核磁共振谱若不是一级图谱时,需要通过解析,计算化学位移和偶合常数。对AB、ABX_n(n=1,2,3)虽然计算不是太烦,手算也能得到结果,但计算中有平方开方等运算,仍有一定的计算量。本文提出用“几何解法”解析AB、ABX_n系谱,无需用公式计算,直接在图谱上求出化学位移和偶合常数值。 If not a nuclear magnetic resonance spectroscopy spectrum, you need to resolve, calculate chemical shifts and coupling constants. For AB, ABX_n (n = 1, 2, 3) Although the calculation is not too annoying, hand calculations can also get results, but the calculation of square root and other operations, there is still a certain amount of computation. In this paper, we propose to use “geometric solution” to resolve AB, ABX_n pedigree without chemical formula, and find the chemical shift and coupling constant directly on the map.