metal-organic compounds
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In the title salt, [(CH3)2NH2][Cu(HSO4)(SO4)(H2O)4], one type of cation and anion is present in the asymmetric unit. The CuII atom in the complex anion, [Cu(HSO4)(SO4)(H2O)4]−, has a tetragonal bipyramidal [4 + 2] coordination caused by a Jahn–Teller distortion, with the aqua ligands in equatorial and two O atoms of tetrahedral HSO4 and SO4 units in apical positions. Both types of ions form sheets parallel to (010). The interconnection within and between the sheets is reinforced by O—HO and N—HO hydrogen bonds, respectively, involving the water molecules, the two types of sulfate anions and the ammonium groups.
organic compounds
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In the title molecular salt, [NH2(CH2CH3)2][H2PO4], two unique types of cations and anions, which are configurationally very similar, are present in the asymmetric unit. Both ions form sheets approximately parallel to (-1-1) linked by weak hydrogen bonds. The interconnection within and between the sheets is reinforced by O—HO and N—HO hydrogen bonds involving the tetrahedral H2PO4 anions and the ammonium groups.
research communications
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The PrIII cation is surrounded ninefold by five sulfate groups (two monodentate and three chelating) and by one water molecule. The [Pr(SO4)5(H2O)] groups are arranged in sheets parallel to (010); two crystal water molecules and two ethylenediammonium cations connect the sheets via O—HO and N—HO hydrogen bonds into a three-dimensional framework structure.
research communications
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In the salt bis(dimethylammonium) hexaaquanickelate(II) bis(sulfate) dihydrate, the NiII cation is located on a centre of inversion and exhibits a slightly distorted octahedral arrangement of water molecules. The noncoordinating water molecules and dimethylammonium cations connect the sulfate and [Ni(H2O)6]2+ octahedra via O—HO and N—HO hydrogen bonds into a three-dimensional framework.