HH

CH3

CH3

diaxial (4 gauche interactions)

CH3

H

H

CH3

diequatorial (1 gauche interaction) FAVORED conformation

trans-1,2-dimethylcyclohexane

CH3

H

diequatorial (0 gauche interactions)FAVORED conformation

H

CH3

2 "regular" gauche interactions +CH3 - CH3 interaction

cis-1,3-dimethylcyclohexane

H3C

H

CH3

H

CH3

H

2 gauche interactions

H

CH3

2 gauche interactions

trans-1,3-dimethylcyclohexane

H

CH3

H

H3C

EQUAL stability

HH

CH3

cis-1,4-dimethylcyclohexane

CH3

H

diequatorial (0 gauche interactions)FAVORED conformation

H

CH3

4 gauche interactions

trans-1,4-dimethylcyclohexane

CH3

CH3

H3C

H

H

2 gauche interactions 2 gauche interactions

EQUAL stability

H3C

H

H

CH3