Organic Chemistry - Sample Mid-Term 2

Organic Chemistry - Sample Mid-Term 2 - CHM 1321 Sample Mid...

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1 CHM 1321 Sample Mid Term 2 1. Name the following compounds ( 6 points ): a) b) E-5-Methylhex-2-ene Z-2,6-Dimethylocta-2,6-diene 3 3 2. Consider the following reaction. Br S ++ B r S a) Write a detailed mechanism for this transformation ( 5 points ). Br S B r S 1 1 1 1 1 S N 2 b) Draw the transition state for the rate determining step ( 9 points ). H H Br CH 3 S δ− δ− δ++ 1 1 1 1 1 1 1 1 1 c) What will be the effect on the overall rate of the reaction if the concentration of CH 3 S - is doubled? Briefly explain why using the rate expression ( 6 points ). 3 1 dP dt = k Br S rate is proportional to the concentration of CH 3 S rate will double 2 d) Draw the reaction co-ordinate diagram for this process. Label the starting materials, products and transition state(s) ( 7 points ).
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2 CH 3 S Br Br S E reaction co-ordinate 1 1 1 1 1 2 e) What will be the effect on the rate of the reaction if Cl is used in place of Br? Briefly explain ( 6 points ).
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This note was uploaded on 01/16/2011 for the course CHM 1320 taught by Professor Ogilvie during the Fall '08 term at University of Ottawa.

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Organic Chemistry - Sample Mid-Term 2 - CHM 1321 Sample Mid...

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