Acta Crystallographica Section C in 2012

Acta Crystallographica Section C in 2012

Notes for authors 2012

PbCa₂[Al₈O₁₅] with a novel three-dimensional aluminate anion

In the structure of PbCa₂[Al₈O₁₅], AlO₄ tetra­hedra and AlO₅ trigonal bipyramids in a 3:1 ratio constitute the framework [Al₈O₁₅]⁶⁻ aluminate anion through corner- and edge-sharing. Pb²⁺ and Ca²⁺ cations exhibit coordination numbers of 7 and 6, respectively.

Magnesium chloride tetra­hydrate, MgCl₂·4H₂O

The structure of the title compound is built up from MgCl₂(H₂O)₄ octa­hedra with a trans configuration. Each complex is situated on a crystallographic twofold axis, with the rotation axis aligned along one H₂O—Mg—OH₂ axis. They are connected by a complex network of O—H⋯Cl hydrogen bonds. The structure contains two-dimensional sections that are essentially identical to those in the reported tetra­hydrates of CrCl₂, FeCl₂, FeBr₂ and CoBr₂, but they are stacked in a different manner in MgCl₂·4H₂O compared with the transition metal structures.

[1,3-Bis(2,6-diiso­propyl­phenyl)imidazol-2-yl­idene]chloridogold(I)

A new layered Ca–succinate coordination polymer

Deca­aqua­bis­(μ₃-4-hy­droxy­pyridine-2,6-di­carboxyl­ato)bis­(4-hy­droxy­pyridine-2,6-di­carboxyl­ato)tetra­manganese(II) 3.34-hydrate: a new three-dimensional open metal–organic framework based on a tetra­nuclear Mn^II complex of chelidamic acid and undecameric stitching water clusters

The conformations of two copper(I) complexes of 1H-benzimidazole-2(3H)-thione and thio­saccharinate

A triclinic polymorph of cyclo-tetra-μ-thio­saccharinato-κ⁸S:S-tetra­kis[(tri­phenyl­phosphane-κP)silver(I)]

Poly[di-μ-aqua-μ-1,2-bis­(pyridin-4-yl)ethene-κ²N:N′-tetra­kis­(4-iodobenzo­ato-κ²O,O′)dicadmium]

Influence of chloro­form on crystalline products yielded in reactions of 5,10,15,20-tetra­phenyl­porphyrin with HCl and copper(II) salts

Benz[cd]indol-2(1H)-one at 298 and 100 K

Disorder and conformational analysis of methyl β-D-galacto­pyranosyl-(1→4)-β-D-xylo­pyran­oside

Hydrogen-bonded assembly in six closely related pyrazolo­[3,4-b]pyridine derivatives; a simple chain, three types of chains of rings and a complex sheet structure

Probing the relationships between mol­ecular conformation and inter­molecular contacts in N,N-di­benzyl-N′-(furan-2-carbonyl)­thio­urea

2,2′′,3,3′′,4,4′′,5,5′′-Octa­phenyl-1,1′:4′,1′′-terphenyl and 2′,3′,5′,6′-tetra­fluoro-2,2′′,3,3′′,4,4′′,5,5′′-octa­phenyl-1,1′:4′,1′′-terphen­yl

Tizanidine and tizanidine hydro­chloride: on the correct tautomeric form of tizanidine

Two succinic acid derivatives of 2-ethyl-6-methyl­pyridin-3-ol