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Multiple Choice
Give IUPAC name for the following dicarboxylic acid.
A
3-ethylheptanedioic acid
B
5-ethylheptadioic acid
C
3-methylhexadioic acid
D
5-ethylhexanedioic acid
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Verified step by step guidance
1
Identify the longest carbon chain that includes both carboxylic acid groups. In this structure, the longest chain has 7 carbon atoms, making it a heptane derivative.
Number the carbon chain starting from the end closest to a carboxylic acid group to ensure the lowest possible numbers for the substituents. In this case, start numbering from the left.
Identify the substituents on the main carbon chain. There is an ethyl group attached to the third carbon atom of the chain.
Combine the information to name the compound. The base name is 'heptanedioic acid' because it is a seven-carbon dicarboxylic acid. The ethyl group is on the third carbon, so it is named as '3-ethyl'.
The complete IUPAC name of the compound is '3-ethylheptanedioic acid'.