Deck 9: Alkenes Andalkynes

Question 1

The hydroboration-oxidation to the following compound will result in:

A) An alcohol
B) An alkyl halide
C) An aldehyde
D) A ketone

Answer 1

An aldehyde

Question 2

Which of the following is a terpene?

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

Answer 2

IV

Question 3

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

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

Answer 3

The C-C triple bond in 1-pentyne is more polar than the C-C double bond in 1-pentene.

Question 4

Which alkene reacts fastest with HBr?

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

Question 5

Which method would work the best in accomplishing the following transformation?

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

Question 6

The addition of water in the presence of sulfuric acid to the following compound will result in:

A) An alkyl halide
B) An aldehyde
C) A ketone
D) An alcohol

Question 7

Give the IUPAC name for the following compound.

A) 3-sec-Butyl-1,4-nonadiyne
B) 3-Isopropyl-1,5-octadiyne
C) 3-sec-Butyl-1,4-octadiyne
D) 3-Isopropyl-1,5-nonadiyne

Question 8

Which of the statements about the properties of the carbon-carbon double bond isnot true?

A) Trans alkenes are generally more stable than cis alkenes.
B) There is restricted rotation around the carbon-carbon double bond.
C) The stability of the carbon-carbon double bond increases as the number of substituent groups increases.
D) Whenever the two groups on each end of a carbon-carbon double bond are the same, two diastereomers are possible.

Question 9

The addition of excess HBr to the following molecule will result in:

A) An alcohol
B) A geminal dihalide
C) A vicinal dihalide
D) An alkene

Question 10

What is the major product of the following reaction?

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

Question 11

What is the major product of the following reaction?

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

Question 12

Give the IUPAC name for the following compound.

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

Question 13

What is the product of the following reaction?

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

Question 14

Which of the following statements about the stereochemistry of electrophilic addition of HX to alkenes is true?

A) Hydrohalogenation occurs withsyn stereochemistry only.
B) Achiral starting materials yield an unequal mixture of two enantiomers.
C) Hydrohalogenation occurs withanti stereochemistry only.
D) Hydrohalogenation occurs withsyn andanti addition of HX.

Question 15

What is the major product of the following reaction?

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

Question 16

What is the product of the following reaction?

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

Question 17

Which of the following compounds has the highest boiling point?

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

Question 18

What is the major product of the following reaction?

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

Question 19

What is the major product of the following reaction?

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

Question 20

What is the major product of the following reaction?

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

Question 21

Predict the product of the following reaction.

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

Question 22

Which of the following statements explain why HBr is a stronger acid than HF?

A) Br^- is less stable than F^- because Br^- is less electronegative than F^-.
B) Br^- is less stable than F^- because Br^- is larger than F^-.
C) Br^- is more stable than F^- because Br^- is less electronegative than F^-.
D) Br^- is more stable than F^- because Br^- is larger than F^-.

Question 23

Which of the following is an acid commonly used it organic reactions?

A) HNO₃
B) KOH
C) H₂SO₄
D) HCl

Question 24

Which of the following is an acid commonly used it organic reactions?

A) NaOH
B) NaNH₂
C) HCl
D) KOH