Formula C12H8S Density 1.25 g/cm³ | Molar mass 184.26 g/mol Appearance Colourless crystals | |
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Dibenzothiophene (DBT) 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.
References
Dibenzothiophene Wikipedia(Text) CC BY-SA