In the UV-visible spectrum of (E)-1,3,5-hexatriene, the lowest energy absorption corresponds to a ________. A) σ to π transition B) σ to π^* transition C) π to σ^* transition D) σ to σ^* transition E) π to π^* transition

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(E)-1,3,5-hexatriene has a long conjugated system of six carbon-carbon double bonds, which allows for π to π* transitions to occur. The lowest energy (longest wavelength) absorption is typically associated with the promotion of an electron from the highest occupied molecular orbital (HOMO) to the lowest unoccupied molecular orbital (LUMO), which in this case is a π to π*^* transition.

In the UV-Visible Spectrum of (E)-1,3,5-Hexatriene, the Lowest Energy Absorption