Crystallography of Organic Compounds

C288 this compound is crystallized from solutions in acethophenone as a host-guest complex with a ratio 2:3. In the crystal structure DEDA molecules form infinite chains in a direction [01-1] through a pair of centrosymmetric hydrogen bonds. The acethophenone molecules are situated inside different channels formed at stacking of these chains and running along [100] and [0-11] directions. At decreasing of crystallization temperature until 5C from the same solution DEDA crystallizes as new complex hydrate with 1:3 host-guest ratio. In the crystal structure one carboxylic group of DEDA molecules is connected via centrosymmetric H-bonding with the carboxylic group of the other host molecule, while other carboxylic group is deprotonated giving rise to a network of intermolecular H-bonds associating with one ion of hydroxonium (H3O) and two molecules of water. The structure may be described as intercalate type complex with strict separation of the hydrophobic and hydrophilic areas. L.I. is grateful to NATO Reintegration Grant (Rig.Ref. 980768) for scholarship.