新噻唑衍生物中C- o、C—N和C- h—Cl氢键的1H NMR证据

Revista Latinoamericana de Química Pub Date : 2002-10-01 DOI:10.3987/COM-02-9478

F. Viesca, M. R. Gómez, Martha I Berros

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引用次数: 13

摘要

通过对15个新聚取代4-芳基和2,4-二芳基噻唑的1h NMR谱的化学位移差异的比较研究，我们建立了两组旋转体。由于分子内弱氢键，一些分子内存在顺磁位移，这被“无限稀释”实验、单晶x射线研究、NOESY和HMBC实验证实。

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1H NMR evidence of C-O, C--N and C-H--Cl hydrogen bonds in new thiazole derivatives

A comparative study of the chemical shift differences observed in the 1 H NMR spectra of a series of fifteen new polysubstituted 4-aryl- and 2,4-diaryl thiazoles permitted us to establish two groups of rotamers. Some present paramagnetic shifts due to intramolecular weak hydrogen bonding and this was confirmed by experiments "at infinite dilution", single crystal X-Ray studies, NOESY and HMBC experiments.

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Revista Latinoamericana de Química

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