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Hashikawa Y, Kawasaki H, Murata Y. π-Backbonding on Group 9 Metal Complexes Bearing an η2-(H2O@C60) Ligand. Organometallics 2022. [DOI: 10.1021/acs.organomet.1c00706] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yoshifumi Hashikawa
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Hiroto Kawasaki
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Yasujiro Murata
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
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2
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Hashikawa Y, Murata Y. Synthesis and Oligomerization of CpM(CO) 2. ACS OMEGA 2021; 6:34137-34141. [PMID: 34926961 PMCID: PMC8675160 DOI: 10.1021/acsomega.1c05739] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 11/16/2021] [Indexed: 06/14/2023]
Abstract
We showcase efficient synthetic protocols of cyclopentadienyl metal dicarbonyl, CpM(CO)2 (M = Rh and Ir). Reflecting the relativistic effect, the 1H and 13C signals of the Cp ring in CpIr(CO)2 were upfield shifted when compared with the Rh analogue. A missing dinuclear complex, (CpIr)2(μ-CO)(CO)2, was spontaneously generated together with [CpIr(CO)]3 by the loss of CO. The crystallographic analyses unambiguously determined their unique structures with one and three Ir-Ir bonds, respectively.
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Gläsel T, Baumann BN, Hapke M. Cobalt Catalysts for [2+2+2] Cycloaddition Reactions: Isolated Precatalysts and in situ Generated Catalysts. CHEM REC 2021; 21:3727-3745. [PMID: 34859570 DOI: 10.1002/tcr.202100273] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/04/2021] [Accepted: 11/04/2021] [Indexed: 11/09/2022]
Abstract
[2+2+2] Cycloaddition reactions belong to the not even large class of reactions, which can be catalyzed or mediated by a significant number of different transition metals. Cobalt complexes belong to the catalysts that paved the way for the extensive use and profound mechanistic knowledge on this particular transformation. Beside the established role, cyclopentadienyl (Cp) cobalt complexes inherit in synthetic applications of the cyclotrimerization reaction, modification of the precatalysts opened up novel reactivities and versatility for such catalytic initiators. At the same time the development of in situ generated cobalt catalysts allowed the conversion of novel substrates as well as novel reaction modes to be realized. In this personal account recent developments will be presented and the possibilities of catalysts containing cobalt atoms in different oxidation states be discussed.
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Affiliation(s)
- Tim Gläsel
- Institute for Catalysis (INCA), Johannes Kepler University Linz, Altenberger Strasse 69, 4040, Linz, Austria
| | - Benedikt N Baumann
- Institute for Catalysis (INCA), Johannes Kepler University Linz, Altenberger Strasse 69, 4040, Linz, Austria
| | - Marko Hapke
- Institute for Catalysis (INCA), Johannes Kepler University Linz, Altenberger Strasse 69, 4040, Linz, Austria.,Research Group Catalytic Cycloadditions, Leibniz Institute for Catalysis Rostock (LIKAT), Albert-Einstein-Strasse 29a, 18059, Rostock, Germany
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4
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Wu F, Deraedt C, Cornaton Y, Ruhlmann L, Karmazin L, Bailly C, Kyritsakas N, Le Breton N, Choua S, Djukic JP. Fate of Cobaltacycles in Cp*Co-Mediated C–H Bond Functionalization Catalysis: Cobaltacycles May Collapse upon Oxidation via Co(IV) Species. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Fule Wu
- Laboratoire de Chimie et Systémique Organométalliques, Institut de Chimie de Strasbourg (UMR 7177) CNRS/Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Christophe Deraedt
- Laboratoire de Chimie et Systémique Organométalliques, Institut de Chimie de Strasbourg (UMR 7177) CNRS/Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Yann Cornaton
- Laboratoire de Chimie et Systémique Organométalliques, Institut de Chimie de Strasbourg (UMR 7177) CNRS/Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Laurent Ruhlmann
- Laboratoire d’Electrochimie et Chimie Physique du Corps Solide, Institut de Chimie de Strasbourg (UMR 7177) CNRS/Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Lydia Karmazin
- Service de Radiocristallographie Fédération de Chimie Le Bel−FR2010 BP 296R8, 1 rue Blaise Pascal, F-67008 Strasbourg Cedex, France
| | - Corinne Bailly
- Service de Radiocristallographie Fédération de Chimie Le Bel−FR2010 BP 296R8, 1 rue Blaise Pascal, F-67008 Strasbourg Cedex, France
| | - Nathalie Kyritsakas
- Service de Radiocristallographie Fédération de Chimie Le Bel−FR2010 BP 296R8, 1 rue Blaise Pascal, F-67008 Strasbourg Cedex, France
| | - Nolwenn Le Breton
- Laboratoire Propriétés Optiques et Magnétiques des Architectures Moléculaires, Institut de Chimie de Strasbourg (UMR 7177) CNRS/Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Sylvie Choua
- Laboratoire Propriétés Optiques et Magnétiques des Architectures Moléculaires, Institut de Chimie de Strasbourg (UMR 7177) CNRS/Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Jean-Pierre Djukic
- Laboratoire de Chimie et Systémique Organométalliques, Institut de Chimie de Strasbourg (UMR 7177) CNRS/Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
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Fischer F, Pientka T, Jiao H, Spannenberg A, Hapke M. CpCo( i) precatalysts for [2 + 2 + 2] cycloaddition reactions: synthesis and reactivity. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00876a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthesis of CpCo complexes containing olefins and phosphite/phosphoramidite ligands give access to a reactive class of precatalysts for cyclotrimerisation reactions.
