issue contents

Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296

September 2000 issue

Highlighted illustration

Cover illustration: A perspective view of the molecular packing in catena-poly[[silver(I)-[mu]-[(E)-1,2-bis(2-pyridyl)ethylene-N:N']] nitrate]. See Tong & Chen [Acta Cryst. (2000), C56, 1075-1076].

inorganic compounds


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Sr3Ga3(BO3)4O(OH) represents a new ortho-borate structure type containing the uncommon square-pyramidal GaO4OH unit.

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The title compound is composed of one-dimensional [Ti3Te113−] chains built by face-sharing pentagonal TiTe7 bipyramids and distorted TiTe6 octahedra. These chains adopt hexagonal closest packing along the [101] direction. Rb atoms are located among these chains.

metal-organic compounds






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The structure of the title compound, obtained solvothermally at 473 K, has been determined by single-crystal X-ray diffraction. It consists of one-dimensional [AlP2O8H]2− macroanions, connected to each other by pentane­di­ammonium cations.








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A new three-dimensional open-framework germanate was hydro­thermally synthesized and its structure determined by single-crystal X-ray diffraction. The framework is built of [Ge9O22(OH)4] units and contains intersecting channels in three directions formed by an eight- and two ten-membered rings.





organic compounds


























addenda and errata


Acta Cryst. (2000). C56, 1176
doi: 10.1107/S0108270100005771
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A full description for the structure of bis(O-iso­propyl­di­thio­carbonato)­cadmium(II) is presented

electronic papers (inorganic compounds)


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The new caesium tantalum chalcogenide Cs6Ta4S22 was prepared from the reaction of Cs2S3, Ta and S. The compound is isotypic with Rb6Ta4S22 and A6Nb4S22 (A = Rb, Cs), and consists of discrete [Ta4S22]6− anions and Cs+ cations.

electronic papers (metal-organic compounds)


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The title binuclear nickel(II) complex has a slightly distorted octahedral coordination. The pyridazine and two methyl­pyridine rings of the bridging tetradentate ligand are coplanar to within 0.181 (3) Å.

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In the title compound, the Ni atom is bonded centrosymmetrically by four N and two O atoms in a distorted octahedral coordination. The acetate ligands form intermolecular hydrogen bonds to imidazole moieties, giving rise to a two-dimensional layer structure.

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The Cu atom in the title complex has an N4O2 octahedral coordination geometry, the Cu atoms being bridged by the bi­pyridine and chelated by the phenanthroline heterocycles. Adjacent mol­ecules are linked into a zigzag chain running along the c axis of the monoclinic unit cell. The chains are connected through lattice water mol­ecules to produce a layer structure.

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In the title complex, the Zn atom is located at a center of symmetry and has a distorted octahedral geometry, with Zn—O distances in the range 2.052 (2)–2.181 (2) Å. Hydro­gen bonds involving the water mol­ecules make up a three-dimensional network.

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In the title crystals, (IIIa)> and (IIIb)>, respectively, the bonding parameters differ significantly. That also applies for the known structure of the corresponding di­chloro­methane solvate. Complex (IIIb)> has a crystallographic centre of symmetry.

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The title compound crystallizes as a linear polymeric compound with one pyrimidine ligand bridging between two CuII atoms and a second pyrimidine ligand coordinated in a monodentate manner. The coordination geometry around the CuII atom is a distorted octahedron including a long Cu⋯O bond.

Acta Cryst. (2000). C56, e382
doi: 10.1107/S0108270100011021
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The title compound is a monomeric trans-octahedral complex, with the SnIV atom at the centre of symmetry, planar 2-mercapto­pyridine zwitter­ions and SnS2C2 groups in twist–envelope conformations. The 2-mercapto­pyridine ligands are monodentate.

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The structure of the title compound was redetermined and the correct C2/c space group was assumed instead of the previously reported P\overline 1 space group. The two independent mol­ecules reported for the triclinic cell are actually related by a twofold axis.

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The structures of the two title compounds consist of discrete [CuCl4]2− anions with two monoprotonated C2N3H8+ cations for (I>) and a diprotonated C8N4H142+ cation for (II>). The [CuCl4]2− anions have flattened tetrahedral geometries.

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The title complex is the first crystal structure reported with di­methyl sulfoxide coordinated to CoIII. It crystallizes with two independent mol­ecules in the asymmetric unit. A localized non-crystallographic inversion centre is observed between the two cations.

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The imino ligand displays weak π-acceptor capabilities and, in contrast to Fischer-type carbene complexes, is not positioned on the bisecting line of the angle between two CO ligands.

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The cation of the title complex consists of an Ru atom in a pseudo-octahedral coordination environment, with two chelating 1,2-bis­(di­phenyl­phosphino)­ethane (dppe) ligands and one chelating acetate ligand. The hexa­fluoro­phosphate anion and methanol solvate mol­ecules are unexceptional.

electronic papers (organic compounds)


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The fused six- and five-membered rings adopt chair and twist conformations, respectively, in the title catanospermine derivative.

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In the title compound, the tropone ring is at an angle of 50.3 (1)° to the crown ether. The conformation of the ethereal moiety is S(g)C(g)C(t)O(t)C(g)C(t)O(t)C(g)C(t)O(t)C(g)C(g)S (t = trans, g = gauche). The CH2—O bonds are all trans, which is different to the case in the Hg complex of the title compound.

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The absolute configuration was determined for the title compound. The cation contains a 14-membered macrocyclic lactone and two sugars, namely cladinose and desos­amine. The six-membered rings of the sugars adopt chair conformations.

Acta Cryst. (2000). C56, e400
doi: 10.1107/S0108270100010519
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In the title compound, the dihedral angle between the two phenyl rings is 15.69 (6)°. An intermolecular hydrogen-bonding association exists between the hydroxy group and one of the azo N atoms.