What is the systematic name for the functional group in esters?

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The main functional group in esters is represented as RCOOR', where R and R' are carbon chains. This group is systematically named as an "alkyl alkanoate," derived from the reaction between alcohols and carboxylic acids. The alkyl portion is sourced from the alcohol, while the alkanoate comes from the acid. The discussion highlights the lack of a widely recognized systematic name for the ester functional group itself, contrasting it with other functional groups like alkoxy and carbonyl. Understanding these naming conventions is essential for clarity in organic chemistry.
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The (main) functional group in esters are:

R_1OOR_2

Where R_1 and R_2 are carbon chain.

When I though about it, I've never heard the systematic name of this functional group. What is this functional group called? I've seen esterbonding etc. but that doesn't sound systematic as ex. alkoxy group, carbonyl group and so on.
 
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The functional group in an ester is
RCOOR'

The esters are named alkyl alkanoates. Since esters can be produced by the reaction between alcohols and carboxylic acids, the alkyl part comes from the corresponding alcohol and the alkanoate comes from the corresponding acid.

IUPAC nomencalture
http://www.acdlabs.com/iupac/nomenclature/93/r93_511.htm"
 
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