Abstract
AbstractProton transfer reactions in clusters of aromatic cations and polar molecules have been studied by resonant two‐photon ionization spectroscopy. Two types of protonation reactions have been observed. While cations of methylated derivatives of benzene may act as an acid, inducing a direct proton transfer to the solvent, cations of non‐methylated derivatives may be neutralised by electron transfer with the solvent moiety, followed by intrasolvent proton transfer. If the derivative contains different substituents (o‐chlorotoluene), proton transfer competes with nucleophilic substitution. The branching ratio of both channels depends on the number of solvent molecules in the cluster.
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