username1753569
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Hi, I have to identify functional
groups in compound: (CH3CH2CO)2O and CH3COH(CH3)2
I think the first one is a ketone but not sure about the second (maybe an alcohol?)
Could someone please write them out, or help me to as I'm a bit clueless. Organic chemistry

CA edit: Moved to Chemistry
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Cave Felem
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#2
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(Original post by slowdive)
Hi, I have to identify functional
groups in compound: (CH3CH2CO)2O and CH3COH(CH3)2
I think the first one is a ketone but not sure about the second (maybe an alcohol?)
Could someone please write them out, or help me to as I'm a bit clueless. Organic chemistry
How do you want us to write them out? I can tell you what they are and you can look them up but I'd struggle to draw them.
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username1753569
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(Original post by Cave Felem)
How do you want us to write them out? I can tell you what they are and you can look them up but I'd struggle to draw them.
If you could tell me what they are I'll research them so I can understand. Thank you!!!
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Reality Check
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(Original post by slowdive)
If you could tell me what they are I'll research them so I can understand. Thank you!!!
Do you know what the functional group of a ketone is, and what an alcohol is? i.e., how would you write the ketone functional group?
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username1753569
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(Original post by Reality Check)
Do you know what the functional group of a ketone is, and what an alcohol is? i.e., how would you write the ketone functional group?
Yeah, ketone is CCOC and alcohol OH.
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Reality Check
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(Original post by slowdive)
Yeah, ketone is CCOC and alcohol OH.
Exactly. And which of those groups can be found in the compounds you've got to identify?
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username1753569
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(Original post by Reality Check)
Exactly. And which of those groups can be found in the compounds you've got to identify?
None haha. Does compound 1 only have an alkyl, whilst compound 2.... hm maybe an aldehyde but I thought you only write that CHO not COH?
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tamoni4
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The first one is an acid anhydride.
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Cave Felem
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(Original post by slowdive)
If you could tell me what they are I'll research them so I can understand. Thank you!!!
CH3CH2CO)2O is propanoic anhydride and CH3COH(CH3)2 is methylpropan-2-ol. Hope this helps!
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tamoni4
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The second one is a tertiary alcohol.
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Reality Check
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(Original post by slowdive)
None haha. Does compound 1 only have an alkyl, whilst compound 2.... hm maybe an aldehyde but I thought you only write that CHO not COH?
You're definitely on the right lines there .

If you look at your second compound, try writing out the structure of it from the information you have: essentially translate it from left to right.

In CH3COH(CH3)2 You've got the following, from left to right:

A CH3
A C, with an OH and 2 CH3

Does the functional group become more obvious in this structure?
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username1753569
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(Original post by Reality Check)
You're definitely on the right lines there .

If you look at your second compound, try writing out the structure of it from the information you have: essentially translate it from left to right.

In CH3COH(CH3)2 You've got the following, from left to right:

A CH3
A C, with an OH and 2 CH3

Does the functional group become more obvious in this structure?
Yes, that's done it! Thank you for your help. The first compound, I can't even remember learning about anhydrides, oh chemistry
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Reality Check
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(Original post by slowdive)
Yes, that's done it! Thank you for your help. The first compound, I can't even remember learning about anhydrides, oh chemistry
You're welcome, and well done It can be a bit of a nightmare, I know, but the trick is working through it systematically like you have just done to arrive at the answer. The more you see these structures, the more you start to categorise them and recognise them as 'acid anhydride', 'carboxylic acid', 'aldehyde' etc.
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alow
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Draw them.
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kirara2807
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It's not a ketone as a ketone has a C=O bond. Whereas the compound in the first one shows a ..... - C = O \ O /.... - C = OThis is an anhydride.. but I'm not sure what the functional group is.... Is the functional group just 'acid anhydride' or something else entirely?
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alow
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(Original post by kirara2807)
It's not a ketone as a ketone has a C=O bond. Whereas the compound in the first one shows a ..... - C = O \ O /.... - C = OThis is an anhydride.. but I'm not sure what the functional group is.... Is the functional group just 'acid anhydride' or something else entirely?
Keep digging.
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jadder1224
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(Original post by slowdive)
Hi, I have to identify functional
groups in compound: (CH3CH2CO)2O and CH3COH(CH3)2
I think the first one is a ketone but not sure about the second (maybe an alcohol?)
Could someone please write them out, or help me to as I'm a bit clueless. Organic chemistry

CA edit: Moved to Chemistry
Hi there!
Probably a bit late but here are the structures (I think)
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alow
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(Original post by jadder1224)
Hi there!
Probably a bit late but here are the structures (I think)
Don't post full solutions. It doesn't help anyone.
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jadder1224
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(Original post by alow)
Don't post full solutions. It doesn't help anyone.
oh right, that makes sense, I'll not do that in the future.
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Artemis06
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(Original post by jadder1224)
oh right, that makes sense, I'll not do that in the future.
Hey I know this is from ages ago but I just wanted to say that what you did really helped me!!
So I don't think posting the full solutions is always a bad thing, since in this case especially, it helped me visualise the structure of the compounds.
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