CBr2ClF\mathrm{CBr}_{2} \mathrm{ClF}CBr2ClF
CH3Cl\mathrm{CH}_{3} \mathrm{Cl}CH3Cl
CH3Br\mathrm{CH}_{3} \mathrm{Br}CH3Br
CH3CH2Cl\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{Cl}CH3CH2Cl