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Names | |||
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Other names
Pentafluorochlorosulfanyl
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Identifiers | |||
3D model (
JSmol)
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ChemSpider | |||
ECHA InfoCard | 100.034.014 | ||
PubChem
CID
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UNII | |||
CompTox Dashboard (
EPA)
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Properties | |||
SF5Cl | |||
Molar mass | 162.510 g/mol | ||
Appearance | Colorless gas | ||
Density | 6.642 g/dm3 | ||
Melting point | −64 °C (−83 °F; 209 K) | ||
Boiling point | −19 °C (−2 °F; 254 K) | ||
Hazards | |||
Occupational safety and health (OHS/OSH): | |||
Main hazards
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Toxic | ||
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
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Sulfur chloride pentafluoride is an
inorganic compound with the formula SF5Cl. It exists as a colorless gas at room temperature and is highly toxic, like most inorganic compounds containing the pentafluorosulfide (–SF5) functional group.
[1] The compound adopts an octahedral geometry with C
4v symmetry. Sulfur chloride pentafluoride is the only commercially available reagent for adding the –SF5 group to organic compounds.
[2]
[3]
SF5Cl is highly reactive and toxic. In contrast, sulfur hexafluoride (SF6) is inert and nontoxic despite having a closely related chemical formula. This difference highlights the lability of the S–Cl bond in SF5Cl.
Under free-radical conditions, SF5Cl adds across double bonds. The following reaction occurs with propene:
The addition reaction is catalyzed by (CH3CH2)3B at around −30 °C. SF5Br is used similarly. [2]
SF5Cl is also a precursor to O(SF5)2 and F2NSF5 (from tetrafluorohydrazine).
Sulfur chloropentafluoride can be synthesized by several routes, starting from two lower sulfur fluorides, sulfur tetrafluoride and disulfur decafluoride: [1]
The corresponding SF
5Br is prepared similarly from in-situ generated
bromine monofluoride.
[4]