5.1 1D 1H NMR Spectra Dictional 1/2 Natural abundance=99.985% CH3(C=OCH2CH3 CH3 Magnetogyric ratio= 26 7522 in CDCl3 Receptivity vs. H=1.00 Receptivity vS 3C=5.67x10 Shift range =-25 to +12 ppm CH2 Shift reference: (CH3)4Si TMSI TMS √ chemical shift v spin-spin coupling 化学位移高 >低 integral area 频率高 一>低 磁场弱 >强 THNMR AN5.1 1D 1H NMR Spectra THNMR YAN  chemical shift  spin-spin coupling 化学位移 高——————————  integral area >低 频率 高——————————>低 磁场 弱——————————>强 Dictionary: 1H Spin = 1/2 Natural abundance = 99.985% Magnetogyric ratio = 26.7522 Receptivity vs. 1H = 1.00 Receptivity vs.13C = 5.67x103 Shift range = -25 to +12 ppm Shift reference: (CH3 )4Si [TMS]