Get C2 H4 CL2 = dce = 1,2-dichloroethane; ethylene dichloride Get C2 H5 CL = mce = chloroethyl group Get C3 H6 CL2 = cp2 = 1,2-dichloro-propane Get C6 H CL5 = 5cl = 1,2,3,4,5-pentachlorobenzene Get C6 H3 CL3 = tcz = 1,3,5-trichloro-benzene Get C6 H4 CL2 = yan = 1,2-dichlorobenzene