Journal of Molecular Catalysis A: Chemical p. 103 - 109 (2016)
Update date:2022-08-17
Topics:
Marozsán, Natália
Horváth, Henrietta
Erdei, Anikó
Joó, Ferenc
Water-soluble [RuCl(NHC)(L)(η6-arene)] complexes (NHC?=?bmim?=?1-butyl-3-methyl-imidazole-2-ylidene;?L?=?tertiary phosphine, such as mtppms, mtppts, pta, pta-Me and pta-Bn; η6-arene?=?η6-p-cymene) were succesfully applied for the first time as catalysts in hydrodehalogenation of organic halides by hydrogen transfer from aqueous Na-formate with turnover frequencies up to TOF?=?112?h?1 at 80?°C. Simultaneous to hydrodehalogenation, aqueous formate was also decomposed to H2 and HCO3?. In case of [RuCl(bmim)(pta)(η6-p-cymene)]Cl (pta?=?1,3,5-triaza-7-phosphaadamantane) a reaction mechanism is suggested on basis of kinetic and NMR measurements which accounts for both hydrodehalogenation and formate dehydrogenation and involves [RuH(bmim)(pta)(η6-p-cymene)]+ as the key catalytic species for both cycles.
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