Organic molecular tessellations and intertwined double helices assembled by halogen bonding. Issue 7 (23rd January 2019)

• Record Type: Journal Article
• Authors: Ng, Chun-Fai; Chow, Hak-Fun; Mak, Thomas C. W.
• Is Part Of: CrystEngComm. Volume 21:Issue 7(2019)
• Page Start: 1130
• Page End: 1136
• Publication Date: 2019-01-23
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c8ce02133c
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : Crystalline polymorphs featuring halogen-bonded single-component supramolecular polygonal tessellations, a network of 41 - and 43 -double helices, and intertwined 31 and 32 meso -helices. Abstract : 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.