Question 1

Why is the following compound not aromatic?

Accepted Answer

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

Question 2

Where do the protons in benzene appear in the 1H NMR spectrum?

Accepted Answer

A) Around 1600 cm-1 
B) Around 120 ppm 
C) Around 0 ppm 
D) Around 7 ppm 
A) Around 1600 cm-1 
B) Around 120 ppm 
C) Around 0 ppm 
D) Around 7 ppm

Question 3

Which of the following heterocycles is not aromatic?

Accepted Answer

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

Question 4

Which of the following is not one of the Hückel's criteria for aromaticity?

Accepted Answer

A) The molecule must be cyclic. 
B) The molecule must be planar. 
C) The molecule must be completely conjugated. 
D) The molecule must have 4n pi electrons. 
A) The molecule must be cyclic. 
B) The molecule must be planar. 
C) The molecule must be completely conjugated. 
D) The molecule must have 4n pi electrons.

Question 5

Which of the following ions is aromatic?

Accepted Answer

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

Question 6

Which of the following compounds is not aromatic?

Accepted Answer

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

Question 7

What orbitals are used to form the indicated bond?

Accepted Answer

A) sp3 
B) sp2 
C) p 
D) sp3 and sp2 
A) sp3 
B) sp2 
C) p 
D) sp3 and sp2

Question 8

Which of the following molecules has the most acidic hydrogen atoms?

Accepted Answer

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

Question 9

Which of the following statements about benzene is true?

Accepted Answer

A) Benzene is a saturated hydrocarbon. 
B) Benzene undergoes addition reactions. 
C) Benzene has five degrees of unsaturation. 
D) Benzene undergoes substitution reactions. 
A) Benzene is a saturated hydrocarbon. 
B) Benzene undergoes addition reactions. 
C) Benzene has five degrees of unsaturation. 
D) Benzene undergoes substitution reactions.

Question 10

What is the correct structure for anisole?

Accepted Answer

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

Question 11

What is the correct structure for 1-bromo-2,4-dimethoxybenzene?

Accepted Answer

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

Exam 17: Benzene and Aromatic Compounds

Why is the following compound not aromatic?

Where do the protons in benzene appear in the 1H NMR spectrum?

Which of the following heterocycles is not aromatic?

Which of the following is not one of the Hückel's criteria for aromaticity?

Which of the following ions is aromatic?

Which of the following compounds is not aromatic?

What orbitals are used to form the indicated bond?

Which of the following molecules has the most acidic hydrogen atoms?

Which of the following statements about benzene is true?

What is the correct structure for anisole?

What is the correct structure for 1-bromo-2,4-dimethoxybenzene?

Structure and Bonding

Acids and Bases

Introduction to Organic Molecules and Functional Groups

Alkanes

Stereochemistry

Understanding Organic Reactions

Alkyl Halides and Nucleophilic Substitution

Alkyl Halides and Elimination Reactions

Alcohols, Ethers, and Related Compounds

Alkenes

Alkynes

Oxidation and Reduction

Mass Spectrometry and Infrared Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Radical Reactions

Conjugation, Resonance, and Dienes

Reactions of Aromatic Compounds

Carboxylic Acids and the Acidity of the O-H Bond

Introduction to Carbonyl Chemistry;

Aldehydes and Ketones Nucleophilic Addition

Carboxylic Acids and Derivatives

Substitution Reactions of Carbonyl Compounds at the Alpha-Carbon

Carbonyl Condensation Reactions

Amines

Carbon-Carbon Bond Forming Reactions in Organic Synthesis

Pericyclic Reactions

Carbohydrates

Amino Acids and Proteins

Synthetic Polymers

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Filters

Where do the protons in benzene appear in the ¹H NMR spectrum?