Question 1

The correct name for the compound shown below is:

Accepted Answer

A)  3,4-Dibromoaniline 
B)  2,4-Dibromoaniline 
C)  2,5-Dibromoaniline 
D)  3,6-Dibromoaniline 
E)  2,6-Dibromoaniline 
A)  3,4-Dibromoaniline 
B)  2,4-Dibromoaniline 
C)  2,5-Dibromoaniline 
D)  3,6-Dibromoaniline 
E)  2,6-Dibromoaniline

Question 2

On the basis of molecular orbital theory and Hückel's rule,which of these compounds should be aromatic?

Accepted Answer

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

Question 3

Xylene is the name commonly assigned to:

Accepted Answer

A)  Hydroxybenzene 
B)  Aminobenzene 
C)  Dimethylbenzene 
D)  Ethylbenzene 
E)  Methoxybenzene 
A)  Hydroxybenzene 
B)  Aminobenzene 
C)  Dimethylbenzene 
D)  Ethylbenzene 
E)  Methoxybenzene

Question 4

In the molecular orbital model of benzene,how many pi-electrons are delocalized about the ring?

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  5 
E)  6 
A)  2 
B)  3 
C)  4 
D)  5 
E)  6

Question 5

In the molecular orbital model of the cyclopentadienyl cation,how many  $\pi$-bonding molecular orbitals are there?

Accepted Answer

A)  6 
B)  5 
C)  4 
D)  3 
E)  2 
A)  6 
B)  5 
C)  4 
D)  3 
E)  2

Question 6

Which compound would you NOT expect to be aromatic?

Accepted Answer

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

Question 7

Aniline is the name commonly assigned to:

Accepted Answer

A)  Hydroxybenzene 
B)  Aminobenzene 
C)  Methylbenzene 
D)  Ethylbenzene 
E)  Methoxybenzene 
A)  Hydroxybenzene 
B)  Aminobenzene 
C)  Methylbenzene 
D)  Ethylbenzene 
E)  Methoxybenzene

Question 8

How many equivalent resonance structures can be written for the cyclopentadienyl anion?

Accepted Answer

A)  3 
B)  4 
C)  5 
D)  6 
E)  7 
A)  3 
B)  4 
C)  5 
D)  6 
E)  7

Question 9

Which dichlorobenzene might theoretically yield three mononitro products?

Accepted Answer

A)  o-Dichlorobenzene 
B)  m-Dichlorobenzene 
C)  p-Dichlorobenzene 
D)  None of these 
E)  All of these 
A)  o-Dichlorobenzene 
B)  m-Dichlorobenzene 
C)  p-Dichlorobenzene 
D)  None of these 
E)  All of these

Question 10

The difference between the amount of heat actually released upon hydrogenation of benzene and that calculated on the basis of the Kekule structure is called the ____________________ of benzene.

Accepted Answer

The answer of The difference between the amount of heat...

Question 11

In the molecular orbital model of benzene,how many pi-electrons are in bonding molecular orbitals?

Accepted Answer

A)  6 
B)  5 
C)  4 
D)  3 
E)  2 
A)  6 
B)  5 
C)  4 
D)  3 
E)  2

Question 12

Why would 1,3-cyclohexadiene undergo dehydrogenation readily?

Accepted Answer

A)  It is easily reduced. 
B)  Hydrogen is a small molecule. 
C)  1,3-Cyclohexadiene has no resonance energy. 
D)  It would gain considerable stability by becoming benzene. 
E)  It would not undergo dehydrogenation. 
A)  It is easily reduced. 
B)  Hydrogen is a small molecule. 
C)  1,3-Cyclohexadiene has no resonance energy. 
D)  It would gain considerable stability by becoming benzene. 
E)  It would not undergo dehydrogenation.

Question 13

Which reagent(s)would serve as the basis for a simple chemical test that would distinguish between ethylbenzene and vinylcyclohexane?

Accepted Answer

A)  H2CrO4 
B)  LAH 
C)  NaBH4,H2O 
D)  KMnO4,OH - ,H2O 
E)  Two of the above 
A)  H2CrO4 
B)  LAH 
C)  NaBH4,H2O 
D)  KMnO4,OH - ,H2O 
E)  Two of the above

Question 14

Which of the following is NOT true of benzene?

Accepted Answer

A)  Benzene tends to undergo substitution rather than addition reactions,even though it has a high index of hydrogen deficiency. 
B)  All of the hydrogen atoms of benzene are equivalent. 
C)  The carbon-carbon bonds of benzene are alternately short and long around the ring. 
D)  Only one o-dichlorobenzene has ever been found. 
E)  Benzene is more stable than the hypothetical compound 1,3,5-cyclohexatriene. 
A)  Benzene tends to undergo substitution rather than addition reactions,even though it has a high index of hydrogen deficiency. 
B)  All of the hydrogen atoms of benzene are equivalent. 
C)  The carbon-carbon bonds of benzene are alternately short and long around the ring. 
D)  Only one o-dichlorobenzene has ever been found. 
E)  Benzene is more stable than the hypothetical compound 1,3,5-cyclohexatriene.

Question 15

How many different dibromophenols are possible?

