Hierarchical halogen bonding induces polymorphism?

CrystEngComm Pub Date: 2009-02-03 DOI: 10.1039/B821085N

Abstract

Co-crystals of 1-iodo-3,5-dinitrobenzene and 1,4-diazabicyclo[2.2.2]octane manifest either two strong or one strong and one weak intermolecular 2?:?1 halogen bond (XB) motifs in polymorphic structures I and II, respectively, whereas weaker XB-donor 4,4-bipyridine just forms 1?:?1 structure III with one strong halogen bond.

Graphical abstract: Hierarchical halogen bonding induces polymorphism
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