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| Names | |
|---|---|
| Other names
cobalt hydrocarbonyl
tetracarbonylhydridocobalt Tetracarbonylhydrocobalt Hydrocobalt tetracarbonyl | |
| Identifiers | |
3D model (JSmol)
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| ECHA InfoCard | 100.290.757 |
PubChem CID
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| UNII | |
CompTox Dashboard (EPA)
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| Properties | |
| C4HCoO4 | |
| Molar mass | 171.98 g/mol |
| Appearance | Light yellow liquid |
| Odor | offensive[1] |
| Melting point | −33 °C (−27 °F; 240 K) |
| Boiling point | 47 °C (117 °F; 320 K) |
| 0.05% (20°C)[1] | |
| Solubility | soluble in hexane, toluene, ethanol |
| Vapor pressure | >1 atm (20°C)[1] |
| Acidity (pKa) | 1 (in water)[2] 8.3 (in acetonitrile)[3] |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards
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flammable, decomposes in air[1] |
| NIOSH (US health exposure limits): | |
PEL (Permissible)
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none[1] |
REL (Recommended)
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TWA 0.1 mg/m3[1] |
IDLH (Immediate danger)
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N.D.[1] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Cobalt tetracarbonyl hydride is an organometallic compound with the formula HCo(CO)4. It is a volatile, yellow liquid that forms a colorless vapor and has an intolerable odor.[4] The compound readily decomposes upon melt and in absentia of high CO partial pressures forms Co2(CO)8. Despite operational challenges associated with its handling, the compound has received considerable attention for its ability to function as a catalyst in hydroformylation. In this respect, HCo(CO)4 and related derivatives have received significant academic interest for their ability to mediate a variety of carbonylation (introduction of CO into inorganic compounds) reactions.
- ^ a b c d e f g NIOSH Pocket Guide to Chemical Hazards. "#0148". National Institute for Occupational Safety and Health (NIOSH).
- ^ Holleman, Arnold F.; Wiberg, Egon; Wiberg, Nils (1995). Lehrbuch der anorganischen Chemie (in German). Berlin: de Gruyter. ISBN 978-3-11-012641-9. OCLC 237142268.
- ^ Moore, Eric J.; Sullivan, Jeffrey M.; Norton, Jack R. (1986). "Kinetic and thermodynamic acidity of hydrido transition-metal complexes. 3. Thermodynamic acidity of common mononuclear carbonyl hydrides". Journal of the American Chemical Society. 108 (9). American Chemical Society (ACS): 2257–2263. doi:10.1021/ja00269a022. ISSN 0002-7863. PMID 22175569.
- ^ Kerr, W. J. (2001). "Sodium Tetracarbonylcobaltate". Encyclopedia of Reagents for Organic Synthesis. doi:10.1002/047084289X.rs105. ISBN 0471936235.