化学位移规律：烯烃 δc=100-150(成对出现) 端碳δcH2≈110；邻碳上取代基增多δc越大： 25.4 CH3 CH3 H3C CH2 C-CH2 30.4 CHs 52.2 143.7 114.4 24.7 29.9 CH3 53.5 CH3 H3C CH2-CH-CH3 CH3 84.2153.2 2024/9/202024/9/20 化学位移规律：烯烃 C=100-150（成对出现） 端碳=CH2  110；邻碳上取代基增多C越大： C C C CH2 C CH2 CH3 CH3 CH3 H3C C CH2 CH CH3 CH3 CH3 CH3 H3C 25.4 30.4 52.2 24.7 29.9 53.5 143.7 114.4 C O H H2C CH3 C O H H2C CH3 84.2 153.2