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- Wipff , G. and Lauterbach , M. in preparation
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- Caldwell , J. W. and Kollman , P. A. 1995 . J. Am. Chem. Soc , 117 : 4177 A recent theoretical study showed that nonadditive effects are critical in the accurate representation of cation-π interactions. Standart 1–6–12 pairwise additive potentials underestimate the interaction energy of Li+, Na+, K+ with benzene by about 23, 13, and 8 kcal / mole, respectively, compared to nonadditive potentials. Based on these results, one can anticipate that the nonadditivity correction for Cs+ would be smaller than for these cations. This strengthens our conclusion that intrinsically, in the gas phase, Na+ is complexed better than Cs+ by the calixarenes, and that the Cs+ preferred binding in solution (in water, methanol, or acetonitrile) is mostly driven by differential solvation effects.