Why do pimary alkyl halides typically undergo SN2 substitution reactions mor rap

Question

Why do pimary alkyl halides typically undergo SN2 substitution reactions mor rapidly than do secondary or tertiary alkyl halides? nmany al halides art most Suite ble fur Snz becare More stable carbocations react slower than less stable carbocations. Why, then, de SN reactions that produce more stable carbocations occur faster? Why should care be exercised in handling concentrated acids such as HSO, ard HBr Th Conantrakd aids Snould be handfecd win ca ecausethu are 1 cerosive. Thganould not be i Why should refiux of the reaction mixture be gendle with the condonsation ring remains

Explanation / Answer

Since first question has been already solved correctly , let me help you out with the next one.

SN1 reactions are unimolecular nucleophilic substitution reactions that occur in two steps. In the first step formation of carbocation occurs , and in the second step nucleophile attacks the carbocation to form the product.

The first step is the rate determining step , so stable the carbocation , easier will be its formation , and hence faster the step. This leads to overall increase in rate of reaction.

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