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Unformatted text preview: Chemistry 14D Fall 2008 Exam 1 Page 1 For any question on this exam worth three or more points, you have two choices: answer the question as written or you may write and circle the phrase “one point”. If you write “one point” you will receive one point (and only one point) of credit for the question. “One point” overrides anything you have written for that question, regardless of its accuracy. Example: (10) Briefly explain everything about organic chemistry. 1. (2) Circle the letter of the answer that best completes this sentence: In an S N 2 reaction, if the carbon that bears the leaving group has R configuration, then in the product the configuration of this same carbon ... (circle one): (a) ...is always S (b) ...is mostly S , rarely R (c) ...is sometimes S and sometimes R (d) ...is mostly R , rarely S (e) ...is always R (f) ...cannot be determined. 2. (2) The principle cause(s) of inversion in an S N 2 reaction are (circle all that apply): (a) steric hindrance (b) tetrahedral carbon (c) σ * orbital (d) p orbital (e) a good nucleophile (e) none of these 3. (2) The principle cause(s) of inversion in an S N 1 reaction are (circle all that apply): (a) steric hindrance (b) tetrahedral carbon (c) σ * orbital (d) p orbital (e) a good nucleophile (e) none of these 4. (3) DMF is (circle all that apply): Polar Nonpolar Protic Aprotic An ether An alcohol An amide...
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- Winter '08