In the title compound, C(6)H(16)N(4)O(4)·4H(2)O, the tetra-zinane mol-ecule lies across an inversion centre. The tetra-zinane ring adopts a chair conformation, and all imino H atoms occupy axial positions. In the crystal, adjacent mol-ecules are linked through O-H⋯O, O-H⋯N and N-H⋯O hydrogen bonds with water mol-ecules generating a three-dimensional network.

The title compound, Eu(11)Zn(6)As(12), crystallizes with the Sr(11)Cd(6)Sb(12) structure type (Pearson's symbol mC58). The complex monoclinic structure of the first arsenide to form with this type features chains made of corner-sharing ZnAs(4) tetra-hedra, separated by Eu atoms. There are a total of 15 unique positions in the asymmetric unit. Except for one Eu atom with site symmetry 2/m, all a...

Increased S100B in Cerebrospinal Fluid of Infants with Bacterial Meningitis: Relationship to Brain Damage and Routine Cerebrospinal Fluid Findings, Diego Gazzolo, Dariusz Grutzfeld, Fabrizio Michetti, Amelia Toesca, Mario Lituania, Matteo Bruschettini, Anna Dobrzanska, and Pierluigi Bruschettini ( Department of Pediatrics and Obstetrics and Gynecology, Giannina Gaslini Children’s University Hos...

In the title compound, (C9H8N)2[ZnCl4]·2H2O, the tetra-chlorido-zincate ion is located on a twofold rotation axis with the Zn atom on a special position. The crystal packing is stabilized by N-H⋯O and O-H⋯Cl inter-actions.

The title manganese(II) substituted gallophosphate, K(0.5)Rb(0.5)[Ga(2)Mn(PO(4))(3)(H(2)O)(2)], features a three-dimensional network built of PO(4) tetra-hedra, GaO(5) trigonal bipyramids and MnO(6) octa-hedra. The Rb(I) and K(I) ions, which are disordered with respect to each other in a 1:1 ratio, occupy sites within the channels of the framework. The Rb(I)/K(I) and Mn(II) atoms occupy positio...

In the title compound, C(8)H(8)N(4), the dihedral angle between the tetra-zole and benzene rings is 21.6 (1)°. An inter-molecular C-H⋯π inter-action is observed.

The crystal structure of the title compound, (C(12)H(30)N(2))[CoCl(4)], is composed of discrete (C(12)H(30)N(2))(2+) cations and [CoCl(4)](2-) anions. The asymmetric unit contains a half-cation and a half-anion. The atoms of the cation occupy general positions about an inversion centre, which is located at the midpoint of the central C-C bond. The Co atoms lie on a twofold rotation axis. The sl...

This article is based on five lectures the author gave during the summer school, Interactions between Homotopy Theory and Algebra, from July 26–August 6, 2004, held at the University of Chicago, organized by Lucho Avramov, Dan Christensen, Bill Dwyer, Mike Mandell, and Brooke Shipley. These notes introduce basic concepts concerning local cohomology, and use them to build a proof of a theorem Gr...

The title compound, [Cu(C(16)H(32)N(4))](C(14)H(14)O(2)PS(2))(2) or [Cu(trans[14]dien)][S(2)P(OC(6)H(4)Me-4)(2)](2), where trans[14]dien is meso-5,7,7,12,14,14-hexa-methyl-1,4,8,11-tetra-azacyclo-tetra-deca-4,11-diene, was obtained by the reaction of [Cu(trans[14]dien)](ClO(4))(2) and [(C(2)H(5))(2)NH](2) [S(2)P(OC(6)H(4)Me-4)(2)](2). The Cu(II) atom lies on a centre of inversion and possesses ...