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Reversible dinitrogen binding to [Cp'Fe(NHC)] associated with an N2-induced spin state change
Matthias Reiners1, Dirk Baabe, Marc-Kevin Zaretzke
1Institut für Anorganische und Analytische Chemie, Technische Universität, Braunschweig, Hagenring 30, 38106 Braunschweig, Germany. mwalter@tu-bs.de.
Chemical Communications (Cambridge, England)
|April 11, 2017
Summary
A novel iron complex with 15 valence electrons reversibly binds nitrogen gas. This forms a new 17 valence electron compound, demonstrating unique reactivity in organometallic chemistry.
Area of Science:
- Organometallic Chemistry
- Coordination Chemistry
- Inorganic Chemistry
Background:
- Half-sandwich iron complexes are key in catalysis.
- Valence electron counts dictate complex reactivity.
- Nitrogen coordination is a fundamental transformation.
Purpose of the Study:
- To synthesize and characterize a 15-valence electron iron complex.
- To investigate the reversible nitrogen coordination of this complex.
- To determine the electronic and spin state changes upon nitrogen binding.
Main Methods:
- Synthesis of the [Cp'Fe(IiPr2Me2)] complex.
- Characterization using spectroscopic techniques.
- X-ray crystallography of the resulting nitrogen adduct.
Main Results:
- The 15-valence electron, high-spin iron complex [Cp'Fe(IiPr2Me2)] was synthesized.
- This complex reversibly coordinates N2.
- The product is a 17-valence electron, low-spin complex, [Cp'Fe(IiPr2Me2)(η1-N2)].
Conclusions:
- The iron complex exhibits tunable electronic properties.
- Reversible nitrogen coordination is achieved.
- Spin state changes are linked to valence electron count and N2 binding.