The reaction of methylene radicals with methyl isocyanide

1979 ◽  
Vol 57 (10) ◽  
pp. 1229-1232 ◽  
Author(s):  
Marsha T. J. Glionna ◽  
Huw O. Pritchard
Keyword(s):  
Gas Phase ◽  
Exploratory Study ◽  
Total Pressure ◽  
Reaction Pathway ◽  
Gas Phase Reactions ◽  
Vibrationally Excited ◽  
Methyl Cyanide ◽  
Isotopic Studies ◽  
Methyl Isocyanide ◽  
Approximate Rate

An exploratory study has been made of the gas-phase reactions of methylene radicals, generated by the photolysis of ketene near 3000 Å, with methyl, ethyl, and allyl isocyanides at room temperature.With methyl isocyanide, the principal product at low pressure is ethyl cyanide, together with a few percent of methyl cyanide; ethyl isocyanide is also formed, increasingly so as the total pressure is increased. Reaction appears to take place through a vibrationally excited ethyl isocyanide intermediate, and approximate rate constants for each reaction pathway are derived. Isotopic studies suggest that the methylene radicals insert in the H3C—NC bond of the methyl isocyanide.

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.

Isomerization of methyl isocyanide sensitized by vibrationally excited ethane

1969 ◽  
Vol 47 (4) ◽  
pp. 669-671
Author(s):  
D. H. Shaw ◽  
B. K. Dunning ◽  
H. O. Pritchard
Keyword(s):  
Free Radical ◽  
Total Pressure ◽  
The Other ◽  
Direct Transfer ◽  
Displacement Reaction ◽  
Methyl Radicals ◽  
Vibrationally Excited ◽  
Methyl Isocyanide

The isomerization of methyl isocyanide in the presence of methyl radicals takes place by two mechanisms. One is the simple free-radical displacement reaction which has been described previously. The other is through a direct transfer of energy from vibrationally excited ethane molecules. The vibrationally sensitized component can be quenched by increasing the total pressure.

Coupled Catalytic/Gas Phase Ignition of Propane-Oxygen-Inert Mixtures on an Isothermally Heated Platinum Filament Supported on Quartz Bar

2018 ◽  
Vol 69 (4) ◽  
pp. 870-874
Author(s):  
Maria Mitu ◽  
Domnina Razus ◽  
Dumitru Oancea
Keyword(s):  
Heat Release ◽  
Gas Phase ◽  
Total Pressure ◽  
Kinetic Equations ◽  
Solid Surfaces ◽  
Excess Oxygen ◽  
Gas Phase Reactions ◽  
Complete Combustion ◽  
Induction Periods ◽  
Catalytically Active

The ignition of gaseous flammable mixtures on catalytically active hot solid surfaces is an intricate process implying the tight interaction between surface and gas phase reactions. The paper presents the results obtained from the study of coupled catalytic-gas phase ignition of propane-oxygen-inert mixtures on an isothermally heated platinum filament stabilized on a thin quartz bar, measuring the induction periods, ti, rates of heat release, (dQr/dt)t and minimum ignition energies, Qmin. The experiments were conducted at different initial pressures between 73 and 101 kPa and filament temperatures between 1080 and 1184 K for 2.68% propane-air mixture and 4.02% propane-air mixture diluted with Ar or N2 in ratio 2:1. For any total pressure, the fuel concentration is the same in each mixture, the complementary composition containing the necessary oxygen for complete combustion and inerts or/and excess oxygen. The measured properties were rationalized using Arrhenius-type kinetic equations.

The flash photolysis of phosphine

1961 ◽  
Vol 262 (1308) ◽  
pp. 1-9 ◽  
Keyword(s):  
Excited State ◽  
Gas Phase ◽  
Total Pressure ◽  
Room Temperature ◽  
Flash Photolysis ◽  
Small Particles ◽  
Vibrationally Excited ◽  
Secondary Reactions

The equation representing the decomposition of phosphine by flash photolysis is shown to be PH 3 → P red + 3/2H 2 . The phosphorus is produced in the form of small particles which remain suspended in the gas phase for several minutes provided that the total pressure is high enough. The variation with time of the spectra of PH 2 , PH and P 2 has been studied and the secondary reactions consequent upon the photolysis are shown to be homogeneous. The P 2 is produced in a vibrationally excited state at room temperature, transitions involving levels of up to v' = 7 being observed. A mechanism for the photolysis and the production of excited P 2 is proposed.

Gas-Phase Reactions

1981 ◽  
Author(s):  
Victor N. Kondratiev ◽  
Evgeniĭ E. Nikitin
Keyword(s):  
Gas Phase ◽  
Gas Phase Reactions

Influence of Gas Mixing and Heating on Gas-Phase Reactions in GaN MOCVD Growth

2012 ◽  
Vol 1 (1) ◽  
pp. P46-P53 ◽  
Author(s):  
Ran Zuo ◽  
Haiqun Yu ◽  
Nan Xu ◽  
Xiaokun He
Keyword(s):  
Gas Phase ◽  
Gas Mixing ◽  
Gas Phase Reactions ◽  
Mocvd Growth

Gas Phase Reactions Activated by Nuclear Processes

1957 ◽  
Vol 79 (17) ◽  
pp. 4609-4616 ◽  
Author(s):  
Adon A. Gordus ◽  
John E. Willard
Keyword(s):  
Gas Phase ◽  
Gas Phase Reactions ◽  
Nuclear Processes
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