ACS Review 9 Alkynes

ACS Review 9 Alkynes - ACS Review Alkynes 1. What is the...

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ACS Review Alkynes 1. What is the IUPAC name of the following compound? A. 2-methyl-5-propyl-3-heptyne B. 1-isopropyl-3-propyl-1-pentyne C. 5-ethyl-2-methyl-3-octyne D. 4-ethyl-7-methyl-5-octyne 2. Which one of the following describes the C(2)-C(3) sigma bond in the structure below? A. sp-sp B. sp 2 -sp 2 C. sp 3 -sp 3 D. 2p-2p 3. Select the best base to quantitatively remove a proton from acetylene. A. NaNH 2 B. NH 3 C. NaOH D. NaOCH 2 CH 3 4. Arrange the following in order of decreasing base strength (strongest base first). A. IV > III > II > I B. II > III > I > IV C. I > II > IV > III D. II > III > IV > I 5. Predict the major product(s) in the reactions below. A. 1-nonyne B. 2-nonyne C. cis -2-nonene D. trans -2-nonene 6. Which one of the following alkynes gives a single ketone in the acid-catalyzed hydration of each? A. 2-decyne B. 3-decyne C. 4-decyne D. 5-decyne 7. Which sequence of reactions works best in synthesizing cis -3-nonene?
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A) (1) 1-butyne, NaNH 2 (2) 1-bromopentane (3) Na, NH 3 B) (1) 1-butyne, NaNH 2 (2) 1-bromopentane (3) H 2 , Lindlar Pd C) (1) 1-pentyne, NaNH 2 (2) 1-bromobutane (3) H 2 O, H 2 SO 4 /HgSO 4 D) (1) 1-pentyne, NaNH 2 (2) 1-bromobutane (3) 2 HCl (4) NaNH 2 A. A B. B C. C D. D 8. Which sequence of reactions below works best in carrying out the following conversion? A) (1) HBr (2) excess NaNH 2 B) (1) Br 2 (2) excess NaNH 2 C) (1) Br 2 , H 2 O (2) excess NaNH 2 D) (1) H 2 O, H 2 SO 4 (cat.) (2) excess NaNH 2 A. A B. B C. C D. D 9. Which of the following is the enol intermediate in the acid-catalyzed addition of water to propyne?
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This note was uploaded on 12/17/2010 for the course CHEM 101 taught by Professor Silva during the Spring '08 term at Binghamton University.

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ACS Review 9 Alkynes - ACS Review Alkynes 1. What is the...

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