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Structural and Physical Properties of Carbonyls

Consider a co...

Question

Consider a compound: $A - C H_{2} - C l$
$A$ can be any group. Select the correct statement(s).

A = - N O_{2}

C - C l

bond polarity increases.

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A = - N O_{2}

C - C l

bond polarity decreases.

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A = - O C H_{3}

C - C l

bond polarity increases.

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A = - O C H_{3}

C - C l

bond polarity decreases.

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Solution

The correct options are
B If $A = - N O_{2}$ , $C - C l$ bond polarity decreases.
D If $A = - O C H_{3}$ , $C - C l$ bond polarity decreases.
If A is Electron withdrawing group then bond polarity C-Cl decreases as a shared pair of electrons is now pulled by two groups hence polarity decreases.
If A is Electron donating group polarity increases.
Both $- N O_{2}$ and $- O C H_{3}$ are electron withdrawing groups.
Hence the $C - C l$ bond polarity decreases.

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