Dibenzothiophene

Dibenzothiophene

Names
IUPAC name Dibenzothiophene
Other names Diphenylene sulfide, DBT
Identifiers
CAS Number	132-65-0 Y
3D model (JSmol)	Interactive image
ChemSpider	2915 Y
ECHA InfoCard	100.004.613
RTECS number	HQ3490550
UNII	Z3D4AJ1R48 Y
CompTox Dashboard (EPA)	DTXSID0047741
InChI InChI=1S/C12H8S/c1-3-7-11-9(5-1)10-6-2-4-8-12(10)13-11/h1-8H Key: IYYZUPMFVPLQIF-UHFFFAOYSA-N InChI=1/C12H8S/c1-3-7-11-9(5-1)10-6-2-4-8-12(10)13-11/h1-8H Key: IYYZUPMFVPLQIF-UHFFFAOYAY
SMILES c1ccc2c(c1)c3ccccc3s2
Properties
Chemical formula	C12H8S
Molar mass	184.26 g/mol
Appearance	Colourless crystals
Density	1.252 g/cm3
Melting point	97-100 °C(lit.)
Boiling point	332-333 °C
Solubility in water	insol.
Solubility in other solvents	benzene and related
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	flammable
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) Infobox references

Dibenzothiophene is the organosulfur compound consisting of two benzene rings fused to a central thiophene ring. It is a colourless solid that is chemically somewhat similar to anthracene. This tricyclic heterocycle, and especially its alkyl substituted derivatives, occur widely in heavier fractions of petroleum.

Synthesis and reactions

Dibenzothiophene is prepared by the reaction of biphenyl with sulfur dichloride in the presence of aluminium trichloride.

Reduction with lithium results in scission of one C-S bond. S-oxidation occurs to give the sulfone, which is more labile than the parent dibenzothiophene. With butyl lithium, this heterocycle undergoes stepwise lithiation at the 4- and 6- positions.