1
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Both NF, Spannenberg A, Jiao H, Junge K, Beller M. Bis(N-Heterocyclic Carbene) Manganese(I) Complexes: Efficient and Simple Hydrogenation Catalysts. Angew Chem Int Ed Engl 2023; 62:e202307987. [PMID: 37395302 DOI: 10.1002/anie.202307987] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 06/29/2023] [Accepted: 06/30/2023] [Indexed: 07/04/2023]
Abstract
The use of bis(NHC) manganese(I) complexes 3 as catalysts for the hydrogenation of esters was investigated. For that purpose, a series of complexes has been synthesized via an improved two step procedure utilizing bis(NHC)-BEt3 adducts. By applying complexes 3 with KHBEt3 as additive, various aromatic and aliphatic esters were hydrogenated successfully at mild temperatures and low catalyst loadings, highlighting the efficiency of the novel catalytic system. The versatility of the developed catalytic system was further demonstrated by the hydrogenation of other substrate classes like ketones, nitriles, N-heteroarenes and alkenes. Mechanistic experiments and DFT calculations indicate an inner sphere mechanism with the loss of one CO ligand and reveal the role of BEt3 as cocatalyst.
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Affiliation(s)
- Niklas F Both
- Leibniz-Institut für Katalyse e.V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Anke Spannenberg
- Leibniz-Institut für Katalyse e.V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Haijun Jiao
- Leibniz-Institut für Katalyse e.V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Kathrin Junge
- Leibniz-Institut für Katalyse e.V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Matthias Beller
- Leibniz-Institut für Katalyse e.V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
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2
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Head M, Joseph BT, Keith JM, Chianese AR. The Mechanism of Markovnikov-Selective Epoxide Hydrogenolysis Catalyzed by Ruthenium PNN and PNP Pincer Complexes. Organometallics 2023; 42:347-356. [PMID: 36937786 PMCID: PMC10015984 DOI: 10.1021/acs.organomet.2c00503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Indexed: 03/02/2023]
Abstract
The homogeneous catalysis of epoxide hydrogenolysis to give alcohols has recently received significant attention. Catalyst systems have been developed for the selective formation of either the Markovnikov (branched) or anti-Markovnikov (linear) alcohol product. Thus far, the reported catalysts exhibiting Markovnikov selectivity all feature the potential for Noyori/Shvo-type bifunctional catalysis, with either a RuH/NH or FeH/OH core structure. The proposed mechanisms of epoxide ring-opening have involved cooperative C-O bond hydrogenolysis involving the metal hydride and the acidic pendant group on the ligand, in analogy to the well-documented mechanism of polar double-bond hydrogenation exhibited by catalysts of this type. In this work, we present a combined computational/experimental study of the mechanism of epoxide hydrogenolysis catalyzed by Noyori-type PNP and PNN complexes of ruthenium. We find that, at least for these ruthenium systems, the previously proposed bifunctional pathway for epoxide ring-opening is energetically inaccessible; instead, the ring-opening proceeds through opposite-side nucleophilic attack of the ruthenium hydride on the epoxide carbon, without the involvement of the ligand N-H group. For both catalyst systems, the rate law and overall barrier predicted by density functional theory (DFT) are consistent with the results from kinetic studies.
