2. (20pts) Please apply the PIB model to the following molecule, looking only at the conjugated pi-bond system. Determine the lowest energy absorbance that this molecule could possibly have. Hint: you need to determine the total pi electrons, use homo-lumo theory, then apply PIB model. You may assume that each bond length in the conjugated pi system is 1.4 angstroms, and that the bond angle is 120 degrees. 2. (20pts) Please apply the PIB model to the following molecule, looking only at the conjugated pi-bond system. Determine the lowest energy absorbance that this molecule could possibly have. Hint: you need to determine the total pi electrons, use homo-lumo theory, then apply PIB model. You may assume that each bond length in the conjugated pi system is 1.4 angstroms, and that the bond angle is 120 degrees