Concurrent ion–molecule reactions. III. Reactions in mixtures of HCl and HCN with D2 and CD4

1967 ◽  
Vol 45 (12) ◽  
pp. 1321-1327 ◽  
Author(s):  
A. G. Harrison ◽  
J. C. J. Thynne
Keyword(s):  
Field Strength ◽  
Cross Sections ◽  
Rate Constants ◽  
The Self ◽  
Ion Molecule Reactions ◽  
Ion Energies

The concurrent ion–molecule reactions in mixtures of HCl and HCN with D2 and CD4 have been studied by the ratio plot method. The following reactions have been detected in mixtures with HCN and their cross sections determined at 10.5 V cm−1 repeller field strength. [Formula: see text]In mixtures of D2 and CD4 with HCl the following reactions have been detected and cross sections determined. [Formula: see text]Rate constants for the self-reactions in HCN and HCl have been measured both at 10.5 V cm1 repeller field and at thermal ion energies.

CONCURRENT ION–MOLECULE REACTIONS IN ETHYLENE AND PROPYLENE

1963 ◽  
Vol 41 (2) ◽  
pp. 236-242 ◽  
Author(s):  
A. G. Harrison
Keyword(s):  
Field Strength ◽  
Mass Spectrometer ◽  
Cross Sections ◽  
High Pressures ◽  
Ion Source ◽  
Molecule Reaction ◽  
Ion Molecule Reactions ◽  
Secondary Ions ◽  
The Cross

The ion–molecule reactions occurring in ethylene and in propylene at high pressures in the mass spectrometer ion source have been studied. It has been shown that two of the six secondary ions in ethylene and four of the nine secondary ions studied in propylene are products of more than one ion–molecule reaction. The cross sections for the separate reactions at 10 v/cm field strength are reported.

ION–MOLECULE REACTIONS IN METHYL ALCOHOL AND METHYL-d3 ALCOHOL

1966 ◽  
Vol 44 (14) ◽  
pp. 1655-1661 ◽  
Author(s):  
J. C. J. Thynne ◽  
F. K. Amenu-Kpodo ◽  
A. G. Harrison
Keyword(s):  
Methyl Alcohol ◽  
Rate Constants ◽  
Hydrogen Transfer ◽  
Rate Coefficients ◽  
Collision Complex ◽  
Ion Molecule Reactions ◽  
Ion Energies ◽  
Hydroxyl Hydrogen

The rate constants for the hydrogen-transfer ion-molecule reactions[Formula: see text]have been measured at thermal ion energies and found to be 12 × 10−10 cm3 molecule−1 s−1 and 8.0 × 10−10 cm3 molecule−1 s−1 respectively. The rate coefficients at higher ion energies (3.7 eV ion exit energy) show little change from these values. Reactions [a] and [b] have also been studied using CD3OH and it is found that in reaction [a] the hydroxyl hydrogen is transferred 2.5 times more readily at low ion energies and 1.8 times more readily at high ion energies than a methyl hydrogen. This rather small specificity would appear to preclude formation of a "locked-in" collision complex even at low ion energies.

REACTIONS OF THERMAL ENERGY IONS: II. RATES OF SOME HYDROGEN TRANSFER ION–MOLECULE REACTIONS

1966 ◽  
Vol 44 (12) ◽  
pp. 1351-1359 ◽  
Author(s):  
A. G. Harrison ◽  
A. Ivko ◽  
T. W. Shannon
Keyword(s):  
Field Strength ◽  
Rate Constant ◽  
Thermal Energy ◽  
Rate Constants ◽  
Hydrogen Transfer ◽  
Thermal Reaction ◽  
Dipole Model ◽  
Protonated Molecule ◽  
Ion Molecule Reactions ◽  
Induced Dipole

The rate constants for the ion–molecule reactions forming the protonated molecule in CH3CN, H2, CH4, and CH3OCH3, the equivalent reactions in the deuteriated species, and the reactions forming COD+ in CO–CD4 mixtures have been measured at thermal energies and at 10.5 V/cm repeller field strength. For H2, HD, D2 and the reactions in CO–CD4 mixtures the rate constant for the thermal reaction is approximately 0.3–0.5 that of the 10.5 V/cm rate constant. For all other cases the ratio of rate constants is approximately unity as predicted by the ion-induced dipole model. The absolute values of the rate constants in most cases are considerably lower than predicted by theory.

