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Compounds of Pnictogens-Trends

The descendin...

Question

The descending order of stability of the carbonium ions.
$C_{6} H_{5} + C H_{2}, p - (C H_{3} O) C_{6} H_{4} + C H_{2}, p - (N O_{2}) C_{6} H_{4} + C H_{2}$ and $p - (C H_{3}) C_{6} H_{4} + C H_{2}$ is?

IV > II > I > III

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II > IV > III > I

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II > IV > I > III

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IV > II > III > I

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Solution

The correct option is A IV > II > I > III
Electron donating groups increase the stability of carbonium ions by increasing electron density where as electron withdrawing groups decrease the stability of carbonium ions.
Hence, $- N O_{2}$ is electron withdrawing group.
$- C H_{3}$ is electron releasing group.
& $- O C H_{3}$ is in between $- N O_{2}$ & $- C H_{3}$ . Hence order of stability is,
$I V > I I > I > I I I$

Suggest Corrections

Similar questions

C_{6} H_{5} \oplus C H_{2}

C_{6} H_{5} C H_{2} \oplus C H_{2}

C_{6} H_{5} \oplus C H C H_{3}

C_{6} H_{5} \oplus C (C H_{3})_{2}

C_{6} H_{5} + C H_{2}

C_{6} H_{5} C H_{2} + C H_{2}

C_{6} H_{5} C H C H_{3}

C_{6} H_{5} + C (C H_{3})_{2}

^{\oplus} C H_{2} - C O C H_{3}

^{\oplus} C H_{2} - O C H_{3}

^{\oplus} C H_{2} - C H_{3}

C l - \oplus C H_{2}

F - \oplus C H_{2}

C l - C H_{2} - \oplus C H_{2}

F - C H_{2} - \oplus C H_{2}

R_{2} C = C R_{2} I, R_{2} C = C H R I I, R_{2} C = C H_{2} I I I, R C H = C H R I V

R C H = C H_{2} V

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