2 carbon atoms in the alkanoic acid chain acetic acid ethanoic acid Step 3.

Ester name ethanoate. B Name this alkanoic acid. The ester is therefore butyl propionate or butyl propanoate. I have colour-coded the structure and name to show how they are related.

The structure of ethyl ethanoate is. It is an isopropyl group. Notice that the ester is named the opposite way around from the way the formula is written.

Esters feature a carbon-to-oxygen double bond that is also singly bonded to a second oxygen atom which is then joined to an alkyl or an aryl group. The two organic radicals which are often carbon chains labelled R 1 and R 2 in the diagram at the top of this page are also identified in the name of the compound. A Identify the alkyl chain making up the carboxylic acid.

A sharp boiling point is an indication of the purity of the ester. A Identify the alkyl group that has replaced the H of the carboxylate group. The formula for ethyl ethanoate is.

Thus CH 3 COOC 2 H 5 is named ethyl ethanoate by the rules laid down for IUPAC nomenclature for esters. The standard system for naming esters uses the suffix -oate to indicate that a molecule is an ester. From the IUPAC rules the ester will take its first name from the prefix of the alcohol in this case ethyl and the second name from the acid in this case it is ethanoate.

First the alcohol part is named and then followed by the acid part. SECOND from alcohol from acid O methyl CH3 OC CH3 ethanoate acetate IUPAC. The most commonly discussed ester is ethyl ethanoate.