Problem 1. The IR and 'H-NMR spectra of an unknown compound with the formula C.H.O. are shown below. Interpret the IR spectrum, explaining which peaks indicate which functional groups. Write below the possible structure of the compound? Problem 2. The IR and 'H-NMR spectra of an unknown compound with the formula C.H. are shown below. Interpret the IR spectrum, explaining which peaks indicate which functional groups. Write below the possible structure of the compound? 3968 1750 gam Problem 3. The 'H-NMR spectra of an unknown compound with the formula C11H 402 are shown below, while it contains C=0 absorption in its IR spectrum. Interpret the IR and 'H- NMR results and write below the possible structure of the compound? singlet Integration = 5 2 2 23 triplet quartet triplet riplet le il the 10 5 O ppm