Is the above circled naming provided correct?

Question

ScanSolve AI Tutor · Accepted Answer

Hey Haruna, let's check this one.

The given structure is:

\text{CH}_3\text{-CH}_2\text{-CH-CH}_2\text{-CH}_3 \\ \qquad \quad \quad \quad \quad \quad \quad \text{|} \\ \qquad \quad \quad \quad \quad \quad \quad \text{COOH}

To name this compound, we follow the IUPAC rules for carboxylic acids:

Identify the functional group.
The functional group is a carboxylic acid ( $\text{-COOH}$ ). This means the suffix will be "-oic acid".
Identify the longest continuous carbon chain that includes the carbon atom of the carboxylic acid group.
The carbon of the $\text{-COOH}$ group is always designated as carbon number 1.
Let's number the chain starting from the $\text{-COOH}$ group:
$\text{CH}_3\text{-CH}_2\text{-CH-CH}_2\text{-CH}_3 \\ \qquad \quad \quad \quad \quad \quad \quad \text{|} \\ \qquad \quad \quad \quad \quad \quad \quad \text{C1OOH} \\ \qquad \quad \quad \quad \quad \quad \quad \text{C2} \\ \qquad \quad \quad \quad \quad \quad \quad \text{C3} \\ \qquad \quad \quad \quad \quad \quad \quad \text{C4}$
The longest chain containing the $\text{-COOH}$ group is 4 carbons long (C1-C2-C3-C4). This makes the parent chain butanoic acid.
Identify and name any substituents.
At carbon C2 (the carbon directly attached to the $\text{-COOH}$ group), there is an ethyl group ( $\text{-CH}_2\text{-CH}_3$ ) attached.
Assemble the name.
The substituent is an ethyl group at position 2. The parent chain is butanoic acid.
So, the correct name is 2-ethylbutanoic acid.

The naming provided in the image is "2-ethylbutahnoic acid". This name is ❌ Incorrect due to a spelling error. The correct spelling for the parent chain is "butanoic", not "butahnoic". However, the structural part of the name (2-ethylbutanoic acid) correctly describes the compound.

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