Indicate which compounds contain aldehyde or ketone carbonyl groups.
c. CH₃CH₂–O–CH₂–CHO

Question

Indicate which compounds contain aldehyde or ketone carbonyl groups.

c. CH₃CH₂–O–CH₂–CHO

Accepted Answer

Hi, everyone. Welcome back. Let's look at the next problem. It says, identify whether the compound below is an aldehyde or a ketone. And we have a condensed structure that says cho dash ch two, ch 2-0 dash ch. And then in parentheses, ch three subscript two, we have choice A, the compound is an aldehyde or choice B, the compound is a ketone. Well, if we're rushing, we might be tempted to say ketone as we see this oxygen in the center there. However, let's recall that the common feature with both aldehydes and ketones is that both have that carbonel group C double bonded to an O aldehyde. The carbon has just one R group bonded to it while it has a hydrogen on the other side. And in a ketone that's co double bond, the carbon has R groups on either side, two R groups attached to it. When we look again at akin's structure, that oxygen in the middle, it's not the carbon that has bonds to carbons on either side. It's the oxygen that has bonds to carbons on either side. Whereas in aldehydes and ketones, oxygen just has a double bond to one carbon atom. So this middle group is not an aldehyde or a ketone. That middle group is an ether which has the structure ror prime. So an oxygen bound to two R groups, meaning two carbons. So don't be misled by that. Instead, we'll focus on the oxygen at the beginning, which is in the format cho which when you see that in a condensed structure that you would usually expect to mean in aldehyde. So let's just draw out our skeletal structure to make sure. So we see cho so we do indeed no, that this carbon is bound to a hydrogen and oxygen, there's only one hydrogen there. So HC, so therefore, the bond to the carbon must be a to the oxygen, excuse me, must be a double bond because the carbon has one hydrogen and then one bond to another carbon. So with that HC double von D at the end, we know we have an aldehyde even before we go any farther. And again, in the condensed structure that pretty much always shows up as co at the terminal end of your molecule. So if I were in a multiple choice, if I were on a test and had this, I would pick aldehyde and just move on in the sense of time were short. But we'll just be a little more thorough here and look at the rest of the structure. So we have our aldehyde group and then ch two ch two and then that oxygen oxygen that makes it an ether. And then c and the two methyl groups in parenthesis, stage three subscript two. So that's the entire structure of our molecule. But again, with that, see double bodeau with a hydrogen at the terminal end of the molecule, our answer will be that we have choice. A the compound is an aldehyde. See you in the next video.

Indicate which compounds contain aldehyde or ketone carbonyl groups.
c. CH₃CH₂–O–CH₂–CHO

Verified video answer for a similar problem:

Key Concepts

Aldehyde

Ketone

Carbonyl Group

Indicate which compounds contain aldehyde or ketone carbonyl groups. c. CH3CH2–O–CH2–CHO

Verified video answer for a similar problem:

Key Concepts

Aldehyde

Ketone

Carbonyl Group

Indicate which compounds contain aldehyde or ketone carbonyl groups.
c. CH₃CH₂–O–CH₂–CHO