5,17-Bis(acetamido-25,26,27,28-tetrapropoxycalix[4]arene; the first example of two different pinched cone conformations in the solid state

Willem Verboom, Remko H. Vreekamp, Paul J. Bodewes, Sybolt Harkema, David N. Reinhoudt

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Abstract

Crystals of 5,17‐bis(acetamido)‐25,26,27,28‐tetrapropoxycalix[4]arene · ethyl‐acetate (1: 1), C44H54N2O6 · C4H8O2 are triclinic, space group P‐1, a = 13.319(4), b = 15.519(4), c = 22.386(6) Å, α = 104.73(3), β = 99.02(3), γ = 95.30(3)°, T = 100(5) K, Z = 4. The asymmetric unit contains two calix[4]arene molecules and two ethyl acetate molecules. The two calix[4]arene molecules have different pinched cone conformations. The phenyl rings show small but consistent boat‐like deformations. The final R factor is 7.9%.
Original languageEnglish
Pages (from-to)402-406
JournalRecueil des travaux chimiques des Pays-Bas
Volume115
Issue number9
DOIs
Publication statusPublished - 1996

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