00:01
So we want to know which of these four possible mechanisms is the one that is actually written correctly, making it the valid mechanistic step.
00:09
So let's look at which things are wrong and get us to the one that is correct.
00:13
So this first one, we have the electrons here going into or onto the oxygen atom.
00:20
That is fine, but that would mean that our product would have to include h2o, which it doesn't so we can eliminate this first one.
00:31
And the bromine's also not doing anything, so why is that even there? in this second one, we've got the bromine attaching itself at that positive spot, which would mean this bromine is no longer there.
00:45
That has been used up, so this one is also incorrect.
00:50
The one that is correct is this third one.
00:52
This is the one that's valid because it has everything correct.
00:56
The bromine's attaching, the h2o is being kicked off, so our products are correct.
01:01
And it's drawn correctly...