The structure and Hirshfeld surface analysis of the 4-amino 3-nitrobenzoic acid triclinic polymorph

被引：0
作者：
F. S. Narmanova
Kh. Kh. Turaev
Sh. A. Kasimov
A. B. Ibragimov
A. S. Normamatov
A. Kh. Ruzmetov
I. J. Mengnorov
C. Balakrishnan
A. G. Eshimbetov
J. M. Ashurov
机构：
[1] Termez State University,Department of Chemistry
[2] Institute of General and Inorganic Chemistry of Uzbekistan Academy of Sciences,undefined
[3] Erode Sengunthar Engineering College,undefined
[4] Perundurai,undefined
[5] Erode,undefined
[6] Institute of Bioorganic Chemistry of Uzbekistan Academy of Sciences,undefined
来源：
Structural Chemistry | 2024年 / 35卷
关键词：
4-Amino-3-nitrobenzoic acid; Triclinic polymorph; Structure; X-ray crystallography; Hirshfeld surfaces analysis;
D O I：
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摘要：
By preparation of 4-amino-3-nitrobenzoic acid (4-A3NBA-P) in the triclinic crystal form in contrast to known monoclinic crystals polymorphism of this compound has been established. The monoclinic form is called polymorph I, while triclinic crystals are designated as polymorph II. In the former polymorph, 4-A3NBA molecules are associated with the 3D network by H-bonds, while in the case of the latter polymorph, the H-bonded layers are incorporated into crystal structure by π•••π interactions. Therefore, Hirshfeld surface analyses indicate that the percentage of the O•••H/H•••O interactions of polymorph II (~ 39.1%) is less than that of polymorph I (54.5%). The TG-DTA studies attest that there is no “polymorph II → polymorph I” phase transition.
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页码：953 / 960
页数：7
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