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The acidic strength of selected Lewis–Brønsted superacids consisting of HClO4 Brønsted acid and containing the excess of either AlF3 or SbF5 Lewis acid component is evaluated on the basis of theoretical calculations employing ab initio methods. The Gibbs free energies of deprotonation processes for HClO4/n(AlF3) and HClO4/n(SbF5) (n = 1–3) are found to depend on the number (n) of AlF3 or SbF5 molecules...
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