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Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296

February 2021 issue

Highlighted illustration

Cover illustration: Seven com­plexes of four pyridine/dimine ligands having two flexible alcohol arms have been prepared and their structures determined. The com­plexes were found to catalyze the catalytic dismutation of both peroxide and superoxide, and only show catalase-like activity in the presence of a base. The com­plexes with coordinated water or chloride at the axial positions show higher superoxide dismutase activity than those with coordinated thio­cyanate ligands. See McKee & Kose [Acta Cryst. (2021), C77, 100-110].

research papers


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Two copper(I) iodide tetra­mers have been synthesized from reactions of CuI, 1,3-bis­(diphenyphosphan­yl)propane and 3- or 4-acetyl­pyridine. Structure analysis and photoluminescence studies indicate that the position of the acetyl group on the heterocyclic ligand has an obvious influence on the structural arrangement, inter­molecular inter­action and photophysical properties.

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The con­formational analysis of two new organotin(IV) com­plexes and their analogous structures from the Cambridge Structural Database (CSD) are presented. The factors influencing the con­formational behaviours and the CSD structures with inter­esting structural geometry parameters are studied.

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Single crystals of dicerium trialuminium tetra­germanide, Ce2Al3Ge4, have been synthesized from a high-temperature reaction using an eutectic mixture of Al and Ge as a metal flux. Through single-crystal X-ray diffraction it was established that Ce2Al3Ge4 crystallizes in the centrosymmetric space group Cmce (No. 64) with the Ba2Cd3Bi4 structure type (Pearson code oC36).

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Δ9-Tetra­hydro­cannabinolic acid A (THCA-A) crystallizes in the space group P212121, with Z′ = 2, and has the two independent mol­ecules related by a pseudo-twofold axis. The two independent carboxyl­ate groups form a nonplanar [R_{2}^{2}](8) hydrogen-bonded ring, with an inter­planar angle of 28.89 (8)°.

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Two new alkali/alkaline earth coordination polymers were prepared from benzene-1,2,4,5-tetra­carb­oxy­lic acid as a rigid polycarboxyl­ate metal linker and two types of flexible di­carboxyl­ate ligands as the second linker under similar hydro­thermal reaction conditions. The polymers were structurally characterized by single-crystal X-ray diffraction. The flexible di­carboxyl­ate ligands play an important role in tuning the detailed structures and characteristics of the com­plexes.

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Seven com­plexes of four pyridine/dimine ligands having two flexible alcohol arms have been prepared and their structures determined. The com­plexes were found to catalyze the catalytic dismutation of both peroxide and superoxide, and only show catalase-like activity in the presence of a base. The com­plexes with coordinated water or chloride at the axial positions show higher superoxide dismutase activity than those with coordinated thio­cyanate ligands.

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The formation of a self-inter­penetrated honeycomb mol­ecular network based upon 4,6-di­chloro­resorcinol, water, and the photoproduct rtct-tetra­kis­(pyridin-4-yl)cyclo­butane is reported. The photoproduct acts as a three-connected node to form a honeycomb network that contains channels running along the crystallographic b axis.

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A monohydrate of the 1:2 cocrystal salt formed from acriflavine and 3,5-di­nitro­benzoic acid was synthesized and structurally characterized. Detailed analysis and theoretical calculations of the inter­molecular inter­actions occurring in the crystal, with an emphasis on inter­actions involving nitro groups, were carried out.

Special and virtual issues

Acta Crystallographica Section C has recently published special issues on

Polyoxometalates (November 2018)

NMR Crystallography (March 2017)

Scorpionates: a golden anniversary (November 2016)

Full details are available on the special issues page.

The latest virtual issue features Coordination polymers, with an introduction by Len Barbour.

What are the 'most read' articles from the recent special issues?

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