Effects of Hydration on Reactions of O-(H2O)n (n=0-2). 2. Reactions with H2 and D2
Abstract
The rate constants for the reactions of O(-) (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 (<KE sub cm>) 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 <KE sub cm>. Both associative detachment and a channel that produces OH (-) are observed. The minor (< 15%) OH (-) channel becomes more important at higher temperatures and <KE sub cm). 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 (-) (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 our detectable limit. No dependence on rotational energy was found in either the rate constant or the branching ratio for n=0.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1991
- Accession Number
- ADA248042
Entities
People
- Albert A Viggiano
- Carol A. Deakyne
- F. Dale
- John F. Paulson
- Robert A. Morris
Organizations
- Phillips Laboratory