPROPYL ETHER

1953 ◽  
Vol 31 (4) ◽  
pp. 418-421 ◽  
Author(s):  
Arthur T. Blades
Keyword(s):  
Activation Energy ◽  
Thermal Decomposition ◽  
Free Radical ◽  
Ethyl Ether ◽  
Close Agreement ◽  
Flow System ◽  
Isopropyl Ether ◽  
Radical Decomposition ◽  
A Minor ◽  
Kinetics Of

The thermal decomposition of vinyl isopropyl ether in the presence of toluene has been studied in a flow system in the temperature range 447–521 °C. In this range, the data indicate a purely intramolecular decomposition into propylene and acetaldehyde, the activation energy for the reaction being in close agreement with that found for the decomposition of vinyl ethyl ether. At 570 °C. a minor free radical decomposition of the ether becomes apparent. Some qualitative studies of the decomposition of vinyl isobutyl ether are also reported.

scholarly journals Pyrolysis of azetidinones. Part 2. Kinetics and mechanism of thermolysis of β-lactams and β-thiolactams

2016 ◽  
Vol 94 (9) ◽  
pp. 788-793 ◽  
Author(s):  
Nouf S. Al-Hamdan ◽  
Alya M. Al-Etaibi ◽  
Rasha F. Al-Bashir ◽  
Yahia A. Ibrahim ◽  
Nouria A. Al-Awadi ◽  
...  
Keyword(s):  
Gas Phase ◽  
Rate Constants ◽  
Kinetics And Mechanism ◽  
Energy Of Activation ◽  
The Novel ◽  
Temperature Range ◽  
Entropy Of Activation ◽  
Kinetics Of ◽  
Thermolysis Reaction

The kinetics of the gas-phase thermolysis reaction of seven β-lactams and their thione analogues were investigated over the temperature range 533–603 K for the β-lactams and 463–542 K for the β-thiolactams. The average values of the energy of activation (Ea) (kJ mol−1) and Arrhenius log A (s–1) were, respectively, 170.8 ± 18.6 and 12.4 ± 1.6 for the lactams and 131.7 ± 18.2 and 11.0 ± 2.0 for the thione analogues. The entropy of activation (ΔS#) was negative for of the substrates and slightly positive for three. The rate constants (k) (s−1) were calculated for 510 K and compared for the two series of azetidinones. The effects of substituents on rates and the novel role played by the C=O and C=S moieties on the relative reactivities of the cyclic amides are rationalized on the basis of a formal retro[2+2]cycloaddition mechanism used earlier to explain the products of the gas-phase thermolysis reaction of the present azetidinones.

Si+ and SiO+ reactions of atmospheric importance

1969 ◽  
Vol 47 (10) ◽  
pp. 1808-1809 ◽  
Author(s):  
F. C. Fehsenfeld
Keyword(s):  
Gas Phase ◽  
Rate Constants ◽  
Flow System ◽  
Gas Phase Reactions ◽  
Approximate Rate

Flow system measurements are reported of the approximate rate constants for the gas phase reactions Si+ + O2 → SiO+ + O, SiO+ + N → Si+ + NO or NO+ + Si, and SiO+ + O → Si+ + O2. The constants are, respectively, <10−11, ∼1.5 × 10−10, ∼1.5 × 10−10, and 2 × 10−10, all in cm3 s−1.

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