CH2=CH-CH2-CH=CH2 +10[O] ⇒ HOOC-CH2-COOH + 2CO2 + 2H2O
CH3-CH=CH-CH=CH2
CH2=C(CH3)-CH=CH2
HC≡C-CH2-CH2-CH3
CH3-CH≡CH-CH2-CH3
HC≡C-CH(CH3)-CH3
ciclopentena ; metilciclobutena ; dimetilciclopropena
.... se obtine acid malonic ,doar,prin oxidarea 1,4 pentadienei - 2 moli