Input interpretation
arsenic trioxide
Chemical names and formulas
![formula | As_2O_3 name | arsenic trioxide IUPAC name | 2, 4, 5-trioxa-1, 3-diarsabicyclo[1.1.1]pentane alternate names | arsenic(III) oxide mass fractions | As (arsenic) 75.7% | O (oxygen) 24.3%](../image_source/79c8a08511446d99e79ffcded8bae682.png)
formula | As_2O_3 name | arsenic trioxide IUPAC name | 2, 4, 5-trioxa-1, 3-diarsabicyclo[1.1.1]pentane alternate names | arsenic(III) oxide mass fractions | As (arsenic) 75.7% | O (oxygen) 24.3%
Lewis structure
Draw the Lewis structure of arsenic trioxide. Start by drawing the overall structure of the molecule, ignoring potential double and triple bonds: Count the total valence electrons of the arsenic (n_As, val = 5) and oxygen (n_O, val = 6) atoms: 2 n_As, val + 3 n_O, val = 28 Calculate the number of electrons needed to completely fill the valence shells for arsenic (n_As, full = 8) and oxygen (n_O, full = 8): 2 n_As, full + 3 n_O, 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 arsenic wants 3 bonds and oxygen wants 2 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: | |
Basic properties
molar mass | 197.84 g/mol phase | solid (at STP) melting point | 312 °C boiling point | 465 °C density | 4.15 g/cm^3
Units
Basic drug properties
approval status | approved | investigational | small molecule drug categories | antineoplastic agent | homeopathic agent dosage forms | oral: tablet
brand names | arsenite | arsenolite | arsodent | claudelite | claudetite | trisenox
Solid properties (at STP)
density | 4.15 g/cm^3 vapor pressure | 2×10^-4 mmHg (at 25 °C)
Units
Thermodynamic properties
molar heat of vaporization | 125.1 kJ/mol specific heat of vaporization | 0.6323 kJ/g molar heat of fusion | 18.4 kJ/mol specific heat of fusion | 0.093 kJ/g (at STP)
Chemical identifiers
![CAS number | 1327-53-3 PubChem CID number | 261004 PubChem SID number | 24852110 SMILES identifier | O=[As]O[As]=O InChI identifier | InChI=1/As2O3/c3-1-5-2-4 InChI key | GOLCXWYRSKYTSP-UHFFFAOYAM RTECS number | CG3325000 MDL number | MFCD00003433](../image_source/fa4964df4f29f3f467f1ebb6cef4bbe3.png)
CAS number | 1327-53-3 PubChem CID number | 261004 PubChem SID number | 24852110 SMILES identifier | O=[As]O[As]=O InChI identifier | InChI=1/As2O3/c3-1-5-2-4 InChI key | GOLCXWYRSKYTSP-UHFFFAOYAM RTECS number | CG3325000 MDL number | MFCD00003433
NFPA label
NFPA label
NFPA health rating | 3 NFPA fire rating | 0 NFPA reactivity rating | 0
Toxicity properties
RTECS classes | agricultural chemical and pesticide | tumorigen | drug | mutagen | reproductive effector | human data