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Landaeta VR, Horsley Downie TM, Wolf R. Low-Valent Transition Metalate Anions in Synthesis, Small Molecule Activation, and Catalysis. Chem Rev 2024; 124:1323-1463. [PMID: 38354371 PMCID: PMC10906008 DOI: 10.1021/acs.chemrev.3c00121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 10/09/2023] [Accepted: 10/09/2023] [Indexed: 02/16/2024]
Abstract
This review surveys the synthesis and reactivity of low-oxidation state metalate anions of the d-block elements, with an emphasis on contributions reported between 2006 and 2022. Although the field has a long and rich history, the chemistry of transition metalate anions has been greatly enhanced in the last 15 years by the application of advanced concepts in complex synthesis and ligand design. In recent years, the potential of highly reactive metalate complexes in the fields of small molecule activation and homogeneous catalysis has become increasingly evident. Consequently, exciting applications in small molecule activation have been developed, including in catalytic transformations. This article intends to guide the reader through the fascinating world of low-valent transition metalates. The first part of the review describes the synthesis and reactivity of d-block metalates stabilized by an assortment of ligand frameworks, including carbonyls, isocyanides, alkenes and polyarenes, phosphines and phosphorus heterocycles, amides, and redox-active nitrogen-based ligands. Thereby, the reader will be familiarized with the impact of different ligand types on the physical and chemical properties of metalates. In addition, ion-pairing interactions and metal-metal bonding may have a dramatic influence on metalate structures and reactivities. The complex ramifications of these effects are examined in a separate section. The second part of the review is devoted to the reactivity of the metalates toward small inorganic molecules such as H2, N2, CO, CO2, P4 and related species. It is shown that the use of highly electron-rich and reactive metalates in small molecule activation translates into impressive catalytic properties in the hydrogenation of organic molecules and the reduction of N2, CO, and CO2. The results discussed in this review illustrate that the potential of transition metalate anions is increasingly being tapped for challenging catalytic processes with relevance to organic synthesis and energy conversion. Therefore, it is hoped that this review will serve as a useful resource to inspire further developments in this dynamic research field.
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Affiliation(s)
| | | | - Robert Wolf
- University of Regensburg, Institute
of Inorganic Chemistry, 93040 Regensburg, Germany
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2
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Hierlmeier G, Coburger P, Scott DJ, Maier TM, Pelties S, Wolf R, Pividori DM, Meyer K, van Leest NP, de Bruin B. Di-tert-butyldiphosphatetrahedrane as a Source of 1,2-Diphosphacyclobutadiene Ligands. Chemistry 2021; 27:14936-14946. [PMID: 34424579 PMCID: PMC8596834 DOI: 10.1002/chem.202102335] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Indexed: 11/18/2022]
Abstract
Reactions of di‐tert‐butyldiphosphatetrahedrane (1) with cycloocta‐1,5‐diene‐ or anthracene‐stabilised metalate anions of iron and cobalt consistently afford complexes of the rarely encountered 1,2‐diphosphacyclobutadiene ligand, which have previously been very challenging synthetic targets. The subsequent reactivity of 1,2‐diphosphacyclobutadiene cobaltates toward various electrophiles has also been investigated and is compared to reactions of related 1,3‐diphosphacyclobutadiene complexes. The results highlight the distinct reactivity of such isomeric species, showing that the 1,2‐isomers can act as precursors for previously unknown triphospholium ligands. The electronic structures of the new complexes were investigated by several methods, including NMR, EPR and Mößbauer spectroscopies as well as quantum chemical calculations.
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Affiliation(s)
- Gabriele Hierlmeier
- Institut für Anorganische Chemie, Universität Regensburg, 93040, Regensburg, Germany
| | - Peter Coburger
- Institut für Anorganische Chemie, Universität Regensburg, 93040, Regensburg, Germany.,present address: Laboratory of Inorganic Chemistry, ETH Zürich, 8093, Zürich, Switzerland
| | - Daniel J Scott
- Institut für Anorganische Chemie, Universität Regensburg, 93040, Regensburg, Germany
| | - Thomas M Maier
- Institut für Anorganische Chemie, Universität Regensburg, 93040, Regensburg, Germany
| | - Stefan Pelties
- Institut für Anorganische Chemie, Universität Regensburg, 93040, Regensburg, Germany
| | - Robert Wolf
- Institut für Anorganische Chemie, Universität Regensburg, 93040, Regensburg, Germany
| | - Daniel M Pividori
- Institut für Anorganische Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058, Erlangen, Germany
| | - Karsten Meyer
- Institut für Anorganische Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058, Erlangen, Germany
| | - Nicolaas P van Leest
- Van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam (The, Netherlands
| | - Bas de Bruin
- Van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam (The, Netherlands
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3
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Till M, Kelly JA, Ziegler CGP, Wolf R, Guo T, Ringenberg MR, Lutsker E, Reiser O. Synthesis and Characterization of Bidentate Isonitrile Iron Complexes. Organometallics 2021; 40:1042-1052. [PMID: 34054182 PMCID: PMC8155556 DOI: 10.1021/acs.organomet.1c00042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Indexed: 12/30/2022]
Abstract
The divalent iron complexes trans-[FeBr2(BINC)2], [Cp*FeCl(BINC)] (Cp* = Me5C5), and [FeBr2(CNAr3NC)2] with the chelating bis(isonitrile) ligands BINC (bis(2-isocyanophenyl)phenylphosphonate) and CNAr3NC (2,2″-diisocyano-3,5,3″,5"tetramethyl-1,1':3',1″-terphenyl) have been prepared and characterized. Their subsequent reduction yields the di- and trinuclear compounds [Fe3(BINC)6], [Cp*Fe(BINC)]2, [Fe(CNAr3NC)2]2, and [K(Et2O)]2[Fe(CNAr3NC)2]2. The molecular structures of all new species were determined by X-ray crystallography and compared to those of related iron carbonyl complexes, demonstrating that the bidentate isonitrile ligands are capable surrogates for two CO ligands with only minimal distortion of the tetrahedral or octahedral geometry of the parent complexes. The complexes were further characterized by NMR and IR spectroscopy, and the electrochemical properties of selected compounds were analyzed by UV-vis-NIR spectroelectrochemistry.
