Radiochemical study of ion-molecular interaction of free ethylsilicenium ions with benzene in gaseous phase

Radiochemical study of ion-molecular reactions of free ethylsilicenium ions generated by nuclear-chemical method with benzene in gaseous phase in absence of any bases affecting on ways of σ-complex decomposition is carried out. It is shown that labelled with tritium benzene is the main reaction product (73 %) forming as a result of desilylation of σ-complex. Dimethylphenylsilane composes only 3.3 %. With the exception of considered products alkyl-substituted silanes are present in the system too. It is shown that during reaction ethylsilicenium ion is isomerized in dimethylsilicenium one completely. On the basis of obtained experimental data a possible reaction mechanism is proposed