IV.A.5.

Compare Barriers to Internal Rotation

Which torsion in CH₃COCH₂CH₃? Please choose which four atoms describe the torsional coordinate.

choose	Atom1	Atom2	Atom3	Atom4	Type of Rotor
torsion 1	1	2	3	4	CH2CH3
torsion 2	9	4	3	2	CH3
torsion 3	6	1	2	3	CH3