Draw the condensed structural formula for the cephalin that contains glycerol, two palmitic acids, phosphate, and ethanolamine (ionized).

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Welcome back everyone. Cephalin is also known as phosphatidyl ethanolamine, provide the condensed structural formula of a cephalin containing the following components. Glycerol tumeric acids, a phosphate group and ionized ethanolamine. So, first of all, we're going to begin by drawing the structure of Glycerol. And we have to recall that Glycerol simply contains a three member chain. We have three carbons and those carbons are bonded to hydroxy groups. But in this case, we are going to replace hydrogens from hydroxy groups with Carbonis, right, and also a phosphate. So essentially, we're not adding those hydrogens. We simply want to draw the structure of Glycerol without those additional oxygen hydrogen bonds. Now, the first carbon has two hydrogens, the second one has one hydrogen and the third one has two hydrogens. Each carbon must have four bonds. Now, we want to add tumeric acids. Let's recall that we are forming that ester bond, right? So essentially the next atom we want to add is carbon double bonded to oxygen carbona. So this comes from mistic acid itself. Let's recall the structure of mistic acid and essentially it has her box. So and now it also has 12 ch two units followed by CH three. What we're going to do is simply perform the replacement of hydrogen with carbel. So we are essentially performing a reaction between an acid and an alcohol to produce that ester bond. So we have already drawn Carbel, we simply want to add CH two, 12 times or by CH three. Now, we have two units of mistic acid, we can bond another unit to carbon number two or carbon Number three, we can essentially get two possible structures, right? So let's suppose that for one of the structures for this problem, we're going to bond another unit of mistic acid to carbon number two. So we essentially have to repeat those, see each two groups and see each three. Finally, we have a phosphate group and we want to recall, we want to recall that phosphate essentially consists of phosphorus double bonded to one oxygen. And then we have three single bonded oxygens, right. So now what we're going to do is simply understand that phosphorus is going to bond two oxygen from Glycerol. We are going to draw that double bonded oxygen than one of the single bonded oxygens with a negative charge. And now we have an additional oxygen with a negative charge. We also have an I an ionized ethanolamine. So what is the structure? Well, essentially it has hydroxy group ethanol, right? This is what it stands for. So if we draw the structure of ethanol, that would be ohc two C three. But in this case, one of the hydrogen atoms is replaced with an amino group NH two. Now, if it's ionized, we have to recall that nitrogen is more basic than the oxygen. And therefore, nitro gets an additional hydrogen and a positive charge. So now we can essentially notice that we can combine those two units into a single unit, right, essentially we have a negatively charged oxygen which can expel the oh group from the structure. And then simply speaking, this oxygen is going to bond to CH two, removing the oh part, what we're going to do is simply draw CH two, another CH two unit, we can also add them in pre season and state seeds to two times, but there are not many. So it's OK to write both of them. And then there's NH three with a positive charge. And that would be the possible structure that meets all the requirements given to us in the problem. Thank you for watching.

Draw the condensed structural formula for the cephalin that contains glycerol, two palmitic acids, phosphate, and ethanolamine (ionized).

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Key Concepts

Condensed Structural Formula

Cephalin

Fatty Acids