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DOI: 10.1039/A605586I (Paper) Reference Section for: J. Chem. Soc., Perkin Trans. 2, 1997, 223-228

Calix[4]arene dimers; self-assembly via hydrogen bonding at the upper rim

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Oliver Struck, Willem Verboom, Wilberth J. J. Smeets, Anthony L. Spek and David N. Reinhoudt

Abstract

The X-ray structure determination of calix[4]arenedicarboxylic acid unequivocally proves the self-assembled dimeric structure in the solid state. Also in apolar solvents two calix[4]arene molecules are connected via carboxylic acid moieties at the upper rim. NMR studies show that in polar solvents the calix[4]arenedicarboxylic acid is present as a monomer with a pinched cone conformation that differs from the dimeric structure in apolar solvents.

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