Deck 18: Benzene and Aromatic Compounds

Question 1

Which of the following compounds is not aromatic?

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

Answer 1

I

Question 2

Which of the following compounds is aromatic?

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

Answer 2

IV

Question 3

Why is the following compound not aromatic?

A) It is not cyclic.
B) The pi electron system is not continuous.
C) It has 4n+2 pi electrons.
D) It has 4n pi electrons.

Answer 3

The pi electron system is not continuous.

Question 4

What is the name of the following compound?

A) 5-Methyltoluene
B) 2,6-Dimethylbenzene
C) Anisole
D) 1,3-Dimethylbenzene

Question 5

Which of the following compounds is aromatic?

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

Question 6

Which of the following statements about the molecular orbital (MO) theory is true?

A) Ap* antibonding molecular orbital is higher in energy than the two atomicp orbitals from which it is formed.
B) When twop orbitals of similar phase overlap side-by-side, a p* antibonding molecular orbital is formed.
C) Ap bonding molecular orbital is higher in energy than the two atomicp orbitals from which it is formed.
D) When twop orbitals of opposite phase overlap side-by-side, a p bonding molecular orbital is formed.

Question 7

What is the correct assignment of the number of signals in the ¹³C NMR spectra of the following disubstituted benzene derivatives?

A) I = 6 signals; II = 6 signals; III = 6 signals
B) I = 3 signals; II = 4 signals; III = 2 signals
C) I = 3 signals; II = 4 signals; III = 3 signals
D) I = 3 signals; II = 3 signals; III = 2 signals

Question 8

Which of the following compounds is not aromatic?

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

Question 9

What is the correct assignment of the names of the following fused aromatic compounds?

A) I = naphthalene; II = phenanthrene; III = anthracene
B) I = naphthalene; II = anthracene; III = phenanthrene
C) I = anthracene; II = naphthalene; III = phenanthrene
D) I = naphthalene; II = phenanthrene; III = benzo[a]pyrene

Question 10

What is the IUPAC name of the following compound?

A) 2,5-Dichloroaminobenzene
B) 2,5-Dichloroaniline
C) 2,5-Dichloroanisole
D) 3,6-Dichloroaniline