Sulfur tetrachloride
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IUPAC name
Sulfur(IV) chloride
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3D model (Jmol)
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| ECHA InfoCard | 100.149.178 |
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| Properties | |
| SCl4 | |
| Molar mass | 173.87 |
| Appearance | White powder |
| Melting point | −31 °C (−24 °F; 242 K) |
| Boiling point | −20 °C (−4 °F; 253 K) (decomposes) |
| soluble in water | |
| Hazards | |
| R-phrases (outdated) | R14, R34, R50 |
| S-phrases (outdated) | (S1/2), S26, S45, S61 |
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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 tetrachloride is an inorganic compound with chemical formula SCl4. It has only been obtained as an unstable pale yellow solid. The corresponding SF4 is a stable, useful reagent.
It is obtained by treating sulfur dichloride with chlorine at 193 K:
![{\displaystyle {\begin{matrix}{}\\{\ce {{SCl2}+Cl2->[{\ce {193~K}}]SCl4}}\\{}\end{matrix}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/afde53331e2cc16f6ba2b20b20f67af051863ab5)
()
It melts with simultaneous decomposition above −20 °C.
Its solid structure is uncertain. It is probably the salt SCl3+Cl−, since related salts are known with noncoordinating anions. In contrast to this tetrachloride, SF4 is a neutral molecule.
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