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Affiliation(s)
- Marion Till
- Institute of Inorganic Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - John A Kelly
- Institute of Inorganic Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - Christoph G P Ziegler
- Institute of Inorganic Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - Robert Wolf
- Institute of Inorganic Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - Tianao Guo
- Institute of Inorganic Chemistry, University of Stuttgart, 70569 Stuttgart, Germany
| | - Mark R Ringenberg
- Institute of Inorganic Chemistry, University of Stuttgart, 70569 Stuttgart, Germany
| | - Eugen Lutsker
- Institute of Organic Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - Oliver Reiser
- Institute of Organic Chemistry, University of Regensburg, 93040 Regensburg, Germany
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4
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Müller I, Munz D, Werncke CG. Reactions of Alkynes with Quasi-Linear 3d Metal(I) Silylamides of Chromium to Cobalt: A Comparative Study. Inorg Chem 2020; 59:9521-9537. [DOI: 10.1021/acs.inorgchem.0c00365] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Igor Müller
- Department of Chemistry, Philipps-University Marburg, Hans-Meerwein-Straße 4, 35043 Marburg, Germany
| | - Dominik Munz
- Inorganic Chemistry: Coordination Chemistry, Saarland University, 66123 Saarbrücken Germany
- Inorganic and General Chemistry, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - C. Gunnar Werncke
- Department of Chemistry, Philipps-University Marburg, Hans-Meerwein-Straße 4, 35043 Marburg, Germany
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5
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Sandl S, Maier TM, van Leest NP, Kröncke S, Chakraborty U, Demeshko S, Koszinowski K, de Bruin B, Meyer F, Bodensteiner M, Herrmann C, Wolf R, Jacobi von Wangelin A. Cobalt-Catalyzed Hydrogenations via Olefin Cobaltate and Hydride Intermediates. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01584] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sebastian Sandl
- Department of Chemistry, University of Hamburg, Martin Luther King Pl 6, 20146 Hamburg, Germany
| | - Thomas M. Maier
- Institute of Inorganic Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - Nicolaas P. van Leest
- van’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Susanne Kröncke
- Department of Chemistry, University of Hamburg, Martin Luther King Pl 6, 20146 Hamburg, Germany
| | - Uttam Chakraborty
- Department of Chemistry, University of Hamburg, Martin Luther King Pl 6, 20146 Hamburg, Germany
| | - Serhiy Demeshko
- Institute of Inorganic Chemistry, Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany
| | - Konrad Koszinowski
- Institute of Organic and Biomolecular Chemistry, Universität Göttingen, Tammannstrasse 2, 37077 Göttingen, Germany
| | - Bas de Bruin
- van’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Franc Meyer
- Institute of Inorganic Chemistry, Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany
| | - Michael Bodensteiner
- Institute of Inorganic Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - Carmen Herrmann
- Department of Chemistry, University of Hamburg, Martin Luther King Pl 6, 20146 Hamburg, Germany
| | - Robert Wolf
- Institute of Inorganic Chemistry, University of Regensburg, 93040 Regensburg, Germany
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6
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Moore JT, Chatterjee S, Tarrago M, Clouston LJ, Sproules S, Bill E, Bernales V, Gagliardi L, Ye S, Lancaster KM, Lu CC. Enhanced Fe-Centered Redox Flexibility in Fe-Ti Heterobimetallic Complexes. Inorg Chem 2019; 58:6199-6214. [PMID: 30957996 PMCID: PMC6727590 DOI: 10.1021/acs.inorgchem.9b00442] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
![]()
Previously, we reported the synthesis
of Ti[N(o-(NCH2P(iPr)2)C6H4)3] and
the Fe–Ti complex, FeTi[N(o-(NCH2P(iPr)2)C6H4)3], abbreviated as TiL (1), and FeTiL
(2), respectively. Herein, we describe the synthesis
and characterization of the complete redox families of the monometallic
Ti and Fe–Ti compounds. Cyclic voltammetry studies on FeTiL
reveal both reduction and oxidation processes at −2.16 and
−1.36 V (versus Fc/Fc+), respectively. Two isostructural
redox members, [FeTiL]+ and [FeTiL]− (2ox and 2red, respectively)
were synthesized and characterized, along with BrFeTiL (2-Br) and the monometallic [TiL]+ complex (1ox). The solid-state structures of the [FeTiL]+/0/– series feature short metal–metal bonds, ranging from 1.94–2.38
Å, which are all shorter than the sum of the Ti and Fe single-bond
