00:01
This is the answer to chapter 16, problem number 69, from the smith organic chemistry textbook.
00:09
And this problem asks us, well, this problem says addition of hbr to aline, forms two bromide, one propene rather than three bromal one propene, even though three bromon one propene is formed from an allilic carbocadion.
00:25
Considering the arrangement of orbitals in the alien reaction, explain this result.
00:31
Okay.
00:32
And so basically there are two ways that this reaction could go.
00:39
So we have ch2, c, c, c, h2.
00:44
And so we're told that the way that this reaction does proceed is like this.
00:55
And so the hydrogen adds to the terminal carbon.
01:06
And we have this, uh, final carbocation.
01:13
So the carbocat ion is here.
01:16
And then the bromide ion can attack there.
01:26
And so this is how we get the product that does form the two -broma -one propene.
01:45
Okay.
01:46
So that's what actually happens.
01:48
And so the reaction that doesn't happen to form the 3 -brom -1 propane...