Proton Binding The Simplest Cation

8 Ratcliffe, C. I., Irish, D. E., The nature of the hydrated proton, in Water Science Reviews 3, Franks, F., ed. Cambridge University Press Cambridge, 1988 pp 1-78. 

Crown ethers as stabilising ligands for oxoninm ions . New J. Chem., 2008,32, 762-773. 

The elegant match of for [18]crown-6 suggests that the crystallisation of crown ether and cryptand complexes from acidic liquid clathrate media might represent a straightforward 

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Calculations also predict H2 binding to several other types of Lewis acidic sites, including nontransition metal cations and ionic solids such as BeO.228 233 The simplest such species is H3, formed by protonation of H2 (dHH = 0.87 A). Similar... 

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