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inorganic compounds
The quaternary vanadium thiophosphate CsVP2S7 (caesium vanadium diphosphorus heptasulfide) was synthesized by reacting a mixture of Cs2S3, V, P4S3 and S. The crystal structure is composed of VS6 octahedra, which are linked by bitetrahedral [P2S7] groups to form two-dimensional anionic [VP2S7]- layers. The layers are stacked perpendicular to the crystallographic c axis and are separated by the Cs+ ions. The VS6 octahedra, the [P2S7] groups and the Cs+ ions are located in special positions. CsVP2S7 is isostructural to KVP2S7 and RbVP2S7.
inorganic compounds
The quaternary tantalum thiophosphate K4Ta4P4S24 (tetrapotassium tetratantalum tetraphosphorus tetracosasulfide) was obtained by reacting elemental Ta with a melt formed in situ of K2S3, P2S5 and S. The crystal structure exhibits [Ta4P4S24]4- anionic layers, which consist of dimeric Ta2S11 units interconnected by PS4 tetrahedra. The layers are stacked in an ABAB sequence in the direction of the crystallographic a axis and are separated by the K+ ions. The title compound is isostructural with A4Ta4P4S24 (A = Rb and Cs).
inorganic compounds
The reaction of K2S3, Nb, Ta and S yields single crystals of non-stoichiometric tetrapotassium niobium tantalum undecasulfide, K4Nb0.96Ta1.04S11. The compound is isotypic with K4Nb2S11 and the orthorhombic modification of K4Ta2S11. The structure consists of discrete K+ cations and complex [M2S11]4- (M = Nb and Ta) anions, in which the Nb and Ta atoms occupy the same Wyckoff positions statistically. Both M atoms are sevenfold coordinated by S22- and S2- anions. The coordination polyhedra can be described as distorted pentagonal bipyramids. Two such bipyramids share a common face, thus forming the [M2S11]4- anion.
metal-organic compounds
In the structure of the title compound, [CuNa2(C2H3O2)2(N3)2]n, the copper(II) cation is coordinated by two N atoms of two symmetry-related azide anions and two O atoms of two symmetry-related carboxylate anions within a distorted tetragonal plane. The sodium cation is surrounded by four O atoms of four symmetry-equivalent carboxylate anions and two N atoms of two azide anions within an irregular polyhedron. The copper(II) cations are located on a twofold axis, whereas all other atoms are located in general positions. The copper(II) and sodium cations are connected via the carboxylate anions into sheets parallel to (010). These sheets are linked by the azide anions via μ-N,N coordination into a three-dimensional coordination network.
metal-organic compounds
In the crystal structure of the title compound, [FeNa(N3)4(C10H8N2)2]n, the Fe and Na atoms are coordinated by four N atoms of azide anions and two N atoms of 4,4′-bipyridine ligands within distorted octahedra. The azide anions are located in general positions whereas the Fe and Na atoms, as well as the 4,4′-bipyridine ligands, are located on twofold axes. The iron and the sodium cations are connected via the 4,4′-bipyridine ligands into chains, which are linked by the azide anions into a three-dimensional coordination network.
metal-organic compounds
In the crystal structure of the title compound, [Cu(NCS)(C4H3IN2)]n, each Cu atom is coordinated by three thiocyanate anions and one 2-iodopyrazine ligand within a distorted tetrahedron. The Cu-coordinated units form dimers, which are connected into layers by the thiocyanate anions.
metal-organic compounds
In the crystal structure of the title compound, [Cu(C6H14N2O)2](BF4)2, the Cu atom is coordinated by four N atoms of two symmetry-related N-(2-aminoethyl)morpholine ligands in a slightly distorted square-planar geometry. Including two longer contacts to two F atoms of two symmetry-related tetrafluoroborate anions, the coordination polyhedron can be described as a tetragonal bipyramid. The Cu atom is located on a centre of inversion, whereas the N-(2-aminoethyl)morpholine ligand and the tetrafluoroborate anion are located in general positions. The crystal packing is stabilized by N—H
F and N—HO hydrogen bonds.
F and N—HO hydrogen bonds. metal-organic compounds
The crystal structure of the title compound, (C2H10N2)(C2H9N2)2[Sn2S6], consists of discrete [Sn2S6]4− anions and mono- as well as diprotonated ethylenediamine molecules. The anion and the monoprotonated cation occupy general positions, whereas the dications are located on centres of inversion. In the crystal structure, the anions and cations are connected via N—HS and N—HN hydrogen bonds.
S and N—HN hydrogen bonds.metal-organic compounds
The structure of the title complex, (C4N2H14)[MoS4], consists of tetrahedral tetrathiomolybdate dianions connected to butane-1,4-diammonium dications, (1,4-bnH2)2+, via hydrogen bonding. The compound contains two crystallographically independent butane-1,4-diammonium dications in the asymmetric unit, both of which are located around centres of inversion. The anions are located in general positions.
organic compounds
In the crystal structure of the title compound, C21H21PS3, two crystallographically independent molecules are found. One of these molecules is located in a general position, whereas the P atom of the second molecule is located on a threefold rotation axis.
