Dynamic Chiral Cyclohexanohemicucurbituril
2020-07-06T12:27:15Z (GMT) by
This research with title "Dynamic chiral cyclohexanohemicucurbituril" is dedicated to the memory of late Professor Hans J. Reich.
Abstract:NMR and DFT studies of chiral cyclohexanohemicucurbituril indicate that the macrocycle adopts a concave octagon shape with three distinct ranges of conformational flexibility in solution. Methylene bridge flipping occurs at temperatures above 265 K, while urea monomers rotate at temperatures above 308 K resulting in the loss of confined space within the macrocycle.