2CH≡CH ―(t°, xt NH₄Cl, CuCl)→ CH≡C−CH=CH₂
CH≡C−CH=CH₂ + H₂ ―(t°, xt Pd)→ CH₂=CH−CH=CH₂
CH₂=CH−CH=CH₂ + Br₂ → CH₂Br−CH=CH−CH₂Br
CH₂Br−CH=CH−CH₂Br + H₂ ―(t°, xt Ni)→ CH₂Br−CH₂−CH₂−CH₂Br
CH₂Br−CH₂−CH₂−CH₂Br + NaOH ―(t°)→ HO−CH₂−CH₂−CH₂−CH₂−OH
HO−CH₂−CH₂−CH₂−CH₂−OH + CuO ―(t°)→ O=CH−CH₂−CH₂−CHO
O=CH−CH₂−CH₂−CHO + 4Cu(OH)₂ + 2NaOH ―(t°)→ NaO−CO−CH₂−CH₂−COONa + 2Cu₂O + 6H₂O
NaO−CO−CH₂−CH₂−COONa + 2NaOH ―(t°, CaO)→ CH₃−CH₃ + 2Na₂CO₃
C₂H₂ + H₂O ―(t°, xt HgSO₄)→ CH₃CHO
CH₃CHO + 1/2 O₂ ―(t°, xt Mn²⁺)→ CH₃COOH
2CH₃COOH + C₂H₄(OH)₂ ―(t°, H₂SO₄ đ)→ (CH₃COO)₂C₂H₄ + 2H₂O
(CH₃COO)₂C₂H₄ + H₂O ―(t°, H⁺)→ CH₃COOC₂H₄OH + CH₃COOH
CH₃COOC₂H₄OH + H₂O ―(t°, H⁺)→ C₂H₄(OH)₂ + CH₃COOH