Midterm 1 Key - Chemistry 30C UCLA Winter 2011 Midterm Exam...

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Unformatted text preview: Chemistry 30C UCLA Winter 2011 Midterm Exam I KEY On my honor, I have neither given nor received any aid on this exam Signature: KEY Name: KEY UCLA Student I. D. Number: Question Points --------------------------------------- 1 (22) --------------------------------------- 2 (24) --------------------------------------- 3 (12) --------------------------------------- 4 (21) --------------------------------------- 5 (25) --------------------------------------- 6 Extra Credit (6) --------------------------------------- Total Chemistry 30C, Winter 2011 Name: KEY Page 1 CONCEPTS and THEORY 1. A. (2) Explain why this molecule cannot be resolved into separate enantiomers. N Me Simple amines rapidly undergo inversion, so it is not possible to separate enantiomers. The inversion (like an umbrella flipping) occurs through a planar transition state, so the nitrogen must be sp2 hybridized. B. (5) Rank the reactivity of the following molecules towards electophiles. 1 = Most reactive . 5 = Least reactive NO 2 NO 2 O O N 3 5 2 4 1 C. (5) Rank the basicity of the following molecules. 1 = Most basic . 5 = Least basic NH 2 NH 3 O 2 N NH 2 NH N H EtO 3 5 2 4 1 D. (5) What are the approximate pKas of the following compounds?...
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Midterm 1 Key - Chemistry 30C UCLA Winter 2011 Midterm Exam...

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