metal-organic compounds
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In the title compound, (C5H7N2)2[Ni(H2O)6](SO4)2, the NiII cation is located on an inversion centre and is coordinated by six aqua ligands in a slightly distorted octahedral coordination environment. The [Ni(H2O)6]2+ ions are connected through an extensive network of O—HO hydrogen bonds to sulfate anions, leading to the formation of layers parallel to (001). The 4-aminopyridinium cations are located between these layers and are connected to the anionic framework by N—HO hydrogen bonds. Weak π–π interactions between the pyridine rings, with a centroid–centroid distance of 3.754 (9) Å, provide additional stability to the crystal packing.
organic compounds
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In the organic/inorganic salt hydrate, 6C7H9ClN+·P6O186−·2H2O, the cyclohexaphosphate anion resides on an inversion centre. The asymmetric unit consists of three cations, one half-anion and a water molecule. In the crystal, the water molecules and the [P6O18]6− anions are linked by O—HO hydrogen bonds, generating infinite layers parallel to the ab plane. These layers are interconnected by the organic cations through N—HO hydrogen bonds.
metal-organic compounds
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In the title molecular salt, (C3H12N2)[CrO4], each chromate anion accepts six N—HO and C—HO hydrogen bonds from nearby propane-1,2-diammonium cations. Three of the four O atoms of the chromate anion accept these bonds; the remaining Cr—O bond length is notably shorter than the others. In the crystal, the anions and cations stack in layers lying parallel to (100): the hydrogen-bonding pattern leads to a three-dimensional network.
metal-organic compounds
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In the title compound, (C8H12N)2[Co(H2P2O7)2(H2O)2], the Co2+ ion lies on a crystallographic inversion centre and adopts a slightly distorted octahedral CoO6 coordination geometry arising from two chelating diphosphate [H2P2O7]2− ligands and two trans water molecules. In the crystal, the components are linked by O—HO, N—HO and C—HO hydrogen bonds and weak aromatic π–π stacking [shortest centroid–centroid separation = 3.778 (2) Å] interactions. (001) layers of alternating organic cations and complex inorganic anions are apparent.
metal-organic compounds
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In the title hydrated salt, [Co(C12H8N2)3]2[PVW11O40]·2H2O, the complete Kegggin ion is generated by crystallographic inversion symmetry, which imposes statistical disorder on the O atoms of its central PO4 group. The V atom is statistically disordered over all the metal sites of the anion. In the cation, the Co2+ ion is coordinated by three bidentate 1,10-phenanthroline (phen) ligands, generating a distorted CoN6 octahedron. Possible very weak intramolecular C—Hπ interactions occur in the cation. In the crystal, the components are linked by O—HO and C—HO interactions, building a three-dimensional network featuring one-dimensional voids along the c-axis direction.
metal-organic compounds
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In the title molecular salt, (C10H16N2)[CoCl4], the piperazine ring of the phenylpiperazine dication adopts a chair conformation and the phenyl ring occupies an equatorial orientation. In the tetrachloridocobaltate(II) dianion, the Co—Cl bond lengths for the chloride ions not accepting hydrogen bonds are significantly shorter than those for the chloride ions accepting such bonds. In the crystal, the components are linked by N—HCl hydrogen bonds, generating [001] chains.
metal-organic compounds
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The title compound, (C8H12NO)2[Co(H2P2O7)2(H2O)2]·2H2O, crystallizes isotypically with its MnII analogue. It consists of alternating layers of organic cations and inorganic complex anions, extending parallel to (100). The complex cobaltate(II) anion exhibits -1 symmetry. Its Co2+ atom has an octahedral coordination sphere, defined by two water molecules in apical positions and two H2P2O72− ligands in equatorial positions. The cohesion between inorganic and organic layers is accomplished by a set of O—HO and N—HO hydrogen bonds involving the organic cation, the inorganic anion and the remaining lattice water molecules.
metal-organic compounds
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In the title complex, [Co(C6H15N2)Cl3], the Co2+ ion is coordinated in a distorted tetrahedral fashion by three chloride ions and one N atom of the piperazine ring; the ring adopts a chair conformation with the N—Co and N—CEt bonds in equatorial orientations. In the crystal, molecules are connected by N—HCl hydrogen bonds, generating (10-1) sheets.
metal-organic compounds
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In the title hydrate, (C4H12N2)[Co{B6O7(OH)6}2]·6H2O, both the dication and dianion are generated by crystallographic inversion symmetry. The Co2+ ion in the dianion adopts a fairly regular CoO6 octahedral coordination geometry arising from the two O,O′,O′′-tridentate ligands. In the crystal, the dianions and water molecules are linked by O—HO hydrogen bonds, generating a framework with large [100] channels, which are occupied by the organic dications. N—HO and C—HO hydrogen bonds consolidate the structure.
organic compounds
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In the title compound, C9H26N33+·3NO3−, the triprotonated 1,1,4,7,7-pentamethyldiethylenetriamine molecules are linked to the nitrate anions by multiple bifurcated N—H(O,O) and weak C—HO hydrogen bonds. The organic cation is characterized by N—C—C—N torsion angles of −176.2 (2) and 176.6 (2)°.
organic compounds
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In the crystal structure of the title compound, C5H14N22+·2HC2O4−, the two crystallographically independent hydrogen oxalate anions are linked by strong intermolecular O—HO hydrogen bonds, forming two independent corrugated chains parallel to the b axis. These chains are further connected by N—HO and C—HO hydrogen bonds originating from the organic cations, forming a three-dimensional network. The diprotonated piperazine ring adopts a chair conformation, with the methyl group occupying an equatorial position.
organic compounds
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In the crystal structure of the title compound, 4C5H6ClN2+·H2P6O184−, the [H2P6O18]4− anions are interconnected by O—HO hydrogen bonds, leading to the formation of infinite ribbons extending along the a-axis direction. These ribbons are linked to the organic cations, via N—HO and C—HO hydrogen bonds, into a three-dimensional network. The six P atoms of the [H2P6O18]4− anion form a chair conformation. The complete cyclohexaphosphate anion is generated by inversion symmetry.
organic compounds
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The asymmetric unit of the title salt, C8H14N22+·2NO3−, contains two independent dications and four independent nitrate anions. The crystal structure consists of discrete nitrate ions, three of which stack in layers parallel to (001) at z = 0 and 0.5. These layers are connected via m-xylylenediaminium dications. The fourth anion is sandwiched by the two independent organic cations in the asymmetric unit. In the crystal, the ions are connected by a large number of bifurcated and non-bifurcated N—HO(O) hydrogen bonds, forming sheets parallel to (100). These sheets are connected by C—HO hydrogen bonds, forming a three-dimensional network.