Final_exam_old - CHM 2120 Final Exam December 2007 Alison...

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CHM 2120 Final Exam December 2007 Alison Flynn Time: 3 hours Name: ____________________________________________ Student Number: ___________________________ Circle your section : A (MRN) or B (MNT) Notes: - The final 2 pages contain a periodic table, a table of IR stretching frequencies, and a table of 1 H NMR chemical shifts. These pages may be detached. - A calculator, ruler, and molecular models are permitted - Total number of pages: 15 - Approximate number of points: o The marks are given as a guide and are subject to minor changes GOOD LUCK!
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2 of 15 1. Name the following molecules using IUPAC nomenclature or accepted trivial names: (2 points) a. b. 2. Draw clear structures for the following molecules: (2 points) a. ( Z )-but-2-enal b. Methyl 2-hydroxybutanoate 3. a. Write equations for the following reactions using arrow notation. (2 points) b. Will the reaction favour the starting materials or the products? (1 point) c. Justify your choice. (3 points)
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3 of 15 4. a. Rank the following molecules in increasing order of reactivity with H 2 NEt. (3 points) ________ < _________ < _________ < __________ 5. The following reaction won’t work as shown: a. Show what would happen instead. (2 points) b. How could you obtain the desired product? Show the reagents to be used and the structures of any intermediates. (3 points)
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