Exam2-2007 key

Exam2-2007 key - CHEMISTRY 2261 EXAM 2 October 17, 2007...

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CHEMISTRY 2261 October 17, 2007 EXAM 2 NAME (PRINT)____________________________________________ 123456789 1 0 1 1 TOTAL LIST number 1. (6 pts, 3 pts ea) For each of the following pairs, indicate in the box how the molecules are related. Indicate only one answer for each of the pairs of structures. ( ID ) Identical (same molecule) ( EN ) Enantiomers ( DI ) Diastereomers ( SI ) Structural Isomers ( NR ) Not Related H H Me H H H H Me H Me H H Me H H H Me H Me H EN ID 2. (6 pts) Indicate (circle) high priority groups and assign ( Z ) or ( E ) configuration to the following compounds. You will not get credit for your ( Z ) or ( E ) choice unless you assign correct priorities. example (a) (b) Cl F ( E ) CN H OH ( E )( Z ) 3. (3 pts) At room temperature (25 °C), a reversible reaction equilibrates A and B to a 1000:1 ratio. What is the free energy difference between A and B? (Potentially useful numbers: R = 1.987 cal mol -1 ° K -1 , RTln10 = 1.36 kcal mol -1 at 25 °C). AB [ B ] [ A ] = 1 1000 at equilibrium (25 °C) Δ G° = 4.08 kcal mol -1 Answer Key No points unless circled groups are on different carbons
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2 4. (8 pts, 2 pts ea) Indicate reagents and conditions for the following transformations.
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Exam2-2007 key - CHEMISTRY 2261 EXAM 2 October 17, 2007...

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