108A-1st MidtermF09

108A-1st MidtermF09 - C. F. Bernasconi Chemistry 108A Fall...

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C. F. Bernasconi Chemistry 108A Fall 2009 First Midterm Exam – October 27, 2009 This exam consists of nine (9) questions for a total of 100 points. Write your answers on the exam. Put your name and that of your TA on the front page of the exam. 1. ( 12 points ) Some of the species shown below represent resonance structures. Identify those species and draw as many alternative resonance structures as possible. Using curved arrows, show how the different resonance structures can be converted into each other. (a) (b) (c) (d) H Cl H H H H + CH 2 C CH 3 CCl 2 S _ CH 3 C CH 3 CH 3 + C O Ð O O Ð H
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Chemistry 108A Fall 2009 First Midterm Exam October 27, 2009 Page 2 2. ( 12 points ) Give IUPAC names to the following compounds. Be sure to include E/Z or cis-trans terminology where appropriate. (a) (b) (c) C C CH 3 CH 3 CH 2 CH 2 CH 2 Cl Br (CH 3 ) 3 CCH 2 CH 2 CHCH 2 CH 3 CH 3 H CH 3 CH 3 H 3. ( 12 points ) Which of the following neutral molecules have formal charges on some of their atoms? Show the charges. (a)
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108A-1st MidtermF09 - C. F. Bernasconi Chemistry 108A Fall...

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