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Silicon tetrafluoride or tetrafluorosilane is a chemical compound with the formula Si F 4. This colorless gas is notable for having a narrow liquid range: its boiling point is only 4 °C above its melting point.
Silicon tetrafluoride | SiF4 or F4Si | CID 24556 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.
29 Απρ 2024 · Chemical formula sif4. Molecular weight 104.08. Colorless gas, asphyxiating odor, toxic! Melting Point -90.2 °c, boiling point -86 °c, -95.2 °c sublimation. Critical temperature -14.15 °c. Critical pressure 3.715MPA. The relative density was 4.69. Soluble in anhydrous ethanol, hydrofluoric acid and nitric acid, insoluble in ether.
Other names: Silane, tetrafluoro-; Silicon fluoride (SiF4); Tetrafluorosilane; SiF4; Silicon fluoride; UN 1859. Permanent link for this species. Use this link for bookmarking this species for future reference. Information on this page: Phase change data. Reaction thermochemistry data. Gas phase ion energetics data.
Chemical Properties of Silicon tetrafluoride (CAS 7783-61-1) PAff : Proton affinity (kJ/mol). BasG : Gas basicity (kJ/mol). SProt : Protonation entropy at 298K (J/mol×K). ΔfH°gas : Enthalpy of formation at standard conditions (kJ/mol).
Silicon tetrafluoride or tetrafluorosilane is a chemical compound with the formula Si F 4. This colorless gas is notable for having a narrow liquid range: its boiling point is only 4 °C above its melting point.
I can justify that $\ce{SF4}$ has the higher boiling point because it is more polar since its Lewis structure has a lone pair on the sulfur atom, and so it experiences greater dipole-dipole forces. However, why does $\ce{SF4}$ have a lower melting point?
