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Puig E, Verron R, Kechaou-Perrot M, Vendier L, Gornitzka H, Miqueu K, Sotiropoulos JM, Fischmeister C, Sutra P, Igau A. Shvo-Type Metal–Ligand Cooperative Catalysts: Tethered η 5-Oxocyclohexadienyl Ruthenium Complexes. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Emmanuel Puig
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, BP 44099, Toulouse Cedex 4 F-31077, France
- Université de Toulouse, UPS, INPT, Toulouse Cedex 4 F-31077, France
| | - Raphaël Verron
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)─UMR 6226, Rennes F-35042, France
| | - Manel Kechaou-Perrot
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, BP 44099, Toulouse Cedex 4 F-31077, France
- Université de Toulouse, UPS, INPT, Toulouse Cedex 4 F-31077, France
| | - Laure Vendier
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, BP 44099, Toulouse Cedex 4 F-31077, France
- Université de Toulouse, UPS, INPT, Toulouse Cedex 4 F-31077, France
| | - Heinz Gornitzka
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, BP 44099, Toulouse Cedex 4 F-31077, France
- Université de Toulouse, UPS, INPT, Toulouse Cedex 4 F-31077, France
| | - Karinne Miqueu
- CNRS/Université de Pau & des Pays de l’Adour, E2S-UPPA, Institut des Sciences Analytiques et de Physico-Chimie pour l’Environnement et les Matériaux (IPREM), UMR CNRS 5254, 2 Avenue du Président P. Angot, Pau 64053, Cedex 09, France
| | - Jean-Marc Sotiropoulos
- CNRS/Université de Pau & des Pays de l’Adour, E2S-UPPA, Institut des Sciences Analytiques et de Physico-Chimie pour l’Environnement et les Matériaux (IPREM), UMR CNRS 5254, 2 Avenue du Président P. Angot, Pau 64053, Cedex 09, France
| | - Cédric Fischmeister
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)─UMR 6226, Rennes F-35042, France
| | - Pierre Sutra
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, BP 44099, Toulouse Cedex 4 F-31077, France
- Université de Toulouse, UPS, INPT, Toulouse Cedex 4 F-31077, France
| | - Alain Igau
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, BP 44099, Toulouse Cedex 4 F-31077, France
- Université de Toulouse, UPS, INPT, Toulouse Cedex 4 F-31077, France
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2
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Roach TV, Schmitz ML, Leach VA, Miller MD, Chan BC, Kalman SE. Nickel complexes of primary amido-functionalized N-heterocyclic carbene ligands: Synthesis, characterization, and base-free transfer hydrogenation. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.07.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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3
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Hermans C, Rong W, Spaniol TP, Okuda J. Lanthanum complexes containing a bis(phenolate) ligand with a ferrocene-1,1'-diyldithio backbone: synthesis, characterization, and ring-opening polymerization of rac-lactide. Dalton Trans 2018; 45:8127-33. [PMID: 27088967 DOI: 10.1039/c6dt00272b] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Lanthanum complexes [(L)LaX] (X = N(SiMe3)2, O(i)Pr , BH4) supported by a ferrocene-based (OSSO)-type ligand LH2 were synthesized and characterized by elemental analysis, NMR spectroscopy and cyclic voltammetry. The structure of was confirmed by single crystal X-ray diffraction. These complexes were highly active initiators for the ring-opening polymerization of rac-lactide (rac-LA). The activity depended on the initiating group in the order of ≈ > . The activities of and during polymerization were controlled in situ with external redox reagents by reversibly switching the oxidation state of the iron center.
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Affiliation(s)
- Catherine Hermans
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, D-52056 Aachen, Germany.
| | - Weifeng Rong
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, D-52056 Aachen, Germany.
| | - Thomas P Spaniol
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, D-52056 Aachen, Germany.
| | - Jun Okuda
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, D-52056 Aachen, Germany.
