Acta Cryst. (2007). E63, m2575  [ doi:10.1107/S1600536807044893 ]

[-4,7-Dioxa-1,10-diazaoctane-1,1,10,10-tetraacetat0-1⁴O¹,O^1',N¹,O⁴:2⁴O⁷,N¹⁰,O¹⁰,O^10']bis[aquanickel(II)] dihydrate

H.-Q. Liu

Abstract: The Ni atom in the title complex, [Ni₂(C₁₄H₂₀N₂O₁₀)(H₂O)₂]·2H₂O or {[Ni₂(egta)·2H₂O]·2H₂O}] [egtaH4 is 3,12-bis(carboxymethyl)-6,9-dioxa-3,12-diazatetradecanedioic acid], has a square-pyramidal coordination geometry. Both Ni^II centres are pentacoordinated by one N atom and three O atoms of egta, forming the basal plane, and one O donor water molecule in the apical position. The dinuclear complex is arranged around an inversion centre. The solvent water molecules and coordinated water molecules are involved in hydrogen bonds with uncoordinated O atoms of carboxylate groups, which link the complex molecules to form a three-dimensional supramolecular network structure.

Online 21 September 2007

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