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Organic And Biological Chemistry
The common name for the ester whose IUPAC name is methyl ethanoate is
- a. ethyl methyl ester
- b. methyl acetate
- c. ethyl acetate
- d. no correct response
Interpretation:
Common name for the ester with IUPAC name methyl ethanoate has to be chosen from the given options.
Concept Introduction:
For naming an ester, it can be structurally viewed in a way that contains an acyl group and an alkyl group.
Rules to obtain IUPAC name and common name for an ester:
- Alkyl part appears first in the IUPAC name and it is followed by the acyl part of ester as a separate word.
- Name of the alkyl part in the ester is just a name of R group. It can be alkyl, cycloalkyl, or aryl group.
- Acyl part present in the ester is named by considering the acid name and replacing the suffix “-ic acid” with “-ate”.
- To obtain the common name the alkyl part name is the same while the acyl part name is derived from the common name of the acid by replacing the suffix “-ic acid” with “-ate”.
Reason for correct option:
The structure of methyl ethanoate can be drawn as,
The alkyl and acyl group is identified as shown below,
Alkyl group contains only one carbon atom. Hence alkyl group is named as methyl. The acyl group contains two carbon atoms. The common name of the carboxylic acid that contains two carbon atoms is acetic acid. While giving common name for ester the suffix “-ic acid” is replaced by suffix “-ate”. This gives the name as acetate. The common name of the ester is obtained as methyl acetate...
Chapter 5 Solutions
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