Abstract: | Hexamethylenetetramine and rac‐trans‐1,2‐cyclohexanedicarboxylic acid crystallize in a 1:1 ratio as a neutral molecular adduct, C6H12N4·C8H12O4. Two dicarboxylic acid molecules and two tetramine molecules form a hydrogen‐bonded ring, in the shape of a rhombus, which lies on a crystallographic twofold axis bisecting the two diacid molecules. The O—H?N hydrogen bonds have lengths 2.6808 (19) and 2.6518 (19) Å, and, in each ring, both acid molecules have the same handedness. |