 | |
| Names | |
|---|---|
| IUPAC names Germanium tetrafluoride Tetrafluorogermane Tetrafluoridogermanium | |
| Other names Germanium(IV) fluoride Germanium fluoride | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider |
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| ECHA InfoCard | 100.029.101 |
| EC Number |
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| UNII | |
| |
| |
| Properties[2] | |
| GeF4 | |
| Molar mass | 148.634 g/mol |
| Appearance | colourless gas |
| Density | 6.074 g/L (gas), 2.46 g/mL (liquid)[1] |
| Melting point | −15 °C (5 °F; 258 K) at 4 bar |
| Boiling point | −36.5 °C (−33.7 °F; 236.7 K) sublimates |
| −50.0·10−6 cm3/mol | |
| Structure | |
| tetrahedral | |
| Thermochemistry | |
Std enthalpy of formation(ΔfH⦵298) | −8.008 kJ/g |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards | Reacts with water to formHF, corrosive |
| GHS labelling: | |
   | |
| Danger | |
| H314,H331,H372 | |
| P260,P261,P264,P270,P271,P280,P301+P330+P331,P303+P361+P353,P304+P340,P305+P351+P338,P310,P311,P314,P321,P363,P403+P233,P405,P410+P403,P501 | |
| NFPA 704 (fire diamond) | |
| Flash point | Non-flammable |
| Related compounds | |
Otheranions | Germanium tetrachloride Germanium tetrabromide Germanium tetraiodide |
Othercations | Carbon tetrafluoride Silicon tetrafluoride Tin tetrafluoride Lead tetrafluoride |
Related compounds | Germanium difluoride |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Germanium tetrafluoride (GeF4) is a chemical compound ofgermanium andfluorine. It is a colorless gas.
Germanium tetrafluoride is formed by treating germanium with fluorine:
Alternativelygermanium dioxide combines withhydrofluoric acid (HF):[3]
It is also formed during the thermal decomposition of a complex salt, Ba[GeF6]:[4]
Germanium tetrafluoride is a noncombustible, strongly fuming gas with a garlic-like odor. It reacts with water to form hydrofluoric acid and germanium dioxide. Decomposition occurs above 1000 °C.[5]
Reaction of GeF4 with fluoride sources produces GeF5− anions with octahedral coordination around Ge atom due to polymerization.[6] The structural characterization of a discrete trigonal bipyramidal GeF5− anion was achieved by a "naked" fluoride reagent 1,3-bis(2,6-diisopropylphenyl)imidazolium fluoride.[7]
In combination with disilane, germanium tetrafluoride is used for in the synthesis ofSiGe.[1]
