苯酚-甲醛树脂模型化合物的13C核磁共振研究

R. Pethrick, B. Thomson
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引用次数: 17

摘要

介绍了苯酚或甲酚与福尔马林酸催化反应生成的一系列模型化合物的高分辨率13C核磁共振数据。本研究制备的纯化合物可以明确地识别与邻位、邻对和对对连接的部分相关的特征,从而可以分析典型树脂中的序列结构。为了帮助谱的分配,将用简单可加性关系预测的谱与实验观测到的位移进行了比较。理论与实验的差异随结构的不同而有系统的变化,并给出了不同特征结构的平均修正系数。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
13C Nuclear Magnetic Resonance Studies of Phenol‐Formaldehyde Resins 1 ‐ Model Compounds
High resolution 13C n.m.r. data are presented for a series of model compounds generated by the acid catalysed reaction of either phenol or cresol with formalin. The pure compounds prepared for this study allow unambiguous identification of features associated with ortho-ortho, ortho-para and para-para linked moieties, and hence allow analysis of the sequence structure in the typical resin. To aid assignment of the spectra a comparison is made between the predictions of the spectra using simple additivity relationships and the experimentally observed shifts. It is found that the differences between theory and experiment vary systematically with structure, and averaged correction factors are presented for various characteristic structures.
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