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Symmetric geminal bisphosphinic acids RR´C[P(CH3)(O)OH]2 - NMR and analytical studies
Phosphorus, Sulfur, and Silicon and the Related Elements ( IF 1.4 ) Pub Date : 2020-08-13 , DOI: 10.1080/10426507.2020.1798444
Leo Widler 1 , Nader Amadeu 2 , Sven Augner 3 , Christoph Janiak 2 , Gerhard Hägele 2
Affiliation  

Abstract Four bisphosphinic acids RR´C[P(CH3)(O)OH]2 are characterized by 1H, 13C{1H}, and 31P{1H} NMR data. H3 C-P-C-P-CH3 skeletons give rise to [A3X]2 spin systems. Some algebraic equations are derived for manual analysis of [A3X]2 spectra. HR NMR data for heteroaromatic substituents R in RC(H)[P(CH3)(O)OH]2 are reported. Dissociation constants and ion-specific chemical shifts δP of CH3C(OH)[P(CH3)(O)OH]2 are determined by 31P{1H} NMR controlled titrations of 2a. Graphical Abstract

中文翻译:

对称孪生双次膦酸 RR´C[P(CH3)(O)OH]2 - NMR 和分析研究

摘要 四种双膦酸 RR´C[P(CH3)(O)OH]2 通过 1H、13C{1H} 和 31P{1H} NMR 数据进行表征。H3 CPCP-CH3 骨架产生 [A3X]2 自旋系统。一些代数方程可用于 [A3X]2 光谱的手动分析。报告了 RC(H)[P(CH3)(O)OH]2 中杂芳族取代基 R 的 HR NMR 数据。CH3C(OH)[P(CH3)(O)OH]2 的解离常数和离子特异性化学位移 δP 由 2a 的 31P{1H} NMR 控制滴定确定。图形概要
更新日期:2020-08-13
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