4,4′-Bipyridine–cyclohexane-1,2,4,5-tetracarboxylic acid (1/1)

Abstract

In the title 1:1 adduct, C10H8N2·C10H12O8, the dihedral angle between the pyridine rings in the 4,4-bipyridine molecule is 8.33 (13)°. In the crystal, the cyclo­hexane-1,2,4,5-tetra­carb­oxy­lic acid mol­ecules inter­act with each other through inter­molecular O—H⋯O hydrogen bonds, forming an infinite chain along the a axis, which is further linked perpendicularly by O—H⋯N hydrogen bonds involving bipyridine, resulting in a supra­molecular corrugated sheet parallel to the (110) plane.

Even–odd effect in the co-crystals of pyrazine and dicarboxylic acids

“…On the other hand, some dicarboxylic acids were also used for co-crystallization (e.g. [25][26][27][28][29] ). It seemed also interesting to recognize if the even-odd effect will be visible in this series of compounds.…”