Characterization of a Borane σ Complex of a Diiron Dithiolate: Model for an Elusive Dihydrogen Adduct.

ABSTRACT: The azadithiolate complex Fe₂[(SCH₂)₂₆NMe](CO)₆ reacts with borane to give an initial 1:1 adduct, which spontaneously decarbonylates to give Fe₂[(SCH₂)₂NMeBH₃](CO)₅. Featuring a Fe-H-B three-center, two-electron interaction, the pentacarbonyl complex is a structural model for H₂ complexes invoked in the [FeFe]-hydrogenases. The pentacarbonyl compound is a "σ complex", where a B-H σ bond serves as a ligand for iron. The structure of this σ complex was characterized by variable-temperature NMR spectroscopy and X-ray crystallography. Complementary to the 1:1 borane adduct is the quaternary ammonium complex [Fe₂](SCH₂)₂NMe₂

SUBMITTER: Lalaoui N 

PROVIDER: S-EPMC5538135 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature