Generation and characterization of all halogen-substituted silylium ions of the type [Alk2XSi(HCB11H5Br6)] (X = F, Cl, Br or I; Alk = Me, Et, iPr or tBu)

Generation and characterization of all halogen-substituted silylium ions of the type [Alk2XSi(HCB11H5Br6)] (X = F, Cl, Br or I; Alk = Me, Et, iPr or tBu)