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3
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Ortega-Lepe I, Sánchez P, Santos LL, Lara P, Rendón N, López-Serrano J, Salazar-Pereda V, Álvarez E, Paneque M, Suárez A. Catalytic Nitrous Oxide Reduction with H 2 Mediated by Pincer Ir Complexes. Inorg Chem 2022; 61:18590-18600. [PMID: 36346983 PMCID: PMC10441893 DOI: 10.1021/acs.inorgchem.2c02963] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Indexed: 11/09/2022]
Abstract
Reduction of nitrous oxide (N2O) with H2 to N2 and water is an attractive process for the decomposition of this greenhouse gas to environmentally benign species. Herein, a series of iridium complexes based on proton-responsive pincer ligands (1-4) are shown to catalyze the hydrogenation of N2O under mild conditions (2 bar H2/N2O (1:1), 30 °C). Among the tested catalysts, the Ir complex 4, based on a lutidine-derived CNP pincer ligand having nonequivalent phosphine and N-heterocyclic carbene (NHC) side donors, gave rise to the highest catalytic activity (turnover frequency (TOF) = 11.9 h-1 at 30 °C, and 16.4 h-1 at 55 °C). Insights into the reaction mechanism with 4 have been obtained through NMR spectroscopy. Thus, reaction of 4 with N2O in tetrahydrofuran-d8 (THF-d8) initially produces deprotonated (at the NHC arm) species 5NHC, which readily reacts with H2 to regenerate the trihydride complex 4. However, prolonged exposure of 4 to N2O for 6 h yields the dinitrogen Ir(I) complex 7P, having a deprotonated (at the P-arm) pincer ligand. Complex 7P is a poor catalytic precursor in the N2O hydrogenation, pointing out to the formation of 7P as a catalyst deactivation pathway. Moreover, when the reaction of 4 with N2O is carried out in wet THF-d8, formation of a new species, which has been assigned to the hydroxo species 8, is observed. Finally, taking into account the experimental results, density functional theory (DFT) calculations were performed to get information on the catalytic cycle steps. Calculations are in agreement with 4 as the TOF-determining intermediate (TDI) and the transfer of an apical hydrido ligand to the terminal nitrogen atom of N2O as the TOF-determining transition state (TDTS), with very similar reaction rates for the mechanisms involving either the NHC- or the P-CH2 pincer methylene linkers.
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Affiliation(s)
- Isabel Ortega-Lepe
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Práxedes Sánchez
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Laura L. Santos
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Patricia Lara
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Nuria Rendón
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Joaquín López-Serrano
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Verónica Salazar-Pereda
- Área
Académica de Químicas, Universidad
Autónoma del Estado de Hidalgo, 42184 Mineral de la Reforma, Hidalgo, Mexico
| | - Eleuterio Álvarez
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Margarita Paneque
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Andrés Suárez
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
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4
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Brodie CN, Sotorrios L, Boyd TM, Macgregor SA, Weller AS. Dehydropolymerization of H 3B·NMeH 2 Mediated by Cationic Iridium(III) Precatalysts Bearing κ 3- iPr-PN RP Pincer Ligands ( R = H, Me): An Unexpected Inner-Sphere Mechanism. ACS Catal 2022; 12:13050-13064. [PMID: 36313521 PMCID: PMC9594342 DOI: 10.1021/acscatal.2c03778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 09/27/2022] [Indexed: 11/30/2022]
Abstract
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The dehydropolymerization of H3B·NMeH2 to form N-methylpolyaminoborane using neutral
and
cationic catalysts based on the {Ir(iPr-PNHP)} fragment [iPr-PNHP = κ3-(CH2CH2PiPr2)2NH] is reported. Neutral
Ir(iPr-PNHP)H3 or
Ir(iPr-PNHP)H2Cl
precatalysts show no, or poor and unselective, activity respectively
at 298 K in 1,2-F2C6H4 solution.
In contrast, addition of [NMeH3][BArF4] (ArF = 3,5-(CF3)2C6H3) to Ir(iPr-PNHP)H3 immediately starts catalysis, suggesting that a cationic
catalytic manifold operates. Consistent with this, independently synthesized
cationic precatalysts are active (tested between 0.5 and 2.0 mol %
loading) producing poly(N-methylaminoborane) with Mn ∼ 40,000 g/mol, Đ ∼1.5, i.e., dihydrogen/dihydride, [Ir(iPr-PNHP)(H)2(H2)][BArF4]; σ-amine-borane [Ir(iPr-PNHP)(H)2(H3B·NMe3)][BArF4]; and [Ir(iPr-PNHP)(H)2(NMeH2)][BArF4]. Density functional theory (DFT) calculations
probe hydride exchange processes in two of these complexes and also
show that the barrier to amine-borane dehydrogenation is lower (22.5
kcal/mol) for the cationic system compared with the neutral system
(24.3 kcal/mol). The calculations show that the dehydrogenation proceeds
via an inner-sphere process without metal–ligand cooperativity,
and this is supported experimentally by N–Me substituted [Ir(iPr-PNMeP)(H)2(H3B·NMe3)][BArF4] being
an active catalyst. Key to the lower barrier calculated for the cationic
system is the outer-sphere coordination of an additional H3B·NMeH2 with the N–H group of the ligand.
