Insertion vs. abstraction in the H + H/sub 2/. -->. H/sub 2/ + H exchange reaction
Journal Article
·
· J. Phys. Chem.; (United States)
At collision energies above 1eV an insertion mechanism is shown to dominate in the hydrogen exchange reaction. The cone of acceptance for reaction is found to be made up of an inner cone (i.e., for more nearly collinear collisions) where exchange proceeds by abstraction and an outer spherical sector where the mechanism is by insertion. The cross section for reaction, computed by classical trajectories, declines at energies above ca. 1 eV due to a recrossing of the transition state after a collision with an inner hard core. Thus, while the barrier to insertion is higher, this mechanism dominates for such hot H atoms as are currently available from photodissociation. For the H + HD reaction with rotationally cold HD, the cone of acceptance about the D atom is significantly wider. 17 references, 4 figures.
- Research Organization:
- Hebrew Univ., Jerusalem, Israel
- OSTI ID:
- 6038643
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 90:6; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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· J. Phys. Chem.; (United States)
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OSTI ID:5760640
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Journal Article
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Mon Mar 06 23:00:00 EST 2006
· Journal of Chemical Physics
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OSTI ID:20783241
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
CHEMICAL REACTIONS
COLLISIONS
CROSS SECTIONS
DATA
DEUTERIDES
DEUTERIUM
DEUTERIUM COMPOUNDS
ELEMENTS
ENERGY
ENERGY RANGE
EV RANGE
EV RANGE 01-10
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN DEUTERIDE
HYDROGEN ISOTOPES
INFORMATION
INTEGRAL CROSS SECTIONS
ISOTOPES
KINETIC ENERGY
LIGHT NUCLEI
MILLI EV RANGE
MOLECULE COLLISIONS
MONTE CARLO METHOD
NONMETALS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
POTENTIAL ENERGY
STABLE ISOTOPES
THEORETICAL DATA
400201* -- Chemical & Physicochemical Properties
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
CHEMICAL REACTIONS
COLLISIONS
CROSS SECTIONS
DATA
DEUTERIDES
DEUTERIUM
DEUTERIUM COMPOUNDS
ELEMENTS
ENERGY
ENERGY RANGE
EV RANGE
EV RANGE 01-10
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN DEUTERIDE
HYDROGEN ISOTOPES
INFORMATION
INTEGRAL CROSS SECTIONS
ISOTOPES
KINETIC ENERGY
LIGHT NUCLEI
MILLI EV RANGE
MOLECULE COLLISIONS
MONTE CARLO METHOD
NONMETALS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
POTENTIAL ENERGY
STABLE ISOTOPES
THEORETICAL DATA