Acta Cryst. (2004). E60, m479-m481 [ doi:10.1107/S1600536804006415 ]
Abstract: The reaction of ytterbium(III) chloride with a self-assembling pyridine-containing ligand system, [H2pyda]2+[pydc]2- [pyda is 2,6-diaminopyridine (C5H7N3) and pydcH2 is 2,6-pyridinedicarboxylic acid (C7H5NO4)], in water leads to the formation of the title YbIII complex, (H5O2)(Hpyda)2[Yb(pydc)3]·2H2O. The Yb atom lies on a twofold rotation axis and is nine-coordinate with a distorted tricapped trigonal-prismatic geometry. The formula unit of the complex contains one (H5O2)+ dihydronium cation on a twofold rotation axis, two protonated pyda molecules and two water molecules.
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