00:03
This is the answer to chapter three, problem number 13, from the smith organic chemistry textbook.
00:10
And so in this problem, we're asked to consider pantothoic acid, or sorry, pantothenic acid.
00:22
And we're given a ball and stick model.
00:25
And so i think the very first thing to do is to redraw this as a skeletal structure.
00:30
Ball and stick models, i think, are often difficult to look at and sort of a pain.
00:38
Skeletal structures are much cleaner.
00:41
And so that was the first thing i did was redraw this as a skeletal structure.
00:46
And so for a, we're asked to identify all the functional groups in this molecule.
00:52
And so i'm going to work left to right.
00:55
So to begin with, we have two alcohols, the oh groups, then next, we have an amide, which is here.
01:07
And so actually, perhaps it would be better to bracket this, because remember, it's the carbon, double bonded to the oxygen and also bound to a nitrogen that makes it the amide.
01:23
So all three of those atoms are necessary for this functional group.
01:27
And then so likewise, for the carboxylic acid that's located here, that is a carbon double bound to an oxygen and also bound to an oh -h.
01:41
And so this is a carboxylic acid.
01:47
Okay? and so that's a.
01:49
So then for part b of this problem, we're asked, i mean, get the wording right, at what sites, at which sites can panty? pantothenic acid hydrogen bond to water.
02:03
And so the answer is all of those functional groups that we just identified have an oxygen or a nitrogen bound to a hydrogen...