title: Thiophene and butadiene-thiolate complexes of molybdenum: observations relevant to the mechanism of hydrodesulfurization.
abstract: Mo(PMe3)6 reacts with thiophene to give the eta5-thiophene complex (eta5-C4H4S)Mo(PMe3)3 and the eta5-butadiene-thiolate complex (eta5-C4H5S)Mo(PMe3)2(eta2-CH2PMe2), which are the first examples of (i) eta5-thiophene coordination and (ii) C-S cleavage and hydrogenation by a molybdenum compound. Deuterium labeling studies suggest that the hydrogenation of thiophene may involve an alkylidene intermediate, an observation that has ramifications for the mechanisms of hydrodesulfurization.
authors.affiliation: Department of Chemistry, Columbia University, New York, New York 10027, USA.
authors.forename: Kevin E
authors.initials: KE
authors.lastname: Janak
authors.forename: Joseph M
authors.initials: JM
authors.lastname: Tanski
authors.forename: David G
authors.initials: DG
authors.lastname: Churchill
authors.forename: Gerard
authors.initials: G
authors.lastname: Parkin