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4
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Menges FS, Lang J, Nosenko Y, Kerner C, Gaffga M, Ghoochany LT, Thiel WR, Riehn C, Niedner-Schatteburg G. Exploring the Gas-Phase Activation and Reactivity of a Ruthenium Transfer Hydrogenation Catalyst by Experiment and Theory in Concert. J Phys Chem A 2017; 121:4422-4434. [PMID: 28509543 DOI: 10.1021/acs.jpca.7b02459] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This study elucidates structures, activation barriers, and the gas-phase reactivity of cationic ruthenium transfer hydrogenation catalysts of the structural type [(η6-cym)RuX(pympyr)]+. In these complexes, the central ruthenium(+II) ion is coordinated to an η6-bound p-cymene (η6-cym), a bidentate 2-R-4-(2-pyridinyl)pyrimidine ligand (pympyr) with R = NH2 or N(CH3)2, and an anion X = I-, Br-, Cl-, or CF3SO3-. We present infrared multiple-photon dissociation (IR-MPD) spectra of precursors (before HCl loss) and of activated complexes (after HCl loss), which elucidates C-H activation as the key step in the activation mechanism. A resonant two-color IR-MPD scheme serves to record several otherwise "dark" bands and enhances the validity of spectral assignments. We show that collision-induced dissociation (CID)-derived activation energies of the [(η6-cym)RuX(pympyr)]+ (R = N(CH3)2) complexes depend crucially on the anion X. The obtained activation energies for the HX loss correlate well with quantum chemical activation barriers and are in line with the HSAB concept. We further elucidate the reaction of the activated complexes with D2 under single-collision conditions. Quantum mechanical simulations substantiate that the resulting species represent analogues for hydrido intermediates formed after abstraction of H+ and H- from isopropanol, as postulated for the catalytic cycle of transfer hydrogenation by us before.
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Affiliation(s)
- Fabian S Menges
- Department of Chemistry, Yale University , New Haven, Connecticut 06520, United States
| | - Johannes Lang
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Yevgeniy Nosenko
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Christian Kerner
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Maximilian Gaffga
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Leila Taghizadeh Ghoochany
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Werner R Thiel
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Christoph Riehn
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Gereon Niedner-Schatteburg
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
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5
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Sepúlveda F, Carrión MC, Phillips AD, Jalón FA, Dyson PJ, Manzano BR. Base-Free Transfer Hydrogenation with an Ionic-Liquid-Supported Ruthenium η6-Arene Bis(pyrazolyl)methane Catalyst. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201601207] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Francisco Sepúlveda
- Departamento de Química Inorgánica; Orgánica y Bioquímica; Universidad de Castilla-La Mancha; Facultad de Ciencias y Tecnologías Químicas-IRICA; Avda. C. J. Cela, 10 13071 Ciudad Real Spain
- Institut des Sciences et Ingénierie Chimiques; École Polytechnique Fédérale de Lausanne (EPFL); 1015 Lausanne Switzerland
| | - M. Carmen Carrión
- Departamento de Química Inorgánica; Orgánica y Bioquímica; Universidad de Castilla-La Mancha; Facultad de Ciencias y Tecnologías Químicas-IRICA; Avda. C. J. Cela, 10 13071 Ciudad Real Spain
- Fundación Parque Científico y Tecnológico de Castilla-La Mancha (Fundación PCTCLM); Bulevar Río Alberche s/n 45007 Toledo Spain
| | - Andrew D. Phillips
- School of Chemistry; University College Dublin; D4 Belfield Ireland
- Institut des Sciences et Ingénierie Chimiques; École Polytechnique Fédérale de Lausanne (EPFL); 1015 Lausanne Switzerland
| | - Félix A. Jalón
- Departamento de Química Inorgánica; Orgánica y Bioquímica; Universidad de Castilla-La Mancha; Facultad de Ciencias y Tecnologías Químicas-IRICA; Avda. C. J. Cela, 10 13071 Ciudad Real Spain
| | - Paul J. Dyson
- Institut des Sciences et Ingénierie Chimiques; École Polytechnique Fédérale de Lausanne (EPFL); 1015 Lausanne Switzerland
| | - Blanca R. Manzano
