title: trans-Diaqua-bis-(1H imidazolium-4,5-di-carboxyl-ato-κ(2)O(4),O(5))magnesium.
abstract: The title compound, [Mg(C(5)H(3)N(2)O(4))(2)(H(2)O)(2)], consists of centrosymmetric neutral monomers in which two O,O'-bidentate imidazolinium-4,5-dicarboxyl-ate ligands are bonded to the Mg(II) ion. One of the carboxyl protons is transferred to the N atom of the imidazole ring. The octa-hedral metal-ion coordination is completed by two trans water O atoms. In the crystal, mol-ecules are linked by N-H⋯(O,O) and O-H⋯O hydrogen bonds.
authors.affiliation: Institute of Nuclear Chemistry and Technology, ul.Dorodna 16, 03-195 Warszawa,  Poland.
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Luczyńska-Szymczak
authors.forename: Wojciech
authors.initials: W
authors.lastname: Starosta
authors.forename: Janusz
authors.initials: J
authors.lastname: Leciejewicz