metallic radii (cf. 2.49 Å). To elucidate the bonding and electronic
structures, the complexes were characterized with a host of spectroscopic
methods, including NMR, EPR, and 57Fe Mössbauer,
as well as Ti and Fe K-edge X-ray absorption spectroscopy (XAS). These
studies, along with hybrid density functional theory (DFT) and time-dependent
DFT calculations, suggest that the redox processes in the isostructural
[FeTiL]+,0,– series are primarily Fe-based and that
the polarized Fe–Ti π-bonds play a role in delocalizing
some of the additional electron density from Fe to Ti (net 13%). An isostructural redox series of Fe≡Ti complexes was investigated
using a combination of spectroscopic methods and density functional
theory to elucidate their electronic structures and to understand
their polarized metal−metal bonding. Overall, the results support
that the redox changes occur primarily at the Fe site though some
electron density is delocalized to Ti. Hence, the Ti plays an important
role in enhancing the redox flexibility of the single Fe site.
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Affiliation(s)
- James T Moore
- Department of Chemistry , University of Minnesota , 207 Pleasant Street SE , Minneapolis , Minnesota 55455-0431 , United States
| | - Sudipta Chatterjee
- Department of Chemistry and Chemical Biology, Baker Laboratory , Cornell University , Ithaca New York 14853 , United States
| | - Maxime Tarrago
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1 , 45470 Mülheim an der Ruhr , Germany
| | - Laura J Clouston
- Department of Chemistry , University of Minnesota , 207 Pleasant Street SE , Minneapolis , Minnesota 55455-0431 , United States
| | - Stephen Sproules
- WestCHEM, School of Chemistry , University of Glasgow , Glasgow G12 8QQ , United Kingdom
| | - Eckhard Bill
- Max-Planck-Institut für Chemische Energiekonversion , Stiftstraße 34-36 , 45470 Mülheim an der Ruhr , Germany
| | - Varinia Bernales
- Department of Chemistry , University of Minnesota , 207 Pleasant Street SE , Minneapolis , Minnesota 55455-0431 , United States
| | - Laura Gagliardi
- Department of Chemistry , University of Minnesota , 207 Pleasant Street SE , Minneapolis , Minnesota 55455-0431 , United States
| | - Shengfa Ye
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1 , 45470 Mülheim an der Ruhr , Germany
| | - Kyle M Lancaster
- Department of Chemistry and Chemical Biology, Baker Laboratory , Cornell University , Ithaca New York 14853 , United States
| | - Connie C Lu
- Department of Chemistry , University of Minnesota , 207 Pleasant Street SE , Minneapolis , Minnesota 55455-0431 , United States
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7
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Preuß A, Korb M, Miesel D, Rüffer T, Hildebrandt A, Lang H. Ferrocenyl naphthalenes: substituent- and substitution pattern-depending charge transfer studies. Dalton Trans 2019; 48:14418-14432. [DOI: 10.1039/c9dt03216a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The synthesis and characterisation of a series of ferrocenyl-functionalized naphthalenes is reported, whereby the electrochemical behaviour and charge transfer properties depend on the substitution pattern.
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Affiliation(s)
- Andrea Preuß
- Technische Universität Chemnitz
- Faculty of Natural Sciences
- Institute of Chemistry
- Inorganic Chemistry
- 09107 Chemnitz
| | - Marcus Korb
- Technische Universität Chemnitz
- Faculty of Natural Sciences
- Institute of Chemistry
- Inorganic Chemistry
- 09107 Chemnitz
| | - Dominique Miesel
- Technische Universität Chemnitz
- Faculty of Natural Sciences
- Institute of Chemistry
- Inorganic Chemistry
- 09107 Chemnitz
| | - Tobias Rüffer
- Technische Universität Chemnitz
- Faculty of Natural Sciences
- Institute of Chemistry
- Inorganic Chemistry
- 09107 Chemnitz
| | - Alexander Hildebrandt
- Technische Universität Chemnitz
- Faculty of Natural Sciences
- Institute of Chemistry
- Inorganic Chemistry
- 09107 Chemnitz
| | - Heinrich Lang
- Technische Universität Chemnitz
- Faculty of Natural Sciences
- Institute of Chemistry
- Inorganic Chemistry
- 09107 Chemnitz
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8
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Herrmann D, Rödl C, de Bruin B, Hartl F, Wolf R. Synthesis, electronic structure and redox properties of the diruthenium sandwich complexes [Cp*Ru(μ-C10H8)RuCp*]x (x = 0, 1+; Cp* = C5Me5; C10H8 = naphthalene). Dalton Trans 2018; 47:11058-11069. [DOI: 10.1039/c8dt02003e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Strong electronic coupling was observed between the metal centers in a naphthalene-bridged diruthenium complex.
