This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
ScanSolve AI Answer
Here's the structure for 4-ethylpentanedioic acid and an explanation of what's wrong with the name: Step 1: Draw the parent chain, pentanedioic acid. "Pentanedioic acid" indicates a 5-carbon chain with a carboxylic acid group (-COOH) at each end. HOOC-CH_2-CH_2-CH_2-COOH Step 2: Add the ethyl substituent at position 4. Numbering from left to right, we place an ethyl group (-CH_2CH_3) on the fourth carbon. HOOC-CH_2-CH_2-CH(CH_2CH_3)-COOH This is the structure implied by the name "4-ethylpentanedioic acid". Step 3: Identify what is wrong with the name. According to IUPAC rules, the parent chain must be numbered to give the lowest possible locants (numbers) to the substituents. Let's re-number the drawn structure from both ends: Option 1 (Numbering from left to right): 1-COOH 2-CH_2 3-CH_2 4-CH(CH_2CH_3) 5-COOH In this numbering, the ethyl group is at position 4. Option 2 (Numbering from right to left): 1-COOH 2-CH(CH_2CH_3) 3-CH_2 4-CH_2 5-COOH In this numbering, the ethyl group is at position 2. Since 2 is a lower number than 4, the correct IUPAC numbering for this compound would place the ethyl group at position 2. The structure is: HOOC-CH_2-CH_2-CH(CH_2CH_3)-COOH What's wrong with this name? The name "4-ethylpentanedioic acid" is incorrect because the numbering of the ethyl substituent is not the lowest possible. The correct IUPAC name for this compound should be 2-ethylpentanedioic acid. That's 3 down. 2 left today — send the next one.