A. Draw the Newman projections & 3-D sawhorse structures for both the highest & lowest energy conformations (clearly indicate which's which). B. Determine the energy difference between lowest & highest conformations. CLEARLY indicate the energy factors you include in the calculation of this energy difference. xECLIPSINGInteractionsABH/HH / MeH/EtH/i-PrEnergykcal/mol1.01.41.51.6H/ t-Bu3.0Me / Me2.6Me / Et 2.7Me / i-Pr 3.0GAUCHE AInteractionsBEnergykcal/mol0.90.951.12.71.11.6Me / MeMe / EtMe / i-PrMe / t-BuEt / EtEt/i-PrEt / t-Bu3.0i-Pr/i-Pr 2.0Part A) Draw the Newman projections and 3-D sawhorsestructures for BOTH the HIGHEST and LOWEST energyconformations (clearly indicate which is which). Your Newmanprojections should look FROM carbon 2 to carbon 3 (i.e. withthe C2 carbon in the "front").

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Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter11: Chemical Kinetics

Section: Chapter Questions

Problem 11.73PAE

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A. Draw the Newman projections & 3-D sawhorse structures for both the highest & lowest energy conformations (clearly indicate which's which).

B. Determine the energy difference between lowest & highest conformations. CLEARLY indicate the energy factors you include in the calculation of this energy difference.

x
ECLIPSING
Interactions
AB
H/H
H / Me
H/Et
H/i-Pr
Energy
kcal/mol
1.0
1.4
1.5
1.6
H/ t-Bu
3.0
Me / Me
2.6
Me / Et 2.7
Me / i-Pr 3.0
GAUCHE A
Interactions
B
Energy
kcal/mol
0.9
0.95
1.1
2.7
1.1
1.6
Me / Me
Me / Et
Me / i-Pr
Me / t-Bu
Et / Et
Et/i-Pr
Et / t-Bu
3.0
i-Pr/i-Pr 2.0
Part A) Draw the Newman projections and 3-D sawhorse
structures for BOTH the HIGHEST and LOWEST energy
conformations (clearly indicate which is which). Your Newman
projections should look FROM carbon 2 to carbon 3 (i.e. with
the C2 carbon in the "front").

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