Chapter 11: 45dE (page 350)
How might you prepare each of the following molecules using a nucleophilic substitution reaction at some step?
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Chapter 11: 45dE (page 350)
How might you prepare each of the following molecules using a nucleophilic substitution reaction at some step?
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Question: Arrange the carbocations below, in order of increasing stability:
b.

Methyl esters () undergo a cleavage reaction to yield carboxylate ions plus iodomethane on heating with LiI in dimethylformamide:

The following evidence has been obtained: (1) The reaction occurs much faster in DMF than in ethanol. (2) The corresponding ethyl ester () cleaves approximately 10 times more slowly than the methyl ester. Propose a mechanism for the reaction. What other kinds of experimental evidence could you gather to support your hypothesis?
Which compound in each of the following pairs will react faster in an SN2reaction with?
a) CH3Br or CH3I
Which reaction in each of the following pairs would you expect to be faster?
(d) Thedisplacement byon bromomethane in benzene or in acetonitrile
How might you prepare each of the following molecules using a nucleophilic substitution reaction at some step?

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