Deck 19: More About Amines Reactions of Heterocyclic Compounds

Question 1

Which of the following heterocyclic amines is aziridine?

A)
B)
C)
D)
E)

Answer 1

Question 2

What is the correct name for the following compound?

A) N-ethyl-1-methylpiperidine
B) N-ethyl-3-methylpiperidine
C) N-ethyl-1-methylpyrrolidine
D) N-ethyl-3-methylpyrrolidine
E) N-ethyl-3-methylazetidine

Answer 2

N-ethyl-3-methylpiperidine

Question 3

What is the correct order of decreasing delocalization energies of the following aromatic rings?

A) 1>2>3>4>5
B) 2>1>3>5>4
C) 4>3>5>2>1
D) 1>2>5>4>3
E) 1>5>3>4>2

Answer 3

1>2>5>4>3

Question 4

Which of the following heterocycles is pyrrole?

A) pyridine
B) thiophene
C) furan
D) pyrrole
E) imidazole

Question 5

Which of the following has the lowest pK_a?

A)
B)
C)
D)
E)

Question 6

Which compound is the product of the following reaction?

A)
B)
C)
D)
E)

Question 7

Pyridine undergoes electrophilic aromatic substitution at the ____________.

A) 1-position
B) 2-position
C) 3-position
D) 4-position
E) 2- and 4-positions

Question 8

Pyridine undergoes nucleophilic aromatic substitution at the___________

A)1-position
B) 2-position
C) 3-position
D) 4-position
E)2- and 4-positions

Question 9

Which set of reagents will accomplish the following synthesis?

A) 1.Br₂/FeBr₃; 2. PhLi
B) 1.HBr; 2. Ph₂CuLi
C) 1.Br₂, heat; 2. PhLi
D) 1.Br₂/FeBr₃; 2. Ph₂CuLi
E) Ph-Br/FeBr₃

Question 10

Which of the following heterocyclic amines is pyrimidine?

A)
B)
C)
D)
E)

Question 11

Which of the following statements is not true?

A) Benzene and substituted benzenes are nucleophiles and undergo electrophilic aromatic substitution.
B) Pyridine is much less nucleophilic than benzene and undergoes nucleophilic aromatic substitution.
C) Pyrrole, furan, and thiophene are more nucleophilic than benzene and only undergo electrophilic aromatic substitution.
D) Highly deactivated, substituted benzene rings undergo nucleophilic aromatic substitution.
E) Pyridine fails to undergo electrophilic aromatic substitution.