00:01
Let's draw chair conformers with one ethyl group and one ethyl group, each with satisfying these parts a through e or d.
00:09
So for a, if we draw our chair, let's start with that, we have a one -one die -substituted cyclohexene with an axial c -h2 -c -h3 group.
00:19
So i would draw the axial ethyl group first.
00:23
Axial, for one of these two tips, axial goes straight up.
00:28
The equatorial comes out and down.
00:30
So that's an axial ethane.
00:33
It's a 1 -1 disubstitution.
00:35
So if this is on carbon 1, the other group is a ch3.
00:38
It must also be coming off of carbon 1 and therefore be in the equatorial position.
00:43
It's the only way to draw that.
00:44
You could draw it on any of the other atoms and still be correct.
00:47
This is just the chair of confirmation i chose to draw, and you have to have the ethel group axial.
00:53
For part b, we have a cis 1 -2 dis substitution with the methyl group axial.
00:59
So let's start with the methyl group.
01:03
This is the axial position again...