Iron pentacarbonyl

Iron pentacarbonyl
Names
	IUPAC name Pentacarbonyliron(0)
	Other names Pentacarbonyl iron; Iron carbonyl
Identifiers
CAS Number	13463-40-6 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:30251 ;
ChemSpider	24254 ;
ECHA InfoCard	100.033.323
PubChem CID	26040;
RTECS number	NO4900000;
UNII	6WQ62TAQ6Z ;
UN number	1994
CompTox Dashboard (EPA)	DTXSID3027746 ;
	InChI InChI=1S/5CO.Fe/c51-2; Key: FYOFOKCECDGJBF-UHFFFAOYSA-N ; InChI=1/5CO.Fe/c51-2; Key: FYOFOKCECDGJBF-UHFFFAOYAX;
	SMILES O=C=[Fe](=C=O)(=C=O)(=C=O)=C=O;
Properties
Chemical formula	Fe(CO)5
Molar mass	195.90 g/mol
Appearance	straw-yellow to brilliant orange liquid
Odor	musty
Density	1.453 g/cm3
Melting point	−21.0 °C (−5.8 °F; 252.2 K)
Boiling point	103 °C (217 °F; 376 K)
Solubility in water	Insoluble
Solubility	Soluble in organic solvents ; slightly soluble in alcohol ; insoluble in ammonia
Vapor pressure	40 mmHg (30.6 °C)
Refractive index (nD)	1.5196 (20 °C)
Structure
Point group	D3h
Coordination geometry	trigonal bipyramidal
Molecular shape	trigonal bipyramidal
Dipole moment	0 D
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Very toxic, highly flammable
	GHS labelling:
Pictograms
NFPA 704 (fire diamond)	4 3 1
Flash point	−15 °C (5 °F; 258 K)
Autoignition; temperature	49 °C (120 °F; 322 K)
Explosive limits	3.7–12.5%
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	25 mg/kg (rat, oral)
	NIOSH (US health exposure limits):
PEL (Permissible)	none
REL (Recommended)	TWA 0.1 ppm (0.23 mg/m3) ST 0.2 ppm (0.45 mg/m3)
IDLH (Immediate danger)	0.4 ppm
Safety data sheet (SDS)	ICSC 0168
Related compounds
Related compounds	Chromium hexacarbonyl; Molybdenum hexacarbonyl; Tungsten hexacarbonyl; Seaborgium hexacarbonyl; Vanadium hexacarbonyl; Dimanganese decacarbonyl; Dirhenium decacarbonyl; Diiron nonacarbonyl; Triruthenium dodecacarbonyl; Triosmium dodecacarbonyl; Dicobalt octacarbonyl; Tetrarhodium dodecacarbonyl; Tetrairidium dodecacarbonyl; Nickel tetracarbonyl;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Iron pentacarbonyl, also known as iron carbonyl, is the compound with formula Fe(CO)₅. Under standard conditions Fe(CO)₅ is a free-flowing, straw-colored liquid with a pungent odour. Older samples appear darker. This compound is a common precursor to diverse iron compounds, including many that are useful in small scale organic synthesis.

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