silicon disulfide

silicon disulfide

formula | S_2Si name | silicon disulfide IUPAC name | disulfanylidenesilane alternate names | silicon disulphide | silicone disulfide | silicon sulfide mass fractions | S (sulfur) 69.5% | Si (silicon) 30.5%

Draw the Lewis structure of silicon disulfide. Start by drawing the overall structure of the molecule, ignoring potential double and triple bonds: Count the total valence electrons of the sulfur (n_S, val = 6) and silicon (n_Si, val = 4) atoms: 2 n_S, val + n_Si, val = 16 Calculate the number of electrons needed to completely fill the valence shells for sulfur (n_S, full = 8) and silicon (n_Si, full = 8): 2 n_S, full + n_Si, full = 24 Subtracting these two numbers shows that 24 - 16 = 8 bonding electrons are needed. Each bond has two electrons, so in addition to the 2 bonds already present in the diagram add 2 bonds. To minimize formal charge sulfur wants 2 bonds and silicon wants 4 bonds. Identify the atoms that want additional bonds and the number of electrons remaining on each atom: Fill in the 2 bonds by pairing electrons between adjacent highlighted atoms: Answer: | |

3D structure

molar mass | 92.21 g/mol phase | solid (at STP) melting point | 1090 °C density | 2.02 g/cm^3

density | 2.02 g/cm^3

CAS number | 13759-10-9 PubChem CID number | 83705 SMILES identifier | [Si](=S)=S InChI identifier | InChI=1/S2Si/c1-3-2 EU number | 237-344-8

NFPA label

NFPA health rating | 2 NFPA fire rating | 2 NFPA reactivity rating | 3