 Let's do this one now. Which one of the following compounds has the highest energy and the particular confirmation it's in? So You can see in all of these compounds. We have the conformer. So they're all methyl chlorocyclohexanes. This one's one two This one's one three and this one's one four Okay, and we're all we all have we have them all in the conformer where they're both of the Substituents on the cyclohexane ring are in the axial position Okay so here we have in the one two positions of the Substituents is axial now remember when we have axial Substituents that are close to each other they Knock into each other and they have that steric interaction Steric meaning where two things are trying to occupy the same space at the same time So here we have two axial Substituents on carbons that are adjacent to each other, but remember they're on opposite sides of the ring Okay, so if we drew this truck The skeletal formula It would look like that so they're actually not even seeing each other one's pointing up like that and the other one's pointing down So even though they may be big and bulky and flopping on the sides, right? They don't On the axial positions they don't actually hit each other in this conformer. So Here we've got them in the well Whatever one two three positions away from each other. So one two three so they're both down and They're both axial so they're both at the same side of the room on the same side of the ring and they can see each other And they're big and bulky. So what happens? even though they're further away from each other than the one two positions the one Three positions where you got two big axial substituents They actually clash and they don't like to be next to each other because of the steric hindrance. We call that the one three Diaxial Interaction okay, so that's really bad high high energy Okay, so here we have the two substituents and And the one four position, so let's see what they look like When we draw them in the skeletal formula And this one going down Okay, so they don't even see each other so high energy one It's the one with the one three diaxial interaction. We can do a couple more of these if you guys need