Chem 140A ternansky Final Fall_06_Blank

Chem 140A ternansky Final Fall_06_Blank - Chemistry 140A...

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Chemistry 140A TOTAL POSSIBLE: 500 Fall, 2006 POINTS MISSED: -______ Final Exam-500 points 12/7/06 TOTAL: DO NOT OPEN THIS EXAM UNTIL INSTRUCTED TO DO SO. ....FILL OUT THE FOLLOWING INFORMATION NOW : . YOUR NAME (Print):_____Ima Key _________________ SIGNATURE: _________________________________________ PID: _________________________________________________ ID checker initials: . BY SIGNING BELOW, I REQUEST AND AUTHORIZE MY FINAL EXAM SCORE AND FINAL LETTER GRADE TO BE POSTED ACCORDING TO MY UNIVERSITY PID ON THE CLASS WEBSITE AUTHORIZATION SIGNATURE: . If you wish to have any answers considered for a re-grade, your exam must be completed in INK ….also, no ALTERED answers will be considered for re-grade.
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1. (5 points) The molecule Al(Br 3 )-N(Me) 3 has a formal charge of A. -1 on N B. -1 on Br C. +2 on N D. -1 on Al 2. (5 points) The maximum number of stereoisomers for the molecule 2,4-dibromo- 3-chloropentane is: A. 0 B. 2 C. 4 D. 8 3. (5 points) The actual number of optically active stereoisomers of the molecule 2,4-dibromo-3-chloropentane is: A. 0 B. 2 C. 4 D. 8 4. (5 points) The following molecule has bond angles closest to 120 o : A. O=C=S B. CHI 3 C. H 2 C=O D. H 2 O 5. (5 points) R-2-bromobutane is dissolved in isopropanol. A new product is observed to form. The chirality at the newly formed chiral center will be: A. R B. S C. neither D. both 6. (5 points) The product formed in question 6 would be A. an alcohol B. an alkene C. an ether D. a halide
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7. (5 points) R-2-bromobutane is reacted with sodium azide in acetone. The major product would be expected to form via which mechanism? A. S N 1 B. S N 2 C. E1 D. E2 8. (5 points) The chirality of the product of the reaction described in question 7 would be: A. R B. S C. both D. can't tell from the information provided 9. (5 points) Isopropanol and 1-hydroxypropane would be best described as: A. constitutional isomers B. conformational isomers C. structural isomers D. two of the above 10. (5 points) Reaction of (2S,3R)-2-bromo-3-methylhexane with water would result in the formation of A. a pair of diastereomers B. an enantiomeric mixture C. a meso compound D. an optically inactive compound 11. (5 points) A reaction that favors the formation of one stereoisomer over the other is called: A. stereospecific B. stereoselective C. regioselective D. enantioselective 12. (5 points) In calculating specific rotation, the pathlength of the optical cell used to contain the solution of the sample bears the following units: A. mm B. cm C. dm D. m
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13. (5 points) Bimolecular reactions will occur most readily in
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Chem 140A ternansky Final Fall_06_Blank - Chemistry 140A...

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