Acta Cryst. (2008). E64, m1168-m1169  [ doi:10.1107/S1600536808025713 ]

(4-Oxido-2-oxo-1,2-dihydropyrimidine-5-carboxylato-²O⁴,O⁵)(4-oxido-2-oxo-1,2-dihydropyrimidin-3-ium-5-carboxylato-²O⁴,O⁵)bis(1,10-phenanthroline-²N,N')gadolinium(III) dihydrate

W. Xiong, H. Xing, Y. Su and Z. Chen

Abstract: The title compound, [Gd(C₅H₂N₂O₄)(C₅H₃N₂O₄)(C₁₂H₈N₂)₂]·2H₂O, was obtained from a solvothermal reaction of 2,4-dihydroxypyrimidine-5-carboxylic acid (H₃iso), GdCl₃·6H₂O and 1,10-phenanthroline (phen). The Gd^III ion is located on a twofold rotation axis and is coordinated by four N atoms from two chelating phen ligands and four O atoms (5-carboxylate and 4-oxido O atoms) from H₂iso^- and Hiso^2- ligands. The molecules are linked into a three-dimensional network by N-HO, N-HN and O-HO hydrogen bonds. The H atom involved in an N-HN hydrogen bond is disordered around a twofold rotation axis with half occupancy.

Online 16 August 2008

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