Accepted Answer

A)  8 
B)  7 
C)  6 
D)  5 
E)  4 
A)  8 
B)  7 
C)  6 
D)  5 
E)  4

Question 16

Which of the following statements regarding the cyclopentadienyl cation is correct?

Accepted Answer

A)  It is aromatic. 
B)  It is not aromatic. 
C)  It obeys Hückel's rule. 
D)  It undergoes reactions characteristic of benzene. 
E)  It has a closed shell of 6 pi-electrons. 
A)  It is aromatic. 
B)  It is not aromatic. 
C)  It obeys Hückel's rule. 
D)  It undergoes reactions characteristic of benzene. 
E)  It has a closed shell of 6 pi-electrons.

Question 17

Consider the oxygen atom in the molecules of furan and tetrahydrofuran.Bearing in mind that furan exhibits aromatic properties,compare the hybridization of oxygen in both species,explaining why it must be different,although at first glance,it may appear identical.

Accepted Answer

@#IMG-DLM& Oxygen has 2 lone electron pairs in bot

Question 18

In the molecular orbital model of cyclobutadiene,how many  $\pi$-antibonding molecular orbitals are there?

Accepted Answer

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

Question 19

How many dichloronaphthalenes are possible?

Accepted Answer

A)  7 
B)  8 
C)  9 
D)  10 
E)  12 
A)  7 
B)  8 
C)  9 
D)  10 
E)  12

Question 20

Which of the following statements regarding the cyclopropenyl anion is correct?

Accepted Answer

A)  It is aromatic. 
B)  It is not aromatic. 
C)  It obeys Hückel's rule. 
D)  It undergoes reactions characteristic of benzene. 
E)  It has a closed shell of 6 pi-electrons. 
A)  It is aromatic. 
B)  It is not aromatic. 
C)  It obeys Hückel's rule. 
D)  It undergoes reactions characteristic of benzene. 
E)  It has a closed shell of 6 pi-electrons.

Exam 14: Aromatic Compounds

The correct name for the compound shown below is:

On the basis of molecular orbital theory and Hückel's rule,which of these compounds should be aromatic?

Xylene is the name commonly assigned to:

In the molecular orbital model of benzene,how many pi-electrons are delocalized about the ring?

In the molecular orbital model of the cyclopentadienyl cation,how many π\piπ -bonding molecular orbitals are there?

Which compound would you NOT expect to be aromatic?

Aniline is the name commonly assigned to:

How many equivalent resonance structures can be written for the cyclopentadienyl anion?

Which dichlorobenzene might theoretically yield three mononitro products?

The difference between the amount of heat actually released upon hydrogenation of benzene and that calculated on the basis of the Kekule structure is called the ____________________ of benzene.

In the molecular orbital model of benzene,how many pi-electrons are in bonding molecular orbitals?

Why would 1,3-cyclohexadiene undergo dehydrogenation readily?

Which reagent(s)would serve as the basis for a simple chemical test that would distinguish between ethylbenzene and vinylcyclohexane?

Which of the following is NOT true of benzene?

How many different dibromophenols are possible?

Which of the following statements regarding the cyclopentadienyl cation is correct?

Consider the oxygen atom in the molecules of furan and tetrahydrofuran.Bearing in mind that furan exhibits aromatic properties,compare the hybridization of oxygen in both species,explaining why it must be different,although at first glance,it may appear identical.

In the molecular orbital model of cyclobutadiene,how many π\piπ -antibonding molecular orbitals are there?

How many dichloronaphthalenes are possible?

Which of the following statements regarding the cyclopropenyl anion is correct?

Carbon Compounds and Chemical Bonds

Representative Carbon Compounds: Functional Groups, Intermolecular Forces, and Infrared Ir Spectroscopy

An Introduction to Organic Reactions: Acids and Bases

Alkanes: Nomenclature, Conformational Analysis, and an Introduction to Synthesis

Stereochemistry: Chiral Molecules

Ionic Reactions - Nucleophilic Substitution and Elimination Reactions of Alkyl Halides

Alkenes and Alkynes I: Properties and Synthesis, Elimination Reactions of Alkyl Halides

Alkenes and Alkynes Ii: Addition Reactions

Nuclear Magnetic Resonance and Mass Spectrometry: Tools for Structure Determination

Radical Reactions

Alcohols and Ethers

Alcohols From Carbonyl Compounds Oxidation-Reduction and Organometallic Compounds

Conjugated Unsaturated Systems

Reactions of Aromatic Compounds

Aldehydes and Ketones I Nucleophilic Addition to the Carbonyl Group

Aldehydes and Ketones Ii Aldol Reactions

Carboxylic Acids and Their Derivatives Nucleophilic Addition - Elimination at the Acyl Carbon

Synthesis and Reactions of Beta-Dicarbonyl Compounds: More Chemistry of Enolate Ions

Amines

Phenols and Aryl Halides: Nucleophilic Aromatic Substitution

Carbohydrates

Lipids

Amino Acids and Proteins

Nucleic Acids and Protein Synthesis

Filters

In the molecular orbital model of the cyclopentadienyl cation,how many $\pi$ -bonding molecular orbitals are there?

In the molecular orbital model of cyclobutadiene,how many $\pi$ -antibonding molecular orbitals are there?