Concept explainers
Practice Problem 17.1
Give an IUPAC systematic name for each of the following:
(a)
(b)
(c)
(d)
(e)
Interpretation:
The IUPAC name for each given carboxylic compound is to be identified.
Concept introduction:
The carboxylic group
Answer to Problem 1PP
Solution:
Explanation of Solution
a)
Start numbering the chain beginning from the carbon of the carboxylic group.
This chain contains four carbons and so the base name is butanoic acid. In the position-2, it has a methyl group attached. Therefore, the compound is
b)
The numbering of the chain begins from the carbon of the carboxylic group.
This chain contains five carbons. So, the compound belongs to pentanoic acid. Here, in position-3, it has a double bond. Thus, by considering this double bond and its stereochemistry, the compound identified is
c)
The numbering of the chain begins from the carbon of the carboxylic group.
This chain contains four carbons, and so, the name of the compound must be butane. Here, the hydrogen of the carboxylic group is replaced by sodium ion
d)
The numbering of the chain begins from the carbon of the carboxylic group.
This chain contains five carbons, and so, it is pentanoic acid. It has a phenyl compound at position-5. Thus, the name of the compound is
e)
The numbering of the chain begins from the carbon of the carboxylic group.
This chain contains five carbons. So, the name is pentanoic acid. There is a double bond and an ethyl group in position-3. Therefore, by considering the above conditions and the stereochemistry involved, the name of the compound is
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