Hexaiodobenzene

Hexaiodobenzene
Names
	Preferred IUPAC name Hexaiodobenzene
	Other names Periodobenzene
Identifiers
CAS Number	608-74-2;
3D model (JSmol)	Interactive image;
ChemSpider	11360;
ECHA InfoCard	100.009.246
PubChem CID	11853;
UNII	L3RDK4VNA8 ;
CompTox Dashboard (EPA)	DTXSID5060562 ;
	InChI InChI=1S/C6I6/c7-1-2(8)4(10)6(12)5(11)3(1)9 Key: QNMKKFHJKJJOMZ-UHFFFAOYSA-N; InChI=1/C6I6/c7-1-2(8)4(10)6(12)5(11)3(1)9 Key: QNMKKFHJKJJOMZ-UHFFFAOYAO;
	SMILES C1(=C(C(=C(C(=C1I)I)I)I)I)I;
Properties
Chemical formula	C6I6
Molar mass	833.493 g·mol−1
Appearance	orange crystals
Density	4.60 g/cm3
Melting point	430 °C (806 °F; 703 K)
Solubility in water	insoluble
Structure
Crystal structure	monoclinic
Space group	P21/c, No. 14
Lattice constant	a = 8.87 Å, b = 4.29 Å, c = 16.28 Å α = 90°, β = 93°, γ = 90°
Related compounds
Related compounds	Hexafluorobenzene; Hexachlorobenzene; Hexabromobenzene
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Hexaiodobenzene is an aryl iodide and a six-substituted iodobenzene with the formula C₆I₆. Structurally, it is a derivative of benzene, in which all hydrogen atoms are replaced by iodine atoms. It forms orange crystals that are poorly soluble in all solvents. It adopts the expected structure with a central C₆ ring.