issue contents

Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296

October 2020 issue

Highlighted illustration

Cover illustration: The structures of five s-block metal salt forms of three di­sulfonated monoazo dyes are presented. The coordination behaviour of the azo ligands and the water ligands, the dimensionality of the coordination polymers and the overall packing motifs of these five structures are contrasted to those of mono­sulfonate monoazo congers. It is found that two of the com­pounds adopt similar structural types to those of mono­sulfonate species but that the other three structures do not. See Gardner, Kennedy, McCarney, Staunton, Stewart & Teat [Acta Cryst. (2020), C76, 972-981].

research papers


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Structural confirmation of the elusive mer-MoCl3O(Et2O)2 com­plex has been achieved through single-crystal X-ray diffraction techniques and Hirshfeld surface analysis.

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A novel ladder-type silver(I) coordination polymer with 4,4′-bi­pyridine and 4-[(4-carb­oxy­benz­yloxy)meth­yl]benzoate ligands exhibits an obvious Ag—Ag interaction. The legs of the laddder are formed by parallel 4,4′-bipy ligands and silver ions, and the rungs are constructed by Ag—Ag interactions. The com­plex displays favourable fluorescence properties.

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Two new polymorphic forms of combretastatin A-4, an inhibitor of tubulin polymerization at the colchicine binding site, were identified. The results confirm the role of weak inter­actions in the determination of crystal architecture and additionally hint at an explanation for the results of crystallization attempts: the new monoclinic form has significantly lower energy than the form reported earlier.

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Bis­(5-amino-1,2,4-triazol-4-ium-3-yl)methane dinitrate, BATZM·(NO3)2, is a V-shaped mol­ecule that through hydrogen bonding from BATZM to nitrate anions results in a two-dimensional sheet. The com­pound has an energetic content greater than TNT, making it a suitable candidate for explosives.

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The structures of five s-block metal salt forms of three di­sulfonated monoazo dyes are presented. The coordination behaviour of the azo ligands and the water ligands, the dimensionality of the coordination polymers and the overall packing motifs of these five structures are contrasted to those of mono­sulfonate monoazo congers. It is found that two of the com­pounds adopt similar structural types to those of mono­sulfonate species but that the other three structures do not.

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Density functional theory (DFT) calculations have been used to study the influence of cation–π inter­actions on the electronic properties of the complexes formed by Altretamine, an anti­cancer drug, with mono- and divalent (Li+, Na+, K+, Be2+, Mg2+ and Ca2+) metal cations.

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The dissolution of 6-amino­thio­cytosine in common solvents (such as methanol, dimethyl sulfoxide and di­chloro­methane) under alkaline conditions is shown to afford four new com­pounds with a 6-amino­thio­cytosine skeleton. The crystal architectures of these com­pounds are found to be strongly influenced by extensive hydrogen-bond networks, although some individual features are also observed.

addenda and errata


Special and virtual issues

Acta Crystallographica Section C has recently published special issues on

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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