Accession Number : ADA183648

Title :   Reactions of C3H3+ with Acetylene and Diacetylene in the Gas Phase.

Descriptive Note : Technical rept. 1 Sep 85-1 Sep 86,

Corporate Author : FLORIDA UNIV GAINESVILLE DEPT OF CHEMISTRY

Personal Author(s) : Ozturk,F ; Baykut,G ; Moini,M ; Eyler,J R

PDF Url : ADA183648

Report Date : 29 Jul 1987

Pagination or Media Count : 16

Abstract : The reactions of linear C3H3(+) with acetylene, diacetylene and deuterated acetylene were investigated using a Fourier transform ion cyclotron resonance (FTICR) mass spectrometer. A rate coefficient of (1.4 + 0.7) X 10 to the 9th cc/s was obtained for the reaction of linear C3H3(+) with diacetylene while no production of larger ions was observed with acetylene. Using the ejection capabilities of FTICR, reactions of different C3H3+ precursors with C2H2 were studied in order to investigate possible production of C5H5+ from ionic sources other than C3H3+ present in the reaction medium. Linear C3H3+ isomerized to the cyclic form in reactions with both acetylene and diacetylene. The isomerization was shown to take place via a long-lived C5H5+ complex by isotope exchange reactions between linear C3H3 and deuterated acetylene. Results are discussed in relation to previous work involving C3H3+ reactions and a proposed ionic route to soot formation. Keywords: Fourier transform, Ion cyclotron resonance, Mass spectrometry, Hydrocarbon ions, Soot formation.

Descriptors :   *ACETYLENE, *GASES, *PROPYL RADICALS, FOURIER TRANSFORMATION, HYDROCARBONS, IONS, EXCHANGE REACTIONS, ISOTOPE EXCHANGE, MASS SPECTROMETRY, COEFFICIENTS, RATES, SOOT, EJECTION, CYCLOTRON RESONANCE, ISOMERIZATION, PRODUCTION, RESPONSE, CYCLIC COMPOUNDS, CHEMICAL REACTIONS

Subject Categories : Organic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE