CCl4\mathrm{CCl}_{4}CCl4
CH2Cl2\mathrm{CH}_{2} \mathrm{Cl}_{2}CH2Cl2
C2Cl2\mathrm{C}_{2} \mathrm{Cl}_{2}C2Cl2
C2Cl4\mathrm{C}_{2} \mathrm{Cl}_{4}C2Cl4