- Departamento de Química Inorgánica; Orgánica y Bioquímica; Universidad de Castilla-La Mancha; Facultad de Ciencias y Tecnologías Químicas-IRICA; Avda. C. J. Cela, 10 13071 Ciudad Real Spain
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6
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Kerner C, Lang J, Gaffga M, Menges FS, Sun Y, Niedner-Schatteburg G, Thiel WR. Mechanistic Studies on Ruthenium(II)-Catalyzed Base-Free Transfer Hydrogenation Triggered by Roll-Over Cyclometalation. Chempluschem 2016; 82:212-224. [PMID: 31961548 DOI: 10.1002/cplu.201600526] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Indexed: 11/07/2022]
Abstract
The synthesis of 2-substituted pyridine-pyrimidine ligands and their complexation with arene ruthenium(II) chloride moieties is reported. Depending on the electronic and steric influences of the ligand, the catalysts undergo CH activation by roll-over cyclometalation. This process opens up the route to the catalytic transfer hydrogenation of ketones with isopropanol as the hydrogen source under base-free and mild conditions. Barriers related to the roll-over cyclometalation process can be determined experimentally by collision-induced dissociation ESI mass spectrometry. They are supported by DFT calculations and allow the classification of the ligands according to their electronic and steric properties, which is also in accordance with critical bond parameters derived from X-ray structure data. DFT calculations furthermore reveal that the formation of a ruthenium(II) hydrido species is plausible through β-hydride elimination from isopropanol.
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Affiliation(s)
- Christian Kerner
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany
| | - Johannes Lang
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany.,Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany
| | - Maximilian Gaffga
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany.,Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany
| | - Fabian S Menges
- Department of Chemistry, Yale University, 225 Prospect St., New Haven, CT, 06511, USA
| | - Yu Sun
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany
| | - Gereon Niedner-Schatteburg
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany.,Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany
| | - Werner R Thiel
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany
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7
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Sommer MG, Marinova S, Krafft MJ, Urankar D, Schweinfurth D, Bubrin M, Košmrlj J, Sarkar B. Ruthenium Azocarboxamide Half-Sandwich Complexes: Influence of the Coordination Mode on the Electronic Structure and Activity in Base-Free Transfer Hydrogenation Catalysis. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00424] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Michael G. Sommer
- Institut
für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, D-14195 Berlin, Germany
- Institut
für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70569 Stuttgart, Germany
| | - Sofiya Marinova
- Institut
für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, D-14195 Berlin, Germany
| | - Michael J. Krafft
- Institut
für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70569 Stuttgart, Germany
| | - Damijana Urankar
- Faculty
of Chemistry and Chemical Technology, University of Ljubljana, Večna
pot 113, SI-1000, Ljubljana, Slovenia
| | - David Schweinfurth
- Institut
für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, D-14195 Berlin, Germany
- Institut
für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70569 Stuttgart, Germany
| | - Martina Bubrin
- Institut
für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70569 Stuttgart, Germany
| | - Janez Košmrlj
- Faculty
of Chemistry and Chemical Technology, University of Ljubljana, Večna
pot 113, SI-1000, Ljubljana, Slovenia
| | - Biprajit Sarkar
- Institut
für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, D-14195 Berlin, Germany
- Institut
für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70569 Stuttgart, Germany
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8
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Huang W, Diaconescu PL. Reactivity and Properties of Metal Complexes Enabled by Flexible and Redox-Active Ligands with a Ferrocene Backbone. Inorg Chem 2016; 55:10013-10023. [DOI: 10.1021/acs.inorgchem.6b01118] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Wenliang Huang
