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Acta Cryst. (2013). A69, 533-534 [ doi:10.1107/S0108767313023702 ]
A new vision for Acta Crystallographica Section A
Simon Billinge (left) and John Miao, Section Editors of Acta A.
Acta Cryst. (2013). B69, 465-473 [ doi:10.1107/S2052519213021155 ]
X-ray diffraction: a powerful tool to probe and understand the structure of nanocrystalline calcium silicate hydrates
Sketch of the layer structure from tobermorite (top) and jennite (bottom), two model minerals commonly used to describe C-S-H crystal chemistry. Yellow polygons and purple tetrahedra respectively symbolize calcium and silicon coordination spheres.
Acta Cryst. (2013). C69, 1260-1266 [ doi:10.1107/S010827011302859X ]
Methanesulfonic acid salt forms of carbamazepine and 10,11-dihydrocarbamazepine
Formula: C15H13N2O+·CH3O3S-, C15H15N2O+·CH3SO3- and C15H12N2O·CF3COOHMethanesulfonic acid salt forms of carbamazepine and 10,11-dihydrocarbamazepine were characterized by single-crystal X-ray diffraction. The impact of salt formation on the carbamazepine framework is revealed through an examination of the C=O and C–N bond lengths. Similar analyses of 83 carbamazepine complexes from the CSD led to a re-examination of the trifluoroacetic acid complex, which was determined to be an intermediate-type complex with the acidic hydrogen at the mid-point between the acid and the base. This result has implications for the recent FDA guidelines on the development of pharmaceutical cocrystals. This paper forms part of the special issue on Pharmaceuticals, drug discovery and natural products.
Difference Fourier map for the trifluoroacetic acid carbamazepine complex at 100 K showing the position of the acidic hydrogen at the mid-point between the acid and base; contour level = 0.05 e Å-3.
Acta Cryst. (2013). D69, 2165-2166 [ doi:10.1107/S0907444913027352 ]
Acta Cryst. (2013). E69, m575-m576 [ doi:10.1107/S1600536813026585 ]
Bis[-N-(pyridin-2-ylmethyl)pyridin-3-amine-2N:N']disilver(I) bis(perchlorate) dimethyl sulfoxide disolvate
S.-H. Moon and K.-M. ParkIn the development of silver(I) coordination polymers, the investigation of Ag(I) coordination polymers using unsymmetrical dipyridyl ligands with nitrogen donor atoms on different positions in the two terminal pyridines still remains lacking. A self-assembly of the unsymmetrical ligand N-(pyridine-3-ylmethyl)pyridine-2-amine with the silver ion afforded an unusual sixteen-membered metallamacrocyclic dimer. In the crystal, various intermolecular interactions such as Ag···O, N–H···O, C–H···O and C–H··· interactions between the metallamacrocyclic dimers and the anions or the solvent molecules lead to the formation of a three-dimensional supramolecular network.
Acta Cryst. (2013). F69, 1207-1211 [ doi:10.1107/S1744309113028698 ]
A family portrait: structural comparison of the Whirly proteins from Arabidopsis thaliana and Solanum tuberosum
J. Appl. Cryst. (2013). 46, 1537-1543 [ doi:10.1107/S0021889813022796 ]
Capillary-based micro-battery cell for in situ X-ray powder diffraction studies of working batteries: a study of the initial intercalation and deintercalation of lithium into graphite
Sketch of the capillary-based micro-battery cell designed for in situ studies in transmission mode.
J. Synchrotron Rad. (2013). 20, 829-833 [ doi:10.1107/S0909049513022188 ]
U-shape rotating anti-cathode compact X-ray generator: 20 times stronger than the commercially available X-ray source
Take-off angle: 6 °, through ∅ 10 m pinhole, at 75 mm from the target.
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