title: Synthesis and characterization of an iron complex bearing a cyclic tetra-N-heterocyclic carbene ligand: an artifical heme analogue?
abstract: An iron(II) complex with a cyclic tetradentate ligand containing four N-heterocyclic carbenes was synthesized and characterized by means of NMR and IR spectroscopies, as well as by single-crystal X-ray structure analysis. The iron center exhibits an octahedral coordination geometry with two acetonitrile ligands in axial positions, showing structural analogies with porphyrine-ligated iron complexes. The acetonitrile ligands can readily be substituted by other ligands, for instance, dimethyl sulfoxide, carbon monoxide, and nitric oxide. Cyclic voltammetry was used to examine the electronic properties of the synthesized compounds.
authors.affiliation: †Chair of Inorganic Chemistry/Molecular Catalysis, Catalysis Research Center, Ernst-Otto-Fischer-Strasse 1 and Faculty of Chemistry, Lichtenbergstrasse 4, Technische Universität München (TUM), D-85747 Garching bei München, Germany.
authors.forename: Markus R
authors.initials: MR
authors.lastname: Anneser
authors.affiliation: †Chair of Inorganic Chemistry/Molecular Catalysis, Catalysis Research Center, Ernst-Otto-Fischer-Strasse 1 and Faculty of Chemistry, Lichtenbergstrasse 4, Technische Universität München (TUM), D-85747 Garching bei München, Germany.
authors.forename: Stefan
authors.initials: S
authors.lastname: Haslinger
authors.affiliation: †Chair of Inorganic Chemistry/Molecular Catalysis, Catalysis Research Center, Ernst-Otto-Fischer-Strasse 1 and Faculty of Chemistry, Lichtenbergstrasse 4, Technische Universität München (TUM), D-85747 Garching bei München, Germany.
authors.forename: Alexander
authors.initials: A
authors.lastname: Pöthig
authors.affiliation: †Chair of Inorganic Chemistry/Molecular Catalysis, Catalysis Research Center, Ernst-Otto-Fischer-Strasse 1 and Faculty of Chemistry, Lichtenbergstrasse 4, Technische Universität München (TUM), D-85747 Garching bei München, Germany.
authors.forename: Mirza
authors.initials: M
authors.lastname: Cokoja
authors.affiliation: ‡KAUST Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal, Kingdom of Saudi Arabia.
authors.forename: Jean-Marie
authors.initials: JM
authors.lastname: Basset
authors.affiliation: †Chair of Inorganic Chemistry/Molecular Catalysis, Catalysis Research Center, Ernst-Otto-Fischer-Strasse 1 and Faculty of Chemistry, Lichtenbergstrasse 4, Technische Universität München (TUM), D-85747 Garching bei München, Germany.
authors.forename: Fritz E
authors.initials: FE
authors.lastname: Kühn
mesh_terms: D018360:Crystallography, X-Ray; D005296:Ferrous Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D006571:Heterocyclic Compounds / Q000737:chemistry*; D008024:Ligands; D008697:Methane / Q000031:analogs & derivatives* / Q000737:chemistry; D008958:Models, Molecular; D015394:Molecular Structure
chemical_list: D005296:Ferrous Compounds; D006571:Heterocyclic Compounds; D008024:Ligands; C030011:carbene; D008697:Methane