which of the following carbanion is most stable?
Answers
the alkyl group is electron releasing group
thus the presence of alkyl group would intensify the negative charge of the carboanion....
thus methyl(CH3) has 3 H attached to negative C ...thus is more stable as compared to tert butyl carbonanion as it has 3 CH3 groups attached....
An other way to explain is that a Tertiary carbanion is more reactive than a primary.....
(Tertiary means when 3 carbon are attached to a single carbon and primary means a single carbon attached to the carbon)
thus the stability order is as follows:-
A>B>C>D
Answer:
The methyl carbanion ⁻CH₃ is most stable carbanion.
Therefore the option (A) is correct.
Explanation:
Carbanion is negatively charged species in which carbon creates three bonds with atoms.
One negative charge is already present on carbanion. So if electron rich group attached to the carbon. It will intensify the negative charge on carbon and lead to instability of carbanion.
- In methyl carbanion ⁻CH₃, central carbon is bonded to three hydrogen. Therefore it has least negative charge on it. So, it is most stable carbanion.
- On the other hand, tertiary carbanion option(D) it has three methyl group attached to central carbon. So, carbon has very high electron density on it. Therefore tert-butyl carbanion is found to be most reactive. So it is least stable among the all given carbanions.