Iron pentacarbonyl
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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.[2]
Quick Facts Names, Identifiers ...
Names | |
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IUPAC name
Pentacarbonyliron(0) | |
Other names
Pentacarbonyl iron Iron carbonyl | |
Identifiers | |
3D model (JSmol) |
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ChEBI | |
ChemSpider |
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ECHA InfoCard | 100.033.323 |
PubChem CID |
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RTECS number |
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UNII | |
UN number | 1994 |
CompTox Dashboard (EPA) |
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Properties | |
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) |
Insoluble | |
Solubility | Soluble in organic solvents slightly soluble in alcohol insoluble in ammonia |
Vapor pressure | 40 mmHg (30.6 °C)[1] |
Refractive index (nD) |
1.5196 (20 °C) |
Structure | |
D3h | |
trigonal bipyramidal | |
trigonal bipyramidal | |
0 D | |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards |
Very toxic, highly flammable |
GHS labelling: | |
NFPA 704 (fire diamond) | |
Flash point | −15 °C (5 °F; 258 K) |
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[1] |
REL (Recommended) |
TWA 0.1 ppm (0.23 mg/m3) ST 0.2 ppm (0.45 mg/m3)[1] |
IDLH (Immediate danger) |
0.4 ppm[1] |
Safety data sheet (SDS) | ICSC 0168 |
Related compounds | |
Related compounds |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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