(1) Laboratory of Organic Chemistry, University of Twente, P.O. Box 217, 7500 AE Enschede, the Netherlands;(2) Laboratory of Chemical Physics, University of Twente, P.O. Box 217, 7500 AE Enschede, the Netherlands
Abstract:
The formation of a stable calix[4]arene monohemiketal is described. X-ray crystallographic data provide conclusive evidence for the presence of a stabilizing hydrogen bond.Supplementary Data. Lists of H-atom parameters and bond lengths and angles involving hydrogens have been deposited with the British Library Document Supply Centre as Supplementary Publication No. SUP 82159 (5 pp.).