00:01
In this problem, we're starting with this alkyne.
00:03
So we see a triple bond between carbons.
00:06
We're told this reacts with hydromic acid.
00:10
And when we do that, we get this alkyne with a bromine attached.
00:21
And here you're asked for the mechanism.
00:24
So this is going to explain how the electrons move, such that we go from this to this to this.
00:30
So in other words, you can think of it like a proof.
00:32
So in math, when we have a proof, we have a principle that we know is true, and the proof shows why it's true.
00:39
It's the same thing here.
00:41
So first, we're going to be being a pair of electrons here and grabbing a hydrogen.
00:49
Now, when we do that, that creates a bond between hydrogen and bromine, and these electrons move on to bromine...