Experimentally, kinetic studies indicate a complex reaction manifold
that shows pronounced deceleratory temporal profiles. As supported
by speciation and DFT studies, a key observation is that deprotonation
of [Ir(iPr-NHP)(H)2(H2)][BArF4], formed upon amine-borane
dehydrogenation, by the slow in situ formation of NMeH2 (via B–N bond cleavage), results in the formation of essentially
inactive Ir(iPr-PNHP)H3, with a coproduct of [NMeH3]+/[H2B(NMeH2)2]+. While reprotonation
of Ir(iPr-PNHP)H3 results in a return to the cationic cycle, it is proposed, supported
by doping experiments, that reprotonation is attenuated by entrainment
of the [NMeH3]+/[H2B(NMeH2)2]+/catalyst in insoluble polyaminoborane.
The role of [NMeH3]+/[H2B(NMeH2)]+ as chain control agents is also noted.
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Affiliation(s)
| | - Lia Sotorrios
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K
| | - Timothy M. Boyd
- Department of Chemistry, University of York, York YO10 5DD, U.K
- Chemistry Research Laboratories, University of Oxford, Oxford OX1 3TA, U.K
| | - Stuart A. Macgregor
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K
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5
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Shi Y, Wang Y, Huang Z, Zhang F, Shao Y. t BuOLi-Promoted Hydroboration of Esters and Epoxides. ACS OMEGA 2022; 7:18876-18886. [PMID: 35694491 PMCID: PMC9178618 DOI: 10.1021/acsomega.2c01866] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 05/12/2022] [Indexed: 06/15/2023]
Abstract
Commercially available and inexpensive lithium tert-butoxide ( t BuOLi) acts as a good precatalyst for the hydroboration of esters, lactones, and epoxides using pinacolborane as a borylation agent. Functional groups such as cyano-, nitro-, amino-, vinyl, and alkynyl are unaffected under the presented hydroboration process, representing high chemoselectivity. This transformation has also been effectively applied to the synthesis of key intermediates of Erlotinib and Cinacalcet. Preliminary investigations of the mechanism show that the hydroboration proceeds through the in situ formed BH3 species.
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Affiliation(s)
- Yinyin Shi
- College
of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Yue Wang
- College
of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Zhefan Huang
- College
of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Fangjun Zhang
- School
of Pharmaceutical Sciences, Wenzhou Medical
University, Wenzhou 325035, China
| | - Yinlin Shao
- College
of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
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6
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Yang W, Kalavalapalli TY, Krieger AM, Khvorost TA, Chernyshov IY, Weber M, Uslamin EA, Pidko EA, Filonenko GA. Basic Promotors Impact Thermodynamics and Catalyst Speciation in Homogeneous Carbonyl Hydrogenation. J Am Chem Soc 2022; 144:8129-8137. [PMID: 35476423 PMCID: PMC9100671 DOI: 10.1021/jacs.2c00548] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
Homogeneously catalyzed
reactions often make use of additives and
promotors that affect reactivity patterns and improve catalytic performance.
