issue contents
January 2019 issue
![Highlighted illustration](/c/issues/2019/01/00/graphics/coverill.gif)
Cover illustration: Two novel energetic salts of ethylenedinitramine (EDNA) with alkanediamines have been crystallized and analyzed for their thermal properties. The extensive hydrogen-bonding networks in the energetic salts serve to improve their friction and shock sensitivity. See Roodt, Uprety, Levendis & Arderne [Acta Cryst. (2018), C74, 54-60].
research papers
Download citation
![cross.png](/logos/buttonlogos/cross.png)
Download citation
![cross.png](/logos/buttonlogos/cross.png)
The compound 4-phenyl-1-[phenyl(pyridin-2-yl)methylidene]semicarbazide crystallized as the E isomer due to the existence of weak π–π interactions between pairs of molecules. Its inorganic salts also crystallized as the E isomers, influenced by the establishment of hydrogen bonds involving the N—H groups of the cation and the water molecules and counter-ions (chloride, nitrate or thiocyanate). The calculated IR spectrum of the hydrated cation is in good agreement with the experimental results.
Download citation
![cross.png](/logos/buttonlogos/cross.png)
Download citation
![cross.png](/logos/buttonlogos/cross.png)
A new two-dimensional coordination polymer based on 5,5′-methylenebis(2,4,6-trimethylisophthalic acid) and 2,7-bis(1H-imidazol-1-yl)fluorene has been prepared and structurally characterized.
CCDC reference: 1875032
Download citation
![cross.png](/logos/buttonlogos/cross.png)
Download citation
![cross.png](/logos/buttonlogos/cross.png)
The [4]pseudorotaxane of β-cyclodextrin (β-CD) with coffee chlorogenic acid (CGA) is reported for the first time in CD inclusion complexes. The atomistic and thermodynamic insights of the trimodal and dimeric β-CD–CGA inclusion complexes are gained through single-crystal X-ray diffraction combined with DFT calculations.
CCDC reference: 1499415
Download citation
![cross.png](/logos/buttonlogos/cross.png)
Download citation
![cross.png](/logos/buttonlogos/cross.png)
The crystal structure of a heterocyclic molecule that exhibits an acceptor–acceptor–donor hydrogen-bonding pattern is reported, namely 2-aminoimidazo[1,2-a][1,3,5]triazin-4(3H)-one (trivially named P). P is part of an `artificially expanded genetic information system' (AEGIS). The crystal structure shows two tautomers of P packed in a Watson–Crick fashion cocrystallized in a 1:1 ratio.
CCDC reference: 1881877
Download citation
![cross.png](/logos/buttonlogos/cross.png)
Download citation
![cross.png](/logos/buttonlogos/cross.png)
This work reports a new acetonitrile-solvated cocrystal of piroxicam (PRX) and succinic acid (SA). The outcome of crystallization from acetonitrile can be controlled by varying only the PRX:SA ratio, with a higher PRX:SA ratio in solution unexpectedly favouring a lower stoichiometric ratio in the solid product.
CCDC reference: 1860488
Download citation
![cross.png](/logos/buttonlogos/cross.png)
Download citation
![cross.png](/logos/buttonlogos/cross.png)
Four novel isostructural lanthanide(III) coordination polymers based on a novel N-oxydic pyridyl naphthalenediimide ligand were synthesized and their crystal structures analysed. One of them demonstrates potential as an indirect band gap semiconductor material.
Download citation
![cross.png](/logos/buttonlogos/cross.png)
Download citation
![cross.png](/logos/buttonlogos/cross.png)
The electron-density-derived properties of the cocrystal of an antimalarial drug were studied using X-ray diffraction data collected at room temperature.
Download citation
![cross.png](/logos/buttonlogos/cross.png)
Download citation
![cross.png](/logos/buttonlogos/cross.png)
Two novel energetic salts of ethylenedinitramine (EDNA) with alkanediamines have been crystallized and analyzed for their thermal properties. The extensive hydrogen-bonding networks in the energetic salts serve to improve their friction and shock sensitivity.
Download citation
![cross.png](/logos/buttonlogos/cross.png)
Download citation
![cross.png](/logos/buttonlogos/cross.png)
The crystal structure of Co6(CO3)2(OH)8·H2O was solved ab initio and refined from synchrotron powder diffraction data.
CCDC reference: 1885213
Download citation
![cross.png](/logos/buttonlogos/cross.png)
Download citation
![cross.png](/logos/buttonlogos/cross.png)
Four 2,2′-bisindolylmethanes (BIMs) were synthesized and two were characterized crystallographically. These compounds show remarkably similar hydrogen-bonding motifs in the solid state.
Download citation
![cross.png](/logos/buttonlogos/cross.png)
Download citation
![cross.png](/logos/buttonlogos/cross.png)
In the structures of two chalcogenapentalene derivatives, 6-phenyl-6,7-dihydro-5H-2,3-dioxa-2aλ4-selenacyclopenta[hi]indene and 5-phenyl-5,6-dihydro-4H-benzo[c][1,2]oxaselenole-7-carbaldehyde, the former is stabilized by Se—O bonds, while in the latter, there is both an Se—Se bond and an Se⋯O interaction, which helps in the stabilization of the structure.
Download citation
![cross.png](/logos/buttonlogos/cross.png)
Download citation
![cross.png](/logos/buttonlogos/cross.png)
The statistically identical chiral architectures constructed from N—H⋯O and C—H⋯O hydrogen bonds are discussed for a pair of optical isomers belonging to the amidophosphoester family.
book reviews
Free ![Open Access](/logos/open.png)
![Open Access](/logos/open.png)