Evidence for C–H^…O and C–H^…π Hydrogen Bonding from Comparison of the Crystal Packing of Two Dibenzo-Azacrown Ethers

Tina Ventrice, Eva M. Campi, Gary D. Fallon, W. Roy Jackson, Peter C. Junk, Peter J. Nichols and Antonio F. Patti

Abstract

Crystal-packing data for a 17-membered ring NO₄ dibenzo macrocycle shows interesting curvature complementarity, which is ascribed to intermolecular C–H^…O and C–H^…π interactions in contrast to a related 22-membered ring N₂O₄ dibenzo macrocycle which shows regular layer packing.

Australian Journal of Chemistry 55(12) 779 - 781 (2002) doi:10.1071/CH02161