Question 1

Complete the following statement: 'For a molecule to be aromatic it must ….' Please select all that apply.

Accepted Answer

A)   have (4n + 2)  sigma-electrons.
B)   have 6 pi-electrons.
C)   possess uninterrupted (continuous)  conjugation.
D)   be cyclic.
E)   be planar.

Question 2

Match the following electronic effects to the substituents:
--CH=CH-CHO

Accepted Answer

A)   +I effect, no M effect
B)   +I effect, +M effect
C)   +I effect, -M effect
D)   -I effect, +M effect
E)   -I effect, -M effect

Question 3

From the following sequence of reactions, match the reagents to steps 1-4:
 3 A)  Reagents 3 B)  Reagents 4 C)  Reagents B D)  Reagents A" class="answers-bank-image d-inline" rel="preload" >
-i-PrCOCl, AlCl3

Accepted Answer

A)   Reagents 3
B)   Reagents 4
C)   Reagents B
D)   Reagents A

Question 4

From the following reactions, A-E, pick out those which give isopropylbenzene as the major product. Please select all that apply.

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   E

Question 5

For the following reaction sequence, match the products, A-C, to the given structures.
 
-

Accepted Answer

A)   Product B
B)   Product A
C)   Product C

Question 6

Which of the following compounds, A-E, exhibits the greatest resonance stabilisation?

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   E

Question 7

For the following reaction sequence, match the products, A-C, to the given structures.
 
-

Accepted Answer

A)   Product B
B)   Product A
C)   Product C

Question 8

Which of the following statements are true? Please select all that apply.

Accepted Answer

A)   All aromatic molecules have the same amount of resonance stabilisation.
B)   Aromatic molecules are more stable than conjugated molecules.
C)   Conjugated molecules can be either cyclic or acyclic.
D)   All aromatic molecules have 4n pi-electrons.
E)   Conjugated molecules are less stable than anti-aromatic molecules. B, C

Question 9

From the following sequence of reactions, match the reagents to steps 1-4:
 4, H2O A)  Step 2 B)  Step 4 C)  Step 3 D)  Step 1" class="answers-bank-image d-inline" rel="preload" >
-KMnO4, H2O

Accepted Answer

A)   Step 2
B)   Step 4
C)   Step 3
D)   Step 1

Question 10

From the following species, A-E, pick out those which have uninterrupted (continuous)  conjugation. Please select all that apply.

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   E A, C, E

Question 11

From the following sequence of reactions, match the reagents to steps 1-4:
 2, hv A)  Step 2 B)  Step 4 C)  Step 3 D)  Step 1" class="answers-bank-image d-inline" rel="preload" >
-excess Br2, hv

Accepted Answer

A)   Step 2
B)   Step 4
C)   Step 3
D)   Step 1

Question 12

From the following sequence of reactions, match the reagents to steps 1-4:
 
-MeOH, HCl

Accepted Answer

A)   Step 2
B)   Step 4
C)   Step 3
D)   Step 1

Question 13

From the following reaction, pick out the major product:

Accepted Answer

A)   A
B)   B
C)   C
D)   D

Question 14

From the following sequence of reactions, match the reagents to steps 1-4:
 3 A)  Reagents 3 B)  Reagents 4 C)  Reagents B D)  Reagents A" class="answers-bank-image d-inline" rel="preload" >
-t-BuCl, AlCl3

Accepted Answer

A)   Reagents 3
B)   Reagents 4
C)   Reagents B
D)   Reagents A C

Question 15

For the following reaction sequence, match the products, A-C, to the given structures.
 
-

Accepted Answer

A)   Product B
B)   Product A
C)   Product C

Question 16

Place the following types of species in order of (electronic)  stability, with 1 being the most stable and 5 the least stable:

Accepted Answer

A)   Aromatic molecule
B)   Radical
C)   Anti-aromatic molecule
D)   Alkene
E)   Conjugated molecule

Question 17

For the following reaction, pick out the major product:

Accepted Answer

A)   A
B)   B
C)   C
D)   D

Question 18

How many bonding molecular orbitals are present in cyclobutadiene?

Accepted Answer

A)   0
B)   1
C)   2
D)   3
E)   4

Question 19

For the following species, A-E, pick out those which are aromatic. Please select all that apply.

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   E

Question 20

From the following molecules, A-E, pick out the one which is most reactive towards aromatic bromination:

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   E

Exam 22: Benzene and Other Aromatic Compounds: Electrophilic Substitution Reactions

Complete the following statement: 'For a molecule to be aromatic it must ….' Please select all that apply.

Correct AnswerverifiedShow Answer

Match the following electronic effects to the substituents: --CH=CH-CHO

Correct AnswerverifiedShow Answer

From the following sequence of reactions, match the reagents to steps 1-4: -i-PrCOCl, AlCl3

Correct AnswerverifiedShow Answer

From the following reactions, A-E, pick out those which give isopropylbenzene as the major product. Please select all that apply.

Correct AnswerverifiedShow Answer

For the following reaction sequence, match the products, A-C, to the given structures. -

Correct AnswerverifiedShow Answer

Which of the following compounds, A-E, exhibits the greatest resonance stabilisation?

Correct AnswerverifiedShow Answer

For the following reaction sequence, match the products, A-C, to the given structures. -

Correct AnswerverifiedShow Answer

Which of the following statements are true? Please select all that apply.

Correct AnswerverifiedB, C

From the following sequence of reactions, match the reagents to steps 1-4: -KMnO4, H2O

Correct AnswerverifiedShow Answer

From the following species, A-E, pick out those which have uninterrupted (continuous) conjugation. Please select all that apply.

Correct AnswerverifiedA, C, E

From the following sequence of reactions, match the reagents to steps 1-4: -excess Br2, hv

Correct AnswerverifiedShow Answer

From the following sequence of reactions, match the reagents to steps 1-4: -MeOH, HCl

Correct AnswerverifiedShow Answer

From the following reaction, pick out the major product:

Correct AnswerverifiedShow Answer

From the following sequence of reactions, match the reagents to steps 1-4: -t-BuCl, AlCl3

Correct AnswerverifiedC

For the following reaction sequence, match the products, A-C, to the given structures. -

Correct AnswerverifiedShow Answer

Place the following types of species in order of (electronic) stability, with 1 being the most stable and 5 the least stable:

Correct AnswerverifiedShow Answer

For the following reaction, pick out the major product:

Correct AnswerverifiedShow Answer

How many bonding molecular orbitals are present in cyclobutadiene?

Correct AnswerverifiedShow Answer

For the following species, A-E, pick out those which are aromatic. Please select all that apply.

Correct AnswerverifiedShow Answer

From the following molecules, A-E, pick out the one which is most reactive towards aromatic bromination:

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

From the following sequence of reactions, match the reagents to steps 1-4: -i-PrCOCl, AlCl₃

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
B, C

From the following sequence of reactions, match the reagents to steps 1-4: -KMnO₄, H₂O

Correct Answer
verified

Correct Answer
verified
A, C, E

From the following sequence of reactions, match the reagents to steps 1-4: -excess Br₂, hv

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

From the following sequence of reactions, match the reagents to steps 1-4: -t-BuCl, AlCl₃

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified