title: C-H bond activation and S-atom transfer from cobalt(III) thiolate and isothiocyanate complexes.
abstract: The cobalt phenylthiolate complex, cis,mer-(PMe3)3Co(CH3)2SPh, was found to undergo competitive two-electron ethane reductive elimination and C-H bond cyclometallation. The thiophenolato bound cobaltacycle was generated via C-H bond oxidative addition to a five-coordinate intermediate followed by rapid methane elimination. A related cobalt isothiocyanate complex, cis,mer-(PMe3)3Co(CH3)2NCS, was also prepared and found to perform ethane elimination and S-atom transfer to yield trimethylphosphine sulfide. This rare example of S-atom donation from a isothiocyanate was characterized by NMR and GC-MS analysis, with cis,mer-(PMe3)3Co(CH3)2CN identified as one of the cobalt based products.
authors.affiliation: Department of Chemistry, Brown University, Providence, RI 02912, USA. wb36@brown.edu.
authors.forename: Hongwei
authors.initials: H
authors.lastname: Xu
authors.forename: Paul G
authors.initials: PG
authors.lastname: Williard
authors.forename: Wesley H
authors.initials: WH
authors.lastname: Bernskoetter