Which of the following haloalkanes has the highest boiling point?
Answer and explanation
Correct answer: D.
- Step 1: For a given alkyl chain, boiling points of alkyl halides are governed primarily by the magnitude of London dispersion (van der Waals) intermolecular attractive forces.
- Step 2: Dispersion forces increase with increasing atomic mass, electron count, and polarizability of the halogen atom.
- Step 3: The polarizability sequence is , making 1-iodobutane possess the highest boiling point ( vs for bromide, for chloride, and for fluoride).
Answer
.
Why not the others: 1-Chlorobutane has lower polarizability; 1-Bromobutane has lower molecular weight and polarizability than 1-iodobutane; 1-Fluorobutane has the lowest polarizability and boiling point.
Practise more Haloalkanes and haloarenes.
Free questions with an explanation for every one, and full timed JEE Main mock tests.
More Haloalkanes and haloarenes questions
- What is the stereochemical outcome when optically pure (2R)-2-bromobutane undergoes an nucleophilic substitution reaction with aqueou…
- Which of the following alkyl halides reacts FASTEST via an nucleophilic substitution mechanism?
- The reaction of an alkyl chloride with sodium iodide in dry acetone to prepare an alkyl iodide is known by which name?
- Why does the reaction of an alkyl halide with alcoholic potassium cyanide () predominantly yield an alkyl cyanide (…
- When 2-bromobutane is heated with alcoholic potassium hydroxide (), what is the major organic alkene product according t…
- Which of the following factors is primarily responsible for the extremely low reactivity of chlorobenzene toward nucleophilic substitution c…