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
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引用次数: 0
Abstract
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.
期刊介绍：
Structural Chemistry is an international forum for the publication of peer-reviewed original research papers that cover the condensed and gaseous states of matter and involve numerous techniques for the determination of structure and energetics, their results, and the conclusions derived from these studies. The journal overcomes the unnatural separation in the current literature among the areas of structure determination, energetics, and applications, as well as builds a bridge to other chemical disciplines. Ist comprehensive coverage encompasses broad discussion of results, observation of relationships among various properties, and the description and application of structure and energy information in all domains of chemistry.
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