alcooli nesaturati si comp. carbonilici sunt izomeri de functiune
=> F.m. generala = CnH2nO
notam omologul inferior CaH2aO
notam omologul superior CbH2bO
stim ca b = a+1
=> omologul superior CbH2bO = Ca+1H2(a+1)O = Ca+1H2a+2O
2x moli omolog inferior CaH2aO
3x moli omologul superior Ca+1H2a+2O
100% amestec omologi ............................ 30,53% O
[2x(14a+16) + 3x(14a+30)] g amestec............................ 80x g O
=> 28ax + 32x + 42ax + 90x = 262x /:x
=> 28a+32+42a+90 = 229,28
=> a = 2
=> omologul superior Ca+1H2a+2O = C3H6O
carbonilici:
C-CO-C
C-C-C=O
alcooli:
C=C-C-OH
=> 3 izomeri stabili carbonilici si alcooli