The Nature of NMR Absorptions CH3-C-0-CH3 TMS 6 A 2 0 ppm Chemical shift (8) (b) TMS CH3-C-O-CH3 200180 160 140 12010080 60 40 20 0 ppm Chemical shift(8) (a)1H NMR spectrum and(b)13C NMR spectrum of methyl acetate.Peak labeled “TMS”at far right is for calibration (a) 1H NMR spectrum and (b) 13C NMR spectrum of methyl acetate. Peak labeled “TMS” at far right is for calibration The Nature of NMR Absorptions