Classification of organic molecules

Cyclic

CH2-CH2
I I
CH2-CH2

Homocyclic

Cycle only formed by only C and H

Heterocyclic

Besides C and H, we find O, S, N, P

Saturated

Unsaturated

linear

branched

linear

branched

Aromatic

-Cyclic structures -Fully conjugated

Alicyclic

Aliphatic

Saturated

Unsaturated

linear

branched

linear

branched

Only single bonds (alkanes)

Double/Triple bonds (Alkane/Alkyne)

CH3--CH3--CH3--CH3

-π e (Hückel's rule): 6, 10, 14, 18, 22

Saturated

Unsaturated

linear/simple

branched

linear/simple

branched

BONDS

C-4

N-3

O-2