The absolute rate constant for the reaction NH 2 + NO + products has been measured at five temperatures ranging from 216 to 480 K by the technique of flash photolysis-laser induced fluorescence (FP-LIF'). NH 2 radicals were produced by the flash photolysis of ammonia and the fluorescent NH 2 photons were measured by multiscaling techniques. At each temperature, the results were independent of variations in [NO], total pressure, and flash intensity

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The effects of pressure, temperature and wavelength of the fluorescence of n-butyraldehyde and iso-butyraldehyde have been investigated (l). At 3340 A, the fluorescence yield decreases slightly with increase

The reactions of sec-propyl ions produced in the radiolysis of n-C4D10 and i-C4D10 with hydrocarbons has been investigated. When the additive (RH) is a saturated hydrocarbon, the hydride transfer reaction: C3D7++RH→C3D7H+R+is the major mode of reaction. For straight chain hydrocarbons, the cross section of this reaction, relative to that of the reference reaction C3D7++C4D10→C3D8+C4D9+is shown to increase with the molecular weight of RH. For different hydrocarbon isomers, the relative cross section of the hydride transfer reaction decreases with an increase in branching while the analogous reactions involving ethyl ions show no such discrimination. From the isotopic analysis of the propanes and propylenes produced in the radiolysis of C4D10 carried out in the presence of olefins, it was concluded that the proton transfer reactionC3D7++RH→C3D6+RHD+occurs. Comparison of the data obtained, using C3D8, n-C4D10, and i-C4D10 as sources of ethyl or propyl ions, indicated that the relative cross sections of the hydride transfer reactions are independent of the origin of the carbonium ion.

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