ABC叁自旋系統的核磁共振譜可用图解法处理,所得化学位移及偶合常数的数值为正确解。本文报告对于丙烯腈(Ⅰ)共振譜的解析,作为对图解法的进一步的检驗。所得結果表明,一个能阶图可有一个以上的解。丙烯腈的共振譜复制于图1,其中各峯的位置見表1(为計算方便計,以321.5 c/s为原点)。从原图虽不能得出小数点后的准确值,但由于 The NMR spectrum of the ABC three-spin system can be solved graphically, and the values ​​of chemical shifts and coupling constants obtained are the correct ones. This paper reports the analysis of the resonance spectrum of acrylonitrile (I) as a further test of the graphic method. The results show that there can be more than one solution for a level graph. Resonance spectra of acrylonitrile are reproduced in Figure 1, with the positions of each peak in Table 1 (originating at 321.5 c / s for computational convenience). Although the original figure can not be drawn after the exact value of the decimal point, but due