Why is a acid anhydride not classified as an ester

Watch this thread
PensAndPaper
Badges: 3
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#1
Report Thread starter 6 years ago
#1
Why is a acid anhydride not classified as an ester

so confused
0
reply
username2455183
Badges: 18
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#2
Report 6 years ago
#2
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.
1
reply
PensAndPaper
Badges: 3
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#3
Report Thread starter 6 years ago
#3
(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
1
reply
Serine Soul
Badges: 18
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#4
Report 6 years ago
#4
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:
1
reply
PensAndPaper
Badges: 3
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#5
Report Thread starter 6 years ago
#5
(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 )))
0
reply
username2455183
Badges: 18
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#6
Report 6 years ago
#6
(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?
0
reply
dylan1016
Badges: 6
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#7
Report 6 years ago
#7
(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.
1
reply
PensAndPaper
Badges: 3
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#8
Report Thread starter 6 years ago
#8
(Original post by Poooky)
Haha, glad it helped! When is your exam?
Tuesday fun fun fun
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest

How did The Student Room help you with your university application?

Talking to current university students (14)
18.92%
Talking to peers going through the same thing (27)
36.49%
Speaking to student ambassadors from the universities (5)
6.76%
Speaking to staff members from universities (1)
1.35%
Using the personal statement builder, library or helper service (7)
9.46%
Reading articles about what steps to take (15)
20.27%
Learning about/speaking to Student Finance England (2)
2.7%
Something else (tell us in the thread) (3)
4.05%

Watched Threads

View All