A cylindrical macrocycle with two di­aza-18-crown-6 macrocycles encapsulating two silver cations

In the crystals of μ-[N:N^';N:N^'-bis(2-chloro-1,3-xylyl)bis(di-aza-18-crown-6)]disilver(I) bis(trifluoromethanesulfonate), each Ag^I ion is coordinated primarily by two N atoms in an almost linear fashion and further coordinated by four weaker contacts to the O atoms of the diaza-18-crown-6 unit.

Tri­carbonyl[(2,3,6,7-η)-2,3-di­methylene-2,3-di­hydro­furan]iron(0) at 120K

The Fe atom is coordinated to the exocyclic double bonds of the organic ligand and the carbonyl groups in a pentagonal fashion, with the carbonyl groups in a piano-chair conformation. The Fe—C distances correspond generally to those of the butadiene analogue [Mills & Robinson (1963). Acta Cryst. 16, 758–761].

Di-μ-hydroxo-tris­(tri­methyltin) iodide at 100K

The space group revision of the title compound [Marsh (1997). Acta Cryst. B53, 317–322] is confirmed. The structure is properly described in I4c2 with Z' = 1/2 rather than in Cc with Z' = 2.

The relative configuration of a stereoisomer of 1,2,5,6,9,10-hexa­chloro­decane

The crystal structure of (2SR,5RR,6RR,9SR)-1,2,5,6,9,10-hexachlorodecane, prepared by chlorine addition to the double bonds of 1,5,9-decatriene, is presented. The molecule has C₂ symmetry.

m-Azido­benzene­sulfonyl chloride

The title compound is used as a raw material for the esterification of aliphatic and aromatic mono- and polyfunctional alcohols. Mono-, di- and triazido compounds, which are applied, for example, in the process of lithographic structuring of polymers, are prepared in the same way.

6,7-Di­methyltri­cyclo[3.2.2.0]non-6-ene at 120 K, a [3.2.2]propellane derivative

The title compound belongs to the group of [3.2.2]propellanes. The bond angles inside the cyclobutane and cyclobutene units involving the C1 and C2 atoms of the central bridge are less than 90°.

8-Hydroxycedran-9-one

The title compound is found to exist as a dimer in the solid state due to a hydrogen bond between the hydroxy group of one molecule and the carbonyl group of another.

1,3,4,6-Tetra­thia­pentalene-5-spiro-2'-indan-2,1',3'-trione and its 2-thione analogue

The molecular structures of the title compounds are similar to each other and suggest almost no electron transfer from the dithiacyclopentene-2-thione or 2-one group to the indandione group.

A nimesulide intermediate

The two phenyl rings make a dihedral angle of 73.5(1)°, indicating the non-planarity of the molecule. The orientation of the methanesulfonanilide moiety with respect to the phenyl ring is given by the C—S—N—C torsion angle of -69.2(2)°. Molecules are linked into pairs by N—H⋯O hydrogen bonding over an inversion centre.

Editorial

Ba₄Ti₁₂O₂₇: Rietveld refinement using X-ray powder diffraction data

The Rietveld refinement of a barium titanate, Ba₄Ti₁₂O₂₇, which is isostructural with Ba₄Al₂Ti₁₀O₂₇ and Ba₄ZnTi₁₁O₂₇, is reported. The structure is rather compact, with narrow channels along the b axis.

Calcium pyroborate, Ca₂B₂O₅

Stacked double chains containing Ca1O₇ and Ca2O₆ polyhedra are linked to form a three-dimensional framework by B₂O₅ groups.

The double-anion salts M₃[ZnCl₄]NO₃ (M = K⁺ and NH₄⁺)

The isomorphous title compounds are newly discovered double-anion salts containing ZnCl₄^2– and NO₃^– ions. The structure consists of rows of nitrate ions parallel to a, surrounded by cylinders of cations, which in turn are surrounded by concentric cylinders of tetrachlorozincate ions.

Na₂Mg(SO₄)₂.4H₂O, the Mg end-member of the bloedite-type of mineral

The bloedite-type title compound consists of parallel layers built up of MgO₂(H₂O)₄ and NaO₄(H₂O)₂ octahedra. Layers are interconnected through SO₄ tetrahedra and hydrogen bonds.

Cobalt(II) tris­odium hexamolybdoperiodate tetradecahydrate

In the title salt, the anion has the Anderson structure with crystallographic 3m symmetry. The unique cation site is occupied by disordered Na⁺ and Co²⁺ ions. The anions form layers perpendicular to the c axis which are separated by double layers of cations.

Potassium tetra­bromoaurate(III)

The single-crystal structure determination of potassium tetrabromoaurate(III), KAuBr₄, in the centrosymmetric space group P2₁/c is reported. The AuBr₄^– anions are nearly square planar.

A powder diffraction study of BaCaGa₄O₈

A powder diffraction study of BaCaGa₄O₈ reveals that GaO₄ tetrahedra are arranged in a derivative structure of tridymite. The type of arrangement of GaO₄ tetrahedra has not been found previously among compounds with the stuffed tridymite structure.

BaNb_4-xTi_xO₆ (x = 0.53)

BaNb_4-xTi_xO₆ is isostructural with BaNb₄O₆, i.e. it contains alternating NbO and perovskite-type single slabs. The NbO slabs can also be described as layers of Nb₆O₁₂ clusters, condensed via corner sharing among the Nb₆ octahedra.

