1 Organic Chemistry II Final Exam (100pts) Spring 2013 ... - Courses

8. Which set of protons in the following compounds is the least shielded? Please explain your answer. 9. Is science a collection of information, or a process of inquiry? In your answer describe how Luca Turin’s work on the “vibration theory of olfaction” fits in your view of the nature of science. Be expansive in your answer (if you didn’t read the book, use an example from your Plan). 5

10. Deduce a possible structure for the compound (C6H10) with the following IR absorptions: 3040, 2980, 1660 cm-­‐1 . 11. Rank the following compounds in the order of increasing λmax and explain as completely as possible the reasons for your ranking: 12. Polymers and other large molecules are not very soluble in water, but their solubility increases if they contain charged groups. Casein is a protein in milk that contains many carboxylic acid groups on its side chains. Histones are proteins that are essential to the proper function of DNA. They are weakly basic due to the presence of side chains with –NH2 and =NH groups. Explain how the solubility of casein and histones in water varies with pH. 6

13. Which of the following structures is consistent with the IR spectra shown below? Provide a written rationale for your answer. A) B) C) 7

14. Which inter-­‐conversion requires 1 kJ/mol of energy, and which one requires 9.5 kJ/mol? Use a discussion of orbital hybridization and an additional illustration of your own to help explain your answer. 8