Question 1

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

Accepted Answer

The answer of Classify cyclopentadienyl cation as aromatic,antiaromatic,or nonaromatic.Assume planarity...

Question 2

Draw the important resonance contributing forms for the structure shown below.

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The answer of Draw the important resonance contributing forms for...

Question 3

When cycloheptatriene is deprotonated,an anion with seven resonance forms of equal energy can be drawn.Given this fact,explain why cycloheptatriene is only slightly more acidic than propene.

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The answer of When cycloheptatriene is deprotonated,an anion with seven...

Question 4

Which of the following is the weakest base?

Accepted Answer

A) phenolate ion (C6H5O-) 
B) ethoxide ion (CH3CH2O-) 
C) hydroxide ion (HO-) 
D) acetate ion (CH3CO2-) 
E) methoxide ion (CH3O-)

Question 5

Which of the following compounds is more stable? Explain.

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The answer of Which of the following compounds is more...

Question 6

Which of the following compounds contains the longest carbon-carbon single bond?

Accepted Answer

A) allene 
B) 1,3-butadiyne 
C) 1,3-butadiene 
D) propyne 
E) ethane

Question 7

Is cyclooctatetraene a planar molecule? Explain.

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Question 8

Which of the following structures contributes most to the resonance hybrid.

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Question 9

Which of the following is antiaromatic?

Accepted Answer

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

Question 10

Draw (Z)-1,3-hexadiene in its s-trans conformation.

Accepted Answer

The answer of Draw (Z)-1,3-hexadiene in its s-trans conformation....

Question 11

Which of the following is the most stable diene?

Accepted Answer

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

Question 12

In which of the following does resonance delocalization of electron density not play a role?

Accepted Answer

A) allyl cation 
B) benzyl anion 
C) CO32- 
D) O3 
E) cyclohexyl radical

Question 13

Which of the following is/are the major product(s)of the following reaction?

Accepted Answer

A) I 
B) I and III 
C) II 
D) II and III 
E) III

Question 14

What diene and what dieneophile would be used to synthesize the following compound?

Accepted Answer

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

Question 15

Which of the structures below would be aromatic?

Accepted Answer

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

Question 16

Draw all major resonance contributors of the species below.

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Question 17

Provide the structure of the biologically significant heterocycle pyrimidine.

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Question 18

Draw all major resonance contributors of the species below.

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Question 19

Which of the following is/are the major product(s)of the following reaction?

Accepted Answer

A) I 
B) I and II 
C) I and III 
D) II 
E) III

Question 20

Draw all major resonance contributors of the species below.

Accepted Answer

The answer of Draw all major resonance contributors of the...

Exam 8: Delocalized Electrons: Their Effect on Stability, pka, and the Products of a Reaction - Aromaticity and Electronic Effects: an Introduction to the Reactions of Benzene

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

Draw the important resonance contributing forms for the structure shown below.

When cycloheptatriene is deprotonated,an anion with seven resonance forms of equal energy can be drawn.Given this fact,explain why cycloheptatriene is only slightly more acidic than propene.

Which of the following is the weakest base?

Which of the following compounds is more stable? Explain.

Which of the following compounds contains the longest carbon-carbon single bond?

Is cyclooctatetraene a planar molecule? Explain.

Which of the following structures contributes most to the resonance hybrid.

Which of the following is antiaromatic?

Draw (Z)-1,3-hexadiene in its s-trans conformation.

Which of the following is the most stable diene?

In which of the following does resonance delocalization of electron density not play a role?

Which of the following is/are the major product(s) of the following reaction?

What diene and what dieneophile would be used to synthesize the following compound?

Which of the structures below would be aromatic?

Draw all major resonance contributors of the species below.

Provide the structure of the biologically significant heterocycle pyrimidine.

Draw all major resonance contributors of the species below.

Which of the following is/are the major product(s) of the following reaction?

Draw all major resonance contributors of the species below.