Алкены
C2H5OH + to, кат. => H2C= H2C + H2O
2CH2 + to, кат. => H2C= H2C + 2H2
C3H6Br2 + Zn => C3H6 + ZnBr2
H2C= H2C + H2 =>C2H6
H2C= H2C + Br2 => C2H4Br2
H2C= H2C + HOH + to, p, кат. => C2H5OH
H2C= H2C + HBr => C2H5Cl
H2C= H2C + O + H2O + кат. => C2H4(OH)2
nH2C= H2C => (-CH2-H2-)n