| # | Species | Formula |
| 3316 | FeH(+) (Geo) | HFe | |
| 3317 | FeH (Geo) | HFe | |
| 3318 | Fe-CH3 | CH3Fe | |
| 3319 | Fe(III)Cp2(+) (FERRIC) (Geo) | C10H10Fe | |
| 3320 | Fe(III)Cp2(+) (FERRIC) | C10H10Fe | |
| 3321 | Fe(C5H5)2 D5d | C10H10Fe | |
| 3322 | Fe(C5H5)2 D5d (Geo) | C10H10Fe | |
| 3323 | Toluene-(2,2'-bipyridine)-iron(0) (Geo) | C17H16N2Fe | |
| 3324 | Fe(II)(NH3)6 | H18N6Fe | |
| 3325 | Fe(II)(NH3)6 (Geo) | H18N6Fe | |
| 3326 | Fe(III)(CN)6(3-) (JIHPAR) (Geo) | C6N6Fe | |
| 3327 | Fe(III)(CN)6(3-) | C6N6Fe | |
| 3328 | [Fe(II)(CN)6](4-) 1T1(g) | C6N6Fe | |
| 3329 | [Fe(II)(CN)6](4-) 1T2(g) | C6N6Fe | |
| 3330 | [Fe(II)(CN)6](4-) | C6N6Fe | |
| 3331 | [Fe(II)(CN)6](4-) (Geo) | C6N6Fe | |
| 3332 | Fe(II)(en)3 | C6H24N6Fe | |
| 3333 | Fe(II)(en)3 (Geo) | C6H24N6Fe | |
| 3334 | cis-Dicyanotetra(methylisocyanide) iron(ii) (CNMCFE) (Geo) | C10H12N6Fe | |
| 3335 | Ferrous tris(ortho phenantholine) | C36H24N6Fe | |
| 3336 | Ferrous tris(ortho phenantholine) (Geo) | C36H24N6Fe | |