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Question

Pick out the facts regarding SN2 reactions:

A
It is a second order reaction
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B
It happens in two-steps
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C
It proceeds via the formation of a five-membered transition state
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D
Stereochemical inversion of configuration is possible
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Solution

The correct options are
A It is a second order reaction
C It proceeds via the formation of a five-membered transition state
D Stereochemical inversion of configuration is possible

SN2 reactions are single-step reactions which follow second order kinetics. In these type of substitutions, the incoming nucleophile interacts with the alkyl halide causing the carbon-halide bond to break and a new bond is formed between the carbon and the attacking nucleophile. These two processes take place simultaneously in a single step and no intermediate is formed. The product formed will have an inverted configuration compared to the reactant.


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