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The following articles are a selection of those recently accepted for publication in Acta Crystallographica Section C: Structural Chemistry.
See also Forthcoming articles in all IUCr journals.
research papersStructural changes in three mannopyranoses with varying degrees of acetylation
The structural changes in three mannopyranose compounds with varying degrees of acetylation are compared. In general, O-acetylation exerts little effect on the exo- and endocyclic C—C and endocyclic C—O bond lengths, but the exocyclic C—O bonds involved in O-acetylation are lengthened by ∼0.02 Å.
research papersresearch papersSynthesis, crystal structure and biological properties of Cd and Zn coordination polymers based on a flexible tripodal ligand
Two isostructural CdII/ZnII coordination polymers containing a flexible tripodal ligand were synthesized and characterized. The antioxidant activities against DPPH and the antidiabetic activities against α-amylase were evaluated in vitro.
research papersCrystal structure and pseudosymmetry analysis of the triclinic prodrug cloxazolam (Z′ = 4)
There are four independent molecules in the P
asymmetric unit of cloxazolam, related by a striking pseudosymmetry. The identical molecules consist of four rings linked in a rather rigid fashion. Even in the absence of strong hydrogen-bond interactions, the structure presents an unusual compactness (Kitaigorodskii packing index ≃ 0.71).
research papersCoordination polymers of CdII and PbII derived from bipyridine–glycoluril ligand: influence of metal-ion size and counter-ions
CdII and PbII coordination polymers have been synthesized using a bipyridine–glycoluril (BPG) ligand. A comparative analysis of the structures with different metal ions based on the BPG ligand and the influence of the metal-ion size and counter-ions on the formation of the diverse structures has been explored.
research papersThe heteroscorpionate ligand 2,2-bis(3,5-dimethylpyrazol-1-yl)-1,1-diphenylethanol and an easy preparation of its tungsten complex
A simple and straightforward synthesis of a heteroscorpionate tungsten complex has been developed. The crystal structures of the tungsten complex and the heteroscorpionate molecule have been analysed.
research papersA new three-dimensional cobalt(II) coordination polymer based on V-shaped 3,4′-oxydibenzoate: synthesis, crystal structure and magnetic properties
A new coordination polymer formulated as [Co(3,4′-obb)(4,4′-bipy)]n (3,4′-obb2− is 3,4′-oxydibenzoate and 4,4′-bipy is 4,4′-bipyridine) was prepared by the self-assembly of Co(NO3)2·6H2O with the rarely used 3,4′-obbH2 ligand and 4,4′-bipy under solvothermal conditions, and has been structurally characterized by elemental analysis, IR spectroscopy, single-crystal X-ray crystallography and powder X-ray diffraction.
research papersA simple graphical method to pinpoint local pseudosymmetries in Z′ > 1 cases
An intuitive method is presented for detecting pseudosymmetries in Z′ > 1 cases as a complement to well-proven strategies already available in the literature. It is based on the simple idea that the mid-points between equivalent atoms in symmetrically related molecules are disposed according to simple well-known patterns, which are easily recognizable by optical inspection.
