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Pearson Edexcel IAL Chemistry 4.7 Homolytic & heterolytic bond breaking

Practise separating homolytic and heterolytic fission by the particles formed and by the electron movement shown in mechanisms.

Syllabus
First assessment 2019
Course
Chemistry YCH11
Level
AS

Exam points

  • distinguish homolytic fission forming free radicals from heterolytic fission forming ions
  • interpret curly arrows as movement of an electron pair when ions are produced

4.7—Bond breaking can be: i homolytic, to produce free radicals ii heterolytic, to produce ions question 1

[Maximum number: 2]

This question is about 2-Chloropropane.

Figure for Question 4.7—Bond breaking can be: i homolytic, to produce free radicals ii heterolytic, to produce ions question 1 — Edexcel A-Level Chemistry AS

2-Chloropropane can be produced by reacting propane with chlorine in a homolytic free radical reaction.

CH3CH2CH3+Cl2→CH3CHClCH3+HCl\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{3}+\mathrm{Cl}_{2} \rightarrow \mathrm{CH}_{3} \mathrm{CHClCH}_{3}+\mathrm{HCl}

Using your answer to (b)(i), state what is meant by the terms homolytic and free radical.
homolytic
free radical

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