Why is a acid anhydride not classified as an ester

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PensAndPaper
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Why is a acid anhydride not classified as an ester

so confused
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Poooky
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Because it's an anhydride? The same way a ester/carboxylic acid aren't classified as ketones.

It has an ester FG but the reactivity of anhydrides will be sufficiently different (to esters) that it has it's own group.
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PensAndPaper
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(Original post by Poooky)
Because it's an anhydride? The same way a ester/carboxylic acid aren't classified as ketones.

It IS an ester, it has an ester FG but the reactivity of anhydrides will be sufficiently different (to esters) that it has it's own group.
haha thank you. For some reason i couldn't get my head round it. But the ester ketone example you gave clicked something in my head haha. Too late for revision thanks
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Serine Soul
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Because acid anhydrides are formed by removing a water molecule from two carboxylic acids while esters are (usually) formed by removing a water molecule from an alcohol and a carboxylic acid :yes:
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PensAndPaper
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(Original post by Serine Soul)
Because acid anhydrides are formed by removing a water molecule from two carboxylic acids while esters are (usually) formed by removing a water molecule from an alcohol and a carboxylic acid :yes:
Thank you )))
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Poooky
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(Original post by PensAndPaper)
haha thank you. For some reason i couldn't get my head round it. But the ester ketone example you gave clicked something in my head haha. Too late for revision thanks
Haha, glad it helped! When is your exam?
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dylan1016
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(Original post by PensAndPaper)
Why is a acid anhydride not classified as an ester

so confused
It has two ester functional groups but the anhydride functional group takes priority according to the IUPAC rules.
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PensAndPaper
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(Original post by Poooky)
Haha, glad it helped! When is your exam?
Tuesday fun fun fun
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