The reaction of atomic hydrogen with methyl cyanide

1970 ◽  
Vol 48 (23) ◽  
pp. 3619-3622 ◽  
Author(s):  
J. W. S. Jamieson ◽  
G. R. Brown ◽  
J. S. Tanner
Keyword(s):  
Kinetic Parameters ◽  
Electric Discharge ◽  
Hydrogen Cyanide ◽  
Atomic Hydrogen ◽  
Hydrogen Atoms ◽  
Flow Rates ◽  
Methyl Cyanide ◽  
Different Temperatures ◽  
A Minor ◽  
Minor Extent

The reaction of hydrogen atoms, produced by electric discharge, with methyl cyanide vapor has been reinvestigated at seven different temperatures between 40 and 507 °C over a range of methyl cyanide flow rates from 2 to 25 μmoles/s. As in the previous limited investigation the products have been found to be hydrogen cyanide, methane, and ethane, but the present results indicate the presence of chain characteristics to a minor extent, propagated by CN. Kinetic parameters for formation of the products have been evaluated, as kHCN = 3.55 × 10−12 e−5816/RT; [Formula: see text]; and [Formula: see text].

Kinetics of the Reaction of Atomic Hydrogen with Vinyl Chloride

1971 ◽  
Vol 49 (7) ◽  
pp. 1023-1026
Author(s):  
J. S. Tanner ◽  
J. W. S. Jamieson
Keyword(s):  
Hydrogen Chloride ◽  
Vinyl Chloride ◽  
Electric Discharge ◽  
Atomic Hydrogen ◽  
Reaction Rate ◽  
Hydrogen Atoms ◽  
Specific Reaction Rate ◽  
Flow Rates ◽  
Different Temperatures ◽  
Kinetics Of

The reaction of hydrogen atoms, produced by electric discharge, with vinyl chloride vapor has been studied at four widely different temperatures. Since the maximum yields of HCl at both 328 and 494 °C exceeded the flow rates of atomic hydrogen, the reaction was observed to have limited chain characteristics. The products were hydrogen chloride, ethylene, methane, and ethane. The specific reaction rate for HCl production was found to be about [Formula: see text] and that for production of ethylene plus ethane was found to be about [Formula: see text].

Reaction of atomic hydrogen with tetrafluoroethene

1969 ◽  
Vol 47 (10) ◽  
pp. 1696-1698
Author(s):  
Lei Teng ◽  
W. E. Jones
Keyword(s):  
Electric Discharge ◽  
Discharge Tube ◽  
Atomic Hydrogen ◽  
Hydrogen Atoms

Hydrogen atoms, generated in a Wood's electric discharge tube, were allowed to react with tetrafluoroethene. The products of the reaction were found to be HF, C2F3H, C2H2, C2F2H2, C2F4H2, C2FH3, C2H4, and CHF3. The formation of the products with the exception of HF was studied quantitatively from 30–330 °C.

NOTE ON THE PYROLYSIS OF METHYL AND ETHYL CYANIDES

1942 ◽  
Vol 20b (5) ◽  
pp. 69-72 ◽  
Author(s):  
B. S. Rabinovitch ◽  
C. A. Winkler
Keyword(s):  
Hydrogen Cyanide ◽  
Flow Rates ◽  
Methyl Cyanide

The products of pyrolysis of methyl and ethyl cyanides at 865° and 675 °C. respectively have been determined at each of two flow rates. From methyl cyanide were obtained hydrogen, methane, hydrogen cyanide, and carbon. Small amounts of "C2" hydrocarbons and high boiling materials were also formed. The results indicate that hydrogen cyanide is a primary product.Ethyl cyanide yielded hydrogen, methane, ethane, ethylene, hydrogen cyanide, methyl cyanide, acrylonitrile, and carbon, together with small amounts of succinonitrile and higher boiling materials. The reaction is obviously complicated by secondary changes.

THE REACTION OF HYDROGEN ATOMS WITH METHYL CYANIDE

1955 ◽  
Vol 33 (12) ◽  
pp. 1814-1818 ◽  
Author(s):  
W. Forst ◽  
C. A. Winkler
Keyword(s):  
Discharge Tube ◽  
Hydrogen Cyanide ◽  
Main Product ◽  
Initial Step ◽  
Methyl Radicals ◽  
Methyl Radical ◽  
Hydrogen Atoms ◽  
Methyl Cyanide ◽  
Secondary Reactions

Hydrogen atoms produced in a discharge tube were found to react with methyl cyanide to produce hydrogen cyanide as the main product, together with smaller amounts of methane and ethane. The proposed mechanism involves the formation of hydrogen cyanide and a methyl radical in the initial step; methane and ethane are attributed to secondary reactions of the methyl radicals.

THE REACTIONS OF DIMETHYL- AND TRIMETHYL-AMINES WITH ATOMIC HYDROGEN

1958 ◽  
Vol 36 (8) ◽  
pp. 1171-1173 ◽  
Author(s):  
Z. M. George ◽  
A. N. Wright ◽  
C. A. Winkler
Keyword(s):  
Hydrogen Cyanide ◽  
Atomic Hydrogen ◽  
Hydrogen Atoms

The reactions of hydrogen atoms with dimethyl- and trimethyl-amines produced mainly methane, together with relatively large quantities of ethane and small amounts of hydrogen cyanide. Dimethylamine was also a product of the trimethylamine reaction.

