
It is followed by trans $-1,\,3-$ Dimethylcyclohexane where one $-C H_{3}$ group is equatorial and other is axial (Refer to Image $II$)
Diaxial cis $-1,\,3-$ Dimethylcyclohexane is less stable due to large amount of steric strain due to the interaction of axial - $\mathrm{CH}_{3}$ groups. (Refer to Image $III$ )
$(I) > (II) \approx (III) > (IV)$





$(CH_3)_3 \, \overline C , \overline C Cl_3 ,(CH_3 )_2 \overline C H ,C_6 H_5 \overline C H_2$