00:01
Okay, we're just to explain what prevents the double bond from rotating, or what bond prevents it.
00:06
And we know that sigma bonds are the first to form between structures.
00:12
So if we compare, or between atoms.
00:15
So if we compare butene with butene, or one butene, if you look at this carbon, we have a sigma bond.
00:23
But over here we have a sigma bond and also a pi bond as well.
00:28
And this pie bond prevents the rotation.
00:32
And it also prevents rotation in triple bonds as well.
00:35
The only difference between an al -kean and al -kine is that we're going to have an extra pie bond.
00:41
So it's going to be even more difficult to rotate.
00:45
If you look here, this can easily rotate...
