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

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What is the kinetic product for the following reaction? What is the kinetic product for the following reaction? A) I B) II C) III D) IV E) V What is the kinetic product for the following reaction? A) I B) II C) III D) IV E) V


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

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What is/are the product(s) from the following reaction? What is/are the product(s) from the following reaction? A) I and II B) I and III C) I and IV D) II and III E) II and IV


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

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One of the following compounds is aromatic and the other is antiaromatic. Which is which? One of the following compounds is aromatic and the other is antiaromatic. Which is which?

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a)is aroma...

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Is the following molecule aromatic? Explain. Is the following molecule aromatic? Explain.

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Yes, it is aromatic ...

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When 1, 3-butadiene reacts with CH2 When 1, 3-butadiene reacts with CH<sub>2</sub> <sub> </sub> CHCN, which of the terms below best describes the product mixture? A) a mixture of two diastereomers B) a single compound C) a racemic mixture D) optically active E) a mixture of bicyclic compounds CHCN, which of the terms below best describes the product mixture?


A) a mixture of two diastereomers
B) a single compound
C) a racemic mixture
D) optically active
E) a mixture of bicyclic compounds

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What compound results from the 1, 4-addition of one equivalent of HBr to 1, 3-butadiene?


A) 1-bromo-1-butene
B) 2-bromo-2-butene
C) 4-bromo-1-butene
D) 3-bromo-1-butene
E) 1-bromo-2-butene

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Which of the following is/are the main product(s) of the following reaction? CH2 Which of the following is/are the main product(s) of the following reaction? CH<sub>2</sub><sub> </sub> CH-CH CH<sub>2 </sub> <sub> </sub> ? A) B) C) D) A and B E) A and C CH-CH Which of the following is/are the main product(s) of the following reaction? CH<sub>2</sub><sub> </sub> CH-CH CH<sub>2 </sub> <sub> </sub> ? A) B) C) D) A and B E) A and C CH2 Which of the following is/are the main product(s) of the following reaction? CH<sub>2</sub><sub> </sub> CH-CH CH<sub>2 </sub> <sub> </sub> ? A) B) C) D) A and B E) A and C ?


A) Which of the following is/are the main product(s) of the following reaction? CH<sub>2</sub><sub> </sub> CH-CH CH<sub>2 </sub> <sub> </sub> ? A) B) C) D) A and B E) A and C
B) Which of the following is/are the main product(s) of the following reaction? CH<sub>2</sub><sub> </sub> CH-CH CH<sub>2 </sub> <sub> </sub> ? A) B) C) D) A and B E) A and C
C) Which of the following is/are the main product(s) of the following reaction? CH<sub>2</sub><sub> </sub> CH-CH CH<sub>2 </sub> <sub> </sub> ? A) B) C) D) A and B E) A and C
D) A and B
E) A and C

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Identify the correctly drawn arrows.


A) Identify the correctly drawn arrows. A) B) C) D) E)
B) Identify the correctly drawn arrows. A) B) C) D) E)
C) Identify the correctly drawn arrows. A) B) C) D) E)
D) Identify the correctly drawn arrows. A) B) C) D) E)
E) Identify the correctly drawn arrows. A) B) C) D) E)

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What diene and dienophile would react to give the product below? What diene and dienophile would react to give the product below?

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Give the major organic product for the reaction. Give the major organic product for the reaction. A) B) C) D) E) no reaction


A) Give the major organic product for the reaction. A) B) C) D) E) no reaction
B) Give the major organic product for the reaction. A) B) C) D) E) no reaction
C) Give the major organic product for the reaction. A) B) C) D) E) no reaction
D) Give the major organic product for the reaction. A) B) C) D) E) no reaction
E) no reaction

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

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Mark the most electron-rich carbon atom in the compound below with an asterisk.

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Provide the major organic product. Provide the major organic product.

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In the addition of HBr to conjugated dienes, is the product which results from 1,2-addition or that which results from 1,4-addition typically the product of kinetic control?

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The product of kinet...

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Which of the following compounds is aromatic? Which of the following compounds is aromatic? A) I B) II C) III D) IV E) V


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

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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?

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This suggests that t...

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Provide the structure of the major organic product in the following reaction. Provide the structure of the major organic product in the following reaction.

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blured image_TB1830_00...

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What diene and dienophile should be used to synthesize the compound below and its enantiomer? What diene and dienophile should be used to synthesize the compound below and its enantiomer?

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The Diels-Alder reaction is a concerted reaction; this means that ________.


A) a mixture of endo and exo products is formed
B) all bond making and bond breaking occurs simultaneously
C) the products contain rings
D) the reaction follows Markovnikov's rule
E) the reaction is highly endothermic

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