Deck 10: Oxidation and Reduction

Question 1

Which of the following statements about the reduction of epoxides with LiA1H₄ is true?

A) The nucleophile is a hydride (H^-).
B) The reaction follows S_N1 mechanism.
C) In unsymmetrical epoxides, nucleophilic attack of H^- occurs at the more substituted carbon atom.
D) The nucleophile, H^-, is a weak nucleophile.

Answer 1

The nucleophile is a hydride (H^-).

Question 2

Which of the following explains why heats of hydrogenation cannot be used to determine the relative stability of compounds A and B below?

A) CompoundA hasE configuration while compoundB has noE/Z configuration.
B) CompoundA is trisubstituted while compoundB is monosubstituted.
C) Hydrogenation ofA andB give different alkanes.
D) Both compoundsA andB have noE/Z configurations.

Answer 2

Hydrogenation ofA andB give different alkanes.

Question 3

What is the product of the following reaction?

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

Answer 3

II

Question 4

What is (are) the product(s) of the following reaction?

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

Question 5

Which of the following statements about oxidation and reduction isnot true?

A) Reduction results in an increase in the number of C-Z bonds.
B) Oxidation results in a decrease in the number of C-H bonds.
C) The conversion of an alkene to an alkane is reduction.
D) The conversion of an alkyne to an alkene is reduction.

Question 6

What is the major product of the following reaction?

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