Compound A and compound B are isomers having the molecular formula C10H12O. The mass spectrum of each compound contains an abundant peak at m/z 105. The 13C NMR spectra of compound A (Figure 17.20) and compound B (Figure 17.21) are shown. Identify these two isomers
FIGURE 17.20
The 13C NMR spectrum of compound A (C10H12O)

FIGURE 17.21
The 13C NMR spectrum of compound B (C10H12O)

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CH, CH CH2 CH3 CH CH2 Compound A C10H120 210 160 140 Chemical shift .ppm) 200 180160 140 20 100 80 60 Chemical shift (δ, ppm) CH CH CH Compound B C10H120 CH CH 200 180 160 140 120 Chemical shift (8, ppm) 100 80 60 40 20