Which of the following carbocations is least | vedclass

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(D) The stability of a benzyl carbocation is influenced by the substituent present on the benzene ring. Electron-donating groups $(EDG)$ increase the

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p-Nitrobenzyl carbocation

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(D) The stability of a benzyl carbocation is influenced by the substituent present on the benzene ring. Electron-donating groups $(EDG)$ increase the stability of the carbocation by donating electron density,while electron-withdrawing groups $(EWG)$ decrease the stability by withdrawing electron density. In the given options: $1$. $p$-Methylbenzyl carbocation has a $-CH_3$ group,which is an electron-donating group ($+I$ and hyperconjugation),making it the most stable. $2$. $p$-Fluorobenzyl carbocation has a $-F$ group,which is weakly electron-withdrawing by induction $(-I)$ but can donate electrons by resonance $(+M)$. $3$. $p$-Cyanobenzyl carbocation has a $-CN$ group,which is a strong electron-withdrawing group ($-I$ and $-M$). $4$. $p$-Nitrobenzyl carbocation has a $-NO_2$ group,which is a very strong electron-withdrawing group ($-I$ and $-M$). Since the $-NO_2$ group is a stronger electron-withdrawing group than the $-CN$ group,the $p$-nitrobenzyl carbocation is the least stable among the given options.

Which of the following carbocations is least stable?

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In which of the following reactions does a rearrangement take place with a change in the carbon skeleton?

In the following carbocation,the $H$ or $CH_3$ group that is most likely to migrate to the positively charged carbon is:

Which of the following carbocations is least stable?

Arrange the following carbanions in the decreasing order of stability:
$I. \ p-Br-C_6H_4-CH_2^-$
$II. \ C_6H_5-CH_2^-$
$III. \ p-CH_3O-C_6H_4-CH_2^-$
$IV. \ p-CHO-C_6H_4-CH_2^-$
$V. \ p-CH_3-C_6H_4-CH_2^-$
Choose the correct answer from the options given below:

Arrange the following carbanions in the order of their stability:
$i$. $RC \equiv C^{\ominus}$
$ii$. $C_6H_5^{\ominus}$
$iii$. $R_2C = CH^{\ominus}$
$iv$. $R_3C - CH_2^{\ominus}$

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Which of the following carbocations is least stable?

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In which of the following reactions does a rearrangement take place with a change in the carbon skeleton?

In the following carbocation,the $H$ or $CH_3$ group that is most likely to migrate to the positively charged carbon is:

Which of the following carbocations is least stable?

Arrange the following carbanions in the decreasing order of stability:$I. \ p-Br-C_6H_4-CH_2^-$$II. \ C_6H_5-CH_2^-$$III. \ p-CH_3O-C_6H_4-CH_2^-$$IV. \ p-CHO-C_6H_4-CH_2^-$$V. \ p-CH_3-C_6H_4-CH_2^-$Choose the correct answer from the options given below:

Arrange the following carbanions in the order of their stability:$i$. $RC \equiv C^{\ominus}$$ii$. $C_6H_5^{\ominus}$$iii$. $R_2C = CH^{\ominus}$$iv$. $R_3C - CH_2^{\ominus}$

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Arrange the following carbanions in the decreasing order of stability:
$I. \ p-Br-C_6H_4-CH_2^-$
$II. \ C_6H_5-CH_2^-$
$III. \ p-CH_3O-C_6H_4-CH_2^-$
$IV. \ p-CHO-C_6H_4-CH_2^-$
$V. \ p-CH_3-C_6H_4-CH_2^-$
Choose the correct answer from the options given below:

Arrange the following carbanions in the order of their stability:
$i$. $RC \equiv C^{\ominus}$
$ii$. $C_6H_5^{\ominus}$
$iii$. $R_2C = CH^{\ominus}$
$iv$. $R_3C - CH_2^{\ominus}$