Acta Cryst. (2004). E60, m35-m37  [ doi:10.1107/S1600536803027491 ]

Hexaaquacobalt(II) trans-bis(³-pyridine-2,6-dicarboxylato-³O,N,O')cobaltate(II) dihydrate

K.-B. Shiu, C.-H. Yen, F.-L. Liao and S.-L. Wang

Abstract: The title compound, [Co(H₂O)₆][Co(C₇H₃NO₄)₂]·2H₂O, was obtained by a hydrothermal reaction of cobalt chloride hexahydrate, 2,6-pyridinedicarboxylic acid, and Et₃N (molar ratio 1:1:7). The compound contains six-coordinated Co^II ions, with six O atoms of water molecules attached to the Co atoms in the two independent centrosymmetric cations and four O and two N atoms of two trans 2,6-pyridinedicarboxylate groups bonded to the Co atom in the anion. Intermolecular hydrogen-bonding interactions are present, linking the cobalt complex cations, anions and uncoordinated water molecules in the crystal structure.

Online 12 December 2003

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