What is the difference between SN1 reaction and SN2 reaction?
SN1 goes through a carbocation in two steps (favoured by 3° substrates); SN2 is a one-step backside attack (favoured by 1° substrates).
SN1 goes through a carbocation in two steps (favoured by 3° substrates); SN2 is a one-step backside attack (favoured by 1° substrates). A reliable way to keep them apart is to focus on what each one is defined by, not just the similar-sounding words.
Key point
SN1 reaction vs SN2 reaction
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