While the role of reaction promotors is often discussed in view of
their chemical reactivity, we demonstrate that they can be involved
in catalysis indirectly. In particular, we demonstrate that promotors
can adjust the thermodynamics of key transformations in homogeneous
hydrogenation catalysis and enable reactions that would be unfavorable
otherwise. We identified this phenomenon in a set of well-established
and new Mn pincer catalysts that suffer from persistent product inhibition
in ester hydrogenation. Although alkoxide base additives do not directly
participate in inhibitory transformations, they can affect the equilibrium
constants of these processes. Experimentally, we confirm that by varying
the base promotor concentration one can control catalyst speciation
and inflict substantial changes to the standard free energies of the
key steps in the catalytic cycle. Despite the fact that the latter
are universally assumed to be constant, we demonstrate that reaction
thermodynamics and catalyst state are subject to external control.
These results suggest that reaction promotors can be viewed as an
integral component of the reaction medium, on its own capable of improving
the catalytic performance and reshaping the seemingly rigid thermodynamic
landscape of the catalytic transformation.
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Affiliation(s)
- Wenjun Yang
- Inorganic Systems Engineering Group, Department of Chemical Engineering, Faculty of Applied Sciences, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Tejas Y Kalavalapalli
- Inorganic Systems Engineering Group, Department of Chemical Engineering, Faculty of Applied Sciences, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Annika M Krieger
- Inorganic Systems Engineering Group, Department of Chemical Engineering, Faculty of Applied Sciences, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Taras A Khvorost
- TheoMAT Group, ChemBio Cluster, ITMO University, Lomonosova 9, St. Petersburg 191002, Russia
| | - Ivan Yu Chernyshov
- TheoMAT Group, ChemBio Cluster, ITMO University, Lomonosova 9, St. Petersburg 191002, Russia
| | - Manuela Weber
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstraße 34/36, Berlin D-14195, Germany
| | - Evgeny A Uslamin
- Inorganic Systems Engineering Group, Department of Chemical Engineering, Faculty of Applied Sciences, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Evgeny A Pidko
- Inorganic Systems Engineering Group, Department of Chemical Engineering, Faculty of Applied Sciences, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Georgy A Filonenko
- Inorganic Systems Engineering Group, Department of Chemical Engineering, Faculty of Applied Sciences, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
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7
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Kirlin FL, Borden OJ, Head MC, Kelly SE, Chianese AR. Epoxide Hydrogenolysis Catalyzed by Ruthenium PNN and PNP Pincer Complexes. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00068] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Fallyn L. Kirlin
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Olivia J. Borden
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Marianna C. Head
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Sophie E. Kelly
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Anthony R. Chianese
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
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8
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Curley JB, Townsend TM, Bernskoetter WH, Hazari N, Mercado BQ. Iron, Cobalt, and Nickel Complexes Supported by a iPrPNPhP Pincer Ligand. Organometallics 2022. [DOI: 10.1021/acs.organomet.1c00646] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Julia B. Curley
- The Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, United States
| | - Tanya M. Townsend
- The Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, United States
| | - Wesley H. Bernskoetter
- The Department of Chemistry, The University of Missouri, Columbia, Missouri 65211, United States
| | - Nilay Hazari
- The Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, United States
| | - Brandon Q. Mercado
- The Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, United States
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9
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Guo X, Unglaube F, Kragl U, Mejía E. B(C6F5)3-Catalyzed Transfer Hydrogenation of Esters and Organic Carbonates Towards Alcohols with Ammonia Borane. Chem Commun (Camb) 2022; 58:6144-6147. [DOI: 10.1039/d2cc01442d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we report an efficient metal-free system for the transfer hydrogenation of esters and carbonates by-passing the otherwise ubiquitous formation of transesterification side-products. The Lewis acid B(C6F5)3 is used as...
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10
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Babón JC, Esteruelas MA, López AM. Homogeneous catalysis with polyhydride complexes. Chem Soc Rev 2022; 51:9717-9758. [DOI: 10.1039/d2cs00399f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
This review analyzes the role of transition metal polyhydrides as homogeneous catalysts for organic reactions. Discussed reactions involve nearly every main organic functional group.
