OH Clusters with Homodromic Circular Arrangement of Hydrogen Bonds

Abstract

The decisive influence of the cooperative effect on formation and direction of H bonds has been confirmed by X-ray structure analysis of an OH cluster in α-cyclodextrin hexahydrate. This structure contains two rings of H bonds. Interactions are homodromic (in the same sense) in two of them, and antidromic (opposing) in the other one.