Structure and Intramolecular Mobility of Some Derivatives of Bis(thio)phosphorylated Amides in CCL4, CD2CL2, and CD3CN Solutions

F. Karataeva, I. Rakhmatullin, N. F. Galiullina, V. Klochkov
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引用次数: 0

Abstract

The structure and intramolecular mobility of some derivatives of bis(thio)phosphorylated amides in CCl4, CD2Cl2, and CD3CN solutions were examined by 1H and 31P NMR spectroscopy. A comparative analysis of the temperature-dependent 1H and 31P NMR spectra of the studied compounds with symmetric and asymmetric substitution at phosphorus atoms was carried out. Various intramolecular processes were identified – rotation around C-N bonds, conformational transformations of molecules, tautomerism, and phosphorylotropic rearrangement with the formation of various conformational forms. It was shown that a dynamic equilibrium of several forms is reached, with the amide (phosphazo-) form having a clear advantage.
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双(硫)磷酸化酰胺衍生物在CCL4、CD2CL2和CD3CN溶液中的结构和分子内迁移率
用1H和31P核磁共振谱研究了双硫代磷酸化酰胺衍生物在CCl4、CD2Cl2和CD3CN溶液中的结构和分子内迁移率。对磷原子对称取代和不对称取代化合物的1H和31P谱进行了温度依赖性的比较分析。各种分子内过程被确定-围绕C-N键旋转,分子的构象转化,互变异构,以及与各种构象形式形成的亲磷重排。结果表明,该反应可达到多种形式的动态平衡,其中酰胺(磷-)形式具有明显的优势。
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0.70
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审稿时长
17 weeks
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