The Reason for Handedness in Molecules: Chirality Note:Carbons in-CH2,-CH3,C=O,C=C,and C=C groups cannot be chirality centers denotes a chirality center CH3 CH3 CH2 H3 H3C CH3 CH2 Carvone (spearmint oil) Nootkatone (grapefruit oil) ▪ Note: Carbons in –CH2 , –CH3 , C=O, C=C, and C≡C groups cannot be chirality centers ▪ * denotes a chirality center The Reason for Handedness in Molecules: Chirality