Broadening the scope of Acta Crystallographica Section C

Editorial

The inter­penetrated three-dimensional framework of a new mixed lithium/ammonium perchlorate grown in a gel medium

A sample of Li_0.41(NH₄)_0.59ClO₄ was prepared by gel diffusion using agar agar gel as the medium of growth at ambient temperature. The Cl and mixed Li/N atoms are located on special positions. The structure features a twofold inter­penetrated three-dimensional entanglement architecture, in which single three-dimensional networks are constructed from tetra­hedral coordination based on diamondoid arrays. The crystal structure is compared with those of related compounds.

K and Ba distribution in the structures of the clathrate compounds K_xBa_16−x(Ga,Sn)₁₃₆ (x = 0.8, 4.4, and 12.9) and K_xBa_8−x(Ga,Sn)₄₆ (x = 0.3)

Four clathrates with type-I and type-II structure are reported in the K–Ba–Ga–Sn system. For the type-I compound, all framework sites are occupied by a mixture of Ga and Sn atoms, with Ga showing a preference for Wyckoff site 6c. For the type-II structures, only the smaller (Ga,Sn)₂₄ penta­gonal dodeca­hedral cages are filled, while the (Ga,Sn)₂₈ hexa­kai­deca­hedral cages remain empty.

MgSO₄·11H₂O and MgCrO₄·11H₂O based on time-of-flight neutron single-crystal Laue data

The structure of magnesium sulfate undeca­hydrate and its hexa­valent chromium-bearing analogue are compared, elucidating details of the strain distribution through the hydrogen-bonded structure due to the substitution of a much larger oxyanion.

Fe₂(SO₄)₃·H₂SO₄·28H₂O, a low-temperature water-rich iron(III) sulfate

Analysis of the title compound, diiron(III) tris­ulfate–sulfuric acid–water (1/1/28), at 100 and 200 K reveals the structural features of an alum, (H₅O₂)Fe(SO₄)₂·12H₂O. The Fe(H₂O)₆ unit is located on a centre of inversion, while the H₅O₂⁺ cation is located about an inversion centre. The compound thus represents the first oxonium alum, although the unit cell is ortho­rhom­bic.

Monoclinic structure and non­stoichiometry of `KAlSiO₄-O1'

The crystal structure of KAlSiO₄-O1 was refined from single-crystal data, taking multiple twinning into account. Electron microprobe analysis confirmed that the compound is not stoichiometric.

A bromine analogue of picoplatin: a new substance from the group of platinum-based chemotherapeutics

Polymorphism of mer-μ-oxalato-bis­[chloridotri­pyridine­cobalt(II)] pyridine disolvate

A one-dimensional coordination polymer of 5-[(imidazol-1-yl)methyl]benzene-1,3-dicarb­oxy­lic acid with Cu^II cations

Bis[μ-2-({2-[2-(2-chloro­phen­oxy)-1-oxidoeth­ylidene]hydrazinyl­idene}meth­yl)phenolato]bis­[pyridine­copper(II)] methanol disolvate

Tetra­aqua­(4,4′-di­methyl-2,2′-bi­pyridine-κ²N,N′)nickel(II) sulfate monohydrate: a simple molecule with an extremely complex hydrogen-bonding scheme

A one-dimensional silver(I) coordination polymer based on the 2-[2-(pyridin-4-yl)-1H-benzimidazol-1-ylmethyl]phenol ligand exhibiting photoluminescence

A fourfold inter­penetrating diamondoid three-dimensional coordination polymer: poly[[[μ₂-1,2-bis­(pyridin-4-yl)ethene-κ²N:N′](μ₂-5-hy­droxy­isophthalato-κ²O¹:O³)zinc(II)] 1,2-bis­(pyridin-4-yl)ethene hemisolvate]

