Experimental Crystal data

R factor = 0.038; wR factor = 0.096; data-to-parameter ratio = 10.2. In the title salt hydrate, C2H10N2 2+C12H10N2O624H2O, each of the ions is located about a centre of inversion and the asymmetric unit is completed by two water molecules in general positons. In the crystal, the cations, anions and water molecules are connected by O—H O and N—H O hydrogen bonding into a three-dimensional network. Related literature The starting material, 2,20-(benzene-1,4-dicarboxamido)-diacetatic acid, was prepared by the method of Cleaver & Pratt (1955). For related organic structures, see: Armelin et al. (2001); Ray et al. (2006). For crystal strucutres of d-block elements with 2,20-(terephthaloylbis(azanediyl))diacetate an