Zero-, one-, two- and three-dimensional supramolecular architectures sustained by SeO chalcogen bonding: A crystallographic survey.

The Cambridge Structural Database was evaluated for crystals containing SeO chalcogen bonding interactions. These secondary bonding interactions are found to operate independently of complementary intermolecular interactions in about 13% of the structures they can potentially form. This number rises significantly when more specific interactions are considered, e.g. SeO(carbonyl) interactions occur in 50% of cases where they can potentially form. In about 55% of cases, the supramolecular assemblies sustained by SeO(oxygen) interactions are one-dimensional architectures, with the next most prominent being zero-dimensional assemblies, at 30%.