In this video, let's talk about waxes. Now, waxes are simple lipids composed of a long chain alcohol and a long chain fatty acid. The fatty acid and the alcohol are attached by an ester bond. If we take a look, here, here is our ester bond. Well, this part here is our ether bond where we have our carbon connected to an oxygen. And then here we have our long chain alcohol. And then overall here on this side, we have our fatty acid. Remember that we have our lipids, which are broken down into our fatty acids and steroids underneath fatty ass is when we break it down further, we have our waxes. We also have these three other classifications that lie below fatty acids, but we're not concerned with them for now. But right now, we're looking at waxes themselves which again, we have an ester bond that's connecting together our fatty acid and our long chain alcohol. Now, here we're going to say here that waxes possess a repellent type of properties or repellent properties. And we're gonna say here they form protective coatings on feathers of birds and leaves of plants. All right. So here just remember when it comes to waxes, they are a further classification, a more specific classification of fatty acids themselves. And when we talk about them, we're looking at an ester bond connecting a fatty acid and a long chain alcohol.
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Waxes Example 1
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Video transcript
For this example, it says provide a structure of bees wax, it's containing Marisol alcohol and palmitic acid. So step one says draw the structure of the alcohol in its condensed form as well as the fatty acid. We're gonna place an oh of alcohol next to the carboxyl group of the fatty acid. Now, let's just do that first. So here acid is CH three and we're gonna say here that it has 29 of these ch two groups. We're gonna do 28 of them together, the 29th 1, we're gonna have it branch off and then it's connected to the oh group. Now we need to draw the fatty acid, which is palmitic acid. Pic acid represents a saturated fatty acid. And if we recall our memory to one, it is that Laurie Mystic Palace stores art. And we're gonna say here that Laurie L MP S and a Palace stands for Palmitic Acid. This memory tool starts off at 12 carbons and goes up to 20 and we're gonna have 1416, 18. So palmitic acid is a fatty acid that's unsaturated and it has a total of 16 carbons. The first carbon is part of the carbolic acid. That's 123456789, 1011, 1213, 1415, 16. Ok. So that's 16. So we've done that part now it says instead of, oh on alcohol, we're just gonna draw an O this is gonna help later on we connect these two together and we're gonna say do not draw oh on fatty acid. So let's remove this. Oh, so we have these two fragments. Step two is we're gonna form the ester bond. So we're gonna draw a bond between o of the alcohol and the carbonyl C of the fatty acid. So connect these two together, this oxygen with this carbon carbon here and we'll have our bees wax. So let's write this out. So we have ch three connected to 20 of these ch twos connected to one more ch two then o which is gonna be connected. So the carbon carbon. So remember it's 16 carbons. So 2468, 1012, 1416. So that's 16. So this would represent our bees wax. We've combined the alcohol with our unsaturated fatty acid. In order to make this particular type of wax, they're connected together through an tra bond.