This section lists some binary compounds with halogens (known as halides), oxygen (known as oxides), hydrogen (known as hydrides), and some other compounds of thallium. For each compound, a formal oxidation number for thallium is given, but the usefulness of this number is limited forp-block elements in particular. Based upon that oxidation number, an electronic configuration is also given but note that for more exotic compounds you should view this as a guide only.

In compounds of thallium (where known), the most common oxidation numbers of thallium are:3, and 1.

Hydrides

The term hydride is used to indicate compounds of the type M_xH_y and not necessarily to indicate that any compounds listed behave as hydrides chemically.

• none listed

Fluorides

• Thallium fluoride: TlF
• Thallium trifluoride: TlF₃

Chlorides

• Thallium chloride: TlCl
• Thallium dichloride: TlCl₂
• Thallium trichloride: TlCl₃

Bromides

• Dithallium tetrabromide: Tl₂Br₄

Iodides

• Thallium iodide: TlI
• Thallium triiodide: TlI₃

Oxides

• Dithallium oxide: Tl₂O
• Dithallium trioxide: Tl₂O₃

Sulfides

• Dithallium sulphide: Tl₂S

Selenides

• Dithallium selenide: Tl₂Se

Tellurides

• none listed

Nitrides

• none listed

Carbonyls

• none listed

Complexes

• none listed