issue contents

Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296

May 2021 issue

Highlighted illustration

Cover illustration: α-2′-De­oxy­cyti­dine is the α-anomeric analogue of the canonical β-2′-de­oxy­cyti­dine and adopts conformational parameters which lie outside the conformational range usually preferred by α-nucleo­sides. Crystal packing is controlled by N—H⋯O and O—H⋯O contacts between the nucleobase and sugar moieties. See Budow-Busse, Chai, Müller, Daniliuc & Seela [Acta Cryst. (2021), C77, 202–208].

research papers


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The structure of an energetic com­pound is reported whose detailed crystallographic data were not available previously. The structure was determined using X-ray diffraction on monocrystals synthesized by electronic oxidation. The results are additional confirmation that protonation of the 1,2,4-triazole ring results in similar trends with regard to bond angles.

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α-2′-De­oxy­cyti­dine is the α-anomeric analogue of the canonical β-2′-de­oxy­cyti­dine and adopts conformational parameters which lie outside the conformational range usually preferred by α-nucleo­sides. Crystal packing is controlled by N—H⋯O and O—H⋯O contacts between the nucleobase and sugar moieties.

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The mol­ecular structures of five diorganotin(IV) carboxyl­ates show two of the typically observed motifs: discrete mononuclear com­plex mol­ecules with skew-trapezoidal bipyramidally coordinated SnIV atoms and discrete tetra­nuclear mol­ecules with Sn4O2 cores surrounded by four bridging carboxyl­ate ligands, plus two alkyl ligands at each SnIV centre. This diversity may be influenced by the stoichiometric ratio of com­ponents in the synthesis.

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Three metal–organic frameworks constructed by quaternary-ammonium-modified isophthalic acid are reported.

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The multicomponent alumosilicide Li12Mg3Si3Al belongs to the structural family based on the Cu15Si4 type. The reversible hydrogen storage capacity is excellent and the gravimetric storage capacity of this new material is higher compared to Li12Mg3Si4. The enthalpy of hydrogen desorption is lower compared to known lithium-based hydrides.

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A new polyborate, Na3EuB8O15, with a bright-red emission under near-UV light excitation due to the 4f→4f transition of the Eu3+ ion, was prepared using the high-temperature molten-salt method and structurally characterized by single-crystal X-ray diffraction analysis.

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New cadmium and zinc complexes based on 1,1′-bis­(phosphan­yl)ferrocene ligands and their phosphine chalcogenide derivatives have been prepared and characterized by X-ray crystallography.

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A novel heterometallic CuI–FeII π,σ-com­plex based on an allyl-substituted 1,3,4-thia­diazole ligand has been prepared using the alternating-current electrochemical technique and its structure studied. Agglomeration of [Cu2FeCl2(Pesta)4]2+ subunits {Pesta is 5-[(prop-2-en-1-yl)sulfan­yl]-1,3,4-thia­diazol-2-amine} into an infinite chain is prevented by π-coordination of the allylic C=C bond to the CuI ion. An energy framework computational analysis was also performed for Pesta.

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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