Sodium tetracarbonylcobaltate
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3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.225.207 |
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| Properties | |
| C4CoNaO4 | |
| Molar mass | 193.963 g·mol−1 |
| Appearance | white solid |
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| 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).
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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