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Classical Lewis acid-base adducts, previously thought to be unreactive, can provide access to the unique reactivity of frustrated Lewis pairs. This was demonstrated with a mixture of 2,6-lutidine and B(C(6)F(5))(3) where an equilibrium affords the adduct and yet also effects the heterolytic activation of H(2) and the ring opening of THF.
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Geier et al. (2009) studied this question.
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