Identify the compound with a molecular mass of 82 that has the IR spectrum shown in Fig. 14.7 and the following NMR spectrum: δ 1.90 (1H, s); δ 1.21 (9H, s).

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FIGURE 14.7 The IR spec- trum for Problem 14.4. 100 percent transmittance 80 60 40 20 2.6 2.8 3. 3.5 4 4.5 wavelength, micrometers 5 5.5 6 7 8 9 10 3800 3400 3000 2600 2200 2000 1800 1600 1400 1200 1000 wavenumber, cm-¹ 11 12 13 14 1516 800 600