The rich gets richer, the poor gets poorer. We can say that statement as the Markovnikov's rule. What is Markovnikov's Rule? First let's see the picture as follows:

Why 1-Bromopropane (almost) didn't observed? Why 2-Bromopropane is the dominant production in this addition reaction?

Markovnikov's Rule is our savior in this problem.

We have to know the mechanism reaction of that addition reaction above first.

Markovnikov's Rule is our savior in this problem.

We have to know the mechanism reaction of that addition reaction above first.

See the two carbocations formed in the intermediate state. To stabilize the carbocation, induction and hyperconjugation effect are both needed. The secondary carbocation has 2 induction and 6 hyperconjugation effect but the primary carbocation has 1 induction and 2 hyperconjugation effect.

From the descriptions above, we know that the most stable carbocation in this addition is the secondary carbocation. This is what Markovnikov's rule is.

From the descriptions above, we know that the most stable carbocation in this addition is the secondary carbocation. This is what Markovnikov's rule is.

## No comments:

## Post a Comment