Ion–molecule reactions in carbonyl sulfide – hydrocarbon mixtures

1970 ◽  
Vol 48 (4) ◽  
pp. 664-673 ◽  
Author(s):  
I. Džidić ◽  
A. Good ◽  
P. Kebarle
Keyword(s):  
Mass Spectrometer ◽  
Cross Sections ◽  
Rate Constants ◽  
Carbonyl Sulfide ◽  
Independent Set ◽  
Graphical Analysis ◽  
Ion Molecule Reactions ◽  
Product Ions ◽  
The Individual ◽  
Approximate Rate

The major ion–molecule reactions occurring in pure COS and in mixtures of COS with methane, methyl iodide, ethane, and ethylene were investigated in a Nier-type mass spectrometer. In cases where two or more reactions could be postulated to account for the observed product ions, appearance potential data and graphical analysis were used to evaluate the contributions of the individual reactions. Phenomenological cross sections were obtained for the reactions studied and approximate rate constants were then calculated.An independent set of measurements were carried out in a high-pressure pulsed-beam mass spectrometer, in which the absolute rate constants for reactions occurring in COS were measured, using nitrogen as a carrier gas. The rate constants thus obtained were used to verify the validity of the rate constants calculated from the measured cross sections.

State selected ion–molecule reactions by a TESICO technique. IX. Vibrational state dependence of the cross sections in the reaction C2H+2(ν2)+D2(H2)

1984 ◽  
Vol 81 (12) ◽  
pp. 5666-5671 ◽  
Author(s):  
K. Honma ◽  
Tatsuhisa Kato ◽  
Kenichiro Tanaka ◽  
Inosuke Koyano
Keyword(s):  
Cross Sections ◽  
Vibrational State ◽  
State Dependence ◽  
Ion Molecule Reactions ◽  
The Cross

Quantum mechanical integral cross sections and rate constants for the F+HD reactions

2000 ◽  
Vol 112 (22) ◽  
pp. 9802-9809 ◽  
Author(s):  
Dong H. Zhang ◽  
Soo-Y. Lee ◽  
Michael Baer
Keyword(s):  
Cross Sections ◽  
Rate Constants ◽  
Quantum Mechanical

An ICR mass spectrometry study of ion/molecule reactions between ethyl chloride and alkylamines

1991 ◽  
Vol 69 (2) ◽  
pp. 363-367
Author(s):  
Guoying Xu ◽  
Jan A. Herman
Keyword(s):  
Mass Spectrometry ◽  
Key Words ◽  
Rate Constant ◽  
Rate Constants ◽  
Ethyl Chloride ◽  
Ion Molecule Reactions ◽  
Mass Spectrometry Study ◽  
Ethyl Cation

Ion/molecule reactions in mixtures of ethyl chloride with C1–C4 alkylamines were studied by ICR mass spectrometry. Ethyl cation transfer to C1–C4 alkylamines proceeds mainly through diethylchloronium ions with rate constants ~3 × 10−10cm3 s−1. In the case of s-butylamine the corresponding rate constant is 0.5 × 10−10 cm3 s−1. Key words: ICR mass spectrometry, ion/molecule reactions, ethylchloride, methylamine, ethylamine, propylamines, butylamines

Further investigations of charge exchange and electron detachment - I. Ion energies 3 to 40 keV - II. Ion energies 100 to 4000 eV

1955 ◽  
Vol 227 (1171) ◽  
pp. 466-486 ◽  
Keyword(s):  
Charge Transfer ◽  
Energy Range ◽  
Cross Sections ◽  
Atomic Hydrogen ◽  
Molecular Hydrogen ◽  
Hydrogen Ions ◽  
Electron Detachment ◽  
Rare Gases ◽  
Helium Ions ◽  
Ion Energies

This paper describes the measurement of charge transfer cross-sections for protons, molecular hydrogen ions and helium ions in the rare gases and hydrogen, and electron detachment cross-sections for negative atomic hydrogen ions in the rare gases. Part I describes the energy range 3 to 40 keV. In part II the energy range 100 to 4000 eV is described, and the results are discussed in terms of the pseudo-adiabatic hypothesis. Comparisons are made with other experimental results, and anomalous molecular cases are discussed in terms of reactions involving anti-bonding states.

Rate Constants and Cross Sections

1972 ◽  
pp. 101-259 ◽  
Author(s):  
Michael Henchman
Keyword(s):  
Cross Sections ◽  
Rate Constants
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