Chun-Fai Ng, Hak-Fun Chow and Thomas C. W. Mak
CrystEngComm, 2019,21, 1130-1136
DOI:
10.1039/C8CE02133C,
Paper
Isomeric 2,5- and 2,6-bis(iodoethynyl)pyrazine have been employed to assemble single-component polygonal molecular tessellations and intertwined double helices via intermolecular ethynyl C—I⋯N halogen bonding. X-ray crystallography elucidated the 3D supramolecular architectures of five ditopic heteroaromatic polymorphs obtainable via crystallization in various organic solvents.
