A series of substituted adamantane-l, 3-dimethyldiyl dications 5 has been prepared by the ionization of a, a, a', a'-tetrasubstituted-1, 3-adamantanedimethyl diols 6 in superacidic media. The dications were stable with groups such as phenyl and methyl, however, unstable with cyclopropyl groups. The 13C NMR spectroscopic study of the obtained dications clearly indicates that the positive charges are more delocalized into the substituents due to the ...