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Affiliation(s)
- Juan C. Babón
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Miguel A. Esteruelas
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Ana M. López
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
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11
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Curley JB, Hert C, Bernskoetter WH, Hazari N, Mercado BQ. Control of Catalyst Isomers Using an N-Phenyl-Substituted RN(CH 2CH 2P iPr 2) 2 Pincer Ligand in CO 2 Hydrogenation and Formic Acid Dehydrogenation. Inorg Chem 2021; 61:643-656. [PMID: 34955015 DOI: 10.1021/acs.inorgchem.1c03372] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A novel pincer ligand, iPrPNPhP [PhN(CH2CH2PiPr2)2], which is an analogue of the versatile MACHO ligand, iPrPNHP [HN(CH2CH2PiPr2)2], was synthesized and characterized. The ligand was coordinated to ruthenium, and a series of hydride-containing complexes were isolated and characterized by NMR and IR spectroscopies, as well as X-ray diffraction. Comparisons to previously published analogues ligated by iPrPNHP and iPrPNMeP [CH3N(CH2CH2PiPr2)2] illustrate that there are large changes in the coordination chemistry that occur when the nitrogen substituent of the pincer ligand is altered. For example, ruthenium hydrides supported by the iPrPNPhP ligand always form the syn isomer (where syn/anti refer to the relative orientation of the group on nitrogen and the hydride ligand on ruthenium), whereas complexes supported by iPrPNHP form the anti isomer and complexes supported by iPrPNMeP form a mixture of syn and anti isomers. We evaluated the impact of the nitrogen substituent of the pincer ligand in catalysis by comparing a series of iPrPNRP (R = H, Me, Ph)-ligated ruthenium hydride complexes as catalysts for formic acid dehydrogenation and carbon dioxide (CO2) hydrogenation to formate. The iPrPNPhP-ligated species is the most active for formic acid dehydrogenation, and mechanistic studies suggest that this is likely because there are kinetic advantages for catalysts that operate via the syn isomer. In CO2 hydrogenation, the iPrPNPhP-ligated species is again the most active under our optimal conditions, and we report some of the highest turnover frequencies for homogeneous catalysts. Experimental and theoretical insights into the turnover-limiting step of catalysis provide a basis for the observed trends in catalytic activity. Additionally, the stability of our complexes enabled us to detect a previously unobserved autocatalytic effect involving the base that is added to drive the reaction. Overall, by modifying the nitrogen substituent on the MACHO ligand, we have developed highly active catalysts for formic acid dehydrogenation and CO2 hydrogenation and also provided a framework for future catalyst development.
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Affiliation(s)
- Julia B Curley
- The Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, United States
| | - Clayton Hert
- The Department of Chemistry, The University of Missouri, Columbia, Missouri 65211, United States
| | - Wesley H Bernskoetter
- The Department of Chemistry, The University of Missouri, Columbia, Missouri 65211, United States
| | - Nilay Hazari
- The Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, United States
| | - Brandon Q Mercado
- The Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, United States
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12
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Homogeneous Catalyzed Valorization of Furanics: A Sustainable Bridge to Fuels and Chemicals. Catalysts 2021. [DOI: 10.3390/catal11111371] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The development of efficient biomass valorization is imperative for the future sustainable production of chemicals and fuels. Particularly, the last decade has witnessed the development of a plethora of effective and selective transformations of bio-based furanics using homogeneous organometallic catalysis under mild conditions. In this review, we describe some of the advances regarding the conversion of target furanics into value chemicals, monomers for high-performance polymers and materials, and pharmaceutical key intermediates using homogeneous catalysis. Finally, the incorporation of furanic skeletons into complex chemical architectures by multifunctionalization routes is also described.
