Questions: Which of the following structures is a constitutional isomer of the amino acid valine that contains an amide functional group? [Select all that apply.] A B C D E F

Which of the following structures is a constitutional isomer of the amino acid valine that contains an amide functional group? [Select all that apply.]

A
B
C

D
E
F

Transcript text: Which of the following structures is a constitutional isomer of the amino acid valine that contains an amide functional group? [Select all that apply.] A B C D E F

Solution

Solution Steps

Step 1: Identify the structure of valine

Valine is an amino acid with the structure: \[ \text{NH}_2-\text{CH}(\text{CH}_3)_2-\text{COOH} \]

Step 2: Define constitutional isomers

Constitutional isomers have the same molecular formula but different connectivity of atoms.

Step 3: Identify the molecular formula of valine

The molecular formula of valine is \( \text{C}_5\text{H}_{11}\text{NO}_2 \).

Step 4: Check each molecule for the same molecular formula and amide group

Molecule A: \( \text{C}_4\text{H}_9\text{NO}_3 \) (not a match)
Molecule B: \( \text{C}_5\text{H}_{11}\text{NO}_2 \) (amide group present, match)
Molecule C: \( \text{C}_4\text{H}_{10}\text{N}_2\text{O}_2 \) (not a match)
Molecule D: \( \text{C}_5\text{H}_{11}\text{NO}_2 \) (amide group present, match)
Molecule E: \( \text{C}_5\text{H}_{11}\text{NO}_2 \) (amide group present, match)
Molecule F: \( \text{C}_5\text{H}_{11}\text{NO}_2 \) (amide group present, match)