Exam1 - CHM2120A Organic Chemistry II Exam 1 Name_ Version...

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CHM2120A Organic Chemistry II Exam 1 Version A Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question 1) Which compound would you NOT expect to be aromatic? A) I B) II C) III D) IV E) V 1) 2) S N 1 reactions of the following type, Nu: - + R-X R-Nu + :X - are favored: A) by the use of tertiary substrates (as opposed to primary or secondary substrates). B) by increasing the concentration of the nucleophile. C) by increasing the polarity of the solvent. D) by use of a weak nucleophile. E) by more than one of the above. 2) 3) Which compound(s) would be produced by the following reaction? A) I B) II C) III D) More than one of the above E) All of the above 3) 1
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4) The relative nucleophilicities of species do not necessarily parallel the relative basicities of the same species because: A) not all nucleophiles are bases, and vice versa. B) experimental measurements of sufficient accuracy are not available to make the comparisons. C) nucleophilicity is a thermodynamic matter; basicity is a matter of kinetics. D) basicity is a thermodynamic matter; nucleophilicity is a matter of kinetics. E) Actually, the relative values do parallel one another. 4) 5) What is the major product for the following reaction? A) I B) II C) III D) IV E) V 5) 6) Which of the following is not a good leaving group? A) C 2 H 5 O B) Cl C) I D) CH 3 CO 2 E) All of these are good leaving groups 6) 7) Which of the following would be most reactive in an S N 2 reaction? A) B) C) D) E) 7) 2
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When 1,4-diiodo-2,2-dimethylbutane (0.10 mol) is treated with 0.10 mol of NaCN in dimethyl sulfoxide at 30 ° C, the product formed is: A) B) C) both A) and B). D) E) 8) 9) What is the major product of the following reaction? A) I B) II C) III D) IV E) V 9) 10) Carbocations are frequent intermediates in acidic reactions of alkenes, alcohols, etc. What do carbocations usually do? They may: A) rearrange to a more stable carbocation. B)
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This note was uploaded on 01/22/2011 for the course CHM 2120 taught by Professor Dr.flynn during the Winter '10 term at University of Ottawa.

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Exam1 - CHM2120A Organic Chemistry II Exam 1 Name_ Version...

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