Question Detail

CHM 102 Fundamentals of Amines: Nomenclature, Isomerism, and Synthesis Objective Question

Question

What is the product of exhaustive methylation of a tertiary amine with excess CH₃I?
Options
A Secondary amine
B Tertiary amine (no change)
C Quaternary ammonium salt (R₄N⁺ I⁻)
Correct Answer
D Amide
Correct Answer

Option C is the correct answer.

Detailed Explanation

Tertiary amines react with excess methyl iodide to form quaternary ammonium salts (R₄N⁺ X⁻), which are useful as phase-transfer catalysts.

Hint

Four alkyl groups on nitrogen.

Question Info