Use the following spectrum (compound F) to answer questions 36-37 \'H NMR: 6 (pp

Question

Use the following spectrum (compound F) to answer questions 36-37 'H NMR: 6 (ppm) 7.6 (bs, 1H), 74 (d, 2H), 6.8 (d, 2H), 4.0 (a, 2H), 2.1 (s, 3H), 14 (t, 3H) 6 (ppm) 7.6 (bs, 1H), 7.4 (d, 2H) 36. Compound F contains a. A propyl group b. An ethyl group c. An isopropyl group d. AnCH2 group e. A CH3-O- group 37. The peak at around 7.6 ppm most likely corresponds to a. O-C-H b. O-C-O-H C. N-H d. Ph-O-H e. O-C-CH- 38. The peak at around 2.1 ppm most likely corresponds to a. Ph-CH b. Ph-OCH3 c. Ph-CH2-CH d. Ph-CH2-0H e. Ph-CH3-Cl 39. Compound F contains a. A monosubstituted benzene ring b. A 1,2-disubstituted benzene ring c. A 1,3-disubstituted benzene ring d. A 1,4-disubstituted benzene ring e. A 1,3,4-trisubstituted benzene ring

Explanation / Answer

36. Option B, an ethyl group, confirms that a quartet at 4.0 ppm for 2H and triplet at 1.4 ppm for CH3.

37. Option C, N-H

38. Option A ph-CH3, singlet at 2.1 for CH3

39. Option D, 1,4-disubstituted benzene,

Hint:two doublets (for 2H,2H) at more than/around 7 corresponds to Para disubstituted benzene

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