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Teaching old compounds new tricks: efficient N2 fixation by simple Fe(N2)(diphosphine)2 complexes.

Laurence R Doyle1, Peter J Hill1, Gregory G Wildgoose2

  • 1Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London SW7 2AZ, UK. a.ashley@imperial.ac.uk.

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|April 15, 2016
PubMed
Summary
This summary is machine-generated.

Iron complexes Fe(N2)(dmpe)2 and Fe(N2)(depe)2 can produce ammonia or hydrazine. The Fe(N2)(depe)2 complex shows high electron conversion efficiency, marking a significant advancement in iron-based catalysis.

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Area of Science:

  • Inorganic Chemistry
  • Catalysis
  • Nitrogen Fixation

Background:

  • Iron complexes are crucial in nitrogen fixation research.
  • Understanding the reactivity of low-valent iron complexes with nitrogen is essential.

Purpose of the Study:

  • To investigate the reactivity of Fe(N2)(dmpe)2 and Fe(N2)(depe)2 complexes.
  • To characterize the previously unreported dimer [Fe(dmpe2)2(μ-N2)].
  • To evaluate the potential of these complexes in producing ammonia and hydrazine.

Main Methods:

  • Synthesis and characterization of iron-nitrogen complexes.
  • Equilibrium studies to identify complex species.
  • Acid-catalyzed reactions to assess product formation (N2H4, NH3).

Main Results:

  • Fe(N2)(dmpe)2 was found to be in equilibrium with its dimer, [Fe(dmpe2)2(μ-N2)].
  • Both Fe(N2)(dmpe)2 and Fe(N2)(depe)2 unambiguously produced N2H4 and/or NH3 upon addition of triflic acid.
  • Fe(N2)(depe)2 demonstrated high electron conversion efficiency for ammonia/hydrazine production.

Conclusions:

  • This study reports novel iron complexes and their catalytic activity.
  • The findings highlight the potential of iron complexes in nitrogen reduction.
  • Fe(N2)(depe)2 represents a highly efficient catalyst for nitrogen conversion.