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Briefly explain why the synthetic step shown below is incorrect,and rewrite it so that it is correct. Briefly explain why the synthetic step shown below is incorrect,and rewrite it so that it is correct.

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The step shown is incorrect because chlo...

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Which of the following would yield the compound shown via an E2 reaction? Which of the following would yield the compound shown via an E2 reaction? A) B) C) D) E)


A) Which of the following would yield the compound shown via an E2 reaction? A) B) C) D) E)
B) Which of the following would yield the compound shown via an E2 reaction? A) B) C) D) E)
C) Which of the following would yield the compound shown via an E2 reaction? A) B) C) D) E)
D) Which of the following would yield the compound shown via an E2 reaction? A) B) C) D) E)
E) Which of the following would yield the compound shown via an E2 reaction? A) B) C) D) E)

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What is the missing starting material in the following synthetic sequence? What is the missing starting material in the following synthetic sequence? A) B) C) D) E)


A) What is the missing starting material in the following synthetic sequence? A) B) C) D) E)
B) What is the missing starting material in the following synthetic sequence? A) B) C) D) E)
C) What is the missing starting material in the following synthetic sequence? A) B) C) D) E)
D) What is the missing starting material in the following synthetic sequence? A) B) C) D) E)
E) What is the missing starting material in the following synthetic sequence? A) B) C) D) E)

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Which of the following solvents would not be a good choice to use when carrying out the reaction below? Which of the following solvents would not be a good choice to use when carrying out the reaction below? A) DMSO B) CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>OH C) CH<sub>3</sub>OH D) DMF E) Ethyl acetate


A) DMSO
B) CH3CH2CH2OH
C) CH3OH
D) DMF
E) Ethyl acetate

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Determine the overall percent yield for a five-step synthesis in which the yield of each individual step is 90%.


A) 90%
B) 45%
C) 59%
D) 81%
E) 33%

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Fill in the missing starting material needed to complete the following synthetic step. Fill in the missing starting material needed to complete the following synthetic step.

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A researcher synthesizes 2-bromo-2-phenylpentane by reacting 2-phenyl-2-tosylpentane with potassium bromide.Write a synthetic step that shows this reaction,and draw the mechanism.

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Show how the following could be synthesized from two separate alkynes,each with no more than four carbon atoms. Show how the following could be synthesized from two separate alkynes,each with no more than four carbon atoms.

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Which of the following solvents would be the best choice to use when carrying out the reaction below? Which of the following solvents would be the best choice to use when carrying out the reaction below? A) H<sub>2</sub>O B) CH<sub>3</sub>OH C) Acetic acid D) CH<sub>3</sub>CH<sub>2</sub>OH E) Cyclohexanol


A) H2O
B) CH3OH
C) Acetic acid
D) CH3CH2OH
E) Cyclohexanol

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Supply the missing reagents necessary to complete the synthetic steps shown below,and indicate whether each step is a functional group conversion or a carbon-carbon bond formation reaction. Supply the missing reagents necessary to complete the synthetic steps shown below,and indicate whether each step is a functional group conversion or a carbon-carbon bond formation reaction.

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Show how the following synthetic transformation could be carried out. Show how the following synthetic transformation could be carried out.

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Show how you would carry out the following transformation. Show how you would carry out the following transformation.

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Write a synthetic step that shows the following reaction: 3-pentanone was treated first with lithium diisopropylamide.After this reaction was allowed to reach completion,the resulting product was treated with ethyl bromide to yield 4-methyl-3-hexanone as the overall product.

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Which of the following synthetic steps is written correctly and would lead to the product shown?


A) Which of the following synthetic steps is written correctly and would lead to the product shown? A) B) C) D) E)
B) Which of the following synthetic steps is written correctly and would lead to the product shown? A) B) C) D) E)
C) Which of the following synthetic steps is written correctly and would lead to the product shown? A) B) C) D) E)
D) Which of the following synthetic steps is written correctly and would lead to the product shown? A) B) C) D) E)
E) Which of the following synthetic steps is written correctly and would lead to the product shown? A) B) C) D) E)

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Draw two possible sets of precursors that could be used to synthesize the target molecule below. Draw two possible sets of precursors that could be used to synthesize the target molecule below.

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Which of the following steps would result in an alteration of the carbon skeleton?


A) Which of the following steps would result in an alteration of the carbon skeleton? A) B) C) D) E)
B) Which of the following steps would result in an alteration of the carbon skeleton? A) B) C) D) E)
C) Which of the following steps would result in an alteration of the carbon skeleton? A) B) C) D) E)
D) Which of the following steps would result in an alteration of the carbon skeleton? A) B) C) D) E)
E) Which of the following steps would result in an alteration of the carbon skeleton? A) B) C) D) E)

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Which of the following is appropriate to include in a synthetic step but should not be included in the mechanism for a reaction?


A) Starting materials
B) Mechanism arrows
C) Products
D) Reaction temperature
E) Necessary reagents

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Determine the final product of the reaction sequence shown below. Determine the final product of the reaction sequence shown below. A) B) C) D) E)


A) Determine the final product of the reaction sequence shown below. A) B) C) D) E)
B) Determine the final product of the reaction sequence shown below. A) B) C) D) E)
C) Determine the final product of the reaction sequence shown below. A) B) C) D) E)
D) Determine the final product of the reaction sequence shown below. A) B) C) D) E)
E) Determine the final product of the reaction sequence shown below. A) B) C) D) E)

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Choose the best precursors that could be used to synthesize the target molecule in the forward direction. Choose the best precursors that could be used to synthesize the target molecule in the forward direction. A) B) C) D) E)


A) Choose the best precursors that could be used to synthesize the target molecule in the forward direction. A) B) C) D) E)
B) Choose the best precursors that could be used to synthesize the target molecule in the forward direction. A) B) C) D) E)
C) Choose the best precursors that could be used to synthesize the target molecule in the forward direction. A) B) C) D) E)
D) Choose the best precursors that could be used to synthesize the target molecule in the forward direction. A) B) C) D) E)
E) Choose the best precursors that could be used to synthesize the target molecule in the forward direction. A) B) C) D) E)

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A student proposes the following synthetic step.Explain the potential error in this proposed step,and suggest a better alternative to carry out the desired synthetic transformation. A student proposes the following synthetic step.Explain the potential error in this proposed step,and suggest a better alternative to carry out the desired synthetic transformation.

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Subjecting an alkene to bromine in the p...

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