CH3Cl2\mathrm{CH}_{3} \mathrm{Cl}_{2}CH3Cl2
C2H5Cl\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{Cl}C2H5Cl
CH3I\mathrm{CH}_{3} \mathrm{I}CH3I
CHI3\mathrm{CHI}_{3}CHI3