(b) (10 points) Only the central linear section of 1,6- diphenyl-1,3,5-hexatriene is mod- eled as a particle in a box, 6 electrons participate in the conjugation, and two electrons fit on each PIB energy level. what is the wavelength of light in nm that is absorbed or emitted by this molecule?

(c) (20 points) 1,6- diphenyl-1,3,5-hexatriene can react with both compounds that are electron donors (D) or electron acceptors (A). Using our particle in a box model, label and justify the locations on the molecule that you most expect to be sites of reactivity with D and A molecules. Explain your reasoning using a graph.

2. 1,6- diphenyl-1,3,5-hexatriene is a conjugated organic molecule that absorbs light in the ultraviolet region of the UV-visible spectrum and is shown below. (a) (5 points) Why can we use particle-in-a-box quantum mechanical expressions to model the behavior and properties of 1,6- diphenyl-1,3,5-hexatriene