Structure of 2,3,5,6-Tetraiodo-1,4-Benzenedicarboxylic Acid and Features of the Thermolysis of Iodinated Terephthalic Acids

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-07-26 DOI:10.1134/S0022476624070060

M. A. Polozov, D. A. Zherebtsov, A. A. Osipov, K. Radzhakumar, S. A. Naifert, D. V. Spiridonova, A. S. Zaguzin, D. A. Vinnik

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Abstract

The crystal structure of 2,3,5,6-tetraiodo-1,4-benzenedicarboxylic acid dihydrate is described and the following structural features are established by XRD: C₈H₆I₄O₆, M 705.73; monoclinic crystal system, P2₁/n space group; unit cell parameters: a = 5.78160(10) Å, b = 15.0976(2) Å, c = 17.3437(3) Å; α = 90°, β = 94.602(2)°, γ = 90°; V = 1509.02(4) Å³, Z = 4, ρ_calc = 3.106 g/cm³. Some features of the thermolysis of terephthalic acid and its iodine derivatives are described. Diiodoterephthalic acid is the least thermally stable, tetraiodoterephthalic acid is the most stable. The iodinated terephthalic acids have similar heats of fusion. The largest amount of carbon residue is formed during the decomposition of 2,3,5,6-tetraiodo-1,4-benzenedicarboxylic acid.

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2,3,5,6-四碘-1,4-苯二甲酸的结构和碘化对苯二甲酸的热解特征

摘要描述了 2,3,5,6-四碘-1,4-苯二甲酸二水合物的晶体结构，并通过 XRD 确定了以下结构特征：C8H6I4O6，M 705.73；单斜晶系，P21/n 空间群；单胞参数：a = 5.78160(10) Å，b = 15.0976(2) Å，c = 17.3437(3) Å；α = 90°，β = 94.602(2)°, γ = 90°；V = 1509.02(4) Å3，Z = 4，ρcalc = 3.106 g/cm3。描述了对苯二甲酸及其碘衍生物热解的一些特征。二碘对苯二甲酸的热稳定性最差，而四碘对苯二甲酸则最为稳定。碘对苯二甲酸的熔化热相似。2,3,5,6-四碘-1,4-苯二甲酸在分解过程中形成的残炭量最大。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.