Which of the following is not a Lewis base?

C_{6} H_{5} N H_{2}

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C_{2} H_{5} O H

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N H_{3}

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S n C l_{4}

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Solution

The correct option is D $S n C l_{4}$
$C_{6} H_{5} N H_{2}$ , $C_{2} H_{5} O H$ and $N H_{3}$ have 2 and 1 lone pair with it on oxygen and nitrogen respectively which can be donated so it acts as Lewis base.

$S n C l_{4}$ has vacant d orbitals on Sn and have no lone pair so it acts as Lewis acid.

Option D is correct.

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