Atentie !! se cere cate alchene posibile putem scrie cu aceasta Fm = C6H12 , asadar nu intra in discutie cei de functiune.
1. pozitie
C=C-C-C-C-C ,
C-C=C-C-C-C = cis + trans
C-C-C=C-C-C = cis + trans
2. de catena
C=C(C)-C-C-C
C=C-C(C)-C-C = levo (-) + dextro(-)
C=C-C-C(C)-C
C=C(C)-C(C)-C
C=C-C(C)2-C
C-C(C)=C-C-C
C-C=C(C)-C-C cis + trans
C-C=C-C(C)-C cis + trans
C-C(C)=C(C)-C
eu am gasit 18 posibili..... sper sa nu fi sarit ceva....