THE REACTION OF ACTIVE NITROGEN WITH HYDRAZINE

1955 ◽  
Vol 33 (4) ◽  
pp. 692-698 ◽  
Author(s):  
G. R. Freeman ◽  
C. A. Winkler
Keyword(s):  
Hydrogen Cyanide ◽  
Chemical Reactivity ◽  
Large Contribution ◽  
Ammonia Production ◽  
Hydrogen Atoms ◽  
Active Nitrogen ◽  
Flow Rates ◽  
Production Of Hydrogen ◽  
Secondary Reactions ◽  
Excited Nitrogen

Hydrazine was completely destroyed by active nitrogen, at both 150 °C. and 480 °C., up to a hydrazine flow rate of about 22 × 10−6 mole per sec., whereas ammonia production was small at hydrazine flow rates below about 12 × 10−6 mole per sec. Thus it appears that ammonia is formed in secondary reactions only. The results indicate that NH2 radicals rather than hydrogen atoms may be prominent in secondary reactions. Comparison of the rate of hydrazine destruction with the rate of production of hydrogen cyanide from ethylene indicates that excited nitrogen molecules do not make a large contribution to the chemical reactivity of active nitrogen.

THE REACTIONS OF 2-METHYL ETHYLENIMINE AND AZACYCLOBUTANE WITH ATOMIC HYDROGEN

1965 ◽  
Vol 43 (7) ◽  
pp. 1973-1977 ◽  
Author(s):  
J. W. S. Jamieson ◽  
G. R. Brown ◽  
W. K. Hancock
Keyword(s):  
Atomic Hydrogen ◽  
Major Product ◽  
The Other ◽  
Hydrogen Atoms ◽  
Flow Rates ◽  
Hydrogen Flow

The reactions of hydrogen atoms with 2-methyl ethylenimine and azacyclobutane have been investigated at various temperatures. Between 100 and 300 °C both reactions have been found to be rapid and complete, so that the maximum disappearance of either cyclic imine under these conditions may be regarded as a satisfactory measure of atomic hydrogen flow rates. At 300 °C ethane has been found to be a major product, and it has been inferred from this and other results at this temperature that the other major product of both reactions is cyanogen, which could not be isolated since it appears to form compounds with both cyclic imines.

THE KINETICS OF THE REACTION OF ATOMIC HYDROGEN WITH METHANE

1964 ◽  
Vol 42 (7) ◽  
pp. 1638-1644 ◽  
Author(s):  
J. W. S. Jamieson ◽  
G. R. Brown
Keyword(s):  
Activation Energy ◽  
Electric Discharge ◽  
Atomic Hydrogen ◽  
Flow System ◽  
Steric Factor ◽  
Primary Reaction ◽  
Kcal Mole ◽  
Hydrogen Atoms ◽  
Fast Flow ◽  
Kinetics Of

Reinvestigation of the reaction of hydrogen atoms, produced by electric discharge, with methane in a fast flow system has given an activation energy of 7.4 ± 1.1 kcal/mole and a steric factor of about 10−3 for the primary reaction, H + CH4 → H2 + CH3.

THE REACTION OF ATOMIC HYDROGEN WITH FORMAMIDE VAPOR

1963 ◽  
Vol 41 (6) ◽  
pp. 1568-1574 ◽  
Author(s):  
J. W. S. Jamieson
Keyword(s):  
Thermal Decomposition ◽  
Free Radical ◽  
Reaction Temperature ◽  
Hydrogen Cyanide ◽  
Atomic Hydrogen ◽  
Main Product ◽  
Chain Mechanism ◽  
Hydrogen Atoms ◽  
Radical Chain ◽  
Wide Range

Hydrogen cyanide was the main product of the reaction of hydrogen atoms with formamide vapor; its rate of production was fairly rapid and completely independent of reaction temperature over a wide range. If a hydrogen is abstracted from formamide it must be one of the hydrogens bonded to nitrogen. The results of this investigation suggest the possibility of another free radical chain mechanism, which does not involve hydrogen atoms, for the thermal decomposition of formamide vapor.

H NMR Evidence for a Change in The Local Hydrogen Environment of Sites Associated with the Staebler-Wronski Effect in a-Si:H

2002 ◽  
Vol 715 ◽  
Author(s):  
T. Su ◽  
Robin Plachy ◽  
P. C. Taylor ◽  
S. Stone ◽  
G. Ganguly ◽  
...  
Keyword(s):  
Line Shape ◽  
Defect Density ◽  
Hydrogen Atoms ◽  
Hydrogen Environment ◽  
H Nmr ◽  
Line Shapes ◽  
Different Temperatures ◽  
Staebler Wronski Effect

AbstractWe study the H NMR line shapes of a sample of a-Si:H under several conditions: 1) as grown, 2) light-soaked for 600 hours, and 3) light-soaked followed by annealing at different temperatures. At T = 7 K, the NMR line shape of the sample after light soaking exhibits an additional doublet compared to that of the sample as-grown. This doublet is an indication of a closely separated hydrogen pair. The distance between the two hydrogen atoms is estimated to be about (2.3 ± 0.2) Å. The concentration of these hydrogen sites is estimated to be between 1017 and 1018 cm-3 consistent with ESR measurements of the defect density after light soaking. This doublet disappears after the sample is annealed at 200°C for 4 hours.

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