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  • 1
    Electronic Resource
    Electronic Resource
    Rovibronic state to rovibronic state reaction dynamics: O(3P)+HCl(v=2,J)→OH(v′,N′)+Cl(2P) (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 87 (1987), S. 7341-7342 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We report an experimental investigation of the reaction O(3P)+HCl(v=2,J)→OH(v′=0 and 1,N′)+Cl(2P), where HCl is prepared in a single rovibronic level using a tunable optical parametric oscillator and the rovibronic levels of the OH reaction product are monitored using laser-induced fluorescence. The nascent rotational state distributions in OH(v′=0 and 1) have been measured as a function of the initial rotational state J of HCl(v=2). These distributions are substantially rotationally excited and exhibit a shift towards higher N′ as J is increased. Comparable branching into OH(v′=0) and OH(v′=1) is observed. The reaction cross section is found to increase markedly with reagent rotation: the increase is approximately a factor of 3 over the range J=1–10 of HCl(v=2), but is not necessarily monotonic for low J.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.453328
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Determination of methyl radical concentrations in a methane/air flame by infrared cavity ringdown laser absorption spectroscopy (1997)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 107 (1997), S. 6196-6203 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Infrared cavity ringdown laser absorption spectroscopy (IR-CRLAS) is employed to determine absolute methyl radical concentrations in a 37.5 Torr laminar methane/air flame. IR-CRLAS rovibrational absorption spectra of the ν3 fundamental band system near 3200 cm−1 are combined with N2-CARS temperature measurements to obtain methyl radical concentrations as a function of height above the burner surface. These data are compared with flame chemistry simulations under both stoichiometric and rich flame conditions. Issues regarding the applicability of IR-CRLAS for combustion studies are discussed, including the uncertainties present for the specific case of methyl radical. These IR-CRLAS measurements indicate the ability to monitor reactants, intermediates, and products within a narrow spectral window, and, to our knowledge, constitute the first infrared detection of a polyatomic radical in a flame. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.474284
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Generation of ground electronic state haloalkyl radicals in the gas phase (1986)
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 18 (1986), S. 639-649 
    Details
    ISSN: 0538-8066
    Keywords: Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Gaseous haloalkyl radicals were prepared by the photolysis of iodohaloalkanes in Pyrex vessels containing mercury (I) halides. Cleavage of the carbon-iodine bond gave mercury (II) halide and a radical which was subsequently shown to react on the ground state electronic energy surface. The usefulness of this method for chemical activation rate constant studies is illustrated by measurement of unimolecular rate constants for decomposition of CH2ClCH2Cl and CF3CH3. Possible mechanisms for photodecomposition of iodoalkanes in the presence of mercury (I) halides are discussed.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
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