Low-Valent Iron Mono-Diazadiene Compounds: Electronic Structure and Catalytic Application

Crispin Lichtenberg, Mario Adelhardt, Thomas L. Gianetti, Karsten Meyer, Bas De Bruin, Hansjörg Grützmacher

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

A series of monodiazadiene diolefin iron compounds, [Fe(trop2dad)(L)] (4; L = neutral ligand), has been prepared by one-electron oxidation of the FeI species [NaFe(trop2dad)(thf)3] (dad = diazadiene; trop = 5H-dibenzo[a,d]cyclohepten-5-yl). The electronic structures of compounds 4 were investigated by NMR and Mössbauer spectroscopy, single-crystal X-ray diffraction, solid- and liquid-phase magnetic susceptibility measurements, and DFT calculations. Compounds of type 4 with labile ligands L were found to be active (pre)catalysts for the dehydrogenative coupling of (alkyl)amine-boranes. Remarkably high activities were observed, especially for the homogeneous dehydrogenative polymerization of methylamine-borane.

Original languageEnglish (US)
Pages (from-to)6230-6240
Number of pages11
JournalACS Catalysis
Volume5
Issue number10
DOIs
StatePublished - Oct 2 2015
Externally publishedYes

Keywords

  • dehydrogenative polymerization
  • electronic structure determination
  • homogeneous catalysis
  • iron diazadiene compounds
  • methylamine-borane

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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