Mechanisms of Decomposition and Oxidation of Borane Compounds,

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.

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Document Details

Document Type
Technical Report
Publication Date
Dec 28, 1992
Accession Number
ADA261137

Entities

People

  • S. H. Bauer

Organizations

  • Cornell University Department of Chemistry and Chemical Biology

Tags

Communities of Interest

  • Human Systems

DTIC Thesaurus Topics

  • Chemical Laboratories
  • Chemical Reaction Properties
  • Chemical Reactions
  • Chemistry
  • Classification
  • Combustion
  • Data Processing
  • Decomposition
  • Degradation
  • Dye Lasers
  • Flow Rate
  • Fragmentation
  • Laser Beams
  • Laser Induced Fluorescence
  • Lasers
  • Measurement
  • Oxidation

Readers

  • Combustion science or combustion engineering.
  • Organic Chemistry