Photochemical isomerization of (E,E)-2,4-hexadiene to (Z,E)-2,4-hexadiene is a two-step process in which a photochemically driven intermediate forms and then thermally rearranges to give the product. Draw the structure of this intermediate using wedge-and-dash bonds to denote the appropriate stereochemistry.
(E,E)-2,4-hexadiene
Intermediate
(Z,E)-2,4-hexadiene
H3C
CH3
light
heat
CH3
CH3