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Names | |||
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Preferred IUPAC name
Diboron tetrafluoride
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Systematic IUPAC name
Tetrafluorodiborane
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Identifiers | |||
3D model (JSmol)
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ChemSpider | |||
PubChem CID
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Properties | |||
B2F4 | |||
Molar mass | 97.616 g/mol | ||
Appearance | Colorless gas | ||
Density | 4.3 kg/m3 (gas) | ||
Melting point | −56 °C (−69 °F; 217 K) | ||
Boiling point | −34 °C (−29 °F; 239 K) | ||
Thermochemistry | |||
79.1 J/mol K | |||
Std molar
entropy (S |
317.3 J/mol K | ||
Std enthalpy of
formation (ΔfH |
-1440.1 kJ/mol | ||
Gibbs free energy (ΔfG˚)
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-1410.4 kJ/mol | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references | |||
Diboron tetrafluoride is a colorless gas. It can be formed by reacting boron monofluoride with boron trifluoride at low temperatures, taking care not to form higher polymers.