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
Organic Chemistry: A Guided Inquiry
2nd Edition
ISBN:9780618974122
Author:Andrei Straumanis
Publisher:Andrei Straumanis
Chapter6: Alkanes & Alkenes
Section: Chapter Questions
Problem 10CTQ: Consider the Newman projection below. a. Draw a full Lewis structure of this molecule with...
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