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Provides a corrected reprint to an article previously published in the February, 2003 issue of 'Acta Crystallographica' periodical.

The article presents a paper about gem-dimethylcyclopropanation of dibenzylideneacetone (dba) using triisopropyl sulfoxonium tetrafluoroborate. It mentions the interesting behaviour shown by the packing of the molecules within the crystal structure. A view of an asymmetric unit of compound (IV), showing the atom-numbering scheme is provided.

The article presents a paper about three-dimensional networks in the 1:2 organic salts 2,2'-biimidazolium bis(3-carboxy-4-hydroxybenzenesulfonate) and 2,2'-bibenzimidazolium bis(3-carboxy-4-hydroxybenzenesulfonate) trihydrate. According to the article, the cation of compound (I) lies on a centre of inversion. It says that the ionic components in the packing structures of the title compounds are linked into three-dimensional networks by a combination of N, H and O hydrogen bonds.

The article presents a paper about {[SmCl(en)4][In2Te4]}n, an indium telluride with a one-dimensional sinusoidal chain. It mentions the presence or absence of N-H...Cl hydrogen bonding which affects the conformation of the anion. A figure that presents views of the cation and the anion of (I), showing the atom-numbering schemes, is provided.

The article presents a paper about bis[2-(2-hydroxyethyl)pyridinium]µ-decavanadato-bis[pentaaqua-manganate(II)] tetrahydrate. It mentions the role of decavanadate ions as building blocks for supra-molecular assemblies and ligands. A figure showing a view along the a axis of the hydrogen-bonded anionic layers is provided.

The crystal structure of the polymeric title complex, [CuCl2(C3H6N4)] n, has been solved from laboratory X-ray powder diffraction data collected at room temperature. The structural model obtained was refined with the Rietveld method using geometric soft restraints. There are two Cu atoms, two Cl atoms and one 1,5-dimethyl­tetra­zole ligand in the asymmetric unit. Both Cu atoms lie on inversion centres and adopt essentially elongated octa­hedral coordination. Within the octa­hedra, the elongated axial positions are occupied by Cl atoms, while two Cl and two N atoms (N3 and N4 of the tetra­zole ring) are in equatorial sites. Each Cl atom forms an asymmetric bridge between neighbouring Cu atoms, which are also bridged via the N3—N4 bond of the tetra­zole ring. These bridges result in the formation of polymeric chains, running along the a axis, with weak C—H⋯Cl hydrogen bonds crosslinking the chains. [ABSTRACT FROM AUTHOR]

The room-temperature crystal structure of 5-butyl-5-ethylbarbituric acid (generally known as butobarbitone), C10H16- N2O3, was reported in space group C2/c [Bideau (1971). C. R. Acad. Sci. Paris Ser. C, 272, 757–760]. A redetermination at 120 K using synchrotron radiation shows the space group at this temperature to be P21/n and not C2/c. There are two crystallographically independent molecules in the asymmetric unit, but no solvent. Reported issues concerning possible disorder of the molecule are addressed; the butyl substituent of one of the molecules adopts an unusual conformation in being not fully extended. A subsequent re-collection at room temperature shows that the space group is indeed C2/c (A2/a with the axes selected in this report), and so the crystal structure undergoes a phase change upon cooling to 120 K. [ABSTRACT FROM AUTHOR]

The title compound, [Cd(C6H4NO2)2(H2O)2]n, forms a one-dimensional chain structure based on a Cd atom with approximate pentagonal bipyramidal coordination geometry and two nicotinate ligands in different coordination modes. One acts as a tridentate ligand, chelating one Cd atom through the carboxylate group while simultaneously binding to a second symmetry-related Cd atom through the pyridine N atom; the other acts only as a bidentate ligand through its carboxylate group. Hydrogen bonds utilizing the coordinated water molecules, uncoordinated nitrogen and carboxylate O atoms as acceptors link the chains. [ABSTRACT FROM AUTHOR]

Examines the crystal structure of H[sub3]BO[sub3]-3T which is a new trigonal polytype of orthoboric acid. Forces that connects sheets of hydrogen-bonded B(OH)[sub3] molecules in the structure of orthoboric acid; Analysis of bond angles and bond distances in the compound; Arrangement of hydrogen-bonded B(OH)[sub3] molecules within a single pseudo-hexagonal sheet parallel to the (001) plane in H[sub3]BO[sub3]-3T.

Focuses on methyl 3-O-beta-L-fucopyranosyl alpha-D-glucopyranoside trihydrate. Hydrogen-bonding pattern; Crystallographic beta axis.

Analyzes the crystal structure of several complexes of barium. Temperature-dependent crystal cell parameters of 18-crown-6 complex with barium(II) phenolate derivatives; X-ray crystal structure determination of barium(I); Crown fragment of the neutral moiety.

Describes the structure of the {[Cu(C[sub 6]H[sub 5]O[sub 3]Cl(H[sub 2]O)].H[sub 2]O}[sub n]. Deformed square-pyramidal coordination geometry of the Cu[sup 11] atom; Formation of a polymeric chain by the Cu atoms that are bridged by Cl atoms; Creation of a five-membered chelate ring by the deprotonated hydroxyl and the ketone O atoms of the maltolate ligand.

Discusses the crystallization of the compound, [Dy[sub 2](C[sub 2]H[sub 3]O[2])[sub 6](H[sub 2]O)[sub 4].4H[sub 2]O, in the form of dimeric units related by an inversion center. Nine-coordinate structure of each cation and its binding to two water molecules and three acetate groups; Action of one acetate group as a bridge between neighboring metal atoms.

The asymmetric unit of the title compound, [PtCl2(C5H11NO2S)], a d-me­thionine derivative, contains two mol­ecules with opposite chirality at the S atoms. The amino acid acts as a bidentate ligand and coordinates simultaneously through the N (amino) and S (thio­ether) atoms. The mol­ecules are packed in pairs which are connected through two hydrogen bonds between the protonated carboxyl groups, with O⋯O distances of 2.633 (10) and 2.663 (12) Å. [ABSTRACT FROM AUTHOR]

In 3-methyl­thio-4-(propargyl­thio)­quinolinium chloride monohydrate, C13H12NS2+·Cl−·H2O, and 3-methyl­thio-4-(propargyl­thio)­quinolinium tri­chloro­acetate, C13H12­NS2+·­C2Cl3O2−, the terminal alkyne group forms C[triple-bond]C-H⃛O hydrogen bonds of favourable geometry. The conformation of the flexible propargyl­thio group is different in the two structures. [ABSTRACT FROM AUTHOR]