Input interpretation
silicon tetraiodide
Chemical names and formulas
formula | SiI_4 Hill formula | I_4Si name | silicon tetraiodide IUPAC name | tetraiodosilane alternate names | silane, tetraiodo- | silicon iodide | silicon(IV) iodide | tetraiodosilane mass fractions | I (iodine) 94.8% | Si (silicon) 5.24%
Lewis structure
Draw the Lewis structure of silicon tetraiodide. Start by drawing the overall structure of the molecule: Count the total valence electrons of the iodine (n_I, val = 7) and silicon (n_Si, val = 4) atoms: 4 n_I, val + n_Si, val = 32 Calculate the number of electrons needed to completely fill the valence shells for iodine (n_I, full = 8) and silicon (n_Si, full = 8): 4 n_I, full + n_Si, full = 40 Subtracting these two numbers shows that 40 - 32 = 8 bonding electrons are needed. Each bond has two electrons, so the above diagram has all the necessary bonds. 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 32 - 8 = 24 electrons left to draw: Answer: | |
3D structure
3D structure
Basic properties
molar mass | 535.703 g/mol phase | solid (at STP) melting point | 120.5 °C boiling point | 287.4 °C density | 4.198 g/cm^3 solubility in water | insoluble
Units
Solid properties (at STP)
density | 4.198 g/cm^3 vapor pressure | 0.0043 mmHg (at 25 °C)
Units
Thermodynamic properties
specific heat of formation Δ_fH° | solid | -0.3537 kJ/g molar heat of formation Δ_fH° | solid | -189.5 kJ/mol molar heat of vaporization | 52 kJ/mol | specific heat of vaporization | 0.0971 kJ/g | molar heat of fusion | 19.7 kJ/mol | specific heat of fusion | 0.0368 kJ/g | critical temperature | 944 K | (at STP)
Chemical identifiers
(I)(I)I InChI identifier | InChI=1/I4Si/c1-5(2, 3)4 MDL number | MFCD00054041](../image_source/1b6de871ea76ef7eb7e92b140d206a90.png)
CAS number | 13465-84-4 PubChem CID number | 83498 PubChem SID number | 24870305 SMILES identifier | [Si](I)(I)(I)I InChI identifier | InChI=1/I4Si/c1-5(2, 3)4 MDL number | MFCD00054041
Safety properties
flash point | -18 °C
DOT hazard class | 8 DOT numbers | 3260