Predict the major product(s) of the following...

Transcript

00:01 All right, so let's look at this substrate, and we're reacting with hbr.

00:17 And we need to find the major product, potentially more than one, of this reaction.

00:24 So i think it's useful here to just go ahead and do the mechanism, because that explains why we get the product that we do.

00:31 So this is addition of hbr across the double bond.

00:35 The first thing that happens is this double bond will swing open and attack the hydrogen.

00:41 And the electrons that were between the bromine and the hydrogen will remain on bromine.

00:45 So the first step of this mechanism is that the double bond swings open.

00:50 And we're going to get hydrogen added to one side of this double bond.

00:55 But the other side of the double bond is going to get a carbocation, which means one of these carbons gets a bond to hydrogen and the other carbon gets a carbokadion.

01:06 And so there's two possible ways this can go.

01:09 I'll sketch them both out below.

01:18 We can get hydrogen added to this side and a carbocation here.

01:30 Or we can get hydrogen added to this side and a carbocation here.

01:36 Which of these is more likely? which of these is more stable? this carbocation is secondary and this carbototene is tertiary.

01:45 And we know that carbocadines that are tertiary or more stable.

01:48 So we should expect that this will be the dominant product, right? this is not a stable and we won't form this...

Question

Predict the major product(s) of the following reaction. HBr I II III IV Multiple Choice Only I and II Only II and III Only I and IV Only III and IV

Question

Predict the major product(s) of the following reaction. HBr I II III IV Multiple Choice Only I and II Only II and III Only I and IV Only III and IV

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