Proton transfer and unimolecular decay in the reaction HCO/sup +/ + CH/sub 3/OH. -->. CH/sub 3/OH/sub 2//sup +/ + CO
Journal Article
·
· J. Phys. Chem.; (United States)
We report a study of the title reaction over the relative energy range from 0.45 to 3.59 eV. The proton-transfer reaction proceeds in a direct, impulsive manner at all energies with 33 to 70% of the available energy appearing in product translation. Dissociation of the protonated methanol product via CH/sub 3//sup +/ formation or elimination of H/sub 2/ to CH/sub 2/OH/sup +/ becomes important at higher collision energies. Measurement of the threshold for CH/sub 3//sup +/ production demonstrates that > 90% of the HCO/sup +/ reagents are in the ground vibrational state. Abnormally small product translational energy release for H/sub 2/ elimination provides evidence that quantum mechanical tunneling through the exit channel barrier determines the dynamics of this process. Isotopic labeling studies, in which the parent ion CH/sub 3/ODH/sup +/ may eliminate H/sub 2/ or HD, show that k/sub H/sub 2///k/sub HD/ = 3.0, confirming the role of tunneling in the elimination step.
- Research Organization:
- Univ. of Rochester, NY
- OSTI ID:
- 6803729
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 86:11; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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Thu Feb 28 23:00:00 EST 1985
· J. Chem. Phys.; (United States)
·
OSTI ID:6093424
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· Journal of Chemical Physics
·
OSTI ID:21255529
Photoionization of CH/sub 3/OH, CD/sub 3/OH, and CH/sub 3/OD: Dissociative ionization mechanisms and ionic structures
Journal Article
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· J. Chem. Phys.; (United States)
·
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ACYL RADICALS
ALCOHOLS
ANGULAR DISTRIBUTION
BEAMS
CATIONS
CHARGED PARTICLES
CHARGED-PARTICLE TRANSPORT
CHEMICAL REACTIONS
COLLIDING BEAMS
DEUTERIUM
DISTRIBUTION
ENERGY LEVELS
EXCITED STATES
FORMYL RADICALS
HYDROGEN IONS
HYDROGEN IONS 3 PLUS
HYDROGEN ISOTOPES
HYDROXY COMPOUNDS
IONS
ISOTOPE APPLICATIONS
ISOTOPES
LIGHT NUCLEI
METHANOL
MOLECULAR IONS
NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
PROTON TRANSPORT
RADIATION TRANSPORT
RADICALS
STABLE ISOTOPES
TRACER TECHNIQUES
TUNNEL EFFECT
VIBRATIONAL STATES
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ACYL RADICALS
ALCOHOLS
ANGULAR DISTRIBUTION
BEAMS
CATIONS
CHARGED PARTICLES
CHARGED-PARTICLE TRANSPORT
CHEMICAL REACTIONS
COLLIDING BEAMS
DEUTERIUM
DISTRIBUTION
ENERGY LEVELS
EXCITED STATES
FORMYL RADICALS
HYDROGEN IONS
HYDROGEN IONS 3 PLUS
HYDROGEN ISOTOPES
HYDROXY COMPOUNDS
IONS
ISOTOPE APPLICATIONS
ISOTOPES
LIGHT NUCLEI
METHANOL
MOLECULAR IONS
NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
PROTON TRANSPORT
RADIATION TRANSPORT
RADICALS
STABLE ISOTOPES
TRACER TECHNIQUES
TUNNEL EFFECT
VIBRATIONAL STATES