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Affiliation(s)
- Dirk Herrmann
- University of Regensburg
- Institute of Inorganic Chemistry
- 93040 Regensburg
- Germany
| | - Christian Rödl
- University of Regensburg
- Institute of Inorganic Chemistry
- 93040 Regensburg
- Germany
| | - Bas de Bruin
- University of Amsterdam
- Van ‘t Hoff Institute for Molecular Sciences
- Homogeneous and Supramolecular Catalysis
- 1098 XH Amsterdam
- The Netherlands
| | | | - Robert Wolf
- University of Regensburg
- Institute of Inorganic Chemistry
- 93040 Regensburg
- Germany
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9
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Groß OA, Lauk S, Müller C, Gidt W, Sun Y, Demeshko S, Meyer F, Sitzmann H. Iron(II) High‐Spin and Low‐Spin Complexes from Pentaisopropylcyclopentadienyliron(II) Bis(trimethylsilyl)amide. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700236] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Oliver A. Groß
- FB Chemie TU Kaiserslautern Erwin‐Schrödinger‐Strasse 54 67663 Kaiserslautern Germany
| | - Sergej Lauk
- FB Chemie TU Kaiserslautern Erwin‐Schrödinger‐Strasse 54 67663 Kaiserslautern Germany
| | - Carsten Müller
- FB Chemie TU Kaiserslautern Erwin‐Schrödinger‐Strasse 54 67663 Kaiserslautern Germany
| | - Wjatscheslaw Gidt
- FB Chemie TU Kaiserslautern Erwin‐Schrödinger‐Strasse 54 67663 Kaiserslautern Germany
| | - Yu Sun
- FB Chemie TU Kaiserslautern Erwin‐Schrödinger‐Strasse 54 67663 Kaiserslautern Germany
| | - Serhiy Demeshko
- Institut für Anorganische Chemie Universität Göttingen Tammannstrasse 4 37077 Göttingen Germany
| | - Franc Meyer
- Institut für Anorganische Chemie Universität Göttingen Tammannstrasse 4 37077 Göttingen Germany
| | - Helmut Sitzmann
- FB Chemie TU Kaiserslautern Erwin‐Schrödinger‐Strasse 54 67663 Kaiserslautern Germany
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10
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Büschelberger P, Gärtner D, Reyes‐Rodriguez E, Kreyenschmidt F, Koszinowski K, Jacobi von Wangelin A, Wolf R. Alkene Metalates as Hydrogenation Catalysts. Chemistry 2017; 23:3139-3151. [PMID: 28026060 PMCID: PMC5861671 DOI: 10.1002/chem.201605222] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Indexed: 11/09/2022]
Abstract
First-row transition-metal complexes hold great potential as catalysts for hydrogenations and related reductive reactions. Homo- and heteroleptic arene/alkene metalates(1-) (M=Co, Fe) are a structurally distinct catalyst class with good activities in hydrogenations of alkenes and alkynes. The first syntheses of the heteroleptic cobaltates [K([18]crown-6)][Co(η4 -cod)(η2 -styrene)2 ] (5) and [K([18]crown-6)][Co(η4 -dct)(η4 -cod)] (6), and the homoleptic complex [K(thf)2 ][Co(η4 -dct)2 ] (7; dct=dibenzo[a,e]cyclooctatetraene, cod=1,5-cyclooctadiene), are reported. For comparison, two cyclopentadienylferrates(1-) were synthesized according to literature procedures. The isolated and fully characterized monoanionic complexes were competent precatalysts in alkene hydrogenations under mild conditions (2 bar H2 , r.t., THF). Mechanistic studies by NMR spectroscopy, ESI mass spectrometry, and poisoning experiments documented the operation of a homogeneous mechanism, which was initiated by facile redox-neutral π-ligand exchange with the substrates followed by H2 activation. The substrate scope of the investigated precatalysts was also extended to polar substrates (ketones and imines).
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Affiliation(s)
- Philipp Büschelberger
- Institute of Inorganic ChemistryUniversity of RegensburgUniversitätsstr. 3193040RegensburgGermany
| | - Dominik Gärtner
- Institute of Organic ChemistryUniversity of Regensburg93040RegensburgGermany
| | | | - Friedrich Kreyenschmidt
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität GöttingenTammannstr. 237077GöttingenGermany
| | - Konrad Koszinowski
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität GöttingenTammannstr. 237077GöttingenGermany
| | | | - Robert Wolf
- Institute of Inorganic ChemistryUniversity of RegensburgUniversitätsstr. 3193040RegensburgGermany
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11
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Paul D, Beiring B, Plois M, Ortega N, Kock S, Schlüns D, Neugebauer J, Wolf R, Glorius F. A Cyclometalated Ruthenium-NHC Precatalyst for the Asymmetric Hydrogenation of (Hetero)arenes and Its Activation Pathway. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00702] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Daniel Paul
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität
Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Bernhard Beiring
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität
Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Markus Plois
- University of Regensburg, Institute of Inorganic Chemistry, Universitätsstrasse 31, D-93053 Regensburg, Germany
| | - Nuria Ortega
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität
Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Slawomir Kock
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität
Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Danny Schlüns
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität
Münster, Corrensstrasse 40, D-48149 Münster, Germany
- Center for Multiscale Theory and Computation, Westfälische
Wilhelms-Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Johannes Neugebauer
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität
Münster, Corrensstrasse 40, D-48149 Münster, Germany
- Center for Multiscale Theory and Computation, Westfälische
Wilhelms-Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Robert Wolf
- University of Regensburg, Institute of Inorganic Chemistry, Universitätsstrasse 31, D-93053 Regensburg, Germany
| | - Frank Glorius
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität
Münster, Corrensstrasse 40, D-48149 Münster, Germany
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12
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Kaim W. Electron Transfer Reactivity of Organometallic Compounds Involving Radical-Forming Noninnocent Ligands. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES INDIA SECTION A-PHYSICAL SCIENCES 2016. [DOI: 10.1007/s40010-016-0304-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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Chakraborty U, Modl M, Mühldorf B, Bodensteiner M, Demeshko S, van Velzen NJC, Scheer M, Harder S, Wolf R. Pentaarylcyclopentadienyl Iron, Cobalt, and Nickel Halides. Inorg Chem 2016; 55:3065-74. [PMID: 26950693 DOI: 10.1021/acs.inorgchem.5b02896] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The preparation of new stable half-sandwich transition metal complexes, having a bulky cyclopentadienyl ligand C5(C6H4-4-Et)5 (Cp(Ar1)) or C5(C6H4-4-nBu)5 (Cp(Ar2)), is reported. The tetrahydrofuran (THF) adduct [Cp(Ar1)Fe(μ-Br)(THF)]2 (1a) was synthesized by reacting K[Cp(Ar1)] with [FeBr2(THF)2] in THF, and its molecular structure was determined by X-ray crystallography. Complex 1a easily loses its coordinated THF molecules under vacuum to form the solvent-free complex [Cp(Ar1)Fe(μ-Br)]2 (1b). The analogous complexes [Cp(Ar1)Co(μ-Br)]2 (2), [Cp(Ar1)Ni(μ-Br)]2 (3), and [Cp(Ar2)Ni(μ-Br)]2 (4) were synthesized from CoBr2 and [NiBr2(1,2-dimethoxyethane)]. The mononuclear, low-spin cobalt(III) and nickel(III) complexes [Cp(Ar2)MI2] (5, M = Co; 6, M = Ni) were prepared by reacting the radical Cp(Ar2) with NiI2 and CoI2. The complexes were characterized by NMR and UV-vis spectroscopies and by elemental analyses. Single-crystal X-ray structure analyses revealed that the dimeric complexes 1a, 1b, and 3 have a planar M2Br2 core, whereas 2 and 4 feature a puckered M2Br2 ring.
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Affiliation(s)
- Uttam Chakraborty
- Institute of Inorganic Chemistry, University of Regensburg , D-93040 Regensburg, Germany
| | - Moritz Modl
- Institute of Inorganic Chemistry, University of Regensburg , D-93040 Regensburg, Germany
| | - Bernd Mühldorf
- Institute of Inorganic Chemistry, University of Regensburg , D-93040 Regensburg, Germany
| | - Michael Bodensteiner
- Institute of Inorganic Chemistry, University of Regensburg , D-93040 Regensburg, Germany
| | - Serhiy Demeshko
- Institute of Inorganic Chemistry, University of Göttingen , D-37077 Göttingen, Germany
| | - Niels J C van Velzen
- Stratingh Institute for Chemistry , Nijenborgh 4, 9747 AG Groningen, Netherlands
| | - Manfred Scheer
- Institute of Inorganic Chemistry, University of Regensburg , D-93040 Regensburg, Germany
| | - Sjoerd Harder
- Stratingh Institute for Chemistry , Nijenborgh 4, 9747 AG Groningen, Netherlands.,Inorganic and Organometallic Chemistry, Friedrich Alexander University Erlangen-Nürnberg , D-91058 Erlangen, Germany
| | - Robert Wolf
- Institute of Inorganic Chemistry, University of Regensburg , D-93040 Regensburg, Germany
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14
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Wiegel AK, Rad BR, Herrmann D, Wolf R. Synthesis and Characterization of Tetra(pyridyl)cyclobutadiene Iron Complexes [Cp*Fe(C 4py 4)] -(py = 3-pyridyl and 4-pyridyl, Cp* = C 5Me 5). Z Anorg Allg Chem 2015. [DOI: 10.1002/zaac.201500235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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15
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Wang X, Zhao Y, Gong S, Liu B, Li QS, Su JH, Wu B, Yang XJ. Mono- and Dinuclear Heteroleptic Cobalt Complexes with α-Diimine and Polyarene Ligands. Chemistry 2015; 21:13302-10. [DOI: 10.1002/chem.201500983] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Revised: 06/24/2015] [Indexed: 11/08/2022]
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16
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Beck R, Camadanli S, Flörke U, Klein HF. Reactivity Diversification - Synthesis and Exchange Reactions of Cobalt and Iron 2-Alkenylpyridine/-pyrazine Complexes Obtained by Vinylic C(sp2)-H Activation. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500225] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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17
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Beck R, Camadanli S, Flörke U, Klein HF. Reaction cascade: Ortho-C–H activation and C–C coupling of benzophenone leading to tetranuclear organoiron and mononuclear organocobalt complexes. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2014.12.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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18
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Rezaei Rad B, Chakraborty U, Mühldorf B, Sklorz JAW, Bodensteiner M, Müller C, Wolf R. Synthesis, Structure, and Reactivity of Pentamethylcyclopentadienyl 2,4,6-Triphenylphosphinine Iron Complexes. Organometallics 2015. [DOI: 10.1021/om501161y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Babak Rezaei Rad
- Institute
of Inorganic Chemistry, University of Regensburg, D-93040 Regensburg, Germany
| | - Uttam Chakraborty
- Institute
of Inorganic Chemistry, University of Regensburg, D-93040 Regensburg, Germany
| | - Bernd Mühldorf
- Institute
of Inorganic Chemistry, University of Regensburg, D-93040 Regensburg, Germany
| | - Julian A. W. Sklorz
- Institut
für Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34/36, D-14195 Berlin, Germany
| | - Michael Bodensteiner
- Institute
of Inorganic Chemistry, University of Regensburg, D-93040 Regensburg, Germany
| | - Christian Müller
- Institut
für Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34/36, D-14195 Berlin, Germany
| | - Robert Wolf
- Institute
of Inorganic Chemistry, University of Regensburg, D-93040 Regensburg, Germany
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19
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Mukhopadhyay TK, Flores M, Feller RK, Scott BL, Taylor RD, Paz-Pasternak M, Henson NJ, Rein FN, Smythe NC, Trovitch RJ, Gordon JC. A New Spin on Cyclooctatetraene (COT) Redox Activity: Low-Spin Iron(I) Complexes That Exhibit Antiferromagnetic Coupling to a Singly Reduced η4-COT Ligand. Organometallics 2014. [DOI: 10.1021/om500909h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Tufan K. Mukhopadhyay
- Department of Chemistry & Biochemistry, Arizona State University, Tempe, Arizona 85287, United States
| | - Marco Flores
- Department of Chemistry & Biochemistry, Arizona State University, Tempe, Arizona 85287, United States
| | - Russell K. Feller
- Materials
Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Brian L. Scott
- Materials
Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - R. Dean Taylor
- Materials
Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Moshe Paz-Pasternak
- School
of Physics and Astronomy, Tel Aviv University, 69978 Tel Aviv, Israel
| | - Neil J. Henson
- Theoretical
Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Francisca N. Rein
- Chemistry
Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Nathan C. Smythe
- Chemistry
Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Ryan J. Trovitch
- Department of Chemistry & Biochemistry, Arizona State University, Tempe, Arizona 85287, United States
| | - John C. Gordon
- Chemistry
Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
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20
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Brennessel WW, Ellis JE. Crystal structure of [(1,2,3,4,11,12-η)-anthracene]tris-(tri-methyl-stann-yl)cobalt(III). Acta Crystallogr Sect E Struct Rep Online 2014; 70:312-5. [PMID: 25484731 PMCID: PMC4257331 DOI: 10.1107/s1600536814021709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Accepted: 10/01/2014] [Indexed: 11/21/2022]
Abstract
The first reported structure of a cobalt complex containing an η6-anthracene ligand is presented. The anthracene ligand is nearly flat and coordinates the metal asymmetrically, such that the ring junction carbon atoms are slightly further from the cobalt center than are the other four. The asymmetric unit of the title structure, [Co(η6-C14H10){Sn(CH3)3}3], contains two independent molecules. Each anthracene ligand is η6-coordinating to a CoIII cation and is nearly planar [fold angles of 5.4 (3) and 9.7 (3)°], as would be expected for its behaving almost entirely as a donor to a high-oxidation-state metal center. The slight fold in each anthracene ligand gives rise to slightly longer Co—C bond lengths to the ring junction carbon atoms than to the other four. Each CoIII cation is further coordinated by three Sn(CH3)3 ligands, giving each molecule a three-legged piano-stool geometry. In each of the two independent molecules, the trio of SnMe3 ligands are modeled as disordered over two positions, rotated by approximately 30%, such that the C atoms nearly overlap. In one molecule, the disorder ratio refined to 0.9365 (8):0.0635 (8), while that for the other refined to 0.9686 (8):0.0314 (8). The molecules are well separated, and thus no significant intermolecular interactions are observed. The compound is of interest as the first structure report of an η6-anthracene cobalt(III) complex.
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Affiliation(s)
- William W Brennessel
- Department of Chemistry, 120 Trustee Road, University of Rochester, Rochester, NY 14627, USA
| | - John E Ellis
- Department of Chemistry, 207 Pleasant Street SE, University of Minnesota, Minneapolis, MN 55455, USA
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21
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Rezaei Rad B, Herrmann D, Lescop C, Wolf R. A tetradentate metalloligand: synthesis and coordination behaviour of a 2-pyridyl-substituted cyclobutadiene iron complex. Dalton Trans 2014; 43:4247-50. [DOI: 10.1039/c3dt52699b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A novel cyclobutadiene iron complex with four 2-pyridyl-substitutents acts as a bis(bidentate) chelate ligand toward Zn2+ cations.
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Affiliation(s)
- Babak Rezaei Rad
- University of Regensburg
- Institute of Inorganic Chemistry
- 93040 Regensburg, Germany
| | - Dirk Herrmann
- University of Regensburg
- Institute of Inorganic Chemistry
- 93040 Regensburg, Germany
| | - Christophe Lescop
- Sciences Chimiques de Rennes UMR 6226 CNRS
- Université de Rennes 1 Campus de Beaulieu
- 35042 Rennes Cedex, France
| | - Robert Wolf
- University of Regensburg
- Institute of Inorganic Chemistry
- 93040 Regensburg, Germany
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22
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Blom B, Tan G, Enthaler S, Inoue S, Epping JD, Driess M. Bis-N-heterocyclic carbene (NHC) stabilized η6-arene iron(0) complexes: synthesis, structure, reactivity, and catalytic activity. J Am Chem Soc 2013; 135:18108-20. [PMID: 24195449 DOI: 10.1021/ja410234x] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Reaction of FeCl2 with the chelating bis-N-heterocyclic carbene (NHC) bis-(N-Dipp-imidazole-2-ylidene)methylene (abbreviated {((Dipp)C:)2CH2}) (Dipp = 2,6-di-isopropylphenyl) affords the complex [FeCl2{((Dipp)C:)2CH2}] (1) in high yield. Reduction of complex 1 with excess KC8 with a 10-fold molar excess of PMe3 affords the Fe(II) complex [FeH{((Dipp)C:)2CH2}(PMe3)(η(2)-PMe2CH2)] (2) as a mixture of three stereoisomers. Complex 2, the first example of any iron(II) complex bearing mutually an NHC and PMe3 ligand, is likely obtained from the in situ, reductively generated 16 VE Fe(0) complex, [Fe{((Dipp)C:)2CH2}(PMe3)2] (2'), following intramolecular C-H activation of one of the phosphorus-bound CH3 groups. Complex 2 is unstable in aromatic solvents and forms, via a novel synthetic transformation involving intramolecular reductive elimination and concomitant PMe3 elimination, the Fe (0) arene complex [Fe{((Dipp)C:)2CH2}(η(6)-C6D6)] (4-d6) in C6D6. Complex 4-d6 represents the first example of an NHC stabilized iron (0) arene complex. The transformation from 2 to 4-d6 can be accelerated at higher temperature and at 60 °C forms immediately. Alternatively, the reduction of 1 in the presence of toluene or benzene affords the complexes [Fe{((Dipp)C:)2CH2}(η(6)-C7H8)] (3) and [Fe{((Dipp)C:)2CH2}(η(6)-C6H6)] (4), selectively and in good yields. DFT calculations characterizing the bonding situation in 3 and 4 reveal similar energies of the HOMO and LUMO orbitals, with the LUMO orbital of both complexes located on the Dipp rings of the bis-NHC. The HOMO orbital reflects a π-back-bonding interaction between the Fe(0) center and the chelating NHC ligand, while the HOMO-1 is associated with the arene interaction with the Fe(0) site. The calculations do not suggest any noninnocence of the coordinated arene in either complex. Moreover, the (57)Fe Mössbauer spectrum of 4 at 80K exhibits parameters (δ = 0.43 mm·s(-1); ΔEQ = 1.37 mm·s(-1)) which are consistent with a five-coordinate Fe(0) system, rendering 3 and 4 the first examples of well-defined authentic Fe(0)-η(6)-arene complexes of the type [Fe(η(6)-arene)L2] (L = η(1 or 2) neutral ligand, mono or bidentate). Some reactivitiy studies of 3 are also reported: The reaction of 3 with excess CO selectively yields the five-coordinate piano-stool complex [Fe{((Dipp)C:)2CH2}(CO)3] (6) in near quantitative yields, while the reaction of complex 3 with C6D6 under heating affords by toluene elimination 4-d6. The catalytic ability of 4 was also investigated with respect to amide reduction to amines, for a variety of substrates using Ph2SiH2 as a hydride source. In all cases good to excellent yields to the corresponding amines were obtained. The use of 4 as a precatalyst represents the first example of a well-defined Fe(0) complex to effect this catalytic process.
