Sodium tetracarbonylcobaltate

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Sodium tetracarbonylcobaltate
NaCo(CO)4.svg
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.225.207 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 696-062-7
PubChem CID
  • InChI=1S/4CO.Co.Na/c4*1-2;;/q;;;;-1;+1
    Key: REACDJLEGGOITP-UHFFFAOYSA-N
  • [Co-](C#O)(C#O)(C#O)C#O.[Na+]
Properties
C4CoNaO4
Molar mass 193.963 g·mol−1
Appearancewhite solid
Hazards
GHS labelling:
GHS-pictogram-skull.svg GHS-pictogram-silhouette.svg GHS-pictogram-pollu.svg
Danger
H302, H317, H330, H351, H412
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Sodium tetracarbonylcobaltate is the organocobalt compound with the formula NaCo(CO)4. It is a common derivative of the tetracarbonylcobaltate anion, [Co(CO)4]-, although several other alkali metal salts are known. The tetracarbonylcobaltate anion is the conjugate base of cobalt tetracarbonyl hydride, HCo(CO)4. [1] According to X-ray crystallography, the Co(CO)4- center is nearly tetrahedral (isoelectronic with Ni(CO)4). [2]

Conventionally, this compound is prepared by reduction of dicobalt octacarbonyl with sodium amalgam: [1]

Co2(CO)8 + 2 Na → 2 NaCo(CO)4

It reacts with mercuric cyanide to give a HgCo2 derivative: [3]

Hg(CN)2 + 2 NaCo(CO)4 → Hg[Co(CO)4]2 + 2 NaCN

References

  1. 1 2 Kerr, William J. (2001). "Sodium Tetracarbonylcobaltate". Encyclopedia of Reagents for Organic Synthesis. doi:10.1002/047084289X.rs105. ISBN   0-471-93623-5.
  2. ↑ Klüfers, Peter (1984). "Die Kristallstrukturen von LiCo(CO)4und NaCo(CO)4". Zeitschrift für Kristallographie. 167 (3–4): 275–286. Bibcode:1984ZK....167..275K. doi:10.1524/zkri.1984.167.3-4.275.
  3. ↑ Sheldrick, G. M.; Simpson, R. N. F. (1968). "The Crystal and Molecular Structure of Bis(tetracarbonylcobalt)mercury, Hg[Co(CO)4]2". Journal of the Chemical Society A: Inorganic, Physical, Theoretical: 1005. doi:10.1039/J19680001005.
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