Bis(mu-acetylacetonato-kappa O-2 : O ')bis[(acetyl-acetonato-kappa O-2,O ')aquanickel(II)] hemihydrate

The structure of the title complex, [Ni-2(C5H7O2)(4)(H2O)(2)](.)-0.5H(2)O, is dimeric and corresponds to the trimeric structure of bis(acetylacetonato)nickel(II) in which one Ni(acac)(2) unit is replaced by two water molecules. The centrosymmetric molecule comprises two O-O edge-shared octahedra. The asymmetric unit contains two half-molecules of the complex and one water molecule.