- Department of Chemistry and
Biochemistry, University of California, Los Angeles, 607 Charles
E Young Drive East, Los Angeles, California 90095, United States
| | - Paula L. Diaconescu
- Department of Chemistry and
Biochemistry, University of California, Los Angeles, 607 Charles
E Young Drive East, Los Angeles, California 90095, United States
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9
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Allouch F, Dwadnia N, Vologdin NV, Svyaschenko YV, Cattey H, Penouilh MJ, Roger J, Naoufal D, Ben Salem R, Pirio N, Hierso JC. Converging and Diverging Synthetic Strategies to Tetradentate (N,N′)-Diaminomethyl,(P,P′)-Ferrocenyl Ligands: Influence of tert-Butyl Groups on Ferrocene Backbone Conformation. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00601] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Fatima Allouch
- Institut
de Chimie
Moléculaire de l’Université de Bourgogne, ICMUB UMR 6302 CNRS, Université de Bourgogne Franche-Comté, 9 Avenue Alain Savary, 21078 Dijon, France
| | - Nejib Dwadnia
- Institut
de Chimie
Moléculaire de l’Université de Bourgogne, ICMUB UMR 6302 CNRS, Université de Bourgogne Franche-Comté, 9 Avenue Alain Savary, 21078 Dijon, France
| | - Nikolay V. Vologdin
- Institut
de Chimie
Moléculaire de l’Université de Bourgogne, ICMUB UMR 6302 CNRS, Université de Bourgogne Franche-Comté, 9 Avenue Alain Savary, 21078 Dijon, France
| | - Yurii V. Svyaschenko
- Institut
de Chimie
Moléculaire de l’Université de Bourgogne, ICMUB UMR 6302 CNRS, Université de Bourgogne Franche-Comté, 9 Avenue Alain Savary, 21078 Dijon, France
| | - Hélène Cattey
- Institut
de Chimie
Moléculaire de l’Université de Bourgogne, ICMUB UMR 6302 CNRS, Université de Bourgogne Franche-Comté, 9 Avenue Alain Savary, 21078 Dijon, France
| | - Marie-José Penouilh
- Institut
de Chimie
Moléculaire de l’Université de Bourgogne, ICMUB UMR 6302 CNRS, Université de Bourgogne Franche-Comté, 9 Avenue Alain Savary, 21078 Dijon, France
| | - Julien Roger
- Institut
de Chimie
Moléculaire de l’Université de Bourgogne, ICMUB UMR 6302 CNRS, Université de Bourgogne Franche-Comté, 9 Avenue Alain Savary, 21078 Dijon, France
| | - Daoud Naoufal
- Laboratoire
de Chimie de Coordination Inorganique et Organométallique,
Faculté des Sciences, Université Libanaise, Beyrouth−Hadath, Lebanon
| | - Ridha Ben Salem
- Laboratoire
de Chimie Organique Physique UR11ES74, Faculté des Sciences, Université de Sfax, 3038 Sfax, Tunisia
| | - Nadine Pirio
- Institut
de Chimie
Moléculaire de l’Université de Bourgogne, ICMUB UMR 6302 CNRS, Université de Bourgogne Franche-Comté, 9 Avenue Alain Savary, 21078 Dijon, France
| | - Jean-Cyrille Hierso
- Institut
de Chimie
Moléculaire de l’Université de Bourgogne, ICMUB UMR 6302 CNRS, Université de Bourgogne Franche-Comté, 9 Avenue Alain Savary, 21078 Dijon, France
- Institut Universitaire de France (IUF), 103 Boulevard Saint-Michel, 75005 Paris, France
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10
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CH Bond Activation of Hydrocarbons Mediated by Rare-Earth Metals and Actinides. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2015. [DOI: 10.1016/bs.adomc.2015.08.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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11
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Duhović S, Oria JV, Odoh SO, Schreckenbach G, Batista ER, Diaconescu PL. Investigation of the Electronic Structure of Mono(1,1′-Diamidoferrocene) Uranium(IV) Complexes. Organometallics 2013. [DOI: 10.1021/om400521k] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Selma Duhović
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Jeremy V. Oria
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Samuel O. Odoh
- Department
of Chemistry, University of Manitoba, Winnipeg, MB, Canada R3T 2N2
| | - Georg Schreckenbach
- Department
of Chemistry, University of Manitoba, Winnipeg, MB, Canada R3T 2N2
| | - Enrique R. Batista
- Los Alamos National Laboratory, Los
Alamos, New Mexico 87545, United States
| | - Paula L. Diaconescu
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
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12
