September 2000 issue
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.
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.
addenda and errata
A full description for the structure of bis(O-isopropyldithiocarbonato)cadmium(II) is presented
electronic papers (inorganic compounds)
electronic papers (metal-organic compounds)
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.
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.
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.
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.
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.
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.
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.
The structure of the title compound was redetermined and the correct C2/c space group was assumed instead of the previously reported P space group. The two independent molecules reported for the triclinic cell are actually related by a twofold axis.
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.
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.
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.
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)
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.