Accession Number : ADA296061

Title :   Spectroscopic Study of Reaction Intermediates and Mechanisms in Nitramine Decomposition and Combustion.

Descriptive Note : Final rept. 20 Mar 92-19 Mar 95,

Corporate Author : NATIONAL INST OF STANDARDS AND TECHNOLOGY GAITHERSBURG MD MOLECULAR PHYSICS DIV

Personal Author(s) : Jacox, Marilyn B.

PDF Url : ADA296061

Report Date : 20 MAY 1995

Pagination or Media Count : 40

Abstract : The infrared spectra of reaction intermediates trapped in solid neon were studied in order to support the development of diagnostics for short-lived species which are reaction carriers in nitramine decomposition and combustion and to derive information about reactions which are important in the condensed-phase decomposition of nitramines. Nitromethane and monomethylnitramine were used as model compounds in these studies. Evidence was obtained for the formation of water complexes with both of these species. The results support the water-catalyzed decomposition mechanism for nitramines that was proposed by Melius. Studies of the photodecomposition of isotopically substituted monomethylnitramine demonstrate that four different groups of products are formed. Tentative spectral assignments are made for the aci-isomer of monomethylnitramine and for CH3NHONO. The final photodecomposition products are CH4, NO, CH3OH, and N20. Other studies have provided evidence for the formation of a weakly bonded complex of H2 with H20, as well as spectral data for the HCC free radical and for the H20+, N02+, NO(2-), and NO(3-), molecular ions.

Descriptors :   *SPECTROSCOPY, *COMBUSTION, *DECOMPOSITION, *NITRAMINES, WATER, SOLIDS, SHORT RANGE(TIME), SPECTRA, RESPONSE, DIAGNOSIS(GENERAL), FREE RADICALS, NEON, INFRARED SPECTRA, NITROMETHANE, PHOTODECOMPOSITION, MOLECULAR IONS.

Subject Categories : Organic Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE