Chapter FRP, Problem 36P

Compound X $\left(C_5{H}_{10}O\right)$ shows a strong IR absorption band near $1710c{m}^{-1}$. The broadband proton ${}^{13}C$ NMR spectrum of X is shown in Fig. 2. Propose a structure for X.

Figure 2 The broadband proton-decoupled ${}^{13}C$ NMR spectrum of compound X (Problem 36). Information from the DEPT ${}^{13}C$ NMR spectra is given near each peak.