Chlorination of Methane H H一C-H CI-CI heat or light H- H-CI H H methane chlorine chloromethane hydrogen (methyl chloride) chloride 201 Peasn Eamon re Requires heat or light for initiation. The most effective wavelength is blue,which is absorbed by chlorine gas. Many molecules of product are formed from absorption of only one photon of light(chain reaction). 2013 Pearson Education,Inc. Chapter 4 3© 2013 Pearson Education, Inc. Chlorination of Methane • Requires heat or light for initiation. • The most effective wavelength is blue, which is absorbed by chlorine gas. • Many molecules of product are formed from absorption of only one photon of light (chain reaction). Chapter 4 3