The 13C NMR spectra of some 1- and 2-substituted perimidines and perimidinium salts are discussed and assigned. Although the spectra of most of the 2-substituted perimidines are comparatively simple, several examples display 13C and 1H spectral characteristics indicative of inhibition of prototropic tautomerism.
讨论并归属了一些1-和2-取代
嘧啶及其
嘧啶盐的13C NMR谱。虽然大部分2-取代
嘧啶的谱图相对简单,但有多个例子显示出13C和1H谱特征,表明质子互变异构受到抑制。