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Antimony triiodide

Antimony triiodide
Names IUPAC name
Antimony triiodide, Antimony(III) iodide
Systematic IUPAC name
Triiodostibane
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard100.029.278EC Number
  • 232-205-8
UNII
  • InChI=1S/3HI.Sb/h3*1H;/q;;;+3/p-3
    Key: KWQLUUQBTAXYCB-UHFFFAOYSA-K
  • InChI=1/3HI.Sb.3H/h3*1H;;;;/q;;;+3;;;/p-3/r3HI.H3Sb/h3*1H;1H3/q;;;+3/p-3
    Key: JYIUOADDPFDEAV-GODZFDHEAT
  • InChI=1/3HI.Sb/h3*1H;/q;;;+3/p-3
    Key: KWQLUUQBTAXYCB-DFZHHIFOAA
  • [SbH3+3].[I-].[I-].[I-]
  • I[Sb](I)I
Properties I3SbMolar mass502.473 g·mol Appearance red crystals Density4.921 g/cm Melting point170.5 °C (338.9 °F; 443.6 K) Boiling point401.6 °C (754.9 °F; 674.8 K) soluble, partially hydrolyses Solubilitysoluble in benzene, alcohol, acetone, CS2, HCl, KI, SnCl4, C2H7N, HI, alkali metal triiodides

insoluble in CHCl3, CCl4

Solubility in diiodomethane10.15% v/v (12 °C) −147.0·10 cm/mol Structure Rhombohedral, hR24, R-3, No. 148 1.58 D Thermochemistry 81.6 J/mol·K (gas) −100.4 kJ/mol Hazards GHS labelling: WarningH302, H332, H411P273NIOSH (US health exposure limits):
PEL (Permissible)
TWA 0.5 mg/m (as Sb)
REL (Recommended)
TWA 0.5 mg/m (as Sb) Related compounds
Other anions
Antimony trifluoride
Antimony trichloride
Antimony tribromide
Other cations
Nitrogen triiodide
Phosphorus triiodide
Arsenic triiodide
Bismuth iodide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Antimony triiodide is the chemical compound with the formula SbI3. This ruby-red solid is the only characterized "binary" iodide of antimony, i.e. the sole compound isolated with the formula SbxIy. It contains antimony in its +3 oxidation state. Like many iodides of the heavier main group elements, its structure depends on the phase. Gaseous SbI3 is a molecular, pyramidal species as anticipated by VSEPR theory. In the solid state, however, the Sb center is surrounded by an octahedron of six iodide ligands, three of which are closer and three more distant. For the related compound BiI3, all six Bi—I distances are equal.

Wikipedia source