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Ch.12 - Solids and Solid-State Materials

Chapter 12, Problem 68

State whether each of the following compounds is likely to have a liquid crystalline phase. Explain your reasoning. (a)

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Hey everyone, we're asked to determine if the substance shown below will have a liquid crystalline face, justify your answer first. Let's go ahead and think about the general structure of a liquid crystal molecule and we can go ahead and compare this to our molecule given right here. We've learned that these are elongated organic molecules and as we can see, our substance definitely fits that description. They also have rod like shapes which we do see in our substance shown. Another feature is that it usually contains a planer ring which is a six member carbon ring, with each carbon atom being sp two hybridized with tribunal planer geometry, which we do see in our substance as well. And lastly, we have a plain and flat surface that allows stacking an ordered arrangement of the molecules which we also see in our substance shown above. So it looks like our answer here is going to be yes. Since our structure here fits the criteria that we listed for a liquid crystal molecule. Now, I hope that made sense. And let us know if you have any questions