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Zeitschrift für Kristallographie - Crystalline Materials

Editor-in-Chief: Pöttgen, Rainer

Ed. by Antipov, Evgeny / Bismayer, Ulrich / Boldyreva, Elena V. / Huppertz, Hubert / Petrícek, Václav / Tiekink, E. R. T.

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2196-7105
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Volume 216, Issue 3 (Mar 2001)

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Crystal structure determination of a series of small organic compounds from powder data

K. Goubitz / E. J. Sonneveld / H. Schenk
Published Online: 2009-09-25 | DOI: https://doi.org/10.1524/zkri.216.3.176.20326

Abstract

The crystal structures of 2,4-di-bromo-aniline (A; C6H5NBr2 ), 4-iodo-anisole (B; C7H7OI), 2-iodo-benzenemethanol (C; C7H7OI), 2-amino-benzothiazole (D; C7H6N2S) and 2-amino, 5-bromo-pyridine (E; C5H5N2Br) have been determined from X-ray powder diffraction data. Grid search and Rietveld refinement have been used to determine the structures. The crystals of (A) and (B) are orthorhombic, the crystals of (C), (D) and (E) are monoclinic. (A): Space group P212121, Z=4 with cell parameters a = 11.18(1), b = 16.17(1), c = 4.110(3)Å; (B): Space group Pca21, Z = 4, a = 6.288(4), b = 7.361(4), c = 16.93(1)Å; (C): Space group P21/n, Z = 4, a = 13.23(1), b = 4.652(3), c = 12.82(1)Å, β = 109.69(4)°; (D): Space group P21/c, Z = 4, a = 14.58(2), b = 4.094(4), c = 11.62(1)Å, β = 94.12(6)°; (E): Space group P21/c, Z = 4, a = 13.80(1), b = 5.839(5), c = 7.687(7)Å, β = 106.04(5)°. Chemical diagrams of all five compounds are depicted in Fig. 1. Soft constraints have been applied to the molecules during Rietveld refinement. The final Rp values obtained were 7.3 (A), 2.9 (B), 11.1 (C), 16.4 (D) and 7.9% (E) respectively. All compounds were measured on a Guinier camera. In addition, the structure of compound (A) was confirmed by single-crystal structure determination.

About the article

Published Online: 2009-09-25

Published in Print: 2001-03-01


Citation Information: Zeitschrift für Kristallographie - Crystalline Materials, ISSN (Online) 2196-7105, ISSN (Print) 2194-4946, DOI: https://doi.org/10.1524/zkri.216.3.176.20326. Export Citation

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