Exam 20: Dienes, Conjugated Systems, and Pericyclic Reactions

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Which of the following terms describes the mechanism for the addition of Br2 to butadiene?

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Which of the following has the highest value of λ\lambda max in the ultraviolet-visible spectrum?  Which of the following has the highest value of  \lambda <sub>max</sub> in the ultraviolet-visible spectrum?

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Consider the reaction below to answer the following question(s): Consider the reaction below to answer the following question(s):   Enter the appropriate letter in the blank for each the following statements. -The product that results from following mechanistic step is _____.  Enter the appropriate letter in the blank for each the following statements. -The product that results from following mechanistic step is _____. Consider the reaction below to answer the following question(s):   Enter the appropriate letter in the blank for each the following statements. -The product that results from following mechanistic step is _____.

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What is the IUPAC name of the following compound? What is the IUPAC name of the following compound?

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Which of the following arrangements of p atomic orbitals gives the lowest energy π\pi -bonding molecular orbital of 1,3-butadiene?  Which of the following arrangements of p atomic orbitals gives the lowest energy  \pi -bonding molecular orbital of 1,3-butadiene?

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What are the two major organic products obtained from the following reaction? What are the two major organic products obtained from the following reaction?

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Which of the following alkenes undergoes the least exothermic hydrogenation upon treatment with H2/Pd Which of the following alkenes undergoes the least exothermic hydrogenation upon treatment with H<sub>2</sub>/Pd

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Consider the reaction below to answer the following question(s). Consider the reaction below to answer the following question(s).   Fill in the blank in the question with the appropriate letter. -This is an example of a(n) ____________ reaction. Fill in the blank in the question with the appropriate letter. -This is an example of a(n) ____________ reaction.

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Consider the reaction below to answer the following question(s): Consider the reaction below to answer the following question(s):   Enter the appropriate letter in the blank for each the following statements. -The kinetically controlled product in this reaction is _____. Enter the appropriate letter in the blank for each the following statements. -The kinetically controlled product in this reaction is _____.

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