Acta Cryst. (2009). E65, m1374-m1375  [ doi:10.1107/S1600536809041634 ]

(Propane-1,3-diammonium) bis(4-hydroxypyridine-2,6-dicarboxylato-³O²,N,O⁶)zinc(II) 3.5-hydrate

M. Ghadermazi, F. Manteghi and H. Aghabozorg

Abstract: The asymmetric unit of the title compound, (C₃H₁₂N₂)[Zn(C₇H₃NO₅)₂]·3.5H₂O, contains two formula units. The compound consists of an anionic complex, a doubly protonated propane-1,3-diamine as a counter-ion and 3.5 uncoordinated water molecules. The coordination polyhedron around the Zn^II atom is distorted octahedral, defined by four O atoms and two N atoms from two Hchel (H₃chel = 4-hydroxypyridine-2,6-dicarboxylic acid) ligands. In the crystal structure, O-HO, N-HO and C-HO hydrogen bonds along with - stacking interactions [centroid-centroid distance = 3.473 (2) Å] are observed to reinforce the crystal cohesion.

Online 17 October 2009

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