Determine whether the two structures in each of the following pairs represent constitutional isomers, different conformations of the same compound, or stereoisomers that cannot be interconverted by rotation about single bonds.
So, now here we've got two different chair confirmations where we have an ethyl group and a methyl group on both of them and guys if you notice our methyl group up here is axial and then it goes to equatorial, still pointing up, but then over here we've got an equatorial, right? Going up for the ethyl group but then over here we the equatorial going down, so these were both pointing up at one point, right? These were cis together but now they're trans, right? Other than that this should be the same, so what does that tell me? that tells me that these are stereo isomers, right? Because of the way, we have the same conductivity but different arrangement in space, okay? So let's move on.