STUDY GUIDE 5, SELF TEST 1

© Department of Physics, University of Guelph.

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1. Which of the following p -electron configurations are possible in energy levels of a linear molecule?

(a), (b), (c) (d) (e)

2. Which of the following p-electron configurations are possible in energy levels of a circular molecule?

(a), (b), (c) (d) (e)

3. What is the energy of the lowest completely empty p -electronic level in the 1st excited state of 1, 3, 5, 7 - octatetraene? Assume carbon-carbon bond length to be 0.15 nm.

4. What is the energy of the highest filled p-electronic level in the ground state of benzene? (C-C bond length = 0.15 nm.) Note that in this problem the length of the circumference = bond length X number of bonds. In all ring systems such as the porphyrins (see p46 in the text) the number of bonds will equal the number of atoms in the circle, which is also equal to the number of p electrons.

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