Organohalogen Compounds in the Environment (OCR A-Level Chemistry A): Flashcards

Molecules with halogen atoms bonded to carbon chains

Stratosphere, 10-40 km above Earth's surface

Absorbs harmful UV-B radiation from the Sun

Strong carbon-halogen bonds make them unreactive

$\ce{C-Cl}$ bond (lowest bond enthalpy)

$\ce{ClO•}$ + $\ce{O2}$

Regenerated in step 2, attacks more $\ce{O3}$ molecules

Approximately 100,000

1987, phased out CFCs to protect ozone layer

Don't contain chlorine atoms