Which of the following species has electron releasing (or +I inductive) effect?

- N H_{2}

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- C O O H

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(C H_{3})_{2} C H -

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C_{6} H_{5}^{-}

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Solution

The correct option is C $(C H_{3})_{2} C H -$
$- N H_{2}$ shows resonance effect due to the presence of a lone pair of electrons on the nitrogen atom.
The carboxylic group $- C O O H$ shows resonance effect.
The isopropyl group $(C H_{3})_{2} C H -$ (and alkyl groups in general) show electron releasing ( $+ I$ inductive effect).
They do not show resonance/ mesomeric effect.
The phenyl group $C_{6} H_{5}^{-}$ shows resonance effect due to the presence of pi electrons.

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Similar questions

The correct order of stability of the following carbanions is:

$(C H_{3})_{3} C^{-},^{-} C C l_{3}, (C H_{3})_{2} C H^{-}, C_{6} H_{5} - C H_{2}^{-}$

The arrangement of $(C H_{3})_{3} C -, (C H_{3})_{2} C H -, C H_{3} C H_{2} -$ When attached to a benzene or an unsaturated group in increasing order of inductive effect is:

Q. The arrangement of

(C H_{3})_{3} C -, (C H_{3})_{2} C H -, C H_{3} C H_{2} -

when attached to benzene or an unsaturated group in increasing order of inductive effect is

The order of -I power (-ve inductive effect ) of the following functional groups will be:

(i) $- S O_{3} H$

(ii) $- C l$

(iii) $- N H_{2}$

(iv) $- H$

A carbocation is a group of atoms with a positively charged carbon atom having six electrons in the valence shell after sharing. Carbocations are formed in the heterolysis of a bond and are planar species. Stability of carbocation is determined by inductive effect, hyperconjugation and resonance effect. Greater the number of contributing structures more is the stability of a Carbocation. Electron releasing groups (+I effect) increases the stability of a carbocation whereas the electron withdrawing groups (I effect) have an opposite effect.

Which of the following is most stable carbocation?

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