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Give the IUPAC name for the following compound. Give the IUPAC name for the following compound. A) 4,4-Diethyl-1-octyne B) 4,4-Dipropyl-1-heptyne C) 4,4-Dipropyl-6-heptyne D) 4,4-Diethyl-6-octyne


A) 4,4-Diethyl-1-octyne
B) 4,4-Dipropyl-1-heptyne
C) 4,4-Dipropyl-6-heptyne
D) 4,4-Diethyl-6-octyne

Correct Answer

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What is the major organic product of the following reaction? What is the major organic product of the following reaction? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

Correct Answer

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Which of the indicated hydrogen in the following compounds is the least acidic? Which of the indicated hydrogen in the following compounds is the least acidic? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

Correct Answer

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Give the IUPAC name for the following compound. Give the IUPAC name for the following compound. A) 6,6-Dimethyl-3-octyne B) 3,3-Dimethyl-3-octyne C) 3,3-Dimethy-5-octyne D) 6-Ethyl-6-methyl-3-heptyne


A) 6,6-Dimethyl-3-octyne
B) 3,3-Dimethyl-3-octyne
C) 3,3-Dimethy-5-octyne
D) 6-Ethyl-6-methyl-3-heptyne

Correct Answer

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In the addition of HBr to 1-butyne,the nucleophile in the first step of the mechanism is


A) the Csp-H1s bond of 1-butyne.
B) the C-C triple bond of 1-butyne.
C) the H atom in HBr.
D) the Br ion.

Correct Answer

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Which of the following statements about the reactions of alkynes is not true?


A) Alkynes contain easily broken p bonds.
B) Alkynes undergo addition reactions.
C) When alkynes undergo two sequential addition reactions,four new s bonds are formed.
D) When alkynes undergo two sequential addition reactions,two new s bonds and a p bond are formed.

Correct Answer

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What is the major product of the following reaction sequence? What is the major product of the following reaction sequence? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

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What is the product of the following reaction? What is the product of the following reaction? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

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Which of the following statements about alkynes is not true?


A) Alkynes undergo many addition reactions.
B) Alkynes are more polarizable than alkenes.
C) Both p bonds of a C-C triple bond are weaker than a C-C s bond.
D) The electrons in the p bonds of alkynes are more tightly held than those of alkenes.

Correct Answer

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Give the IUPAC name for the following compound. Give the IUPAC name for the following compound. A) 4-Chloro-4-methyl-2-heptyne B) 3-Chloro-3-methyl-4-heptyne C) 3-Chloro-3-methyl-4-hexyne D) 4-Chloro-4-methyl-2-hexyne


A) 4-Chloro-4-methyl-2-heptyne
B) 3-Chloro-3-methyl-4-heptyne
C) 3-Chloro-3-methyl-4-hexyne
D) 4-Chloro-4-methyl-2-hexyne

Correct Answer

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Which method would work the best in accomplishing the following transformation? Which method would work the best in accomplishing the following transformation? A) [1] HBr; [2] 2eq.NaNH<sub>2</sub> B) [1] Br<sub>2</sub>; [2] 2eq.NaNH<sub>2</sub> C) [1] Br<sub>2</sub>,H<sub>2</sub>O; [2] NaNH<sub>2</sub> D) [1]BH<sub>3</sub>,THF; [2] H<sub>2</sub>O<sub>2</sub>,NaOH; [3] NaNH<sub>2</sub>


A) [1] HBr; [2] 2eq.NaNH2
B) [1] Br2; [2] 2eq.NaNH2
C) [1] Br2,H2O; [2] NaNH2
D) [1]BH3,THF; [2] H2O2,NaOH; [3] NaNH2

Correct Answer

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What is the major organic product of the following reaction? What is the major organic product of the following reaction? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

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Rank the following compounds in order of decreasing basicity,putting the most basic first. Rank the following compounds in order of decreasing basicity,putting the most basic first. A) I > II > III B) III > II > I C) III > I > II D) II > III > I


A) I > II > III
B) III > II > I
C) III > I > II
D) II > III > I

Correct Answer

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Give the IUPAC name for the following compound. Give the IUPAC name for the following compound. A) R-4-bromo-1-pentyne B) S-4-bromo-1-pentyne C) R-3-bromo-5-pentyne D) S-3-bromo-5-pentyne


A) R-4-bromo-1-pentyne
B) S-4-bromo-1-pentyne
C) R-3-bromo-5-pentyne
D) S-3-bromo-5-pentyne

Correct Answer

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Which of the following explains why 1-pentyne has a slightly higher boiling point than 1-pentene?


A) 1-Pentyne has more carbons than 1-pentene.
B) 1-Pentyne has more carbons per hydrogen than 1-pentene.
C) 1-Pentyne is linear while 1-pentene is trigonal planar.
D) The C-C triple bond in 1-pentyne is more polar than the C-C double bond in 1-pentene.

Correct Answer

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Which of the following statements about tautomers is true?


A) Tautomers differ in the position of a single bond and a hydrogen atom.
B) Tautomers differ in the position of a double bond and a carbon atom.
C) Tautomers differ in the position of a double bond and a hydrogen atom.
D) Tautomers differ in the position of a single bond and a carbon atom.

Correct Answer

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Give the IUPAC name for the following compound. Give the IUPAC name for the following compound. A) 4-Methyl-4-penten-1-yne B) 2-Methyl-2-hexen-5-yne C) 5-Methyl-4-hexen-1-yne D) 2-Methyl-2-penten-4-yne


A) 4-Methyl-4-penten-1-yne
B) 2-Methyl-2-hexen-5-yne
C) 5-Methyl-4-hexen-1-yne
D) 2-Methyl-2-penten-4-yne

Correct Answer

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What is the starting material in the following reaction? What is the starting material in the following reaction? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

Correct Answer

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Which of the following compounds can be an enol tautomer of 1,3-cyclohexandione? Which of the following compounds can be an enol tautomer of 1,3-cyclohexandione? A) Only I and II B) Only I and III C) Only II and III D) I,II,and III


A) Only I and II
B) Only I and III
C) Only II and III
D) I,II,and III

Correct Answer

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What is the major organic product of the following reaction? What is the major organic product of the following reaction? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

Correct Answer

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