For each of the following sets of data, provide the correct ester structure and correlate each structure with the NMR data. Place the answers directly on this paper.
a) C7H14O2
1H NMR: d 3.95 (s, 3H), 2.25 (t, 2H), 1.55 (q, 2H), 1.42 (nonet, 1H), 0.89 (d, 6H)
b) C11H14O3
1H NMR: d 7.92 (d, 2H), 7.05 (d, 2H), 6.90 (s, 1H), 4.30 (t, 2H), 1.70 (quint, 2H), 1.39 (sextet, 2H), 0.88 (t, 3H)
IR shows a broad, intense absorbance at 3268 cm-1
c) C10H12O2
1H NMR: d 7.2 (d, 2H), 6.9 (d, 2H), 2.4 (q, 2H), 2.3 (s, 3H), 1.2 (t, 3H)