Input interpretation
phosphorus trisulfide
Chemical names and formulas
formula | P_2S_3 name | phosphorus trisulfide alternate names | phosphorus(III) sulfide mass fractions | P (phosphorus) 39.2% | S (sulfur) 60.8%
Lewis structure
Draw the Lewis structure of phosphorus trisulfide. Start by drawing the overall structure of the molecule, ignoring potential double and triple bonds: Count the total valence electrons of the phosphorus (n_P, val = 5) and sulfur (n_S, val = 6) atoms: 2 n_P, val + 3 n_S, val = 28 Calculate the number of electrons needed to completely fill the valence shells for phosphorus (n_P, full = 8) and sulfur (n_S, full = 8): 2 n_P, full + 3 n_S, full = 40 Subtracting these two numbers shows that 40 - 28 = 12 bonding electrons are needed. Each bond has two electrons, so in addition to the 4 bonds already present in the diagram add 2 bonds. To minimize formal charge sulfur wants 2 bonds and phosphorus wants 3 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
3D structure
Basic properties
molar mass | 158.1 g/mol
Units
Chemical identifiers
CAS number | 81129-00-2 PubChem CID number | 16211604 PubChem SID number | 24853413 SMILES identifier | P(=S)SP=S InChI identifier | InChI=1/P2S3/c3-1-5-2-4 MDL number | MFCD00152757