What is the barrier to rotation around the C2-C3 bond?

Organic Chemistry
8th Edition
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Chapter2: Alkanes And Cycloalkanes
Section: Chapter Questions
Problem 2.45P: Gibbs free energy differences between axial-substituted and equatorial-substituted chair...
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Give answer only  (f)

 

8.
a)
b)
f)
Draw 2-methylpentane.
3
5
CH3
CH3 CH CHỈ CHÍ CH3
1
2
3
4 S
-
Draw Newman projections for the six energy maxima and minima for rotation arour
the C2-C3 bond.
Calculate the energy at each conformation. (Assume the same energies for -Et as
you would for -Me.)
Use these values to make a graph of potential energy versus dihedral angle.
Label the most stable conformation.
Label the least stable conformation?
What is the barrier to rotation around the C2-C3 bond?
Transcribed Image Text:8. a) b) f) Draw 2-methylpentane. 3 5 CH3 CH3 CH CHỈ CHÍ CH3 1 2 3 4 S - Draw Newman projections for the six energy maxima and minima for rotation arour the C2-C3 bond. Calculate the energy at each conformation. (Assume the same energies for -Et as you would for -Me.) Use these values to make a graph of potential energy versus dihedral angle. Label the most stable conformation. Label the least stable conformation? What is the barrier to rotation around the C2-C3 bond?
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