Two compounds (labeled I and II) have a liquid crystal state. Predict which compound has a higher temperature associ- ated with the solid to liquid crystal phase change. Explain your reasoning.

Video transcript

Hey everyone, we're asked to consider the substances below that have a liquid crystal state. Which compound will have a solid to liquid crystal phase change at a higher temperature. And why, First? In order to answer this question, we need to look at our inner molecular forces. Starting with compound one, we can see that we have London dispersion forces and dipole dipole forces. Now looking at compound too, we also have London dispersion forces and dipole dipole forces as well. Now comparing these two, how do we know which compound will have a solid to liquid crystal phase change at a higher temperature since they have the same type of inter molecular forces. So our answer here is going to be compound one and the reason why is because it has stronger in our molecular forces since we have a higher molar mass and we have those electro negative atoms attached to our compound, which would be our florins. Now, I hope that made sense. And let us know if you have any questions.