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

$\begin{array}{1 1}(a)\;FeCl_3\\(b)\;FeBr_2\\(c)\;AlCl_3\\(d)\;NaCl\end{array}$

1 Answer

All cations are expected to act as Lewis acids since they are electron deficient in nature.However calions 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 Friedal-Craft's reaction.
$\therefore$ The option is (d) $NaCl$
answered Mar 18, 2014 by sreemathi.v

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