Accession Number : ADA261137


Title :   Mechanisms of Decomposition and Oxidation of Borane Compounds,


Corporate Author : CORNELL UNIV ITHACA NY DEPT OF CHEMISTRY


Personal Author(s) : Bauer, S H


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a261137.pdf


Report Date : 28 Dec 1992


Pagination or Media Count : 3


Abstract : The rates of gas phase reactions between boranes (B2H6; B5H9; B1OH14) and oxygen atoms (3P state) were studied (- 350K) in a flow-tube reactor by determining time dependent levels of OH species, as functions of reactant concentrations. Quantitative fitting of these data for B2H6 and B5H9 led to mechanisms, and estimated rate constants, for the direct attack on the boranes, and for reactions of O(3P) with fragmentation products (in particular, HBO and HBOH). A degradation sequence was established for each. Measurements (via LIF) of [OH] from B1OH14 were not completed; our data show that under comparable conditions the deca produces -60 fold higher [OH] than does penta. Our QPMS diagnostic of a newly designed flow-tube system and revitalized mass-spectrometer permitted evaluation of a rate constant for the net destruction of B5H9, and qualitative estimates of relative concentrations of B5H9 fragmentation products.


Descriptors :   *OXIDATION , *DECOMPOSITION , *BORANES , VAPOR PHASES , MECHANICS , HYDROXYL RADICALS , MASS SPECTROMETERS , CHEMICAL REACTIONS , OXYGEN


Subject Categories : Organic Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE