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Münster K, Baabe D, Kintzel B, Böhme M, Plass W, Raeder J, Walter MD. Low-Coordinate Iron(II) Amido Half-Sandwich Complexes with Large Internal Magnetic Hyperfine Fields. Inorg Chem 2022; 61:18883-18898. [DOI: 10.1021/acs.inorgchem.2c02768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Katharina Münster
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, Braunschweig38106, Germany
| | - Dirk Baabe
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, Braunschweig38106, Germany
| | - Benjamin Kintzel
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, Jena07743, Germany
| | - Michael Böhme
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, Jena07743, Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, Jena07743, Germany
| | - Jan Raeder
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, Braunschweig38106, Germany
| | - Marc D. Walter
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, Braunschweig38106, Germany
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Lauk S, Schäfer A. Pentaisopropyl Cyclopentadienyl: An Overview across the Periodic Table. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100770] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sergej Lauk
- Department of Chemistry, Faculty of Natural Sciences and Technology Saarland University Campus Saarbrücken 66123 Saarbrücken Germany
| | - André Schäfer
- Department of Chemistry, Faculty of Natural Sciences and Technology Saarland University Campus Saarbrücken 66123 Saarbrücken Germany
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Elsby MR, Ghostine K, Das UK, Gabidullin BM, Baker RT. Iron-SNS and -CNS Complexes: Selective Caryl–S Bond Cleavage and Amine-Borane Dehydrogenation Catalysis. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00524] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Matthew R. Elsby
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Karine Ghostine
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Uttam K. Das
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | | | - R. Tom Baker
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
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Gidt W, Smytschkow I, Sun Y, Langer J, Böttcher T, Kratzert D, Klingele J, Oelkers B, Sitzmann H. Paramagnetic Chromium(II) Complexes and Chromium(IV) Nitrides with Bulky Alkylcyclopentadienyl Ligands. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800901] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Wjatscheslaw Gidt
- FB Chemie TU Kaiserslautern Erwin‐Schrödinger‐Str. 54 67663 Kaiserslautern Germany
| | - Igor Smytschkow
- FB Chemie TU Kaiserslautern Erwin‐Schrödinger‐Str. 54 67663 Kaiserslautern Germany
| | - Yu Sun
- FB Chemie TU Kaiserslautern Erwin‐Schrödinger‐Str. 54 67663 Kaiserslautern Germany
| | - Jens Langer
- Department Chemie und Pharmazie Friedrich Alexander Universität Erlangen‐Nürnberg Lehrstuhl für Anorganische und Metallorganische Chemie Egerlandstr. 1 91058 Erlangen Germany
| | - Tobias Böttcher
- Institut für Anorganische und Analytische Chemie Albert‐Ludwigs‐Universität Freiburg Albertstr. 21 79104 Freiburg Germany
| | - Daniel Kratzert
- Institut für Anorganische und Analytische Chemie Albert‐Ludwigs‐Universität Freiburg Albertstr. 21 79104 Freiburg Germany
| | - Julia Klingele
- Institut für Anorganische und Analytische Chemie Albert‐Ludwigs‐Universität Freiburg Albertstr. 21 79104 Freiburg Germany
| | - Benjamin Oelkers
- FB Chemie TU Kaiserslautern Erwin‐Schrödinger‐Str. 54 67663 Kaiserslautern Germany
| | - Helmut Sitzmann
- FB Chemie TU Kaiserslautern Erwin‐Schrödinger‐Str. 54 67663 Kaiserslautern Germany
