 Okay, so let's do this problem. It says, consider the structure of trans 1,4-dimethylcyclohexane. Which statement is fully correct? And then it gives you these four statements here. Trans-methyl groups favor the chair conformation and both are equatorial. Trans-methyl groups favor the chair conformation and both are axial. Trans-methyl groups favor the twist both conformation and trans-methyl groups favor the chair conformation and are axial and equatorial. Can we get rid of any of those choices to begin with? We can get rid of C. Yeah, C. Why is that? Because the twist of both conformation is always the highest energy conformation. Yeah, it's the highest energy so we're going to get rid of that, okay? So let's just cross that off of our list. Okay, so if we look at the other three, it says the chair conformation, the chair conformation. That's the lowest energy conformation. So we need to figure out which chair conformation this 1,4-trans-dimethylcyclohexane is going to be, okay? So let's go ahead and just draw the structure of 1,4-trans-dimethylcyclohexane. So I'm going to draw it as a bond line structure, okay? So like perspective. And then we're going to convert that because we know it's going to be a chair structure, right? So we're going to convert that to a chair. Is that all right? Yeah. So trans, that means 1's up and 1's down like that. Are you okay with this drawing? Okay, cool. So let's go ahead and draw the chair form now, okay? So remember, chair kind of looks like that off keelter bow tie, right? And we're going to label these atoms, we'll just say 1, 2, 3, 4 like that. And remember, if we like to start, at least what I've taught you is 1 being here, okay? So is 1 here? Is that up or down? That is up. Up, like towards us, right? So that's up, okay? And remember, we have these two descriptors like up axial, up equatorial, or down axial, down equatorial, and that's what we're trying to figure out here, okay? So from this perspective, we can determine whether they're up or down, okay? Can we determine this one then, the 1, 4? So it'd be down, right? Okay? So 1 is here, right? Yes. And if it's up, what does that mean? Is it axial or equatorial? Axial. Remember, if the arrow's up, right? So axial is up, right? Yes. So this one up is going to be what? Axial. Axial, right? Let's go to 4, so that's carbon 1, 2, 3, and 4, right? So this one is what? Down. Down, okay? So here, down is going to be what? Axial. Axial, okay? So let's put that in, like that, okay? So two groups, axial. Is that the lowest energy conformation? Yeah. Is that what you know about axial and equatorial? Axial the lowest energy or is that equatorial? Equatorial, right? So it's two groups, axial, is that good conformation? No, it's bad, right? So what we're going to do is do a what? Ring flip, right? So let's do a ring flip, okay? So this is bad, so if we wanted to, we could draw our equilibrium arrows like that. We're going to have to draw our other tear structure like that, okay? So now one is here, right? Yeah. So when we do the ring flip, right? So what did we say? Axial. Axial up, right? And this one's what? Axial down. Axial down. So this one down here, once we do the ring flip, is going to be what? Equatorial. Equatorial up. So how do we describe that? Like that, right? And then so this is one, two, three, four, like that. So this one is axial down. So what's this one going to do? Equatorial down. Equatorial down. Like that. Does that make sense? Yeah. Okay, wonderful. So which one of these is, so remember, chair is the lowest energy confirmation, right? And which one of these two chair confirmations is going to be lower in energy? The one where there's two equatorial or two axial? Two equatorial. Two equatorial. So this one's down here, okay? So trans-methyl groups favor the chair confirmation. Yeah, okay, so they all say that. We got that. Both are equatorial. Is that the right answer? Yes. Yeah, that's the right answer. Well, let's just cancel out the other ones. Both are axial. Is that more favored? No. We already know they're not more favored. So let's cancel that one. And if you've got trans-14, right, can they both, can one be axial and one be equatorial? Look at what we've done here. They're either both what? They're either one or the other. Both axial or both equatorial. So they can't even be like this, right? One can't be axial on the other equatorial. Okay? So the right answer is that one. Are there any questions on this one? No questions. Okay, does it make sense? Yes. Okay.