Iron - 26Fe: compounds information
This section lists some binary compounds with halogens (known as halides), oxygen (known as oxides), hydrogen (known as hydrides), and some other compounds of iron. For each compound, a formal oxidation number for iron is given, but the usefulness of this number is limited for p-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 iron (where known), the most common oxidation numbers of iron are: 3, and 2.
Hydrides
The term hydride is used to indicate compounds of the type MxHy and not necessarily to indicate that any compounds listed behave as hydrides chemically.
- none listed
Fluorides
- Iron difluoride: FeF2
- Iron trifluoride: FeF3
Chlorides
- Iron dichloride: FeCl2
- Iron trichloride: FeCl3
Bromides
- Iron dibromide: FeBr2
- Iron tribromide: FeBr3
Iodides
- Iron diiodide: FeI2
- Iron triiodide: FeI3
Oxides
- Iron oxide: FeO
- Diron trioxide: Fe2O3
- Triiron tetraoxide: Fe3O4
Sulfides
- Iron sulphide: FeS
- Iron persulphide: FeS2
Selenides
- Iron selenide: FeSe
Tellurides
- Iron telluride: FeTe
Nitrides
- Diiron nitride: Fe2N
Carbonyls
- Iron pentacarbonyl: Fe(CO)5
- Diiron nonacarbonyl: Fe2(CO)9
- Triiron dodecacarbonyl: Fe3(CO)12
Complexes
- Iron dichloride dihydrate: FeCl2.2H2O
- Iron trifluoride trihydrate: FeF3.3H2O
- Iron dibromide hexahydrate: FeBr2.6H2O
- Iron dichloride tetrahydrate: FeCl2.4H2O
- Iron nitrate hexahydrate: Fe(NO3)2.6H2O
- Iron iodide tetrahydrate: FeI2.4H2O
- Iron trichloride hexahydrate: FeCl3.6H2O
- Iron difluoride tetrahydrate: FeF2(OH2)4
- Iron sulphate heptahydrate: FeSO4.7H2O
- Iron trinitrate nonahydrate: Fe(NO3)3.9H2O
- Diiron trisulphate nonahydrate: Fe2(SO4)3.9H2O
- Triiron diphosphate octahydrate: Fe3(PO4)2.8H2O