00:01
So here in this case we need to identify the most stable conformation, most stable conformation of the compound which is called butane.
00:16
So we will be considering more stable confirmation of the butane.
00:19
So what is happening? let us see this butane.
00:23
First we will be starting with this gouge confirmation.
00:26
So gouge confirmation, it is a conformation that is having angle -islegged.
00:32
Either 60 or 120 degrees.
00:34
So let us say what does it means? let us say this is a carbon.
00:39
This is a carbon c2 and here this is a ch3 group.
00:43
Here it is a hydrogen and here it is hydrogen.
00:48
And let us say this carbon c3, here it is c3 carbon and here as we are making this gouch confirmation we can say this is ch3 group, this is hydrogen group and this is hydrogen group.
01:01
So it's a couch conformation and theta it is equal to 60 degrees.
01:05
So there is a repulsion between them so it is not so stable.
01:08
Then we see this totally eclipsed, totally eclipsed conformation.
01:13
So let us see this totally eclipsed conformation.
01:17
It is like this, it is ch3.
01:19
Here it is h and here it is h.
01:22
And here it is this and here it is ch3, here it is h and here it is h.
01:27
Here the teta it is 0 and there is a maximum repulsion...