Question

25. Which of the following is the most stable carbocation?
(1) CH₂ - CH-ON
A CH - CH - OCH
(3) CH3 -CH-NO
Vod CH - CH-CH

CONSIGER ATTACHED​

Answer 1

Answer:

The correct answer is (4).

A carbocation is an ion with a positive charge on carbon.

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This is because due to following reasons :

• In (1), the carbocation is attached to an electron withdrawing group i.e. cyanide group, which further decreases the electron density on carbocation which makes it unstable.

• In (2), the methoxy group is attached to the carbocation. Although, it acts as an electron donating but oxygen, being a more electronegative element, tends to decrease the electron density.

• In (3), the carbocation is attached to an electron withdrawing group i.e. nitro group, which further decreases the electron density on carbocation which makes it unstable.

• In (4), the carbocation is attached to an electron donating group which tends to increase the electron density on carbocation and thus make it more stable.