Chapter 7 Quiz Answers PDF

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CH235-2E ORGANIC CHEMISTRY I Quiz 7 GENEARL 1. Approximately how long is a carbon-carbon triple bond of an alkyne? a. 110 pm b. 121 pm c. 135 pm d. 156 pm ANS: B 2. How many alkynes are there with the molecular formula C6H10? a. 4 b. 5 c. 6 d. 7 ANS: D

3. What is the IUPAC name of the following compound? CH3CH2CH2CCCH(CH3)2 a. 1-isopropyl-1-pentyne b. 2-methyl-3-heptyne c. 6-methyl-4-heptyne d. isopropyl propyl ethyne ANS: B 4. What is the IUPAC name of the following compound?

a. b. c. d.

3,4-dimethyl-1-hexen-5-yne 4-ethynyl-2-vinylbutane 3-methyl-4-vinyl-1-pentyne 4-ethynyl-3-methyl-1-pentyne

ANS: A 5. What is the IUPAC name of the following compound

a. vinylcyclohexane b. allylcyclohexane c. ethynylcyclohexane d. acetylcyclohexane ANS: C 6. What is the IUPAC name of the following compound?

a. b. c. d.

(R)-4-methyl-2-hexyne (S)-4-methyl-2-hexyne (R)-3-methyl-4-hexyne (S)-3-methyl-4-hexyne

ANS: B 7. Which of the following is the strongest acid? a. propane b. cyclopropane c. propene d. propyne ANS: D 8. What is IUPAC name of the following compound?

ANS: (R)-4-chloro-2-pentyne 9. What is IUPAC name of the following compound?

ANS: 2,5-octadiyne

TYPE I 10. What is the major organic product obtained from the following reaction?

a. b. c. d.

(E) 1,2-dibromobutene (Z) 1,2-dibromobutene (E) 2,3-dibromobutene (Z) 2,3-dibromobutene

ANS: C 11. What is the major organic product obtained from the following reaction?

a. b. c. d.

2,3-dibromobutane 2,2,3,3-tetrabromobutane 2,3-dibromobutene 2,2-dibromobutane

ANS: B 12. What is the major organic product obtained from the following reaction?

a. b. c. d.

1 2 3 4

ANS: C 13. What is the major organic product obtained from the following reaction?

a. butane b. 1-butene c. cis-2-butene

d. trans-2-butene ANS: D 14. What is the best choice of reagent(s) to perform the following transformation?

a. b. c. d.

H2/Pt H2/Lindlar catalyst Na/NH3 BH3; followed by H2O2, NaOH

ANS: B 15. What is the major organic product obtained from the following reaction?

a. b. c. d.

1 2 3 4

ANS: A 16. What is the best choice of reagent(s) to perform the following transformation?

a. b. c. d.

1 mole of Br2 2 moles of Br2 1 mole of HBr 2 moles of HBr

ANS: A

TYPE II 17. What is the major organic product obtained from the following reaction?

a. b. c. d.

3,4-dibromohexane 3,3-dibromohexane (E) 3,4-dibromohexene 3,3,4,4-tetrabromohexane

ANS: B 18. What is the major organic product obtained from the following reaction?

a. b. c. d.

butanal cis-2-butene 2-butanol butanone

ANS: A

19. What is the major organic product obtained from the following reaction?

a. b. c. d.

butanal cis-2-butene 2-butanol butanone

ANS: A 20. What is the major organic product obtained from the following reaction?

a. b. c. d.

1 2 3 4

ANS: A

21. What type of intermediate s formed in the Hg2 catalyzed hydration of an alkyne?? a. an alcohol b. an enol c. a 1,2-diene d. an epoxide ANS: B

22. What is the major organic product obtained from the following reaction?

a. b. c. d.

1 2 3 4

ANS: A 23. What is the best choice of reagent(s) to perform the following transformation?

a. b. c. d.

1 mole of Br2 2 moles of Br2 1 mole of HBr 2 moles of HBr

ANS: D

24. What is the major organic product obtained from the following reaction?

ANS:

TYPE III 25. What are the major organic products obtained from the following reactions?

TYPE IV 26. What is the major organic product obtained from the following reaction?

a. b. c. d.

2-methyl-3-hexene 2-methyl-3-heptyne 2-bromo-3-methylbutane 2-methyl-2-butene

ANS: B 27. What is the major organic product obtained from the following series of reactions?

a. b. c. d.

1 2 3 4

ANS: A 28. What is the major organic product obtained from the following series of reactions?

a. b. c. d.

(Z)-2-heptene (Z)-1,5-heptene 1-heptene heptane

ANS: D 29. Outline how one might achieve the following transformations, showing reagents and the isolated intermediates in the synthesitc scheme.

ANS:...