00:01
Okay, this problem is asking us to decide whether these compounds are considered cis or trans.
00:05
So let's go to this first one.
00:06
Okay, so the substituents in question are not the hydrogens.
00:10
So in this case, it would be the bromine and the chlorine.
00:12
We have to compare these and consider are they on the same side or in different sides.
00:16
So i think that the easy -slash -cheat way to do this is to just look at the hydrogens.
00:21
These hydrogens are both in the axial position.
00:24
They're both pointing straight up.
00:25
Okay, so that means that whatever is connected to that carbon is going to be pointing down.
00:30
Okay, so this bromine pointing down, that chlorine pointing down as well.
00:33
So this one would be cis.
00:34
Okay, and that is all because we just know that those hydrogens are pointing up.
00:37
So whatever is else on that carbon must be pointing down.
00:41
Okay, what about this one? this one, we look at the axial positions.
00:45
So the equatorial positions are a little bit difficult to sometimes understand whether they're up or down.
00:50
So i think the easiest ones are to look at the axial positions.
00:54
So this one, this carbon, has a bromine pointing up...