BRAINCAKEOrganohalogen compounds and the Environment
The ozone layer is found 10 - 40km above the earth's surface in the outer stratosphere. It blocks harmful uv-B radiation from the Sun. In the stratosphere ozone is continually being formed and broken down by uv light. In the steady state, the rate of ozone formation is equal to the rate of ozone breakdown. CFCs and HCFCs were used as refrigerants and aerosol propellants. CFCs are very stable and relatively inert due the strength of the carbon halogen bonds.
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Key terms in this lesson
- homolytic fission
- The breaking of a covalent bond in which each bonding atom takes one electron from the bonded pair, forming two free radicals.
- free radical
- A species with an unpaired electron.
More in Halogenolkanes
- Halogenoalkanes
- Reactivity of Halogenoalkanes
- Nucleophilic Substitution - Hydrolysis
- Reaction with Ammonia
- Elimination
All 6 lessons in Halogenolkanes · All OCR A-level Organic Chemistry topics