issue contents

Journal logoSTRUCTURAL
ISSN: 2053-2296

January 2007 issue

Highlighted illustration

Cover illustration: Part of the crystal structure of ethyl 5-amino-1-(4-chloro­phen­yl)-1H-imidazole-4-carbox­yl­ate, showing the formation of a hydrogen-bonded chain along [001]. For the sake of clarity, H atoms not involved in the motifs shown have been omitted and only one orientation of the disordered ethyl group is shown. See Costa, Boechat, Wardell, Ferreira, Low & Glidewell [Acta Cryst. (2007), C63, o33-o37].

inorganic compounds

Acta Cryst. (2007). C63, i1-i3
doi: 10.1107/S0108270106047949
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The crystal structure of magnesium selenite 7.5-hydrate is characterized by two crystallographically distinct [Mg(H2O)6]2+ octa­hedra, one of which is disordered over two different orientations. The selenite groups and water mol­ecules (with partially disordered H atoms) bridge the octa­hedra via hydrogen bonds.

Acta Cryst. (2007). C63, i4-i6
doi: 10.1107/S0108270106050621
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The structure of monoclinic Cu3(SeO3)2Cl2 is based on layers of CuO4Cl trigonal bipyramids, CuO4 square planes and SeO3E tetra­hedra. The Cu polyhedra are connected by edge- and corner-sharing to form [010] chains and these chains are bridged by the Se atoms to form (001) layers. The compound is isostructural with Cu3(TeO3)2Br2.

Acta Cryst. (2007). C63, i7-i9
doi: 10.1107/S0108270106050839
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The structure of Mg2Ru2Cl10O·16H2O consists of layers of [Ru2Cl10O]4− anions, [Mg(H2O)6]2+ cations and water mol­ecules stacked along the a axis. Only the O atom bonded to Ru occupies the 2a site with \overline{1} symmetry. All the other atoms occupy general 4e sites. The crystal structure is stabilized by O—H⋯O and O—H⋯Cl inter­actions.

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A new quaternary compound in the Ca–Eu–Sn–O system, namely calcium europium tin hepta­oxide, Ca1.5Eu3Sn0.5O7, was prepared by solid-state reaction at 2073 K. All atoms in the structure are on 4i special positions (on mirrors) in space group C2/m. Ca/Eu sites are situated within two O octa­hedra and within two sevenfold coordination sites surrounded by O-capped trigonal prisms. A Ca/Eu/Sn site is coordinated by five O atoms. The compound has a new structure related to the structure of B-form Eu2O3.

metal-organic compounds

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Poly[1,4,8,11-tetra­azacyclo­tetra­decane(2+) [hepta-μ-sulfido-tris­ulfidohexa­anti­mony(III)]], {(C10H26N4)[Sb6S10]}n, was synthesized solvothermally using the macrocyclic tetra­mine 1,4,8,11-tetra­azacyclo­tetra­decane (cyclam) as the structure-directing agent. The structure consists of novel [Sb6S10]2− layers containing Sb2S2, Sb4S4 and Sb7S7 hetero-rings, which are separated by macrocyclic amine mol­ecules. The macrocylic amine mol­ecules are disordered over two crystallographically distinct positions and are diprotonated in order to balance the charge of the anionic layers.

organic compounds

Special and virtual issues

Acta Crystallographica Section C is planning special issues on

The Structural Chemistry of Homogeneous and Heterogeneous Catalysts

NMR Crystallography.

Full details are available on the special issues page.

The latest virtual issue, featuring Coordination polymers and with an introduction by Len Barbour, was published in July 2014.

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

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