Accurate intensity integration in the twinned γ-form of o-nitroaniline

o-Nitroaniline, C6H6N2O3, is known to be polymorphic. The α-form is probably amorphous, while the β- and γ-forms are crystalline. Difficulties with the unit-cell determination of the γ-form were reported as a consequence of twinning. In this paper, newly recorded diffraction data of the γ-form of o-...

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Main Authors: Martin Lutz, Loes Kroon-Batenburg
Format: Article
Language:English
Published: International Union of Crystallography 2022-11-01
Series:IUCrData
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Online Access:http://scripts.iucr.org/cgi-bin/paper?S2414314622010598
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author Martin Lutz
Loes Kroon-Batenburg
author_facet Martin Lutz
Loes Kroon-Batenburg
author_sort Martin Lutz
collection DOAJ
description o-Nitroaniline, C6H6N2O3, is known to be polymorphic. The α-form is probably amorphous, while the β- and γ-forms are crystalline. Difficulties with the unit-cell determination of the γ-form were reported as a consequence of twinning. In this paper, newly recorded diffraction data of the γ-form of o-nitroaniline are described that were processed taking into account the two twin lattices. Data were partly deconvoluted and much better agreement was obtained in terms of R1 values and C—C bond precision. The availability of raw data and proper reprocessing using twin lattices is by far superior to efforts to de-twin processed structure factors.
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spelling doaj.art-43bd8a4d50f54ee3b547d9492ab34c092022-12-22T04:21:26ZengInternational Union of CrystallographyIUCrData2414-31462022-11-01711x22105910.1107/S2414314622010598ii4001Accurate intensity integration in the twinned γ-form of o-nitroanilineMartin Lutz0Loes Kroon-Batenburg1Department of Chemistry, Structural Biochemistry, Bijvoet Centre for Biomolecular Research, Faculty of Science, Utrecht University, Utrecht, The NetherlandsDepartment of Chemistry, Structural Biochemistry, Bijvoet Centre for Biomolecular Research, Faculty of Science, Utrecht University, Utrecht, The Netherlandso-Nitroaniline, C6H6N2O3, is known to be polymorphic. The α-form is probably amorphous, while the β- and γ-forms are crystalline. Difficulties with the unit-cell determination of the γ-form were reported as a consequence of twinning. In this paper, newly recorded diffraction data of the γ-form of o-nitroaniline are described that were processed taking into account the two twin lattices. Data were partly deconvoluted and much better agreement was obtained in terms of R1 values and C—C bond precision. The availability of raw data and proper reprocessing using twin lattices is by far superior to efforts to de-twin processed structure factors.http://scripts.iucr.org/cgi-bin/paper?S2414314622010598twinningscatteringtwin interfaceraw data
spellingShingle Martin Lutz
Loes Kroon-Batenburg
Accurate intensity integration in the twinned γ-form of o-nitroaniline
IUCrData
twinning
scattering
twin interface
raw data
title Accurate intensity integration in the twinned γ-form of o-nitroaniline
title_full Accurate intensity integration in the twinned γ-form of o-nitroaniline
title_fullStr Accurate intensity integration in the twinned γ-form of o-nitroaniline
title_full_unstemmed Accurate intensity integration in the twinned γ-form of o-nitroaniline
title_short Accurate intensity integration in the twinned γ-form of o-nitroaniline
title_sort accurate intensity integration in the twinned γ form of o nitroaniline
topic twinning
scattering
twin interface
raw data
url http://scripts.iucr.org/cgi-bin/paper?S2414314622010598
work_keys_str_mv AT martinlutz accurateintensityintegrationinthetwinnedgformofonitroaniline
AT loeskroonbatenburg accurateintensityintegrationinthetwinnedgformofonitroaniline