3,3-dimethyl-2-butanone
12 protons
3,3-dimethyl-2-butanone (Proton Equivalence)
9 equivalent protons = 1 signal
3 equivalent protons = 1 signal
3,3-dimethyl-2-butanone (Predicted Chemical Shifts)
CH3 groups (0.9 ppm)
CH3 group adjacent to carbonyl (2.1-2.3 ppm)