Chlorine and oxygen can bond in many different ways:
- chlorine monoxide (ClO), chlorine(II) oxide
- chlorine dioxide (ClO2), chlorine(IV) oxide
- chlorine trioxide (ClO3), chlorine(VI) oxide
- dichlorine monoxide (Cl2O), chlorine(I) oxide
- dichlorine dioxide (Cl2O2), chlorine(I) peroxide
- dichlorine trioxide (Cl2O3), chlorine(I,V) oxide
- dichlorine tetroxide, also known as chlorine perchlorate, (ClOClO3), chlorine(I,VII) oxide
- dichlorine hexoxide (Cl2O6), chlorine(V,VII) oxide
- dichlorine heptoxide (Cl2O7), chlorine(VII) oxide
- chlorine tetroxide, the peroxide ((OClO3)2), chlorine(VII) oxide peroxide
In addition, a number of ions are chlorine oxides:
- chloryl (ClO2+)
- perchloryl (ClO3+)
- hypochlorite (ClO-)
- chlorite (ClO2-)
- chlorate (ClO3-)
- perchlorate (ClO4-)