heat CH3CH3 Cl CHrCHCI HCl or light Chloroethane(氯乙烷) CH3 CHCI2 HCI Cl2 1.1-Dichloroethane CH3 CH,CI CICH2CH2CI HCI 1.2-DichloroethaneCH3 CH3 + Cl 2 heat or light CH3 CH2 Cl + HCl Chloroethane (氯 乙 烷 ） CH3 CH2 Cl Cl 2 CH3 CHCl 2 + HCl 1,1-Dichloroethane ClCH2 CH2 Cl + HCl 1,2-Dichloroethane