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For an addition reaction, why does free energy, Ξ”\Delta G, become more positive with increasing temperature?


A) The positive entropy dominates at high temperature.
B) The negative entropy dominates at high temperature.
C) The positive enthalpy dominates at high temperature.
D) The negative enthalpy dominates at high temperature.
E) The enthalpy and entropy cancel at high temperature.

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Which of the following alkene addition reactions occur(s) specifically in syn fashion?


A) dihydroxylation using OsO4, H2O2
B) addition of H2
C) hydroboration
D) addition of HCl
E) A, B, and C

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Which of the molecules below are enantiomers formed as products upon reaction of HBr with 4-methylpent-1-ene? Which of the molecules below are enantiomers formed as products upon reaction of HBr with 4-methylpent-1-ene? A) I and II B) II and III C) III and IV D) I and III E) II and IV


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

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What are the expected major products from the reaction sequence shown below? What are the expected major products from the reaction sequence shown below? A) I B) II C) III D) IV E) V


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

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Addition of HI to the alkene of the cyclobutane in the scheme below, results in a significant yield of the product shown. What other product(s) might also be obtained? Explain with a mechanism and brief discussion the observation of the given product as well as others that may arise. Addition of HI to the alkene of the cyclobutane in the scheme below, results in a significant yield of the product shown. What other product(s) might also be obtained? Explain with a mechanism and brief discussion the observation of the given product as well as others that may arise.

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blured image Regioselective addition of the proton o...

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The expected major product of the following reaction is: The expected major product of the following reaction is: A) I B) II C) III D) IV E) V


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

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The regioselectivity and stereospecificity in the acid-catalyzed hydration of an alkene is best described as:


A) Markovnikov orientation with syn-addition
B) Markovnikov orientation with anti-addition
C) anti-Markovnikov orientation with syn-addition
D) anti-Markovnikov orientation with anti-addition
E) Markovnikov orientation with both syn- and anti-addition

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What would be the optimal conditions to effect the following transformation? What would be the optimal conditions to effect the following transformation? A) Dilute H<sub>2</sub>SO<sub>4</sub> B) Concentrated H<sub>2</sub>SO<sub>4</sub> C) Dilute HBr D) Concentrated HBr


A) Dilute H2SO4
B) Concentrated H2SO4
C) Dilute HBr
D) Concentrated HBr

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Provide the structure(s) of the expected major organic product(s) generated upon completion of the following reaction scheme: Provide the structure(s) of the expected major organic product(s) generated upon completion of the following reaction scheme:

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Addition reactions of alkenes are characterized by:


A) formation of a Ο€ bond
B) addition of two groups across a double bond
C) breaking of a Ο€ bond
D) A and B
E) B and C

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What is the expected major product of the following reaction sequence? What is the expected major product of the following reaction sequence? A) B) C) D) E)


A) What is the expected major product of the following reaction sequence? A) B) C) D) E)
B) What is the expected major product of the following reaction sequence? A) B) C) D) E)
C) What is the expected major product of the following reaction sequence? A) B) C) D) E)
D) What is the expected major product of the following reaction sequence? A) B) C) D) E)
E) What is the expected major product of the following reaction sequence? A) B) C) D) E)

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How many distinct resonances would appear in the (proton-decoupled) 13C NMR spectrum for the product of the following reaction? How many distinct resonances would appear in the (proton-decoupled) <sup>13</sup>C NMR spectrum for the product of the following reaction? A) 4 B) 5 C) 6 D) 7


A) 4
B) 5
C) 6
D) 7

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Which reaction is not stereospecific? Which reaction is not stereospecific? A) I B) II C) III D) IV


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

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The reaction shown below would be expected to produce as major products which of the following compounds? The reaction shown below would be expected to produce as major products which of the following compounds? A) B) C) D) E)


A) The reaction shown below would be expected to produce as major products which of the following compounds? A) B) C) D) E)
B) The reaction shown below would be expected to produce as major products which of the following compounds? A) B) C) D) E)
C) The reaction shown below would be expected to produce as major products which of the following compounds? A) B) C) D) E)
D) The reaction shown below would be expected to produce as major products which of the following compounds? A) B) C) D) E)
E) The reaction shown below would be expected to produce as major products which of the following compounds? A) B) C) D) E)

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Predict the structure(s) of the expected major organic product(s) of the following reaction. Include regiochemical and/or stereochemical details as needed. Predict the structure(s) of the expected major organic product(s) of the following reaction. Include regiochemical and/or stereochemical details as needed.

Correct Answer

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blured image The reaction takes place with...

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What is the expected major product of the following reaction sequence? What is the expected major product of the following reaction sequence? A) B) C) D) E)


A) What is the expected major product of the following reaction sequence? A) B) C) D) E)
B) What is the expected major product of the following reaction sequence? A) B) C) D) E)
C) What is the expected major product of the following reaction sequence? A) B) C) D) E)
D) What is the expected major product of the following reaction sequence? A) B) C) D) E)
E) What is the expected major product of the following reaction sequence? A) B) C) D) E)

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The expected major product of the following reaction is: The expected major product of the following reaction is: A) B) C) D) E)


A) The expected major product of the following reaction is: A) B) C) D) E)
B) The expected major product of the following reaction is: A) B) C) D) E)
C) The expected major product of the following reaction is: A) B) C) D) E)
D) The expected major product of the following reaction is: A) B) C) D) E)
E) The expected major product of the following reaction is: A) B) C) D) E)

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Any proper mechanism of hydroboration-oxidation must explain the observed _________ addition of the H and OH to the alkene as well as the _____________ regiochemistry.

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syn, anti-...

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What is the expected major product for the following reaction sequence? What is the expected major product for the following reaction sequence? A) B) C) D) E)


A) What is the expected major product for the following reaction sequence? A) B) C) D) E)
B) What is the expected major product for the following reaction sequence? A) B) C) D) E)
C) What is the expected major product for the following reaction sequence? A) B) C) D) E)
D) What is the expected major product for the following reaction sequence? A) B) C) D) E)
E) What is the expected major product for the following reaction sequence? A) B) C) D) E)

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What is the major product for the following reaction? What is the major product for the following reaction? A) B) C) D) E)


A) What is the major product for the following reaction? A) B) C) D) E)
B) What is the major product for the following reaction? A) B) C) D) E)
C) What is the major product for the following reaction? A) B) C) D) E)
D) What is the major product for the following reaction? A) B) C) D) E)
E) What is the major product for the following reaction? A) B) C) D) E)

Correct Answer

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