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Affiliation(s)
- Fabian Fischer
- Leibniz-Institut für Katalyse e.V. (LIKAT Rostock)
- D-18059 Rostock
- Germany
| | - Tobias Pientka
- Leibniz-Institut für Katalyse e.V. (LIKAT Rostock)
- D-18059 Rostock
- Germany
| | - Haijun Jiao
- Leibniz-Institut für Katalyse e.V. (LIKAT Rostock)
- D-18059 Rostock
- Germany
| | - Anke Spannenberg
- Leibniz-Institut für Katalyse e.V. (LIKAT Rostock)
- D-18059 Rostock
- Germany
| | - Marko Hapke
- Leibniz-Institut für Katalyse e.V. (LIKAT Rostock)
- D-18059 Rostock
- Germany
- Johannes Kepler Universität Linz, Institut für Katalyse (INCA)
- A-4040 Linz
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Wu W, Solis-Ibarra D, Walker KL, Waymouth RM. Synthesis, Characterization, and Reactivity of Hydroxycyclopentadienyl Cobalt Complexes. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00486] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Weiwei Wu
- Department of Chemistry, Stanford University, Stanford, California 94306, United States
| | - Diego Solis-Ibarra
- Department of Chemistry, Stanford University, Stanford, California 94306, United States
| | - Katherine L. Walker
- Department of Chemistry, Stanford University, Stanford, California 94306, United States
| | - Robert M. Waymouth
- Department of Chemistry, Stanford University, Stanford, California 94306, United States
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Andjaba JM, Tye JW, Yu P, Pappas I, Bradley CA. Cp*Co(IPr): synthesis and reactivity of an unsaturated Co(i) complex. Chem Commun (Camb) 2016; 52:2469-72. [DOI: 10.1039/c5cc06756a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Coordinatively unsaturated Cp*Co(IPr) (2) has been isolated and displays reactivity consistent with a Cp*CoL fragment, undergoing ligand addition/NHC displacement and oxidative addition of dihydrogen.
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Affiliation(s)
- John M. Andjaba
- Department of Science
- Mount St. Mary's University
- Emmitsburg
- USA
| | - Jesse W. Tye
- Department of Chemistry
- Ball State University
- Muncie
- USA
| | - Pony Yu
- Department of Chemistry
- Princeton University
- Princeton
- USA
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9
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Jungk P, Fischer F, Thiel I, Hapke M. CoCl(PPh3)3 as Cyclotrimerization Catalyst for Functionalized Triynes under Mild Conditions. J Org Chem 2015; 80:9781-93. [DOI: 10.1021/acs.joc.5b01623] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Phillip Jungk
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock (LIKAT), Albert-Einstein-Str. 29a, D-18059 Rostock, Germany
| | - Fabian Fischer
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock (LIKAT), Albert-Einstein-Str. 29a, D-18059 Rostock, Germany
| | - Indre Thiel
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock (LIKAT), Albert-Einstein-Str. 29a, D-18059 Rostock, Germany
| | - Marko Hapke
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock (LIKAT), Albert-Einstein-Str. 29a, D-18059 Rostock, Germany
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