No abstract

The reaction of dibenzothiophene (DBT) with [Ru3(CO)12] in heptane affords the dinuclear complex [Ru2(C12H8)(μ-CO)(CO)5], derived from a double C−S bond activation−desulfurization process. The reaction of this complex with H2 under very mild conditions leads to the release of biphenyl.

No abstract

The reactivity of Grignard reagents in the presence of nickel catalysts is known to be highly efficient in the deoxydesulfurization of dibenzothiophene sulfone (DBTO 2 ), 4-methyldibenzothiophene (4-MeDBTO 2 ), and 4,6-dimethyldibenzothiophene (4,6-Me 2 DBTO 2 ), to yield sulfur-free biphenyls via cross-coupling reactions. However, the mechanistic details involved in the process remained unknown. In this report the reactivity of [(dippe)Pt(μ-H)] 2 with DBTO 2 turned out to be catalytically less efficient compared with [(dippe)Ni(μ-H)] 2 , but the first allowed the isolation and full characterization of several reaction intermediates, such as [(dippe)Pt(κ 2 -C,S-DBTO 2 )]. It was demonstrated that this is a key intermediate in all the deoxydesulfurization reactions of the above-mentioned aromatic sulfones (DBTsO 2 ).