Crystal structure refinement with SHELXL
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TLDR
New features added to the refinement program SHELXL since 2008 are described and explained.Abstract:
The improvements in the crystal structure refinement program SHELXL have been closely coupled with the development and increasing importance of the CIF (Crystallographic Information Framework) format for validating and archiving crystal structures. An important simplification is that now only one file in CIF format (for convenience, referred to simply as `a CIF') containing embedded reflection data and SHELXL instructions is needed for a complete structure archive; the program SHREDCIF can be used to extract the .hkl and .ins files required for further refinement with SHELXL. Recent developments in SHELXL facilitate refinement against neutron diffraction data, the treatment of H atoms, the determination of absolute structure, the input of partial structure factors and the refinement of twinned and disordered structures. SHELXL is available free to academics for the Windows, Linux and Mac OS X operating systems, and is particularly suitable for multiple-core processors.read more
Citations
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Polymeric iodobismuthates {[Bi3I10]} and {[BiI4]} with N-heterocyclic cations: promising perovskite-like photoactive materials for electronic devices
Andrey N. Usoltsev,Moneim Elshobaki,Moneim Elshobaki,Sergey A. Adonin,Sergey A. Adonin,Lyubov A. Frolova,Tatiyana A. Derzhavskaya,Pavel A. Abramov,Denis V. Anokhin,Denis V. Anokhin,Ilya V. Korolkov,Sergey Yu. Luchkin,Nadezhda N. Dremova,Keith J. Stevenson,Maxim N. Sokolov,Vladimir P. Fedin,Pavel A. Troshin +16 more
TL;DR: In this paper, a screening of the reactions between BiI3 and iodide salts of different N-alkylated heterocycles resulted in the preparation and structural characterization of six novel iodobismuthate complexes, including two compounds exhibiting an unprecedented polymeric moiety.
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A metal-peptide capsule by multiple ring threading.
TL;DR: Six equivalent C4-propeller-shaped rings, each consisting of four oligopeptides and Ag+, are threaded by each other a total of twelve times to assemble into a well-defined 4 nm-sized sphere, which acts as a huge molecular capsule.
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Synthesis, Crystal Structure and Green Luminescence in Zero-Dimensional Tin Halide (C8H14N2)2SnBr6.
TL;DR: The discovery of lead-free (C8H14N2)2SnBr6 and insight into the mechanism of green emission provide an essential platform toward unveiling the relationship between structure and property for 0D metal halide perovskites.
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Four- and five-component molecular solids: crystal engineering strategies based on structural inequivalence.
TL;DR: A logic driven synthetic approach is used in this first report of the isolation of stoichiometric four-component molecular solids.
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A Novel Drug-Drug Cocrystal of Levofloxacin and Metacetamol: Reduced Hygroscopicity and Improved Photostability of Levofloxacin.
TL;DR: A new drug-drug cocrystal of LVFX and an APAP analog was developed using a grinding and heating approach, which is superior to LVFX hydrates in both pharmacological and physicochemical properties.
References
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A short history of SHELX
TL;DR: This paper could serve as a general literature citation when one or more of the open-source SH ELX programs (and the Bruker AXS version SHELXTL) are employed in the course of a crystal-structure determination.
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Structure validation in chemical crystallography
TL;DR: This paper reports on the current status of structure validation in chemical crystallography and describes the current state of research in this area.
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On enantiomorph‐polarity estimation
TL;DR: In this article, the behaviour of the Rogers's η parameter for enantiomorph-polarity estimation is examined theoretically and experimentally on simulated intensity data for seven well-assorted compounds.
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The Cambridge Structural Database: a quarter of a million crystal structures and rising
TL;DR: The Cambridge Structural Database now contains data for more than a quarter of a million small-molecule crystal structures, and projections concerning future accession rates indicate that the CSD will contain at least 500,000 crystal structures by the year 2010.