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Q.

Which of the following cannot be used in Friedal-Craft's reactions

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a

FeBr2

b

AlCl3

c

FeCl3

d

NaCl

answer is D.

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Detailed Solution

All cations are expected to act as Lewis acid because they are electron deficient in nature. However, cation such as Na+, K+, etc., (inert gas configuration) have a very little tendency to accept electrons. Therefore, they do not act as Lewis acids in
Friedel-Craft 's reaction

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