Active-learning Questions (completed individually)

1.  What is a conjugated unsaturated system? In other words, what is meant by the term conjugated unsaturated? Provide 3 point-form statements.
2. Use the molecular orbital and the resonance theories to describe the structure of the allyl radical. For each theory provide a series of structure drawings, as well as an illustration of the overall structure of the radical. Label the drawings with arrows to identify the important components, and use short point-form statements to describe what is happening in each drawing.
3. According to the molecular orbital approach, why is the allyl radical stable (2 point-form statements)?  According to the resonance theory, why is the allyl radical stable (2 point-form statements)? 
1.  What happens when a substance absorbs ultraviolet or visible light? Provide a diagram in your description. Do not forget to provide the relationship between the energy gap and the wavelength of light absorbed.  Maximum 2 point-form statements.
2. What does the spectrophotometer measure and what does it produce? Do not describe the process occurring within the instrument itself.  Maximum 2 point-form statements.
3. Draw and describe the absorption spectrum and its three characteristics. Maximum 4 point-form statements.

Portfolio Questions (completed individually)

5. Draw structures and provide the names of A, B and C in Figure 4 below.  Show your work.

6. Using Figure 5 below: 
1. Identify the spectrum of a conjugated unsaturated molecule.  Explain your choice.
2. Identify the spectrum of an unconjugated unsaturated molecule.  Explain your choice.
3. Which spectrum is that of a colored compound? What is the color of the compound? Explain.