Iron tetracarbonyl diiodide

Iron tetracarbonyl diiodide is the inorganic compound with the formula FeI2(CO)4. The molecule features four carbonyl ligands and two iodides. It is a low-spin complex of ferrous iron. As confirmed by X-ray crystallography, the compound has cis stereochemistry.[1] It is a black solid that is soluble in dichloromethane and related organic solvents.

Iron tetracarbonyl diiodide
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/4CO.Fe.2HI/c4*1-2;;;/h;;;;;2*1H/q;;;;+2;;/p-2
    Key: BNIJVXICMSDYLX-UHFFFAOYSA-L
  • [C-]#[O+].[C-]#[O+].[C-]#[O+].[C-]#[O+].[Fe](I)I
Properties
C4FeI2O4
Molar mass 421.694 g·mol−1
Appearance black solid
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Preparation and reactions

It is prepared by the reaction of molecular iodine with iron pentacarbonyl, following a procedure first reported by Hieber and Wirschung in 1940:[2]

Fe(CO)5 + I2 → FeI2(CO)4 + CO

Iron tetracarbonyl diiodide reacts with a variety of Lewis bases with displacement of one or two CO ligands.[3]

References
  1. Yu. V. Torubayev, A. A. Pasynskii, P. Mathur (2008). Koordinatsionnaya Khimiya. 34: 812–816. {{cite journal}}: Missing or empty |title= (help)CS1 maint: multiple names: authors list (link)
  2. Hieber, W.; Wirsching, A. (1940). "Über Metallcarbonyle. XXXII. Über Eisencarbonylhalogenide". Z. Anorg. Allg. Chem. 245: 35-58. doi:10.1002/zaac.19402450108.
  3. Li, Bin; Liu, Tianbiao; Popescu, Codrina V.; Bilko, Andrey; Darensbourg, Marcetta Y. (2009). "Synthesis and Mössbauer Characterization of Octahedral Iron(II) Carbonyl Complexes FeI2(CO)3L and FeI2(CO)2L2: Developing Models of the [Fe]-H2ase Active Site". Inorg. Chem. 48 (23): 11283–11289. doi:10.1021/ic9017882. PMID 19860458.
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