Crystal structure of 4,4′-(disulfanediyl)dibutanoic acid–4,4′-bipyridine (1/1)

• Main Authors: Ana María Atria, Maria Teresa Garland, Ricardo Baggio
• Format: Article
• Language: English
• Published: International Union of Crystallography 2014-09-01
• Series: Acta Crystallographica Section E
• Subjects: crystal structure; hydrogen-bonding disposition; co-crystal
• Online Access: http://scripts.iucr.org/cgi-bin/paper?S1600536814018558

4,4′-(Disulfanediyl)dibutanoic acid (dtba) and 4,4′-bipyridine (4,4′-bpy) crystallize in an 1:1 ratio, leading to the title co-crystal with composition C8H14O4S2·C10H8N2. A distinctive feature of the crystal structure is the geometry of the dtba moiety, which appears to be stretched [with a 9.98 (1) Å span between outermost carbons] and acts as an hydrogen-bonding connector, forming linear chains along [-211] with the 4,4′-bpy moiety by way of O—H...N hydrogen bonds and C—H...O interactions. The influence of the molecular shape on the hydrogen-bonding pattern is analysed by comparing the title compound and two other 4,4′-bpy co-crystals with closely related molecules of similar formulation but different geometry, showing the way in which this correlates with the packing arrangement.