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Which is the mechanism for this conversion? $CH_{3}$ --- $\rightarrow$ --- $CH_{2}Cl$ [1 mark] A - AQA - A-Level Chemistry - Question 23 - 2020 - Paper 3
Question 23
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Which is the mechanism for this conversion? $CH_{3}$ --- $\rightarrow$ --- $CH_{2}Cl$ [1 mark] A. Addition-elimination B. Electrophilic substitution C. Fr... show full transcript
Worked Solution & Example Answer:Which is the mechanism for this conversion? $CH_{3}$ --- $\rightarrow$ --- $CH_{2}Cl$ [1 mark] A - AQA - A-Level Chemistry - Question 23 - 2020 - Paper 3
Step 1
Identify the reaction type
Answer
In the given conversion, a methyl group is being transformed into a chloromethyl group. This kind of transformation typically does not involve the addition of new atoms but rather a substitution where the existing group (methyl) is replaced by another group (chloro).
Step 2
Consider common substitution mechanisms
Answer
The mechanism that fits this kind of transformation is often classified as an electrophilic substitution. This is because the aromatic ring (which includes the previous methyl group) is capable of acting as a nucleophile and facilitates the substitution process.
Step 3