butyraldehyde
8 protons
butyraldehyde (Proton Equivalence)
3 equivalent protons = 1 signal
2 equivalent protons = 1 signal
2 equivalent proton = 1 signal
1 equivalent proton = 1 signal
butyraldehyde (Predicted Chemical Shifts)
CH3 group (0.9 ppm)
CH2 group (1.2-1.4 ppm)
CH2 group adjacent to carbonyl (2.2-2.6 ppm)
aldehyde CH (9.5-10.1 ppm)