Final Fall '07 Key - Bocknack CH 310M/318M Fall 2007 FINAL...

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Part I Answers & Scoring How to read this table : In the first three columns, you’ll find the question number, the maximum points possible, and the correct answer choice. The columns labeled “A” through “J” indicate the points awarded for the problem if this letter was the choice indicated on the answer sheet. Please check the Blackboard gradebook to see how you answered the Part I questions, and to check your raw score (out of 158 points possible) for Part I of the exam. Part I answer sheets will not be returned, and no regrades are possible on Part I of the exam!!! Question Max. Points Correct A B C D E F G H I J 1 5 J 0 0 3 3 0 1 1 1 1 5 2 5 A 5 0 0 0 2 2 1 0 0 0 3 5 D 0 2 0 5 0 0 1 0 3 1 4 5 I 0 3 0 3 2 0 2 1 5 1 5 5 A 5 0 0 0 0 0 0 0 0 0 6 5 B +5 for B if Q5 = A ; +5 for A if Q5 = B 7 5 E +5 for E if Q6 = B ; +5 for C if Q6 = A ; +5 for B if Q6 = C or D ; +5 for A if Q6 = E or F NO CREDIT FOR ANY CHOICE if Q6 = G or H !!! 8 5 H 0 0 0 0 0 0 0 5 0 0 9 5 A 5 0 0 2 2 0 1 0 0 0 10 5 B 0 5 0 0 0 0 0 0 0 0 11 5 C 0 0 5 0 0 0 0 0 0 0 12 5 E 0 0 0 0 5 0 0 0 0 0 13 5 F 0 0 3 0 0 5 0 0 0 0 14 5 E 0 3 0 0 5 0 0 0 0 0 15 5 A +5 for A if Q13 = A or E or F or G or H or I or J +5 for B if Q13 = B or C or D 16 5 A +5 for A if Q14 = A or E or F or G or H or I or J +5 for B if Q14 = B or C or D 17 5 A 5 0 0 0 0 0 0 0 0 0 18 5 D 0 0 0 5 0 0 0 0 0 0 19 5 A 5 0 0 0 0 0 0 0 0 0 20 5 C 0 0 5 0 0 0 0 0 0 0 21 5 B 3 5 0 0 1 0 0 0 0 0 22 5 A 5 0 0 0 0 0 0 0 0 0 23 5 C 0 0 5 0 0 0 0 0 0 0 24 5 D +5 for D if Q23 = C ; +5 for E if Q23 = A or B +2 for C if Q23 = C ; +2 for G if Q23 = A or B 25 5 A 5 0 0 0 0 0 0 0 0 0 26 5 E 0 0 0 0 5 2 0 0 1 0 27 5 B 0 5 0 0 0 0 0 0 0 0 28 5 C 0 0 5 2 0 0 0 0 0 0 29 5 A +5 for A if Q28 = C or D or G or H +5 for C if Q28 = A or B or E or F 30 5 D 0 0 2 5 0 2 0 0 0 0 31 5 B 2 5 0 0 0 2 0 0 0 0 32 5 B 2 5 0 1 0 1 0 0 0 0 33 5 D 3 3 0 5 1 1 0 0 0 0 34 5 E 0 0 0 2 5 0 0 0 0 0 35 5 A 5 2 0 0 0 0 0 0 0 0 36 5 H 0 0 0 0 0 0 0 5 0 0 37 5 C 0 0 5 0 0 0 0 0 0 0 38 5 F 0 0 0 0 0 5 0 0 0 0 39 5 B 0 5 0 2 0 2 0 0 0 0 40 5 F 0 3 3 1 1 5 0 0 0 0 Bocknack CH 310M/318M – Fall 200 7 FINAL EXAM ANSWER KEY – MWF 9:00 Section
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12 Part II – Write your answers to all questions on this page in the space provided. If you use a pen, only blue or black ink is acceptable!!! PLEASE READ EACH QUESTION VERY CAREFULLY !!! In Questions 41 and 42, one contributing resonance structure of a resonance hybrid is given. Each resonance hybrid has 2 additional important contributing resonance structures. In Question 41, you should draw the relatively more important additional contributing resonance structure in the empty box on the left. Draw the relatively less important additional contributing resonance structure in the empty box on the right. You do not need to judge relative importance of the resonance structures in Question 42. Be sure to show all lone pairs , unpaired electrons , and nonzero formal charges in all of the structures that you draw. Also be sure to follow the additional instructions that are specific to each question. 41. (15 points) Use normal curved arrows to show how electron pairs move to convert the given structure into the more important additional resonance structure. Also use normal curved arrows to show how electron pairs move to convert the more important additional resonance structure into the less important one. Hint : Only one atom should have a nonzero formal charge in each additional resonance structure.
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Final Fall '07 Key - Bocknack CH 310M/318M Fall 2007 FINAL...

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