H Chlorination of Methane HA heat or light H-C-H CI H--C-CI HCl Requires heat or light for initiation The most effective wavelength is blue, which is absorbed by chlorine gas Lots of product formed from absorption of only one photon of light (chain reaction Chapter 4Chapter 4 3 Chlorination of Methane • Requires heat or light for initiation. • The most effective wavelength is blue, which is absorbed by chlorine gas. • Lots of product formed from absorption of only one photon of light (chain reaction). => C H H H H + Cl2 heat or light C H H H Cl + HCl