Energy Dependence of Methanol Proton Transfer Reaction Rate

1970 ◽  
Vol 52 (5) ◽  
pp. 2780-2781 ◽  
Author(s):  
Robert C. Dunbar
Keyword(s):  
Proton Transfer ◽  
Energy Dependence ◽  
Reaction Rate ◽  
Transfer Reaction ◽  
Proton Transfer Reaction

Energy dependence of ion-molecule reactions. I. Methane

1969 ◽  
Vol 22 (11) ◽  
pp. 2267 ◽  
Author(s):  
NA McAskill
Keyword(s):  
Proton Transfer ◽  
Energy Dependence ◽  
Cross Section ◽  
Mass Spectrometer ◽  
Transfer Reaction ◽  
Proton Transfer Reaction ◽  
Ion Chamber ◽  
Ion Molecule Reactions ◽  
Path Lengths ◽  
Primary Ions

The ion-molecule reactions of gaseous methane were studied at source pressures of up to 70 μ using a mass spectrometer operated without the usual source magnets. The range of ion exit energies used (0.2-1.8 eV) was obtained by using different ion path lengths as well as different field strengths. The operation of the mass spectrometer was checked by measuring the rate for the proton transfer reaction of CH4+. The energy dependence and the rate of the reactions inside the ion chamber of all the primary ions in CH4 were determined by plotting the cross section against the term, (ion exit energy)-1/2.

Proton transfer reaction rate coefficients between H3O+ and some sulphur compounds

2010 ◽  
Vol 295 (1-2) ◽  
pp. 43-48 ◽  
Author(s):  
Luca Cappellin ◽  
Michael Probst ◽  
Jumras Limtrakul ◽  
Franco Biasioli ◽  
Erna Schuhfried ◽  
...  
Keyword(s):  
Proton Transfer ◽  
Reaction Rate ◽  
Transfer Reaction ◽  
Proton Transfer Reaction ◽  
Rate Coefficients ◽  
Sulphur Compounds

Reactions of tert-C4H9+, tert-C5H11+, and CH3-cy-C5H9+ ions with pentenes

1976 ◽  
Vol 54 (19) ◽  
pp. 3050-3055 ◽  
Author(s):  
Guy J. Collin
Keyword(s):  
Proton Transfer ◽  
Rate Constants ◽  
Hydrogen Molecule ◽  
Reaction Rate ◽  
Transfer Reaction ◽  
Proton Transfer Reaction ◽  
Unsaturated Hydrocarbons ◽  
Total Reaction ◽  
Reaction Rate Constants ◽  
Isomerization Mechanism

Total reaction rate constants for the disappearance of tert-C4H9+ ions with five C5H10 unsaturated hydrocarbons were determined by comparing the rate of formation of isobutane in the radiolysis of neopentane in the presence of various additives. These rate constants are of the order of 5 to 1.35 × 10−10 cm3 molecule−1 s−1 depending upon the olefin under investigation. The hydride transfer reaction from 3-methyl-1-butene and trans-2-pentene toward the tert-C4H9+ ion was also observed, as was the proton transfer reaction from the tert-C4H9+ ion toward 2-methyl-2-butene and 2-methyl-1-butene. In the latter two cases, a significant isomerization of methylbutene is noticed: an isomerization mechanism based upon the reactions of tert-C5H11+ ions is tentatively suggested. Finally, the transfer reaction of an hydrogen molecule between the CH3-cy-C5H9+ ion and the methylbutenes is observed during the radiolysis of methylcyclopentane.

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