Question

multiple choice 2 points which sequence ranks the following isomers in order of increasing boiling points? three chemical structures labeled 1, 2, 3 options: 3<2<1; 2<1<3; 3<1<2; 2<3<1

Explanation:

To determine boiling points, consider intermolecular forces (IMFs):

• Compound 2: Primary amine (–NH₂), can form H - bonds (strong IMFs).
• Compound 1: Secondary imine (no H - bonding, only dipole - dipole and London forces).
• Compound 3: Tertiary amine (no H - bonding, more compact structure, weaker London forces than 1 due to less surface area).

Boiling point order: Weakest IMFs (3) < moderate (1) < strongest (2) → \( 3 < 1 < 2 \).

Answer:

3<1<2