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CELLOPT :
CELLOPT : improved unit-cell parameters for electron diffraction data of small-molecule crystals
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Gruene, Tim (author)
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- Clabbers, Max T. B. (author)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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Luebben, Jens (author)
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Chin, Jia Min (author)
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Reithofer, Michael R. (author)
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Stowasser, Frank (author)
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Alker, André M. (author)
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(creator_code:org_t)
- 2022
- 2022
- English.
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In: Journal of applied crystallography. - 0021-8898 .- 1600-5767. ; 55, s. 647-655
- Related links:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Electron diffraction enables structure determination of organic small molecules using crystals that are too small for conventional X-ray crystallography. However, because of uncertainties in the experimental parameters, notably the detector distance, the unit-cell parameters and the geometry of the structural models are typically less accurate and precise compared with results obtained by X-ray diffraction. Here, an iterative procedure to optimize the unit-cell parameters obtained from electron diffraction using idealized restraints is proposed. The cell optimization routine has been implemented as part of the structure refinement, and a gradual improvement in lattice parameters and data quality is demonstrated. It is shown that cell optimization, optionally combined with geometrical corrections for any apparent detector distortions, benefits refinement of electron diffraction data in small-molecule crystallography and leads to more accurate structural models.
Subject headings
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Keyword
- electron diffraction
- precision of unit-cell parameters
- crystal structure determination
- compensation for experimental and instrumental errors
Publication and Content Type
- ref (subject category)
- art (subject category)
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