Cobalt(II) hydride
| Names | |
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| Other names
Cobalt dihydride, cobaltous hydride
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| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
PubChem CID
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| Properties | |
| CoH2 | |
| Molar mass | 60.949 g·mol−1 |
| Appearance | dark grey crystals |
| Density | 0.533 g/cm3 |
| reacts | |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards
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highly reacts |
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(II) hydride is an inorganic compound with a chemical formula CoH2. It has dark grey crystals. It oxidizes slowly in air and reacts with water.[1][2]
Two forms of cobalt(II) hydride exist under high pressure. From 4 to 45 GPa there is a face-centred cubic form with formula CoH. This can be decompressed at low temperatures to form a metastable compound at atmospheric pressure. Over 45 GPa a cobalt(II) hydride CoH2 also crystallises in a face-centred cubic form.[3]
Preparation
Cobalt(II) hydride can prepared by reacting phenylmagnesium bromide and cobalt(II) chloride in hydrogen gas:
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