Polymorphism in some new bis-hydrazone compounds

Author:

Dwivedi Bhavna,Das Dinabandhu

Abstract

We describe the polymorphism of four new bis-hydrazone compounds, namely butane-2,3-dione 2,3-bis{[bis(4-fluorophenyl)methylidene]hydrazone}, C30H22F4N4 (1), butane-2,3-dione 2,3-bis{[bis(4-chlorophenyl)methylidene]hydrazone}, C30H22Cl4N4 (2), butane-2,3-dione 2,3-bis{[bis(4-methylphenyl)methylidene]hydrazone}, C34H34N4 (3), and butane-2,3-dione 2,3-bis({bis[4-(dimethylamino)phenyl]methylidene}hydrazone), C38H46N8 (4), derived by the condensation reaction between substituted benzophenone hydrazone and butane-2,3-dione. Concomitant polymorphism has been observed in 1, 2 and 3. Overlays of molecules of the different polymorphs indicate that there is conformational adjustment in the crystal structures of the polymorphs of 1 and 2, i.e. packing polymorphism, which was confirmed by a computational study. On the other hand, conformational change was observed in the cases of the polymorphs of compounds 3 and 4, i.e. conformational polymorphism.

Publisher

International Union of Crystallography (IUCr)

Subject

Materials Chemistry,Inorganic Chemistry,Physical and Theoretical Chemistry,Condensed Matter Physics

Reference29 articles.

1. X-Seed — A Software Tool for Supramolecular Crystallography

2. Bernal, I. (2007). In Models, Mysteries and Magic of Molecules, edited by J. C. A. Boeyens & J. F. Ogilvie, pp. 137-165. New York: Springer.

3. Bernstein, J. (1987). In Organic Solid State Chemistry, ch. 13. Amsterdam: Elsevier.

4. Crystal growth, polymorphism and structure-property relationships in organic crystals

5. Bernstein, J. (2002). In Polymorphism in Molecular Crystals. Oxford University Press.

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3