The title compound, [Co(C(2)N(3))(2)(C(3)H(7)NO)(2)](n), is a triclinic polymorph of the previously reported monoclinic structure [Tong et al. (2003 ▶). Acta Cryst. E59, m405-m407]. The Co(II) ion lies on an inversion centre and adopts an almost regular octa-hedral N(4)O(2) coordination geometry. Adjacent Co(II) atoms are connected by two bridging dicyanamide ligands, resulting in the formation...

Ce4B14O27 was synthesized under conditions of 2.6 GPa and 750 °C in a Walker-type multianvil apparatus. The crystal structure was determined on the basis of single-crystal X-ray diffraction data, collected at room temperature, revealing that Ce4B14O27 is isotypic to La4B14O27. Ce4B14O27 crystallizes monoclinically with four formula units in the space group C2/c (No. 15) and the lattice paramete...

In the title compound, [Cd(C(6)H(5)N(2)O(2))(2)(H(2)O)(2)], the Cd(II) ion is coordinated in a severely distorted octa-hedral geometry. The N atoms are cis to each other, while the water O atoms and ligand O atoms are mutually trans. The crystal structure is stabilized by a network of O-H⋯O, O-H⋯N and C-H⋯O hydrogen bonds and π-π stacking inter-actions [centroid-centroid distances = 3.730 (3) a...

Single crystals of the title compound, Pb(2)CrF(7), were obtained by solid-state reaction. The monoclinic structure is isotypic with Pb(2)RhF(7) and is built up of CrF(6) (3-) octa-hedra isolated from each other, inserted in a fluorite-related matrix of PbF(6) distorted octa-hedra, and PbF(8) square anti-prisms sharing edges and corners. The seventh F atom is 'independent', connected only to th...

Dicaesium bis-muth(III) phosphate(V) tungstate(VI), Cs(2)Bi(PO(4))(WO(4)), has been synthesized during complex investigation in a molten pseudo-quaternary Cs(2)O-Bi(2)O(3)-P(2)O(5)-WO(3) system. It is isotypic with K(2)Bi(PO(4))(WO(4)). The three-dimensional framework is built up from [Bi(PO(4))(WO(4))] nets, which are organized by adhesion of [BiPO(4)] layers and [WO(4)] tetra-hedra above and ...

In the title hydrated mol-ecular salt, (C(7)H(7)N(2)S)(2)[Zn(C(8)H(8)O(5))(2)]·6H(2)O, which is isotypic with its Mn(II), Co(II) and Ni(II) analogues, the Zn(2+) ion lies on a crystallographic inversion centre and a distorted ZnO(6) octa-hedral coordination geometry arises from the two doubly deprotonated O,O',O''-tridentate ligands. In the crystal, the components are linked by N-H⋯O(a), N-H⋯O(...

The descent set of an oscillating (or up-down) tableau is introduced. This descent set plays the same role in the representation theory of the symplectic groups as the descent set of a standard tableau plays in the representation theory of the general linear groups. In particular, we show that the descent set is preserved by Sundaram's correspondence. This gives a direct combinatorial interpret...

background and objective: celiac disease is an autoimmune disorder, characterized by inflammation, villous atrophy, and crypt hyperplasia of the small bowel mucosa. in this study we considered and compared sensitivity and specificity of serological tests in patients with celiac disease. materials and methods: in this cross-sectional study we prospectively recruited children with suspected celia...

abstract background and objective: helicobacterpylori(hp) is the most common bacterial infection in the world and it may be associated with chronic gastritis, pepticulcer disease, and gastricadenocarcinoma. the aim of this study was to determine the prevalence of hp in student of golestan university of medical sciences (goums). material and methods: this cross-sectional study was conducted on s...