C2H6 -> C2H4C2H6 -> C2H4 + H2
C2H4 -> C2H2C2H4 -> C2H2 + H2
C2H2 -> C2H3ClC2H2 + HCl -> C2H3Cl
C2H3Cl -> C2H5ClC2H3Cl + HCl -> C2H5Cl
C2H5Cl -> C2H4C2H5Cl -> C2H4 + HCl
C2H6 -> C2H4
C2H6 -> C2H4 + H2
C2H4 -> C2H2
C2H4 -> C2H2 + H2
C2H2 -> C2H3Cl
C2H2 + HCl -> C2H3Cl
C2H3Cl -> C2H5Cl
C2H3Cl + HCl -> C2H5Cl
C2H5Cl -> C2H4
C2H5Cl -> C2H4 + HCl