Crystal structure, Hirshfeld surface analysis and contact enrichment ratios of 1-(2,7-dimethylimidazo[1,2-a]pyridin-3-yl)-2-(1,3-dithiolan-2-ylidene)ethanone monohydrate

Abstract

In the title hydrated hybrid compound C14H14N2OS2·H2O, the planar imidazo[1,2-a]pyridine ring system is linked to the 1,3-dithiolane moiety by an enone bridge. The atoms of the C—C bond in the 1,3-dithiolane ring are disordered over two positions with occupancies of 0.579 (14) and 0.421 (14) and both disordered rings adopt a half-chair conformation. The oxygen atom of the enone bridge is involved in a weak intramolecular C—H...O hydrogen bond, which generates an S(6) graph-set motif. In the crystal, the hybrid molecules are associated in R22(14) dimeric units by weak C—H...O interactions. O—H...O hydrogen bonds link the water molecules, forming infinite self-assembled chains along the b-axis direction to which the dimers are connected via O—H...N hydrogen bonding. Analysis of intermolecular contacts using Hirshfeld surface analysis and contact enrichment ratio descriptors indicate that hydrogen bonds induced by water molecules are the main driving force in the crystal packing formation.

Keywords

• crystal structure
• hybrid molecule
• hirshfeld surface analysis
• enrichment contact
• hydrogen bond