Which compound is more reactive in an SN 1 reaction? In each...

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Key Concepts

SN1 Reaction Mechanism

The SN1 reaction proceeds through a two-step process where the first, rate?determining step involves the departure of the leaving group to form a carbocation intermediate. The reactivity in an SN1 reaction depends largely on how readily the leaving group dissociates and how stabilized the resulting carbocation is. This mechanism is sensitive to factors that lower the energy barrier for ionization, such as solvent effects and the nature of the leaving group.

Leaving Group Ability

In an SN1 reaction, the quality of the leaving group is crucial because it directly influences how easily the leaving group can depart, forming the carbocation intermediate. A better leaving group can stabilize the negative charge more effectively once it leaves, thereby increasing the rate of the reaction. When the carbocation stabilities are assumed equal, as in this case, the compound with the better leaving group will typically display greater reactivity in an SN1 reaction.

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