Zirconium(II) hydride
| Names | |
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| IUPAC name
Zirconium(II) hydride | |
Other names
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| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.028.844 |
| EC Number |
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PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| ZrH2 | |
| Molar mass | 93.240 g/mol |
| Appearance | Grey tetragonal crystals or dark gray to black metallic powder |
| Odor | Odorless |
| Density | 5.60 g/cm3 |
| Melting point | 800°C (decomposes) |
| Insoluble | |
| Solubility | Soluble in HF |
| Structure | |
| tetragonal | |
| dihedral (C2v) | |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards |
Skin irritation, eye irritation, flammable</ref> |
| GHS labelling: | |
| Danger | |
| H228, H315, H319, H335 | |
| P210, P240, P241, P261, P264, P271, P280, P302+P352, P304+P340+P312, P305+P351+P338, P332+P313, P337+P313, P362, P370+P378, P403+P233, P405, P501 | |
| NFPA 704 (fire diamond) | |
| 270 °C | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
Zirconium(II) hydride is a molecular chemical compound with the chemical formula ZrH2. It is a grey crystalline solid or dark gray to black powder. It has been prepared by laser ablation and isolated at low temperature.
Zirconium(II) hydride has repeatedly been the subject of Dirac–Hartree–Fock relativistic calculation studies, which investigate the stabilities, geometries, and relative energies of hydrides of the formula MH4, MH3, MH2, or MH.
Zirconium(II) hydride has a dihedral (C2v) structure. In zirconium(II) hydride, the formal oxidation states of zirconium and hydrogen are +2 and −1, respectively, because the electronegativity of zirconium is lower than that of hydrogen. The stability of metal hydrides with the formula MH2 (M = Ti, Zr, Hf) decreases from Ti to Hf.