Two isomers of the planar compound 1,2-dichloroethylene are shown here.

(a) Which of the two isomers will have the stronger dipole– dipole forces?

Video transcript

Hey everyone, we're told that one to dye bromo one to declare o methane has two summers and were asked which statement is true. Now looking at our customers, it looks like our first one is going to be our sis since our functional groups are on the same side. So in this case we have our two brahmins at the top and our two chlorine at the bottom. Now looking at our second I summer, it looks like we have the Transit summer since our two functional groups are on the opposite side of one another, so each chlorine is on the opposite side of one another, while each grooming is on the opposite side of one another. Now when we compare these two is Immers, it looks like they want us to look at our dipole dipole forces. And looking at our transit summer, we can see that our disciple forces are actually going to cancel out and that's because our functional groups are opposite to one another. So this means our trans is going to be a non polar compound while our system is going to be polar and that's because our disciple disciple forces on our system er do not cancel out and they are pulling at different directions and different links. So when comparing the dipole dipole forces are cis, summer is going to have the stronger people die people forces and again it's because it is polar, while our trans is non polar, which means it will have weaker dipole dipole forces and since both molecules have the same molar mass, The sis I summer ultimately has the stronger dipole dipole and London dispersion forces than the Trans I Summer. So our answer here is going to be a, the Sis II Summer has a stronger dipole dipole force than our trans. Now, I hope that made sense and let us know if you have any questions.