How does the structure of a fatty acid with a cis double bond differ from the structure of a fatty acid with a trans double bond?

Question

Accepted Answer

Welcome back everyone. True or false. The structure of an unsaturated fatty acid with a trans double bond has a kink at the double bond side, correct the statement if it is false. So basically what we want to do is simply look at double bonds, we want to look at trans, double bonds and S double bonds where trans configurations, we want to make sure that our alk groups are on opposite sides relative to the double bond. While hydrogens are also on opposite sides, that would be trans or since, however, we experience a phenomenon which we can call a kink of structure. That's because the two hydrogen atoms are on the same side of the double bond and the two alky groups are also on the same side of the double bond that would be sis. So as we can see, we can only observe kinks what this says configuration because trans gives us the same straight chain structure as we have in saturated fatty acids, except from the fact that we have that additional pi bond, right? So we don't have those kings, we can only have kinks in cis stereo chemistry. So the statement is false. And now we want to correct it, we can essentially replace Grand wet sis. So we can just cross out tr and replace it with C and this will give us the correct statement. So the answer to this problem is false and the correct statement would be the structure of an unsaturated fatty acid with C double bond has a kink at the double bond side. Thank you for watching.

How does the structure of a fatty acid with a cis double bond differ from the structure of a fatty acid with a trans double bond?

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Key Concepts

Fatty Acid Structure

Cis and Trans Double Bonds

Physical Properties and Health Implications