Boron triiodide

Boron triiodide

Names
IUPAC name triiodoborane
Identifiers
CAS Number	13517-10-7 N
3D model (Jmol)	Interactive image
ChemSpider	75378 Y
ECHA InfoCard	100.033.492
PubChem	83546
RTECS number	ED7400000
InChI InChI=1S/BI3/c2-1(3)4 Y Key: YMEKEHSRPZAOGO-UHFFFAOYSA-N Y InChI=1/BI3/c2-1(3)4 Key: YMEKEHSRPZAOGO-UHFFFAOYAR
SMILES IB(I)I
Properties
Chemical formula	BI3
Molar mass	391.52 g/mol
Appearance	crystalline solid
Density	3.35 g/cm3 (50 °C)
Melting point	49.9 °C (121.8 °F; 323.0 K)
Boiling point	210 °C (410 °F; 483 K)
Solubility in water	reacts
Solubility	soluble in CCl4, CS2, benzene, chloroform
Dipole moment	0D
Structure
Crystal structure	trigonal
Thermochemistry
Specific heat capacity (C)	71 J/mol K
Std molar entropy (So298)	200 J/mol K
Std enthalpy of formation (ΔfHo298)	-37.2 kJ/mol
Hazards
Safety data sheet	Sigma-Aldrich
NFPA 704	0 3 0
Flash point	−18 °C (0 °F; 255 K)
Related compounds
Related compounds	Boron trifluoride Boron trichloride Boron tribromide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YN ?)
Infobox references

Boron triiodide is a chemical compound of boron and iodine with chemical formula BI₃. It has a trigonal planar molecular geometry. It is a crystalline solid, which reacts vigorously with water to form boric acid. Its dielectric constant is 5.38 and its heat of vaporization is 40.5 kJ/mol. At extremely high pressures, BI₃ becomes metallic at ~23 GPa and is a superconductor above ~27 GPa.

Boron triiodide can be prepared by the reaction of boron with iodine at 209.5 °C or 409.1 °F. It can also be prepared by this other method: ${\displaystyle {\ce {{3HI}+BCl3->{BI3}+3HCl}}}$ (this reaction requires high temperature).