2. Propose a structure for a compound with the following formula that show only one peak in their 'H NMR spectra: a. CH12 b. C₂H10 c. C4H8O₂ 3. How many 'H NMR signals would appear in the 1H NMR spectrum of each compounds? CHS CHS CH2CH3 CH3 CH3 CH 4. Match each of the following 1H NMR absorptions to the compounds below, each of which has a one- signal spectrum: 50.04, 0.90, 1.42, 2.25, 7.3ppm H&C. CH CHS (HCS-Si(CHals 00x H₂C CH C(CH3) CH₂