68
Chapter 3 walk
CH3
H
H
H
CH3
CH3
CH3
3.8 kJ/mol
CH3
6.0 kJ/mol
H
H3C
H CH3
HCH3
H
CH3
H
3.8 kJ/mol
6.0 kJ/mol
6.0 kJ/mol
at 60° energy = 3.8 kJ/mol at 120°: energy = 18.0 kJ/mol at 180°: energy = 3.8 kJ/mol
CH₂
CH3
11.0 kJ/mol
CH3
3.8 kJ/mol
H
CH3
3.8 kJ/mol
HCH3
H
CH3
H
4.0 kJ/mol
6.0 kJ/mol
at 300°: energy = 7.6 kJ/mol
at 240°: energy = 21.0 kJ/mol
Use the lowest energy conformation as the energy minimum. The highest energy
conformation is 17.2 kJ/mol higher in energy than the lowest energy conformation.
for Li (02
Energy
(kJ/mol)
21
MY
13.8
18
13.8
7.6
21
60°
120°
180°
Angle of Rotation
240°
300°
360°
