Example 1H NMR spectrum (1-dimensional) of ethyl acetate plotted as signal intensity vs. chemical shift. There are three different types of H atoms in ethyl acetate regarding NMR. The hydrogens (H) on the CH3COO- (acetate) group are not coupling with the other H atoms and appear as a singlet, but the -CH2- and -CH3 hydrogens of the ethyl group (-CH2CH3) are coupling with each other, resulting in a quartet and triplet respectively.