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Energetics and reaction mechanisms of SiH/sup +/ + D/sub 2/ and SiD/sup +/ + H/sub 2/ and collision-induced dissociation of SiD/sub 3//sup +/

Journal Article · · J. Phys. Chem.; (United States)
DOI:https://doi.org/10.1021/j100306a051· OSTI ID:5796925
;
The title reactions are investigated by guided ion beam mass spectrometry. Absolute cross sections are determined as a function of the relative collision energy. In the reaction of SiH/sup +/ with D/sub 2/, the lowest energy process is the near thermoneutral H/D exchange reaction. At energies above about 2 eV, several minor processes are observed: deuterium atom transfer to form SiHD/sup +/, H/D/sub 2/ exchange to yield SiD/sub 2//sup +/, and collision-induced dissociation into Si/sup +/ and H. The reaction of SiD/sup +/ + H/sub 2/ is observed to have analogous product channels with nearly identical energy behaviors. The translational energy dependence of the collision-induced dissociation of SiD/sub 3//sup +/ is shown to correlate well with the reaction of SiH/sup +/ (SiD/sup +/) + D/sub 2/ (H/sub 2/). This supports the intermediacy of SiHD/sub 2//sup +/ (SiH/sub 2/D/sup +/) for the H/D isotope exchange reaction. The thermochemistry of all these reactions is in good agreement with previous studies indicates that there are no activation barriers in excess of the endothermicities.
Research Organization:
Univ. of California, Berkeley
OSTI ID:
5796925
Journal Information:
J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 91:22; ISSN JPCHA
Country of Publication:
United States
Language:
English

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400202 -- Isotope Effects
Isotope Exchange
& Isotope Separation
640304 -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
CATIONS
CHARGED PARTICLES
CHEMICAL REACTIONS
COLLISIONS
DATA
DEUTERIUM
DISSOCIATION
ELEMENTS
ENERGY RANGE
EV RANGE
EV RANGE 01-10
EXPERIMENTAL DATA
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
INFORMATION
ION COLLISIONS
ION-MOLECULE COLLISIONS
IONS
ISOTOPE EFFECTS
ISOTOPES
LIGHT NUCLEI
MASS SPECTROSCOPY
MOLECULE COLLISIONS
NONMETALS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
ORGANIC SILICON COMPOUNDS
SILANES
SILICON COMPOUNDS
SPECTROSCOPY
STABLE ISOTOPES