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Reiners M, Maekawa M, Baabe D, Zaretzke MK, Schweyen P, Daniliuc CG, Freytag M, Raeder J, Hohenberger J, Sutter J, Meyer K, Walter MD. Monomeric Fe(iii) half-sandwich complexes [Cp'FeX 2] - synthesis, properties and electronic structure. Dalton Trans 2018; 47:10517-10526. [PMID: 29924109 DOI: 10.1039/c8dt01570h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The half-sandwich complex [Cp'Fe(μ-I)]2 (1; Cp' = η5-1,2,4-(Me3C)3C5H2) is cleaved when heated in toluene to form a cation-anion pair [{Cp'Fe(η6-toluene)}+{Cp'FeI2}-] (2), in which the two Fe(ii) atoms adopt different spin states, i.e., a low-spin (S = 0) and a high-spin (S = 2) configuration. Upon oxidation of 1 with C2H4I2, the thermally stable 15VE species [Cp'FeI2] (3) can be isolated, in which the Fe(iii) atom adopts an intermediate spin (S = 3/2) configuration. Complex 3 is an excellent starting material for further functionalizations and it reacts with Mg(CH2SiMe3)2 to form the unprecedented Fe(iii) (S = 3/2) bis(alkyl) complex [Cp'Fe(CH2SiMe3)2] (4). The respective spin states of complexes 2-4 are confirmed by single-crystal X-ray crystallography, zero-field 57Fe Mössbauer spectroscopy, and solid-state magnetic susceptibility measurements. In contrast to the related 14VE high-spin (S = 2) Fe(ii) alkyl species [Cp'FeCH(SiMe3)2], which resists the reaction with H2 as a consequence of a spin-induced reaction barrier, complex 4 reacts cleanly with H2 (8 bar) in cyclohexane to yield iron hydrides [{Cp'Fe}2(μ-H)3] (5) and [Cp'Fe(μ-H)2]2 (6) in a 1 : 4 ratio. However, when the hydrogenation of 4 is carried out in benzene, a green 19VE [Cp'Fe(η6-C6H6)] (A) intermediate is formed, which dimerizes to the bis(cyclohexadienyl)-bridged product [(Cp'Fe)2(μ2-η5:η5-C12H12)] (7). Further evidence for the intermediacy of [Cp'Fe(η6-C6H6)] (A) was gathered by X-band EPR and UV/vis spectroscopy. Interestingly, attempts to oxidize 7 with AgSbF6 proceeded via C-C bond cleavage instead of metal oxidation to form [Cp'Fe(C6H6)][SbF6] (8).
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Affiliation(s)
- Matthias Reiners
- Technische Universität Braunschweig, Institut für Anorganische und Analytische Chemie, Hagenring 30, 38106 Braunschweig, Germany.
| | - Miyuki Maekawa
- Technische Universität Braunschweig, Institut für Anorganische und Analytische Chemie, Hagenring 30, 38106 Braunschweig, Germany.
| | - Dirk Baabe
- Technische Universität Braunschweig, Institut für Anorganische und Analytische Chemie, Hagenring 30, 38106 Braunschweig, Germany.
| | - Marc-Kevin Zaretzke
- Technische Universität Braunschweig, Institut für Anorganische und Analytische Chemie, Hagenring 30, 38106 Braunschweig, Germany.
| | - Peter Schweyen
- Technische Universität Braunschweig, Institut für Anorganische und Analytische Chemie, Hagenring 30, 38106 Braunschweig, Germany.
| | - Constantin G Daniliuc
- Technische Universität Braunschweig, Institut für Anorganische und Analytische Chemie, Hagenring 30, 38106 Braunschweig, Germany.
| | - Matthias Freytag
- Technische Universität Braunschweig, Institut für Anorganische und Analytische Chemie, Hagenring 30, 38106 Braunschweig, Germany.
| | - Jan Raeder
- Technische Universität Braunschweig, Institut für Anorganische und Analytische Chemie, Hagenring 30, 38106 Braunschweig, Germany.
| | - Johannes Hohenberger
- Friedrich-Alexander-University of Erlangen-Nürnberg (FAU), Department of Chemistry & Pharmacy, Inorganic Chemistry, Egerlandstr. 1, 91058 Erlangen, Germany
| | - Jörg Sutter
- Friedrich-Alexander-University of Erlangen-Nürnberg (FAU), Department of Chemistry & Pharmacy, Inorganic Chemistry, Egerlandstr. 1, 91058 Erlangen, Germany
| | - Karsten Meyer
- Friedrich-Alexander-University of Erlangen-Nürnberg (FAU), Department of Chemistry & Pharmacy, Inorganic Chemistry, Egerlandstr. 1, 91058 Erlangen, Germany
| | - Marc D Walter
- Technische Universität Braunschweig, Institut für Anorganische und Analytische Chemie, Hagenring 30, 38106 Braunschweig, Germany.
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