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metal-organic compounds
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In the centrosymmetric title compound, [Co(C4H11N2)2(H2O)4](SO4)2·2H2O, the CoII atom is coordinated in a distorted octahedral geometry by four water O atoms and two piperazinium N atoms. These four water O atoms define an equatorial plane with a maximum deviation of 0.0384 (1) Å while the two piperazinium N atoms complete the octahedron in the axial positions. Neighboring complex molecules and sulfate anions are connected through an extensive network of N—H
O and O—HO hydrogen bonds, which link the different chemical species into layers in the ab plane. Additional Owater—HO hydrogen bonds involving the non-coordinating water molecules and C—HO interactions connect these layers into a three-dimensional supramolecular structure.
O and O—HO hydrogen bonds, which link the different chemical species into layers in the ab plane. Additional Owater—HO hydrogen bonds involving the non-coordinating water molecules and C—HO interactions connect these layers into a three-dimensional supramolecular structure.metal-organic compoundsOpen access
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In the title organic–inorganic hybrid compound, (C5H7N2)2[ReVW4O19]·7H2O, the Lindqvist-type polyoxido anion has crystallographically imposed mm2 symmetry and is built up by six MO6 (M = W, V, Re) edge-sharing distorted octahedra. The Re and V atoms share the same crystallographic site in a 0.5:0.5 ratio. The 4-aminopyridinium cations lie on a mirror plane. Three of the four independent water O atoms in the asymmetric unit are located on a mirror plane whereas the remaining O atom has mm2 site symmetry. In the crystal, the cations, anions and water molecules are linked into a three-dimensional network through O—HO and N—HO hydrogen-bonding interactions.
O and N—HO hydrogen-bonding interactions.
