6.The IR spectrum of a compound shows a strong absorbance peak at 1720 cmWhat C)NH D)C=O E)CN 7.A hydrocarbon with the molecular formula CH12 exhibits the following spectroscopic data:H NMR=1.3(m.2H).1.7(m,4 H).2.2(m,4H),and 4.8(quin,J=3Hz. 2H)ppm:C NMR:8=26.8,28.7,35.7,106.9,and 149.7 ppm.The IR spectrum has key absorbances at 3072,2950,and 1649 cm Hydrogenation of the compound furnishes a product with the molecular formula CH4 Which structure is consistent with this data? A) C) D 8.How many units of unsaturation are indicated by the following molecular formula: C1HisBrl2O2N Page3Page 3 6. The IR spectrum of a compound shows a strong absorbance peak at 1720 cm–1. What functional group is indicated? A) OH B) C=C C) NH D) C=O E) CN Ans: D 7. A hydrocarbon with the molecular formula C7H12 exhibits the following spectroscopic data: 1 H NMR δ = 1.3 (m, 2H), 1.7 (m, 4 H), 2.2 (m, 4H), and 4.8 (quin, J = 3 Hz, 2H) ppm; 13C NMR: δ = 26.8, 28.7, 35.7, 106.9, and 149.7 ppm. The IR spectrum has key absorbances at 3072, 2950, and 1649 cm–1. Hydrogenation of the compound furnishes a product with the molecular formula C7H14. Which structure is consistent with this data? A) B) C) D) E) none of the above Ans: D 8. How many units of unsaturation are indicated by the following molecular formula: C17H18BrI2O2N ? A) 0 B) 2 C) 6 D) 8 E) 10 Ans: D