Input interpretation
sulfur tetrafluoride
Chemical names and formulas
formula | SF_4 name | sulfur tetrafluoride alternate names | sulfur fluoride | sulfur fluoride (SF4), (t-4)- | sulphur tetrafluoride | tetrafluorosulfurane mass fractions | F (fluorine) 70.3% | S (sulfur) 29.7%
Lewis structure
Draw the Lewis structure of sulfur tetrafluoride. Start by drawing the overall structure of the molecule: Count the total valence electrons of the fluorine (n_F, val = 7) and sulfur (n_S, val = 6) atoms: 4 n_F, val + n_S, val = 34 Calculate the number of electrons needed to completely fill the valence shells for fluorine (n_F, full = 8) and sulfur (n_S, full = 8): 4 n_F, full + n_S, full = 40 Subtracting these two numbers shows that 40 - 34 = 6 bonding electrons are needed, which are already accounted for in the structure. Note that the valence shell of sulfur has been expanded. After accounting for the expanded valence, there are 4 bonds and hence 8 bonding electrons in the diagram. Lastly, fill in the remaining unbonded electrons on each atom. In total, there remain 34 - 8 = 26 electrons left to draw: Answer: | |
3D structure
3D structure
Basic properties
molar mass | 108.05 g/mol phase | gas (at STP) melting point | -123.9 °C boiling point | 4.84 °C density | 0.004417 g/cm^3 (at 25 °C) solubility in water | decomposes
Units
Gas properties (at STP)
density | 0.004417 g/cm^3 (at 25 °C) vapor density | 3.78 (relative to air) molar volume | 24460 cm^3/mol
Units
Thermodynamic properties
specific free energy of formation Δ_fG° | gas | -6.682 kJ/g molar free energy of formation Δ_fG° | gas | -722 kJ/mol specific heat of formation Δ_fH° | gas | -7.063 kJ/g molar heat of formation Δ_fH° | gas | -763.2 kJ/mol critical temperature | 364 K | (at STP)
Chemical identifiers
CAS number | 7783-60-0 PubChem CID number | 24555 SMILES identifier | FS(F)(F)F InChI identifier | InChI=1/F4S/c1-5(2, 3)4 EU number | 232-013-4 Gmelin number | 2072 RTECS number | WT4800000
Toxicity properties
short-term exposure limit | 1 mg/m^3
long-term exposure limit | 0.4 mg/m^3 (over 8 hours) RTECS classes | other