 Let's start the day with a couple of chair conformation questions, so predicting the more stable structure So let's do that which Conformational isomer is more stable in the chair form of this particular structure. So we have the methyl groups in the one two three Five positions, okay? So if this is difficult for you one good thing to do is to label the positions of the atoms so you'll know that the methyl groups are in those one three five positions And then what you can do is just draw your chair structure and if you really want to you can even draw the chair flip So now we're going to compare the two the two isomers here To conformational isomers when we put the one three and the five in their respective positions Okay, so what I like to do is always label this position as one. So we go one two three four five Six Okay, so the one the three and the five are going to have methyl groups on it and if this is pointed towards us I'll usually put it up So like that and Don't necessarily have to and then the two position has nothing on it The three position has a methyl group on it, but this time it's pointed down So remember up on the chair structure is straight up, okay from the point where it's up So down is not straight down, but in this case to the left there So you can see we've got one axial one equatorial already and then four five so this one is also down up is there axial so this one has to be equatorial Okay, so now we want to count the number of axial the equatorials we got so here. We've got one axial two Okay, let's do the same analysis over here So remember when we do the chair flip and the one position now comes down here Is you're kind of flipping that envelope down like that. So we've got the one there two three four five and six remember when we do the Chair flip it goes from axial to equatorial. So here we've got the axial this one's going to be equatorial like that Metal Three remember axial to equatorial this one's equatorial so it's going to go to axial Axial on the bottom is down like that long bond and Then four five so equatorial appear Axial here Now we ask ourselves how many axials do we have well one two How many equatorials one so remember axials are less stable than equatorial So this one is the less stable structure. This one's the more stable structure So if we wanted to write our equilibrium arrow You like that and I think it's at what's the most stable structure. So We'll do a couple more of these I'm sure you guys will get them pretty soon I Think the hardest thing is to draw the flip the flip Structure So the actual ring Unless your left-handed then it's easy