Examples ■Alkenes C=C ■Alkynes C三C ■Aromatic C6H6 0 0: Aldehydes and ketones C=0 ■Alkyl halides RX Examples ◼Alkenes C=C ◼Alkynes C三C ◼Aromatic C6H6 ◼Aldehydes and ketones C=O ◼Alkyl halides RX