Collisionally activated dissociation of 2,4,6-triphenylpyridinium cations |
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| Authors: | Alan R Katritzky N Malhotra Zofia Dega-Szafran G Paul Savage John R Eyler Clifford H Watson |
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| Abstract: | Thresholds for the appearance of fragment ions allowed the estimation of threshold fragmentation energies (TFE) for the collisionally activated dissociation (CAD) in the gas phase of laser-desorbed pyridine-ring substituted N-benzylpyridinium cations to form pyridine and a carbocation. p-Methylbenzylpyridinium cation underwent an alternative CAD into pyridinium cation and the p-quinodimethane. The TFE are discussed in comparison with the energy differences (ΔΔHf = ΔHf(Py) + ΔHf(R+) ? ΔHf(Py +R) calculated by the AM1 method to provide strong evidence for benzyl to tropylium cation rearrangement in an ion-molecule pair. |
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