Computationally Based Measures of Amine Azide Basicity and Their Correlation With Hypergolic Ignition Delays

Abstract

To explore a hypothesis that hypergolic ignition delays for fuel-nitric acid combinations are a function of the fuel's basicity, measures of base strength are computed for various azides, amines, amine azides, and hydrazines and compared to ignition delay data. Measures of base strength considered include gas-phase proton affinities, heats of neutralization for reactions leading to ion pairs, and heats of reaction for fuel-nitric acid complexation. The measures quantify substituent-mediated basicity differences between sites with lone pair electrons, but they do not appear to be good predictors of ignition delay. The failure of the hypothesis is discussed.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 2003
Accession Number
ADA420016

Entities

People

  • Michael J. McQuaid

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Acids
  • Chemical Compounds
  • Chemical Reaction Properties
  • Chemical Synthesis
  • Chemistry
  • Combustion
  • Dielectric Permittivity
  • Heat Of Neutralization
  • Hydrazines
  • Hypergolic Ignition
  • Ignition
  • Ignition Lag
  • Liquid Rocket Oxidizers
  • Nitric Acid
  • Nitrogen Compounds
  • Quantum Chemistry
  • Rocket Oxidizers

Readers

  • Analytical Chemistry
  • Quantum Chemistry
  • Rocket Propulsion.

Technology Areas

  • Microelectronics