Intermolecular axial solvation of bound cations by sidearm donor groups in lariat ethers: formation of a supramolecular network
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Previously studied disubstituted 4,13-diaza-18-crown-6 derivatives, R < N18N > R, in which the substituents were cyanomethyl or propargyl did not show intramolecular, lariat-type cation solvation. The ring-bound cation in the propargyl derivative is solvated by the six macroring heteroatoms and apically by a bifurcated interaction of the type F···K +···F. In contrast, when the sidearm is cyanoethyl, an extended intermolecular network forms when the bound cation is either Na + or K +. © 2001 Published by Elsevier Science B.V.
author list (cited authors)
Barbour, L. J., De Wall, S. L., Ferdani, R., Fronczek, F. R., & Gokel, G. W.