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- W2044337145 abstract "Abstract The crystal structures of 2,4-di-bromo-aniline (A; C 6 H 5 NBr 2 ), 4-iodo-anisole (B; C 7 H 7 OI), 2-iodo-benzenemethanol (C; C 7 H 7 OI), 2-amino-benzothiazole (D; C 7 H 6 N 2 S) and 2-amino, 5-bromo-pyridine (E; C 5 H 5 N 2 Br) 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 P 2 1 2 1 2 1 , Z =4 with cell parameters a = 11.18(1), b = 16.17(1), c = 4.110(3)Å; (B): Space group Pca 2 1 , Z = 4, a = 6.288(4), b = 7.361(4), c = 16.93(1)Å; (C): Space group P 2 1 / n , Z = 4, a = 13.23(1), b = 4.652(3), c = 12.82(1)Å, β = 109.69(4)°; (D): Space group P 2 1 / c , Z = 4, a = 14.58(2), b = 4.094(4), c = 11.62(1)Å, β = 94.12(6)°; (E): Space group P 2 1 / 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 R p 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." @default.
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- W2044337145 date "2001-03-01" @default.
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- W2044337145 title "Crystal structure determination of a series of small organic compounds from powder data" @default.
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- W2044337145 doi "https://doi.org/10.1524/zkri.216.3.176.20326" @default.
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