Chlorination of Methane H H H一C一H CI-CI heat or light H-CI H H methane chlorine chloromethane hydrogen (methyl chloride) chloride Copyright 2005 Pearson Prentice Hall,Inc. 。 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 Chapter 4 3 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). =>