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In pyrole the electron density is maximu...

In pyrole the electron density is maximum on
.

A

`2and3`

B

`3and4`

C

`2and4`

D

`2and5`

Text Solution

Verified by Experts

The correct Answer is:
D
Pyrrole (a very important five membered hetrocyclic) is resonance hydrid
Since resonating structure(III) and (IV) are relatively more stable (due to lasser charge separation) than resonating structures(II) and (V) the electrons density is maximum on `2and5` Hence electrophilic substitution in pyrrole occurs predominantly in the `2-(or5-)` position
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Knowledge Check

  • In phenol , pi -electron-density is maximum on

    A
    ortho and meta positions
    B
    ortho and para positions
    C
    meta and pera positions
    D
    none of these

  • Electron affinity is maximum for

    A
    Cl
    B
    F
    C
    Br
    D
    I

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    A
    `S` is correct by ` E` is wrong .
    B
    `S` is wrong but E is wrong .
    C
    Both `S` and `E` are correct and `E` is correct explanation os ` S` .
    D
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