Cobalt tetracarbonyl hydride

compra seroflo Cobalt tetracarbonyl hydride

acheter rocaltrol Names

acquistare ashwagandha Other names
cobalt hydrocarbonyl
Hydrocobalt tetracarbonyl

compra pravachol Identifiers

comprar flonase sin receta CAS Number

acheter tegretol 16842-03-8 Y=

acquistare paroxetine PubChem

comprar hca fit garcinia cambogia sin receta Properties

acquistare mevacor Chemical formula

acheter orligal C4HCoO4

compra amantadine Molar mass
171.98 g/mol

Light yellow liquid


Melting point
−33 °C (−27 °F; 240 K)

Boiling point
47 °C (117 °F; 320 K)

Solubility in water

0.05% (20°C)[1]

soluble in hexane, toluene, ethanol

Vapor pressure
>1 atm (20°C)[1]

Acidity (pKa)


Main hazards
flammable, decomposes in air[1]

US health exposure limits (NIOSH):

PEL (Permissible)


REL (Recommended)

TWA 0.1 mg/m3[1]

IDLH (Immediate danger)


Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

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Infobox references

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.[2] 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 reactions.


1 Structure and properties
2 Preparation
3 Applications
4 References

Structure and properties[edit]

HCo(CO)4 adopts trigonal bipyrimidal structure with the equatorial CO ligands slightly bent out of the equatorial plane. The hydride ligand occupies one of the axial positions, thus the symmetry of the molecule is C3v.[3] The Co–CO and Co–H bond distances were determined by gas-phase electron diffraction to be 1.764 and 1.556 Å, respectively.[4] Assuming the presence of a formal hydride ion, the oxidation state of cobalt in this compound is +1.
Unlike many some other transition-metal hydrides complexes, HCo(CO)4 is highly acidic, with a pKa of 8.5.[5] It readily undergoes substitution by tertiary phosphines and other Lewis-bases. For example, triphenylphosphine gives HCo(CO)3PPh3 and HCo(CO)2(PPh3)2. These derivatives are more stabl