aditia este reactia la legatura multipla, deci alcanii nu participa la asa reactii
alchene:
CH2=CH2 + H2 = CH3-CH3
CH2=CH2 + Cl2 = CH2Cl-CH2Cl
CH2=CH2 + HOH = CH3-CH2OH
CH2=CH2 + HCl = CH3-CH2Cl
alchine
CH≡CH + H2 = CH2=CH2
CH≡CH + HCl = CH2=CHCl
CH≡CH + HOH = CH2=CHOH
CH≡CH + Cl2 = CHCl=CHCl
alcadiene - exces de reactiv
CH2=CH-CH=CH2 + 2H2 = CH3-CH2-CH2-CH3
CH2=CH-CH=CH2 + 2Cl2 = CH2Cl-CHCl-CHCl-CH2Cl
CH2=CH-CH=CH2 + 2HCl = CH3-CHCl-CHCl-CH3
CH2=CH-CH=CH2 + 2H2O = CH3-CHOH-CHOH-CH3
in caz de insuficienta de reactov aditia are loc in pozitia 1,4
