2 4-hexadienal (e e)- July 8, 2019 16 32 64 128 2 4 hexadienal e e )- E e )- 2 4 hexadienal boiling point E e 2 4 hexadienal density 2 4-hexadiene 2 4-hexadiyne 2 4-hexadiene structure 2 4-hexadiene structural formula