Chem 442 Homework Set #10 DUE: Wednesday, November 19, 2008 1) McQ&S, 10-18 2) McQ&S, 10-20 3) McQ&S, 10-23 4) The lowest energy electronic transitions in ethene (C2H4) and benzene (C6H6) occur at 28,700 and 29,510 cm-1, respectively. Using Hückel theory, determine the value of β(in cm-1) for both molecules (assuming that the lowest energy electronic transition in each molecule occurs between the highest occupied and lowest unoccupied πorbital). How well did Hückel theory work, i.e., are your two values for βsimilar? 5) Using the energy formula expression in problem 10-43, calculate the lowest energy electronic transition in 1,3-butadiene and 1,3,5-hexatriene using the
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