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Chemistry 14C Course Web Page > Forums > Old Exam and Miscellaneous Questions > Ester and Carboxylic Acids as substituents
 
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richardn90
Registered: 10/20/09
Posts: 18

    10/25/09 at 08:15 PM
Reply with quote#1

Hello all,

When an ester is a substituent of a parent chain, what is the name that is given to the molecule?

For the other functional groups, I know that ketones are given -keto-, aldehydes -aldo-, alcohols -hydroxy-, and amines -amino-, but what about esters? As far as I know, carboxylic acids will always be given the first priority for naming the parent chain, so they will never be a substituent, is this correct? What if there are more than one carboxyl group in a molecule, what do we name the carboxyl group as a substituent then? Please help! Thanks in advance.


Sneha_S
Registered: 10/10/09
Posts: 11

    11/07/09 at 06:00 PM
Reply with quote#2

An ester name has two parts - the part that comes from the acid (propanoate) and the part that shows the alkyl group (methyl).

This website was really helpful with naming, and that's what they said:

http://www.chemguide.co.uk/basicorg/conventions/names2.html
richardn90
Registered: 10/20/09
Posts: 18

    11/08/09 at 11:47 PM
Reply with quote#3

Hello,

What I meant was when an ester is found with a carboxylic acid in the same compound. Since the ester is second in priority to the carboxylic acid, it essentially becomes a substituent for the purposes of naming, right? So, then, what would it be called? Thanks!

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