Sodium iodine(V) oxyfluoride, NaIO₂F₂

NaIO₂F₂ is a new type of iodine(V) oxyfluoride with full O/F ordering and stereochemical activity of the lone pair, E, of iodine(V). A comparison with both homologous tellurium(IV) phases and rutile is presented.

Ce₂₀Mg₁₉Zn₈₁: a new structure type with a giant cubic cell

Ce₂₀Mg₁₉Zn₈₁ is a new structure type for rare earth–transition metal–magnesium inter­metallic compounds, with a large cubic unit cell containing 480 atoms. Four different construction units following the geometric concept of nested polyhedral units are identified to simplify the structure.

The new penta­borate Na₃SrB₅O₁₀

The fundamental building unit for the title compound is the isolated anionic [B₅O₁₀]⁵⁻ group. The local mm2 point symmetry of the ideal B₅O₁₀ group is broken, as the terminal O atoms have a small deviation from the corresponding six-membered ring planes.

Two new types of oxyfluoro­tellur­ates(IV): ScTeO₃F and InTeO₃F

The crystal structures of the new phases ScTeO₃F and InTeO₃F belong to two different structural types that also differ from that of the recently published series MTeO₃F (M = Fe, Ga and Cr). A comparison is made of the three MTeO₃F types.

A new type of mixed anionic framework in microporous rubidium copper vanad­yl(V) phosphate, Rb₂Cu(VO₂)₂(PO₄)₂

Crystals of of Rb₂Cu(VO₂)₂(PO₄)₂ have a novel structure type with a porous mixed framework formed by Cu, V and P oxo complexes. VO₅ polyhedra in a trigonal bipyramidal configuration and PO₄ tetra­hedra share vertices to form eight-membered rings, which lie in layers perpendicular to the a axis of the monoclinic unit cell. Cu atoms at centres of symmetry have square-planar coordination and link these layers along [100] to form a three-dimensional anionic framework.

LiBaAlF₆ and the crystal chemistry of LiA^IIB^IIIF₆ phases

The structure of LiBaAlF₆ is reported. Correlations between cationic radii and formula volumes for the known members of the LiA^IIB^IIIF₆ family are developed that allow the prediction of crystal symmetry and space group based on the identities of the A and B cations.

A three-dimensional net of Δ-tris­(1,10-phenanthroline)ruthenium(II) in the dual-metal self-assembly of bis­[tris­(1,10-phenanthroline)ruthenium(II)] tetra­iso­thio­cyanato­iron(II) bis­(per­chlorate)

A di­hydroxido­tetra­copper(II) framework supported by 4,4′-(adamantane-1,3-diyl)bis­(1,2,4-triazole) and benzene-1,3,5-tri­carboxyl­ate bridges

Two novel mixed-ligand complexes containing organo­sulfonate ligands

Copper(II) bromide and copper(II) acetate complexes of 4,4′-(p-phenyl­ene)bipyridazine

Two isomorphous Zn^II/Co^II complexes with tri-tert-but­oxy­silane­thiol and histamine, and (4-hy­droxy­methyl-1H-imidazole-κN)bis­(tri-tert-but­oxy­silane­thiol­ato-κ²O,S)zinc(II)

The first coordination polymer of lanthanum(III) with a naphthalene-1,4,5,8-tetra­carboxylic 1,8-anhydride derivative

A novel cobalt(II) coordination polymer with an unusual four-connected 4².6³.8 topology

Hydrogen-bonding inter­actions in (3,4-di­meth­oxy­phen­yl)acetic acid monohydrate

Hydrogen-bonded sheets in 2-(2-amino­phen­yl)-1H-benzimidazol-3-ium di­hydrogen phosphate

Dynamic disorder in a penta­coordin­ate silicon complex with 2,2′-diazenediyldiphenol

2-[N-(2,3-Di­methyl­phen­yl)­carbam­oyl]benzene­sulfonamide and the 3,4- and 2,6-di­methyl­phenyl analogues

Conformational dimorphism of the spiro­pyran 1′,3′,3′-tri­methyl­spiro[2H-1-benzo­pyran-2,2′-indoline]-6-carbaldehyde)

2-Amino-4-chloro-6-[N-methyl-N-(4-methyl­phen­yl)amino]pyrimidine: formation versus fragmentation of hydrogen-bonded chains of edge-fused R₂²(8) rings in 4,6-disubstituted 2-amino­pyrimidines

Di­methyl 6-[1,2-bis­(meth­oxy­carbon­yl)-2-(tri­phenyl-λ⁵-phosphanyl­idene)­ethyl­idene­amino]-2-methyl­sulfanyl-3,4-pyridine­dicarboxyl­ate forms a chain of hydrogen-bonded rings

10-Ethyl-4-oxo-2,3,4,10-tetra­hydro­pyrimido[4,5-b]quinolin-2-iminium 4-toluene­sulfonate: a polarized electronic structure in the cation and a hydrogen-bonded sheet structure

(E)-3-Di­methyl­amino-2-(1H-indol-3-yl­carbon­yl)acrylo­nitrile: a chain of edge-fused rings built from a three-centre N—H⋯(N,O) hydrogen bond

N-(2-Bromo­ethyl)-4-piperidino-1,8-naphthalimide and N-(3-bromo­propyl)-4-piperidino-1,8-naphthal­imide

4,6-Dimeth­oxy-2-phthalimido­pyrimidine: sheets built from π-stacked hydrogen-bonded chains

Hydrogen bonding in 2-(2-oxo­thia­zolidin-3-yl)-4,5-di­hydro­thia­zolium hydrogen sulfate monohydrate

Low-temperature study of 3-acetyl­indole at 110 K

2-(3-Hy­droxy­prop­yl)isoindoline-1,3-dione: competition among hydrogen-bond acceptors

Favoured conformations of methyl iso­propyl, ethyl iso­propyl, methyl tert-butyl, and ethyl tert-butyl 2-(tri­phenyl­phospho­ranyl­idene)malonate