Supramolecular self-assembly between symmetric tetramethyl cucurbit[6]uril and dimethylphenylpiperazine hydrochloride

Abstract

The interaction between symmetric tetramethyl cucurbit[6]uril (TMeQ[6]) and 2,3-dimethylphenylpiperazine hydrochloride (PMY) has been studied in the presence of [CdCl4]2−. Each port of the TMeQ[6] is connected to PMY through weak interactions such as ion dipole interactions and CH⋯O hydrogen bonding interactions, whilst the [CdCl4]2− is connected with the portal carbonyl oxygen, glycoside urea methylene and a bridging methylene of a TMeQ[6] molecule via ion–dipole interactions. These interactions were evident from a single crystal X-ray diffraction study of TMeQ[6]-PMY-[CdCl4]2−. In addition, the complex can form a one-dimensional supramolecular chain structure, and then assemble into a two-dimensional supramolecular framework, which can be described as a TMeQ[6]-PMY-[CdCl4]2− based supramolecular framework (QSF).