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Affiliation(s)
- Burgert Blom
- Department of Chemistry: Metalorganics and Inorganic Materials, Technische Universität Berlin , Strasse des 17. Juni 135, Sekr. C2, D-10623 Berlin, Germany
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23
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Pelties S, Wolf R. Iron(II), Cobalt(II), and Nickel(II) Complexes of a Cyclic (Alkyl)(amino)carbene. Z Anorg Allg Chem 2013. [DOI: 10.1002/zaac.201300395] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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24
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Malberg J, Lupton E, Schnöckelborg EM, de Bruin B, Sutter J, Meyer K, Hartl F, Wolf R. Synthesis and Electronic Structure of Dissymmetrical, Naphthalene-Bridged Sandwich Complexes [Cp′Fe(μ-C10H8)MCp*]x (x = 0, +1; M = Fe, Ru; Cp′ = η5-C5H2-1,2,4-tBu3; Cp* = η5-C5Me5). Organometallics 2013. [DOI: 10.1021/om4005862] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Jennifer Malberg
- Institute of Inorganic Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - Elizabeth Lupton
- Institute of Physical and Theoretical Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | | | - Bas de Bruin
- Homogeneous and Supramolecular
Catalysis, Van
‘t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Jörg Sutter
- Department of Chemistry and Pharmacy, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
| | - Karsten Meyer
- Department of Chemistry and Pharmacy, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
| | - František Hartl
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, United Kingdom
| | - Robert Wolf
- Institute of Inorganic Chemistry, University of Regensburg, 93040 Regensburg, Germany
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25
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Rudd PA, Planas N, Bill E, Gagliardi L, Lu CC. Dinitrogen Activation at Iron and Cobalt Metallalumatranes. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300272] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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26
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Henne FD, Schnöckelborg EM, Feldmann KO, Grunenberg J, Wolf R, Weigand JJ. Observation of a Chloride-Bridged P–P Bond in the Phosphorus Cation [L(Cl)P(μ-Cl)P(Cl)L]+ (L = NHC). Organometallics 2013. [DOI: 10.1021/om4002268] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Florian D. Henne
- TU Dresden, Department of Chemistry and
Food Chemistry, 01062 Dresden, Germany
| | | | - Kai-Oliver Feldmann
- TU Dresden, Department of Chemistry and
Food Chemistry, 01062 Dresden, Germany
| | - Jörg Grunenberg
- TU Braunschweig, Institute of Organic Chemistry, Hagenring
30, 38106 Braunschweig, Germany
| | - Robert Wolf
- University of Regensburg, Institute of Inorganic Chemistry, 93040 Regensburg, Germany
| | - Jan J. Weigand
- TU Dresden, Department of Chemistry and
Food Chemistry, 01062 Dresden, Germany
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27
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Gärtner D, Konnerth H, von Wangelin AJ. Highly practical iron-catalyzed C–O cleavage reactions. Catal Sci Technol 2013. [DOI: 10.1039/c3cy00266g] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Brennessel WW, Ellis JE. (18-Crown-6)potassium [(1,2,5,6-η)-cyclo-octa-1,5-diene][(1,2,3,4-η)-naph-tha-lene]-ferrate(-I). Acta Crystallogr Sect E Struct Rep Online 2012; 68:m1230-m1231. [PMID: 23125569 PMCID: PMC3470125 DOI: 10.1107/s160053681203704x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Accepted: 08/27/2012] [Indexed: 06/01/2023]
Abstract
The title salt, [K(C(12)H(24)O(6))][Fe(C(8)H(12))(C(10)H(8))], is the only known naphthalene complex containing iron in a formally negative oxidation state. Each (naphthalene)(1,5-cod)ferrate(-I) anion is in contact with one (18-crown-6)potassium cation via K⋯C contacts to the outer four carbon atoms of the naphthalene ligand (cod = 1,5-cyclo-octa-diene, 18-crown-6 = 1,4,7,10,13,16-hexa-oxacyclo-octa-deca-ne). When using the midpoints of the coordinating olefin bonds, the overall geometry of the coordination sphere around iron can be best described as distorted tetra-hedral. The naphthalene fold angle between the plane of the iron-coordinating butadiene unit and the plane containing the exo-benzene moiety is 19.2 (1)°.
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Affiliation(s)
- William W. Brennessel
- Department of Chemistry, 207 Pleasant Street SE, University of Minnesota, Minneapolis, MN 55455, USA
| | - John E. Ellis
- Department of Chemistry, 207 Pleasant Street SE, University of Minnesota, Minneapolis, MN 55455, USA
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