Цепочки превращения: 1)сh4→ch3cl→c3h8→c3h7cl→c3h6 2)ch4→c2h2→c2h4→c2h5cl→c3h8→c3h6

1)
 CH4+CL2-->CH3CL+HCL
CH3CL + C2H5CL+2Na-->2NaCL+C3H8
C3H8+CL2-->C3H7CL+HCL
C3H7CL-->  C3H6+HCL

2)
2CH4-->C2H2+2H2
C2H2+H2-->C2H4
C2H4+HCL-->C2H5CL
C2H5CL+CH3CL+2Na-->C3H8+2NaCL
C3H8-->C3H6+H2

CH₄ + Cl₂ (hv)= CH₃Cl + HCl

CH₃Cl + C₂H₅MgCl = C₃H₈ + MgCl₂

C₃H₈ + Cl₂ (hv)= C₃H₇Cl + HCl

C₃H₇Cl + KOH (C₂H₅OH)= C₃H₆ + KCl + H₂O

2CH₄ (t)= C₂H₂ + 3H₂

C₂H₂ + H₂ (t,P)= C₂H₄

C₂H₄ + HCl = C₂H₅Cl

C₂H₅Cl + CH₃MgCl = C₃H₈ + MgCl₂

C₃H₈ (Ni,t)= C₃H₆ + H₂