Abstract
This work reports evidence for novel types of Xe-bearing hydrocarbon radical cations. The Xe.acetylene+ radical cation adduct is observed at nearly room temperature using the mass-selected drift cell technique. The irreversible addition of the Xe atom and the lack of back dissociation to HCCH++Xe is consistent with the calculated binding energy of 0.85eV to be contrasted with the metastable nature of the neutral Xe.acetylene adduct. The observed Xe.benzene+ radical cation appears to be a weakly bound complex stabilized mainly by ion-induced dipole interaction consistent with a calculated binding energy in the range of 0.14⿿0.17eV.
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