Structural analysis of bis-bispidine tetraazamacrocycle: Long-range weak interactions in a channeled organic crystal

A new organic crystal containing one-dimensional channels has been obtained through the synthesis and self-assembly of tetraethoxy bis-bispidine tetraazamacrocycles. The pre-fabricated macrocyclic cavities stack on each other to form ordered channels with highly basic inner cores. Based on the data of the single crystal structure, analysis of a 3D matrix indicates that weak directional interactions such as long-range CH⋯O hydrogen bonds and NC⋯OC dipole–dipole interactions play an important role in the molecular alignment.