Dihydronium 2,6-diaminopyridinium tris(2,6-pyridinedicarboxylato) ytterbate(III) dihydrate

چکیده مقاله

The reaction of ytterbium(III) chloride with a self-assembling pyridine-containing ligand system, [H₂pyda]²⁺[pydc] ^2- [pyda is 2,6-diaminopyridine (C₅H₇N ₃) and pydcH₂ is 2,6-pyridine-dicarboxylic acid (C ₇H₅NO₄)], in water leads to the formation of the title Yb^III 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. © 2004 International Union of Crystallography Printed in Great Britain - all rights reserved.