Oudahmane Abdelghani, Mnaouer Noura, El-Ghozzi Malika, Avignant Daniel
Université Blaise Pascal, Laboratoire des Matériaux Inorganiques, UMR CNRS 6002, 24 Avenue des Landais, 63177 Aubière, France.
Acta Crystallogr Sect E Struct Rep Online. 2010 Dec 24;67(Pt 1):i6-i7. doi: 10.1107/S160053681005350X.
Single crystals of the title compound, K(2)[Ni(H(2)O)(6)]ZrF(6), were grown by slow evaporation of a 40% aqueous HF solution in which a stoichiometric mixture of NiCl(2)·6H(2)O, ZrF(4) and KCl was dissolved. The monoclinic structure is isotypic with its K(2)Cu, K(2)Zn, Cs(2)Zn and Cs(2)Cu analogues. The structure is built up from isolated, slightly elongated octa-hedral Ni(H(2)O)(6) complex cations (symmetry ) and dimeric Zr(2)F(12) complex anions (symmetry ) that are also isolated from each other. The Zr(2)F(12) anion results from the association of two distorted penta-gonal-bipyramidal [ZrF(7)] coordination polyhedra by sharing an equatorial edge passing through an inversion center of the unit cell. Both isolated Ni(H(2)O)(6) and Zr(2)F(12) complex ions are situated in planes parallel to (010). They are connected by the eight-coordinated K(+) ions into a three-dimensional structure. An intricate O-H⋯F hydrogen-bonding network consolidates the structure.