An adduct of aquadi­chlorodi­phenyltin(IV) and 4,4,8,8-tetra­kis­(1-pyrazolyl)pyrazabole

Bis(3,5-di­methylpyrazole-N²)bis­(thio­cyanato-N)cobalt(II) monohydrate

Bis(tri­ethanolamine)strontium(II) bis­(2,4-di­nitrophenolate)

(2,5,8,11,14-Pentaoxa­penta­decane-κ⁵O)bis­(2,4,6-tri­nitrophenolato-O¹,O²)calcium(II)

The [Ru₃(CO)₁₁]^2- dianion

[PPh₄]₂[Pd{Se₂C₂(COOCH₃)₂}₂]

trans-Di­chloro(hemiporphyrazinato)tin(IV)

1,1'-Di­iodo-3,3'-bis­(tri­methylsilyl)ferrocene

Hexa­aquametal(II) 4-styrene­sulfonates of manganese, cobalt and nickel

[1,5-Bis(2-pyridylmethyl-N)-1,5-di­aza­cyclo­octane-N,N']chloronickel(II) perchlorate

[1,4,7-Tris(3-tert-butyl-5-methyl-2-hydroxybenzyl)-1,4,7-tri­aza­cyclononanato-N,N',N'',O,O',O'']chromium(III)

Cobalt(II) complexes of piperazine and derivatives: 1-methylpiperazin-4-ium tri­chloro(1-methylpiperazine-N⁴)cobaltate(II)

[N-Salicyl-N,N-bis­(salicyl­idene­nitrilo­ethyl)amino]iron(III) aceto­nitrile solvate

Molybdenum–tetra­carbonyl complexes with Schiff base ligands

Aqua­tetra­kis­[(4-chlorobenzoato)(μ₃-2-di­methylamino­ethanolato)copper(II)] hydrate

Polymeric aqua(N-ethylurea-O)(N-pyruv­idene-β-alaninato-O,N,O')copper(II)

Micacocidin A

Oxonium Λ-{N,N'-bis­[2(S)-pyrrolidinylmethyl]ethane-1,2-di­amine}-cis-α-di­chlorocobalt(III) dichloride dihydrate

A new polymorph of a carbonyliron complex from tetra­phenylhexa­penta­ene­: bis­(μ₃,η²,σ²-di­phenylallenyl­idene)octa­carbonyltriiron

trans-Bromodi­carbonyl(η⁵-cyclo­pentadienyl)(2,3,5,6-tetra­fluoro­phenyl)rhenium(III)

A cylindrical macrocycle with two caesium cations sandwiched between two di­aza-18-crown-6 macrocycles

Bis(terpyridine)ruthenium(II) bis­(hexa­fluorophosphate) diaceto­nitrile solvate

trans-Carbonylchlorobis(tri-p-tolylphosphine)rhodium(I)

Indaconitine 0.5-aceto­nitrile solvate

Pseudaconitine

Gliclazide

N—H⋯π(indole) intermolecular interactions in 3,3'-benzylidenedi­indole

tert-Butoxycarbonyl-L-leucyl-L-threoninamide

Dineo­pentylprehnitene (1,2,3,4-tetra­methyl-5,6-dineo­pentylbenzene) at 296 and 223K

6,6'-Di­meth­oxy-3,3',5,5'-tetra­methylbi­phenyl-2,2'-di­methanol

Hydrogen bonding in [(1R*,7aS*)-hexa­hydro-5-oxo-1H-pyrrolizinyl-1-yl]acetic acid

2-Amino­pyrimidine–terephthalic acid (1:1) complex

o-Chlorobenzaldehyde nicotinoylhydrazone dihydrate

4-Methyl-7,7a,13a,14-tetra­hydrobenzo[e]pyrano[2',3':5,6]naphtho[2,3-b][1,4]dioxin-2-one

4-Amino-3-methyl-1,2,4-triazole-5-thione derivative of p-nitro­phenylaldehyde

2-Hy­droxy-5-methyl-3-(morpholino­methyl)benzaldehyde, (I), and 4,4'-di­methyl-6,6'-bis­(morpholino­methyl)-2,2'-(ethylenedi­nitrilodi­methyl­idyne)diphenol, (II)

5-Benzoyl-1-ethyl-4-phenyl-1H-pyrimidin-2-one

N,N'-(4,5-Di­chloro-o-phenylene)bis­(4-tert-butylpyridine-2-carboxamide)

1-Iso­butyl-2,6,6-tri­methyl-4-oxo-4,5,6,7-tetra­hydro-3-indole­acetic acid

1,3-Bis(3-nitro­phenyl)triazene

25,27-Di­hydroxyeth­oxy-26,28-diprop­oxy-tert-butylcalix[4]arene

Interaction between an oxygen and an alkynyl-carbon atom in 1-(2-nitro­phenyl)-4-phenylbutadiyne

1,3,5-Tris(cyano­methyl)-2,4,6-tri­ethylbenzene

2,2'-Bi­phenyl (cyclo­hexylamino)phosphonate: a hydrogen-bonded dimer

Scalarolide and scalarin, sesterterpenes from Cacospongia and Ircinia sponges

9-Acetonyl-3-ethyl­idene-1,2,3,4-tetra­hydro­spiro[carbazole-1,2'-[1,3]di­thiolan]-4-one

4-(2,5-Di-tert-butylphenylnitrilo­methyl­idyne)-2-methoxyphenol

2-(2-Pyrrolyl)-1,3-benzo­thiazole

Diastereomeric complexes of 1,1'-bi­naphthyl-2,2'-diol and (R,R)-1,2-cyclo­hexanedi­amine

1,3-Di­amino-5-ammonio-1,3,5-tri­deoxy-cis-inositol iodide

Intramolecular N—H⋯O, intermolecular O—H⋯O, C—H⋯O and Csp³—H⋯π_arene interactions in (2S)-2-{[(2R)-2-hy­droxy-2-phenylethanoyl]amino}-4-methylpentanoic acid

1-Phenyltetrazole

β Metal-free phthalocyanine

Notes for Authors