Accession Number : AD0758369

Title :   The Homogeneous Gas Phase Hydrogen-Deuterium Metathesis at Room Temperature: Reaction Induced by Specific Vibrational Excitation,

Corporate Author : CORNELL UNIV ITHACA N Y DEPT OF CHEMISTRY

Personal Author(s) : Bauer,S. H. ; Lederman,D. M. ; Resler,E. L. , Jr. ; Fisher,E. R.

Report Date : 1972

Pagination or Media Count : 26

Abstract : The authors have demonstrated that reactions for which substantial activation energies are needed can be induced to occur at room temperature via specific vibrational excitation. Indeed, the indications are that the atom switching reactions for which E(a) > 25 kcal, take place with high probability only when the activation energy is localized in the vibrational mode. In this preliminary report on the use of the stimulated raman effect to generate substantial populations in the critical vibrational states required for the homogeneous atom exchange between H2 and D2, the authors first summarized the historical development of the concept. The experimental arrangement is then described and the analytical results tabulated; the observed dependence on relative concentrations is semiquantitatively rationalized on the basis of a model proposed in 1964. Independent shock tube and molecular beam investigations were similarly accounted for. (Author Modified Abstract)

Descriptors :   (*HYDROGEN, *EXCHANGE REACTIONS), (*DEUTERIUM, EXCHANGE REACTIONS), HEAT OF ACTIVATION, REACTION KINETICS

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE