Lab8_PostLab

Lab8_PostLab - Plot amount of tert-butyl bromide on the...

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Chem 2545 Fall 2007 Post Lab 8 Report I. Title of lab II. State the objective(s) of the lab III. Give a summary of your observations IV. Postlab Questions/Discussion of Results 1. (a) According to Table 8-1, which is the better leaving group, Cl - or Br - ? (b) Are the results consistent with relative basicities of Cl - and Br - ion? Explain. (c) Which anion, Cl - or Br - , is more basic? Explain. 2. (a) According to Table 8-2, which compound, tert -butyl bromide or 2-bromopropane, reacted faster? (b) Explain. 3. (a) What solvent system in Table 8-3 is the most polar? (b) As you increased the solvent polarity, did the rate of the reaction increase or decrease? Explain. 4. Were the results in Table 8-4 consistent with the effect of solvent concentration on the reaction rate of an S N 1 reaction? Explain. (b) Use the data from Table 8-4 to make a bar graph.
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Unformatted text preview: Plot amount of tert-butyl bromide on the x-axis and average time on the y-axis. 5. A student ran two separate substitution reactions, Reaction A and Reaction B, in lab that utilized an alkyl halide and a nucleophile. However, he did not know if the reactions proceeded through an S N 1 or S N 2 mechanism. To determine the mechanism for both reactions, the student decreased the concentration of the Chem 2545 Fall 2007 nucleophile in Reactions A and B. The rate of reaction for Reaction A decreased. The rate of reaction for Reaction B remained the same. a) Which reaction is the S N 1 reaction? (b) Which reaction is the S N 2 reaction? (c) Explain both of your choices. 6. Unlike the S N 2 reaction, a nucleophile is less impeded by steric hindrance in a S N 1 reaction. Explain....
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This note was uploaded on 03/31/2008 for the course ? ? taught by Professor ? during the Fall '05 term at Indian Hills CC.

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Lab8_PostLab - Plot amount of tert-butyl bromide on the...

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