Question 1

Classify cyclopentadiene as aromatic, antiaromatic, or nonaromatic. Assume planarity of the π network.

Accepted Answer

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Question 2

Classify cycloheptatriene as aromatic, antiaromatic, or nonaromatic. Assume planarity of the π network.

Accepted Answer

The answer of Classify cycloheptatriene as aromatic, antiaromatic, or nonaromatic....

Question 3

Nitrogen's lone pair electrons occupy what type of orbital in pyridine?

Accepted Answer

A)  s 
B)  sp 
C)  sp2 
D)  sp3 
E)  p 
A)  s 
B)  sp 
C)  sp2 
D)  sp3 
E)  p

Question 4

Classify the compound below as aromatic, antiaromatic, or nonaromatic. Assume planarity of the π network.

Accepted Answer

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Question 5

Classify the compound below as aromatic, antiaromatic, or nonaromatic. Assume planarity of the π network.

Accepted Answer

The answer of Classify the compound below as aromatic, antiaromatic,...

Question 6

Even assuming the molecule below is planar, it would still be classified as non-aromatic. Why?

Accepted Answer

The center carbon of the allen

Question 7

How many peaks are in the proton spin decoupled 13C NMR spectrum of p-dichlorobenzene?

Accepted Answer

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

Question 8

Classify the compound below as aromatic, antiaromatic, or nonaromatic. Assume planarity of the π network.

Accepted Answer

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Question 9

Why would the reaction below proceed at an extremely slow rate if at all?

Accepted Answer

The carbocation intermediate involved in

Question 10

How could you distinguish the two compounds below using 1H and proton decoupled 13C NMR?

Accepted Answer

Compound A would have 4 peaks

Question 11

Which of the following is also an acceptable name for 3-nitrophenol?

Accepted Answer

A)  o-nitrophenol 
B)  m-nitrophenol 
C)  p-nitrophenol 
D)  3-cresol 
E)  hydroquinone 
A)  o-nitrophenol 
B)  m-nitrophenol 
C)  p-nitrophenol 
D)  3-cresol 
E)  hydroquinone

Question 12

What is suggested by the fact that benzene's molar heat of hydrogenation is 36 kcal less than three times the molar heat of hydrogenation of cyclohexene?

Accepted Answer

This suggests that t

Question 13

Classify the compound below as aromatic, antiaromatic, or nonaromatic. Assume planarity of the π network.

Accepted Answer

The answer of Classify the compound below as aromatic, antiaromatic,...

Question 14

Is the molecule below aromatic, antiaromatic, or nonaromatic?

Accepted Answer

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Question 15

Is the molecule below aromatic, antiaromatic, or nonaromatic?

Accepted Answer

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Question 16

Is the molecule below aromatic, antiaromatic, or nonaromatic?

Accepted Answer

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Question 17

Classify the compound below as aromatic, antiaromatic, or nonaromatic. Assume planarity of the π network.

Accepted Answer

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Question 18

Classify each nitrogen atom in the compound below as strongly basic or weakly basic, according to the availability of its lone pair of electrons.

Accepted Answer

All of the nitrogens

Question 19

Which of the following is not a fused-ring heterocycle?

Accepted Answer

A)  purine 
B)  pyrimidine 
C)  benzofuran 
D)  indole 
E)  quinoline 
A)  purine 
B)  pyrimidine 
C)  benzofuran 
D)  indole 
E)  quinoline

Question 20

Which sequence correctly ranks the following substrates in order of increasing reactivity in an SN1 reaction?

Accepted Answer

A)  1 < 2 < 3 
B)  2 < 3 < 1 
C)  3 < 1 < 2 
D)  1 < 3 < 2 
A)  1 < 2 < 3 
B)  2 < 3 < 1 
C)  3 < 1 < 2 
D)  1 < 3 < 2

Exam 16: Aromatic Compounds

Classify cyclopentadiene as aromatic, antiaromatic, or nonaromatic. Assume planarity of the π network.

Classify cycloheptatriene as aromatic, antiaromatic, or nonaromatic. Assume planarity of the π network.

Nitrogen's lone pair electrons occupy what type of orbital in pyridine?

Classify the compound below as aromatic, antiaromatic, or nonaromatic. Assume planarity of the π network.

Classify the compound below as aromatic, antiaromatic, or nonaromatic. Assume planarity of the π network.

Even assuming the molecule below is planar, it would still be classified as non-aromatic. Why?

How many peaks are in the proton spin decoupled 13C NMR spectrum of p-dichlorobenzene?

Classify the compound below as aromatic, antiaromatic, or nonaromatic. Assume planarity of the π network.

Why would the reaction below proceed at an extremely slow rate if at all?

How could you distinguish the two compounds below using 1H and proton decoupled 13C NMR?

Which of the following is also an acceptable name for 3-nitrophenol?

What is suggested by the fact that benzene's molar heat of hydrogenation is 36 kcal less than three times the molar heat of hydrogenation of cyclohexene?

Classify the compound below as aromatic, antiaromatic, or nonaromatic. Assume planarity of the π network.

Is the molecule below aromatic, antiaromatic, or nonaromatic?

Is the molecule below aromatic, antiaromatic, or nonaromatic?

Is the molecule below aromatic, antiaromatic, or nonaromatic?

Classify the compound below as aromatic, antiaromatic, or nonaromatic. Assume planarity of the π network.

Classify each nitrogen atom in the compound below as strongly basic or weakly basic, according to the availability of its lone pair of electrons.

Which of the following is not a fused-ring heterocycle?

Which sequence correctly ranks the following substrates in order of increasing reactivity in an SN1 reaction?

Structure and Bonding

Acids and Bases; Functional Groups

Structure and Stereochemistry of Alkanes

The Study of Chemical Reactions

Stereochemistry

Alkyl Halides; Nucleophilic Substitution

Structure and Synthesis of Alkenes; Elimination

Reactions of Alkenes

Structure and Synthesis of Alcohols

Reactions of Alcohols

Infrared Spectroscopy and Mass Spectrometry

Nuclear Magnetic Resonance Spectroscopy

Ethers, Epoxides, and Thioethers

Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy

Reactions of Aromatic Compounds

Ketones and Aldehydes

Amines

Carboxylic Acids

Carboxylic Acid Derivatives

Condensations and Alpha Substitutions of Carboxyl Compounds

Carbohydrates and Nucleic Acids

Amino Acids, Peptides, and Proteins

Lipids

Synthetic Polymers

Filters

How many peaks are in the proton spin decoupled ¹³C NMR spectrum of p-dichlorobenzene?

How could you distinguish the two compounds below using ¹H and proton decoupled ¹³C NMR?

Which sequence correctly ranks the following substrates in order of increasing reactivity in an S_N1 reaction?