In SN2 reaction, which of the following species is formed?

Explanation

Option A: In an SN2 reaction, a transition state is formed. The transition state represents the highest energy point in the reaction pathway where the reacting molecules are partially bonded and partially dissociated. It is a fleeting, high-energy species.Option B: In SN2 reactions, an intermediate species is not formed. The reaction proceeds via a concerted mechanism, meaning there is no stable intermediate species formed during the reaction.Option C: Carbocations (positively charged carbon ions) are not formed in SN2 reactions. Carbocations are more commonly associated with SN1 (substitution nucleophilic unimolecular) reactions.Option D: Carbanions (negatively charged carbon ions) are also not formed in SN2 reactions. Carbanions are more commonly involved in reactions such as nucleophilic substitution in certain cases, but not in the SN2 mechanism.