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13
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Affiliation(s)
- Kazushi Mashima
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
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14
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Hydricity of 3d Transition Metal Complexes from Density Functional Theory: A Benchmarking Study. Molecules 2021; 26:molecules26134072. [PMID: 34279412 PMCID: PMC8271472 DOI: 10.3390/molecules26134072] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 06/29/2021] [Accepted: 06/30/2021] [Indexed: 11/17/2022] Open
Abstract
A range of modern density functional theory (DFT) functionals have been benchmarked against experimentally determined metal hydride bond strengths for three first-row TM hydride complexes. Geometries were found to be produced sufficiently accurately with RI-BP86-D3(PCM)/def2-SVP and further single-point calculations with PBE0-D3(PCM)/def2-TZVP were found to reproduce the experimental hydricity accurately, with a mean absolute deviation of 1.4 kcal/mol for the complexes studied.
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15
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Recent advances in the chemistry of group 9—Pincer organometallics. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2020. [DOI: 10.1016/bs.adomc.2019.09.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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16
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Hydrogenation Reactions Catalyzed by PNP-Type Complexes Featuring a HN(CH2CH2PR2)2 Ligand. TOP ORGANOMETAL CHEM 2020. [DOI: 10.1007/3418_2020_63] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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17
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Mohammadnezhad G, Abad S, Farrokhpour H. Theoretical Evaluation of One-Pot Synthesis of Aliphatic PNP Pincer Ligands. J STRUCT CHEM+ 2019. [DOI: 10.1134/s0022476619110052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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He T, Buttner JC, Reynolds EF, Pham J, Malek JC, Keith JM, Chianese AR. Dehydroalkylative Activation of CNN- and PNN-Pincer Ruthenium Catalysts for Ester Hydrogenation. J Am Chem Soc 2019; 141:17404-17413. [PMID: 31589441 DOI: 10.1021/jacs.9b09326] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Ruthenium-pincer complexes bearing CNN- and PNN-pincer ligands with diethyl- or diisopropylamino side groups, which have previously been reported to be active precatalysts for ester hydrogenation, undergo dehydroalkylation on heating in the presence of tricyclohexylphosphine to release ethane or propane, giving five-coordinate ruthenium(0) complexes containing a nascent imine functional group. Ethane or propane is also released under the conditions of catalytic ester hydrogenation, and time-course studies show that this release is concomitant with the onset of catalysis. A new PNN-pincer ruthenium(0)-imine complex is a highly active catalyst for ester hydrogenation at room temperature, giving up to 15 500 turnovers with no added base. This complex was shown to react reversibly at room temperature with two equivalents of hydrogen to give a ruthenium(II)-dihydride complex, where the imine functionality has been hydrogenated to give a protic amine side group. These observations have potentially broad implications for the identities of catalytic intermediates in ester hydrogenation and related transformations.
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Affiliation(s)
- Tianyi He
- Department of Chemistry , Colgate University , 13 Oak Drive , Hamilton , New York 13346 , United States
| | - John C Buttner
- Department of Chemistry , Colgate University , 13 Oak Drive , Hamilton , New York 13346 , United States
| | - Eamon F Reynolds
- Department of Chemistry , Colgate University , 13 Oak Drive , Hamilton , New York 13346 , United States
| | - John Pham
- Department of Chemistry , Colgate University , 13 Oak Drive , Hamilton , New York 13346 , United States
| | - Jack C Malek
- Department of Chemistry , Colgate University , 13 Oak Drive , Hamilton , New York 13346 , United States
| | - Jason M Keith
- Department of Chemistry , Colgate University , 13 Oak Drive , Hamilton , New York 13346 , United States
| | - Anthony R Chianese
- Department of Chemistry , Colgate University , 13 Oak Drive , Hamilton , New York 13346 , United States
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19
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Shao Z, Zhong R, Ferraccioli R, Li Y, Liu Q. General and Phosphine‐Free Cobalt‐Catalyzed Hydrogenation of Esters to Alcohols. CHINESE J CHEM 2019. [DOI: 10.1002/cjoc.201900292] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Zhihui Shao
- Center of Basic Molecular Science (CBMS), Department of ChemistryTsinghua University Beijing 100084 China
| | - Rui Zhong
- Center of Basic Molecular Science (CBMS), Department of ChemistryTsinghua University Beijing 100084 China
| | - Raffaella Ferraccioli
