Which of the Following Statements About Nucleophilic Aromatic Substitution Is

question 59

Multiple Choice

Which of the following statements about nucleophilic aromatic substitution is true?

• A)For the addition-elimination pathway,the nucleophile may become attached either at the site bearing the leaving group or at the site bearing the ortho hydrogen atom.
• B)For the elimination-addition pathway,the nucleophile becomes attached only at the site bearing the leaving group.
• C)The elimination-addition mechanism is not as common as the addition-elimination mechanism.
• D)In the addition-elimination mechanism,the aromatic ring first accepts a pair of electrons from a nucleophile to form a cationic intermediate.

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