issue contents

Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890

September 2014 issue

Highlighted illustration

Cover illustration: The molecular structure of 2,7-diethoxy-1,8-bis(4-nitrobenzoyl)naphthalene possesses crystallographically imposed twofold symmetry with two C atoms lying on the rotation axis. The crystal packing is characterized by C-H...O=C hydrogen bonds between the benzene rings and the carbonyl groups and C-H...O=N hydrogen bonds between the benzene rings and the nitro groups. See: Mohri, Ohisa, Noguchi, Yonezawa & Okamoto [Acta Cryst. (2014). E70, 138-141].

research communications


link to html
The mol­ecular structure of [HgCl2(C12H20N2)] is a rare example where the HgII atom is bound to a Cl2N2 donor set for which the N atoms originate from aliphatic tertiary amine groups.

link to html
The crystal structure of the title compound allowed the cis substituent orientation on the cyclo­penta­none ring to be established. The mol­ecular conformation and crystal packing are governed by a network of hydrogen bonds and by π–π stacking.

link to html
In the title compound the four-fused-rings system is approximately planar and the pyrrolidine rings of the pyrrolidizine fragment adopt a twist conformation. In the crystal, mol­ecules are linked by C—H⋯O hydrogen bonds and C—H⋯π inter­actions, forming double-chains parallel to the c axis.

link to html
In the title compound, the pyran and pyrone rings adopt slightly distorted half-chair and envelope conformations, respectively. In the crystal, C—H⋯O and π–π inter­actions connect the mol­ecules, forming double layers that stack along the c-axis direction.

link to html
The structure of a TEMPO derivative with a propyn­yloxy substituent at the 4-position of the piperidine ring is reported. The crystal packing features an unusual C—H⋯π inter­action involving the triple bond of the propyne group which combines with C—H⋯O hydrogen bonds to stack the mol­ecules along the b-axis direction.

link to html
The structure of MgSeO4·7H2O has been determined by single-crystal Laue diffraction methods using pulsed neutron radiation. The compound is isostructural with the sulfate analogue, MgSO4·7H2O.

link to html
The title compound possesses crystallographically imposed twofold symmetry with two C atoms lying on the rotation axis and has a non-coplanarly accumulated aromatic-rings structure. In the crystal, C—H⋯O=C hydrogen bonds between the benzene rings and the carbonyl groups and C—H⋯O=N hydrogen bonds between the benzene rings and the nitro groups are observed; these C—H⋯O hydrogen bonds link the mol­ecules, forming a three-dimensional structure.

link to html
In this CdII complex incorporating two monodentate acetate groups and two N,N′-chelating pyridine-2-carboxamide oxime ligands, mol­ecules are assembled into chains along the c axis via N—H⋯O hydrogen bonding. The resulting chains are further assembled by ethanol solvent mol­ecules into a three-dimensional supermolecular structure.

link to html
In the title compound, the bicyclic ring system adopts a twin-chair conformation. In the crystal, N—H⋯O, C—H⋯O and C—H⋯F inter­actions connect the mol­ecules, forming supra­molecular chains propagating along the b-axis direction.

link to html
Chromium(III) complexes of two ethyl­ene cross-bridged tetra­aza­macrocycles were prepared and structurally characterized in order to extend the coordination chemistry of this ligand type farther towards the early transition metals.

link to html
In the title compound, the 1,2,3,4-tetra­hydro­pyridine ring of the quinoline moiety adopts a half-chair conformation while the pyrrolidine ring has an envelope conformation. In the crystal, mol­ecules are linked by N—H⋯O and C—H⋯O hydrogen bonds, forming sheets lying parallel to (10\overline{1}), which are linked via C—H⋯F hydrogen bonds and C—H⋯π inter­actions, forming a three-dimensional structure.

link to html
A distinctive feature of the crystal structure is the geometry of the dtba moiety, which appears to be stretched and acts as an hydrogen-bonding connector, forming linear chains along [-211] with the 4,4′-bpy moiety by way of O—H⋯N hydrogen bonds and C—H⋯O interactions. The influence of the mol­ecular shape on the hydrogen-bonding pattern is analysed by comparing the title compound and two other 4,4′-bpy co-crystals, showing the way in which this correlates with the packing arrangement.

data reports

inorganic compounds





metal-organic compounds




















organic compounds

















































































































Research communications

The first papers in this new format were published in July 2014. Research communications are longer papers with new text sections designed to help authors bring out the science behind their structure determinations. Figures are included in the published paper and, for the first time in Acta E, individual reports are not limited to single structure determinations. The Research communications format will make Acta E the natural home for structure determinations with interesting science to report.

Follow Acta Cryst. E
Sign up for e-alerts
Follow Acta Cryst. on Twitter
Follow us on facebook
Sign up for RSS feeds