制备了一系列在4-和5-位含有一系列取代基的烷基噻唑-2-羧酸酯。这些酯的溶液(大多数是新化合物)在ir C O区域显示出良好拆分的双峰,这是由旋转异构体引起的。较高的波数分量被分配到更多的极性羰基Ø,小号-反-小号-反式-rotamers和下波数分量羰Ø,小号-顺式-小号-反式-forms。注意到甲酯之间的微小但系统的差异。
An infrared study of rotational isomerism in thiazole-2-carboxylates
作者:Perry T. Kaye、G. Denis Meakins、Charles Willbe、Peter R. Williams
DOI:10.1039/p19810002335
日期:——
containing a range of substituents at the 4- and 5-positions has been prepared. Solutions of these esters (mostly new compounds) show well resolved doublets in the i.r. CO region which arise from rotationalisomers. The higher wavenumber components are assigned to the more polar carbonyl O,S-anti-s-trans-rotamers and the lower wavenumber components to the carbonyl O,S-syn-s-trans-forms. Small, but systematic
制备了一系列在4-和5-位含有一系列取代基的烷基噻唑-2-羧酸酯。这些酯的溶液(大多数是新化合物)在ir C O区域显示出良好拆分的双峰,这是由旋转异构体引起的。较高的波数分量被分配到更多的极性羰基Ø,小号-反-小号-反式-rotamers和下波数分量羰Ø,小号-顺式-小号-反式-forms。注意到甲酯之间的微小但系统的差异。