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Journal logoSTRUCTURAL
ISSN: 2053-2296

April 2007 issue

Highlighted illustration

Cover illustration: A packing diagram for dibromidotetra­kis(tetra­hydro­furan)magnesium(II), viewed in the bc plane. C and H atoms have been omitted for clarity. Key: Mg atoms are shaded, Br atoms are dotted and O atoms are cross-hatched. See Lorbach, Lerner & Bolte [Acta Cryst. (2007), C63, m174-m176]

inorganic compounds

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The structure of the title compound is described as a cubic close-packed arrangement of O atoms containing Cu+/Cu2+ ions in a tetra­hedral coordination. Slabs of edge-sharing CrO6 octa­hedra and isolated CuO4 and GeO4 tetra­hedra are aligned parallel to the bc plane and are separated from each other by GeO4 tetra­hedra along a.

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This acidic ternary rare-earth sulfate is unique as it contains rare-earth monomers, [Ce(HSO4)(SO4)4]5−, and the structure is composed of these monomers, water mol­ecules, discrete hydrogensulfate ions and potassium ions held together by ionic inter­actions. There are two alternating layers in the structure, with the compositions [K4Ce(HSO4)(SO4)4] and [K2(HSO4)(H2O)]+.

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The title compound, lithium trimanganese bis­[tri­oxo­selenate(IV)] hexa­kis[hydrogentrioxoselenate(IV)], is built up from a vertex-sharing network of distorted MnIIIO6 octa­hedra, SeO3 and HSeO3 pyramids, and unusual Li(OH)6 octa­hedra, resulting in a dense three-dimensional structure. Mn, Li and one Se atom have site symmetries of \overline{1}, \overline{3}, and 3, respectively. An O—H⋯O hydrogen bond helps to establish the crystal packing.

metal-organic compounds

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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