A Theoretical Study of Hydrogen Transfer Catalyzed by an Ir(III) PC(sp(3))P Pincer Complex Academic Article uri icon

abstract

  • A hydrogen transfer mechanism catalyzed by an IrIII PC (sp3) P pincer complex was studied by using DFT, and its efficiency was estimated by using the energetic span model. With the pristine complex, a hydrogen abstraction pathway could not be found, since a ligand dissociation to generate a vacant site is energetically costly. However, a nucleophilic attack of an alkoxide base (present in the reaction mixture) on the carbonyl ligand to form a carboalkoxy ligand generated an anionic catalyst that could easily provide the free site. From there, a hydride abstraction from an isopropyl ion (iPrO−) followed by a hydride transfer to acetophenone resulted in an efficient catalytic cycle.

publication date

  • January 1, 2011