Two complexes derived from the reaction of M₃(CO)₁₂ clusters (M = Ru, Os) with the 9-(tri­phenyl­phosphonio)­fluoren­ide ylide: tri­carbonyl[9-(tri­phenyl­phosphonio)fluorenyl­idene]­ruthenium and nona­carbonyl-μ₃-fluorenyl­idene-μ₂-hydrido-triangulo-triosmium(III)

Three isomorphous two-dimensional coordination polymers generated from a benzimidazole bridging ligand and ZnX₂ (X = Cl, Br and I)

A dinuclear zinc complex containing a diamond-core geometry: [Zn₂(μ₂-GueO)₂(GueO)₂(py)₂]·0.5(toluene) (GueOH is guethol)

Analogy to a Chinese knot in an ion-pair copper(II)–neodymium(III) complex based on a hexa­dentate Schiff base condensation product of 5-bromo­salicyl­aldehyde and glycyl­glycine

catena-Poly[1,4-dihy­droxy-1,4-di­azoniabi­cyclo­[2.2.2]octane [aqua­tri-μ-chlorido-tri­chloridodicuprate(II)]]

(4,6-Di­methyl-2-sulfanylidenepyrimidin-1-ium) tri­chlorido(thio­urea-κS)zinc(II)

Understanding the microcrystal tests of three related phenethyl­amines: the ortho-metallated (±)-amphetamine formed with gold(III) chloride, and the tetra­chloridoaurate(III) salts of (+)-methamphetamine and (±)-ephedrine

Two novel lead(II) complexes of 2-(hy­droxy­meth­yl)pyridine: a threefold diamondoid supra­molecular network based on Pb₄O₄ cores and a two-dimensional (4,4) network based on Pb₂O₂ units

The bis­(ethyl­enedi­thio)­tetra­thia­fulvalene-based ionic charge-transfer complex with 2,3-di­chloro-5,6-di­cyano-p-benzo­quinone

The structure of the 1H-imidazol-3-ium lawsonate salt aided by ab initio gas-phase calculations

Similarities and differences in the structures of 5-bromo-6-hy­droxy-7,8-di­methyl­chroman-2-one and 6-hy­droxy-7,8-di­methyl-5-nitro­chroman-2-one

Isomorphous methyl- and chloro-substituted small heterocyclic analogues obeying the chlorine–methyl (Cl–Me) exchange rule

Betaine 0.77-perhydrate 0.23-hydrate and common structural motifs in crystals of amino acid perhydrates

Supra­molecular synthesis based on piperidone derivatives and pharmaceutically acceptable co-formers

Frovatriptan salts of aliphatic carb­oxy­lic acids

5,5-Di­methyl-2,8-di­phenyl-5H-dibenzo[b,f]silepine: a synchrotron study

Di(phenyl­propyl­amino)­gossypol: a derivative of the dimeric natural product gossypol

Hydrogen-bonded and π-inter­action assembly in two 8-alk­oxy­carbonyl-1,8-di­aza­bicyclo­[5.4.0]undec-7-enium chloride salts

A hydrogen-bonded tetra­mer in (2RS,4SR)-7-bromo-2-(2-methyl­phen­yl)-2,3,4,5-tetra­hydro-1H-naphtho[1,2-b]azepin-4-ol and a three-dimensional hydrogen-bonded framework in (2RS,4SR)-2-(3-methyl­thio­phen-2-yl)-2,3,4,5-tetra­hydro-1H-naphtho[1,2-b]azepin-4-ol

Two new XP(O)[NHC(CH₃)₃]₂ phos­phor­amidates, with X = (CH₃)₂N and [(CH₃)₃CNH]₂P(O)(O). Corrigendum

Corrigendum to Acta Cryst. (2012), C68, o164–o169.

(E)-3-(Benzo[b]thio­phen-2-yl)-2-(3,4,5-tri­meth­oxy­phen­yl)acrylo­nitrile and (Z)-3-(benzo[b]thio­phen-2-yl)-2-(3,4-di­meth­oxy­phen­yl)acrylo­nitrile. Corrigendum

Corrigendum to Acta Cryst. (2007), C63, o743–o745.