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Activation of a (cyclooctadiene) rhodium(i) complex supported by a chiral ferrocenyl phosphine thioether ligand for hydrogenation catalysis: A combined parahydrogen NMR and DFT study

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Publication details

JournalDalton Transactions
DatePublished - 28 Sep 2013
Issue number32
Pages (from-to)11720-11730
Original languageEnglish


The reaction of [RhCl(P,SBu)(COD)] (1) or [Rh(P,S Bu)(COD)]BF (2) where (P,SBu) is CpFe[η-1,2-CH(PPh)(CH SBu)] with H in MeOH gives rise to COD hydrogenation and formation of a solvent-stabilized product. The formation of hydride species cannot be observed in view of a very rapid H/D exchange between H and the solvent. Introduction of pyridine or acetonitrile slows down this exchange process and allows observation of diastereometric dihydride complexes, [Rh(P,SBu)(H)(L)], the stereochemistry of which was fully elucidated. The hydride site exchange rates have been derived from EXSY NMR experiments and used, with assistance from DFT calculation, to elucidate the isomerization and site exchange mechanisms.


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