- CNR, Istituto di Scienze e Tecnologie Molecolari (ISTM) Via C. Golgi 19 20133 Milan Italy
| | - Yibiao Li
- School of Biotechnology and Health SciencesWuyi University Jiangmen Guangdong 529090 China
| | - Qiang Liu
- Center of Basic Molecular Science (CBMS), Department of ChemistryTsinghua University Beijing 100084 China
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20
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Le L, Liu J, He T, Malek JC, Cervarich TN, Buttner JC, Pham J, Keith JM, Chianese AR. Unexpected CNN-to-CC Ligand Rearrangement in Pincer–Ruthenium Precatalysts Leads to a Base-Free Catalyst for Ester Hydrogenation. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00373] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Linh Le
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Jiachen Liu
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Tianyi He
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Jack C. Malek
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Tia N. Cervarich
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - John C. Buttner
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - John Pham
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Jason M. Keith
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Anthony R. Chianese
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
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21
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Synthesis of 1,2-phenylenedimethanols by base-promoted reduction of isobenzofuran-1(3H)-ones with silane. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2018.11.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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22
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Bifunctional aliphatic PNP pincer catalysts for hydrogenation: Mechanisms and scope. ADVANCES IN INORGANIC CHEMISTRY 2019. [DOI: 10.1016/bs.adioch.2018.10.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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23
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Schneekönig J, Tannert B, Hornke H, Beller M, Junge K. Cobalt pincer complexes for catalytic reduction of nitriles to primary amines. Catal Sci Technol 2019. [DOI: 10.1039/c9cy00225a] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
An efficient cobalt pincer type complex catalyzes the hydrogenation of nitriles to amines under mild conditions with high yields.
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Affiliation(s)
- Jacob Schneekönig
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
| | - Bianca Tannert
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
| | - Helen Hornke
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
| | - Matthias Beller
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
| | - Kathrin Junge
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
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24
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Le L, Liu J, He T, Kim D, Lindley EJ, Cervarich TN, Malek JC, Pham J, Buck MR, Chianese AR. Structure–Function Relationship in Ester Hydrogenation Catalyzed by Ruthenium CNN-Pincer Complexes. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00470] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Linh Le
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Jiachen Liu
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Tianyi He
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Daniel Kim
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Eric J. Lindley
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Tia N. Cervarich
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Jack C. Malek
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - John Pham
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Matthew R. Buck
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Anthony R. Chianese
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
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25
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Yan X, Yang X. Mechanistic insights into the iridium catalysed hydrogenation of ethyl acetate to ethanol: a DFT study. Dalton Trans 2018; 47:10172-10178. [PMID: 30010677 DOI: 10.1039/c8dt02401d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Density functional theory study of the hydrogenation of ethyl acetate catalysed by iridium complexes [Cp*Ir(bpy)OH2]2+ reveals a direct C-O bond cleavage mechanism with two cascade catalytic cycles for the hydrogenation of ethyl acetate to aldehyde and the hydrogenation of aldehyde to ethanol. Calculation results indicate that the rate-determining state in the whole catalytic reaction is the direct C-O bond cleavage for the formation of aldehyde and ethanol with a total free energy barrier of 25.5 kcal mol-1, which is 0.6 kcal mol-1 more favorable than the mechanism proposed by Goldberg and co-workers in their experimental study.
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Affiliation(s)
- Xiuli Yan
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China.