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Green AG, Kiesz MD, Oria JV, Elliott AG, Buechler AK, Hohenberger J, Meyer K, Zink JI, Diaconescu PL. Characterization of an Iron–Ruthenium Interaction in a Ferrocene Diamide Complex. Inorg Chem 2013; 52:5603-10. [DOI: 10.1021/ic400773s] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Aaron G. Green
- Department of Chemistry & Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Matthew D. Kiesz
- Department of Chemistry & Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Jeremy V. Oria
- Department of Chemistry & Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Andrew G. Elliott
- Department of Chemistry & Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Andrew K. Buechler
- Department of Chemistry & Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Johannes Hohenberger
- Department of Chemistry and
Pharmacy, Friedrich-Alexander-University Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Karsten Meyer
- Department of Chemistry and
Pharmacy, Friedrich-Alexander-University Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Jeffrey I. Zink
- Department of Chemistry & Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Paula L. Diaconescu
- Department of Chemistry & Biochemistry, University of California, Los Angeles, California 90095, United States
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13
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Kumar M, DePasquale J, White NJ, Zeller M, Papish ET. Ruthenium Complexes of Triazole-Based Scorpionate Ligands Transfer Hydrogen to Substrates under Base-Free Conditions. Organometallics 2013. [DOI: 10.1021/om301260j] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Mukesh Kumar
- Department of Chemistry, Drexel University, 3141 Chestnut Street,
Philadelphia, Pennsylvania 19104, United States
| | - Joseph DePasquale
- Department of Chemistry, Drexel University, 3141 Chestnut Street,
Philadelphia, Pennsylvania 19104, United States
| | - Nicholas J. White
- Department of Chemistry, Drexel University, 3141 Chestnut Street,
Philadelphia, Pennsylvania 19104, United States
| | - Matthias Zeller
- Department
of Chemistry, Youngstown State University, 1 University Plaza, Youngstown, Ohio 44555, United States
| | - Elizabeth T. Papish
- Department of Chemistry, Drexel University, 3141 Chestnut Street,
Philadelphia, Pennsylvania 19104, United States
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14
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Dub PA, Ikariya T. Quantum chemical calculations with the inclusion of nonspecific and specific solvation: asymmetric transfer hydrogenation with bifunctional ruthenium catalysts. J Am Chem Soc 2013; 135:2604-19. [PMID: 23336817 DOI: 10.1021/ja3097674] [Citation(s) in RCA: 128] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Details of the mechanism of asymmetric transfer hydrogenation of ketones catalyzed by two chiral bifunctional ruthenium complexes, (S)-RuH[(R,R)-OCH(Ph)CH(Ph)NH(2)](η(6)-benzene) (Ru-1) or (S)-RuH[(R,R)-p-TsNCH(Ph)CH(Ph)NH(2)](η(6)-mesitylene) (Ru-2), were studied computationally by density functional theory, accounting for the solvation effects by using continuum, discrete, and mixed continuum/discrete solvation models via "solvated supermolecules" approach. In contrast to gas phase quantum chemical calculations, where the reactions were found to proceed via a concerted three-bond asynchronous process through a six-membered pericyclic transition state, incorporation of the implicit and/or explicit solvation into the calculations suggests that the same reactions proceed via two steps in solution: (i) enantio-determining hydride transfer and (ii) proton transfer through the contact ion-pair intermediate, stabilized primarily by ionic hydrogen bonding between the cation and the anion. The calculations suggest that the proton source for neutralizing the chiral RO(-) anion may be either the amine group of the cationic Ru complex or, more likely, a protic solvent molecule. In the latter case, the reaction may not necessarily proceed via the 16e amido complex Ru[(R,R)-XCH(Ph)CH(Ph)NH](η(6)-arene). The origin of enantioselectivity is discussed in terms of the newly formulated mechanism.
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Affiliation(s)
- Pavel A Dub
- Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, Tokyo 152-8552, Japan
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