For the the structure shown below, Part A) Draw the Newman projections and 3-D sawhorse structures corresponding to the lowest and highest energy conformations for rotation around the C2-C3 bond. Draw the Newman projections looking FROM THE C2 CARBON TO THE C3 CARBON (i.e. with the C2 carbon in the "front"). Part B) Determine the energy difference between the lowest and highest conformations, and be sure to clearly show each energy contribution that you are including in your calculation. u Lowest Energy Conformation 3-D sawhorse Newman ECLIPSING Interactions AB Energy kcal/mol H/H 1.0 H/Me 1.4 H/Et 1.5 H/i-Pr 1.6 H/t-Bu 3.0 Me / Me 2.6 Me / Et 2.7 Me / i-Pr 3.0 GAUCHE A Interactions Me / Me Me / Et Me / i-Pr Me/t-Bu Et / Et Et/i-Pr Et/t-Bu i-Pr/i-Pr 3-D sawhorse Energy kcal/mol Newman 0.9 0.95 1.1 2.7 1.1 1.6 Highest Energy Conformation 3.0 2.0
For the the structure shown below, Part A) Draw the Newman projections and 3-D sawhorse structures corresponding to the lowest and highest energy conformations for rotation around the C2-C3 bond. Draw the Newman projections looking FROM THE C2 CARBON TO THE C3 CARBON (i.e. with the C2 carbon in the "front"). Part B) Determine the energy difference between the lowest and highest conformations, and be sure to clearly show each energy contribution that you are including in your calculation. u Lowest Energy Conformation 3-D sawhorse Newman ECLIPSING Interactions AB Energy kcal/mol H/H 1.0 H/Me 1.4 H/Et 1.5 H/i-Pr 1.6 H/t-Bu 3.0 Me / Me 2.6 Me / Et 2.7 Me / i-Pr 3.0 GAUCHE A Interactions Me / Me Me / Et Me / i-Pr Me/t-Bu Et / Et Et/i-Pr Et/t-Bu i-Pr/i-Pr 3-D sawhorse Energy kcal/mol Newman 0.9 0.95 1.1 2.7 1.1 1.6 Highest Energy Conformation 3.0 2.0
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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