David Osborne - Flowing afterglow studies of the electron recombination of protonated cyanides (RCN)H+ and their proton-bound dimer ions (RCN)2H+ where R is H, CH3, and CH3CH2

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  Publication Details (including relevant citation   information):

  International Journal of Mass   Spectrometry

    Volume 282, Issue 3, 1 May 2009, Pages 85-90

  Abstract:

  A study has been made of the electron–ion dissociative   recombination of the protonated cyanides (RCNH+, R =   H, CH3, C2H5) and their   proton-bound dimers (RCN)2H+ at 300 K. This   has been accomplished with the flowing afterglow technique using   an electrostatic Langmuir probe to determine the electron density   decay along the flow tube. For the protonated species, the   recombination coefficients, αe(cm3  s−1), are (3.6 ± 0.5) × 10−7, (3.4 ± 0.5) ×   10−7, (4.6 ± 0.7) × 10−7 for R = H,   CH3, C2H5, respectively. For the   proton-bound dimers, the αe are substantially   greater being (2.4 ± 0.4) × 10−6, (2.8 ± 0.4) ×   10−6, (2.3 ± 0.3) × 10−6 for R = H,   CH3, C2H5, respectively. Fitting   of the electron density decay data to a simple model has shown   that the rate coefficients for the three-body association of   RCNH+ with RCN are very large being (2.0 ± 0.5) ×   10−26 cm6 s−1. The significance   of these data to the Titan ionosphere is discussed.

  Address (URL): http://www.sciencedirect.com/science/article/pii/S1387380609000608

 

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