Question

which reactions have two molecules colliding in the rate determining step​

Answer 1

Answer:

Sn2 reaction has two molecules colliding in the rate determining step.

Explanation:

Sn2 is a bimolecular reaction in which the overall rate is determined by two separate molecules that are the nucleophile and electrophile collision. The nucleophile attack on the electrophilic C+ center from backside and transition state forms when nucleophile attacks and forms the bond with C+. And when the bond is formed at that time the leaving group leaves and then the final product is formed. Since the reaction is carried in two steps and required the collision of nucleophile with electrophile. Therefore, its rate is determined by two molecules collision.

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