MDCAT Chemistry MCQ #297

When 1 mole of propanone reacts with phosphorus pentachloride (PCl5), which organic product is formed by replacing the oxygen atom?

MDCAT Chemistry MCQ #297

  1. Question 1

    Q1. When 1 mole of propanone reacts with phosphorus pentachloride (PCl5), which organic product is formed by replacing the oxygen atom?

    • A) 1,2-dichloropropane
    • B) 1,3-dichloropropane
    • C) 1-chloropropane
    • D) 2,2-dichloropropane

    Answer: 2,2-dichloropropane

    Explanation: Reaction with PCl5 replaces the oxygen with two chlorine atoms, forming a gem-dichloride. 1,2-dichloropropane is a tempting vicinal distractor.