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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 papersresearch papersStructures of hexakis(antipyrine)lead(II) complexes: the first example of the stereochemically active and inactive 6s2 lone pair for one lead(II) complex
Single-crystal X-ray diffraction studies on [Pb(anti)6]X2 (anti = antopyrine; X = OTf− and ClO4−) compounds revealed for the triflate salt, the formation of two polymorphs with both holodirected regular octahedral geometry (eccentricity value ɛ = 0) and hemidirected symmetry of a ψ-pentagonal bipyramid (ɛ = 0.14). This work demonstrates, for the first time, that one lead(II) ion can exhibit both active or inactive 6s2 lone-pair character in a complex.
research papersWater-bridged tetrameric supramolecular synthons in a novel tetrasubstituted imidazole–phenylalanine derivative synthesized via a Debus–Radziszewski reaction
A new imidazole derivative of phenylalanine was synthesized, the crystals displaying dimeric and/or tetrameric structures with unusual water double bridges.
research papersSynthesis, crystal structure and green luminescence of a novel manganese(II)-based hybrid: bis[(tert-butoxycarbonyl)methyltriphenylphosphonium] tetrachloridomanganate(II)
A novel phosphonium-based manganese(II) hybrid crystal, (TBTP)2[MnCl4] [TBTP is (tert-butoxycarbonyl)methyltriphenylphosphonium], displays green luminescence with a millisecond-scale lifetime (515 nm, 2.83 ms), attributed to the Mn2+ 4T1→6A1 transition. Electronic structure analysis reveals a spatial separation of frontier orbitals, a structural feature that may aid in achieving the long-lived emission.
research papersYK-4-250, a synthetic telmisartan–tempol conjugate: crystal structure of a stabilized free radical containing angiotensin AT1 receptor inhibitor
The first crystal structure of the telmisartan–tempol conjugate YK-4-250 is reported, revealing the intramolecular C–H⋯π interactions that stabilize the nitroxide radical while preserving the angiotensin AT1 receptor antagonist pharmacophore.
research papersPeculiarity of atomic displacements in garnets discovered through a single-crystal X-ray diffraction study of the Na-bearing vanadate garnet series
Garnets where the mean-square displacements of the tetrahedral cations are largest in the direction of adjacent dodecahedral cations were discovered through structure refinements of the Na-bearing vanadate garnet series. This peculiar atomic displacement behaviour occurs when the dodecahedral sites are occupied by different cation species with different valences and largely different sizes.
