Effects of hydration on reactions of O sup minus (H sub 2 O) sub n (n = 0-2). 2. Reactions with H sub 2 and D sub 2
- Air Force Geophysics Lab., Hanscom AFB, MA (United States)
The rate constants for the reactions of O{sup {minus}}(H{sub 2}O){sub n} (n = 0-2) with H{sub 2} and D{sub 2} have been measured as a function of temperature. In addition, the dependences of the rate constants on average center-of-mass kinetic energy ({l angle}KE{sub cm}{r angle}) and the branching ratios for n = 0 have been measured at several temperatures. For n = 0, the reactions with H{sub 2} and D{sub 2} are 48% and 50% efficient, respectively, and depend only weakly on temperature and {l angle}KE{sub cm}{r angle}. Both associative detachment and a channel that produces OH{sup {minus}} are observed. The minor (< 15%) OH{sup {minus}} channel becomes more important at higher temperatures and {l angle}KE{sub cm}{r angle}. One H{sub 2}O ligand reduces the rate constants on the order of a factor of 50. The reaction pathways for n = 1 are approximately 90% associative detachment and 10% production of OH{sup {minus}}(H{sub 2}O). The rate constants for n = 1 are found to increase with increasing temperature. The second H{sub 2}O ligand reduces the rates to below the author's detectable limit. No dependence on rotational energy was found in either the rate constant or the branching ratio for n = 0.
- OSTI ID:
- 5953930
- Journal Information:
- Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 95:9; ISSN JPCHA; ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
400202 -- Isotope Effects
Isotope Exchange
& Isotope Separation
ANIONS
CHARGED PARTICLES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DATA
DEUTERATION
DEUTERIUM
ELEMENTS
EXPERIMENTAL DATA
HYDRATION
HYDROGEN
HYDROGEN ISOTOPES
HYDROGENATION
INFORMATION
IONS
ISOTOPES
KINETICS
LIGHT NUCLEI
MOTION
NONMETALS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
OXYGEN
REACTION KINETICS
ROTATION
SOLVATION
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K