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26
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Suárez A. Hydrogenation of carbonyl compounds of relevance to hydrogen storage in alcohols. PHYSICAL SCIENCES REVIEWS 2018. [DOI: 10.1515/psr-2017-0028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Abstract
Alcohols are a promising source for the sustainable production of hydrogen that may also serve as rechargeable liquid organic hydrogen carriers (LOHCs). Metal-catalyzed acceptorless dehydrogenation of alcohols produces carbonyl derivatives as H2-depleted by-products, which by means of a hydrogenation reaction can be reconverted to the initial alcohols. Hence, reversible H2-storage systems based on pairs of secondary alcohols/ketones and primary alcohols/carboxylic acid derivatives may be envisaged. In this contribution, the hydrogenation of carbonyl derivatives, including ketones, esters, amides and carboxylic acids, is reviewed from the perspective of the hydrogen storage in alcohols.
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27
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Valdés H, García-Eleno MA, Canseco-Gonzalez D, Morales-Morales D. Recent Advances in Catalysis with Transition-Metal Pincer Compounds. ChemCatChem 2018. [DOI: 10.1002/cctc.201702019] [Citation(s) in RCA: 146] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Hugo Valdés
- Instituto de Química; Universidad Nacional Autónoma de México; Circuito Exterior s/n, Ciudad Universitaria, Coyoacán 04510 Ciudad de México México
| | - Marco A. García-Eleno
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM; Universidad Autónoma del Estado de México; Carretera Toluca-Atlacomulco Km 14.5 Toluca, Estado de México 50200 México
| | - Daniel Canseco-Gonzalez
- CONACYT-Laboratorio Nacional de Investigación y Servicio, Agroalimentario y Forestal; Universidad Autónoma Chapingo; Texcoco de Mora México
| | - David Morales-Morales
- Instituto de Química; Universidad Nacional Autónoma de México; Circuito Exterior s/n, Ciudad Universitaria, Coyoacán 04510 Ciudad de México México
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28
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Wei Z, Junge K, Beller M, Jiao H. Exploring the activities of vanadium, niobium, and tantalum PNP pincer complexes in the hydrogenation of phenyl-substituted C N, C N, C C, C C, and C O functional groups. CR CHIM 2018. [DOI: 10.1016/j.crci.2017.09.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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29
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Wei Z, de Aguirre A, Junge K, Beller M, Jiao H. Exploring the mechanisms of aqueous methanol dehydrogenation catalyzed by defined PNP Mn and Re pincer complexes under base-free as well as strong base conditions. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00746b] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mechanisms of aqueous methanol dehydrogenation reaction catalyzed by defined Mn and Re pincer complexes under different conditions were computed.
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Affiliation(s)
- Zhihong Wei
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
| | - Adiran de Aguirre
- Institute of Chemical Research of Catalonia
- ICIQ
- The Barcelona Institute of Science and Technology
- Tarragona
- Spain
| | - Kathrin Junge
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
| | - Matthias Beller
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
| | - Haijun Jiao
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
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30
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Junge K, Wendt B, Cingolani A, Spannenberg A, Wei Z, Jiao H, Beller M. Cobalt Pincer Complexes for Catalytic Reduction of Carboxylic Acid Esters. Chemistry 2017; 24:1046-1052. [DOI: 10.1002/chem.201705201] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Indexed: 01/06/2023]
Affiliation(s)
- Kathrin Junge
- Leibniz-Institut für Katalyse e.V. an der; Universität Rostock; Albert-Einstein-Straße 29a Rostock 18059 Germany
| | - Bianca Wendt
- Leibniz-Institut für Katalyse e.V. an der; Universität Rostock; Albert-Einstein-Straße 29a Rostock 18059 Germany
| | - Andrea Cingolani
- Dipartiento di Chimica Industriale “Toso Montanari”; University of Bologna; viale Risorgimento 4 40136 Bologna Italy
| | - Anke Spannenberg
- Leibniz-Institut für Katalyse e.V. an der; Universität Rostock; Albert-Einstein-Straße 29a Rostock 18059 Germany
| | - Zhihong Wei
- Leibniz-Institut für Katalyse e.V. an der; Universität Rostock; Albert-Einstein-Straße 29a Rostock 18059 Germany
| | - Haijun Jiao
- Leibniz-Institut für Katalyse e.V. an der; Universität Rostock; Albert-Einstein-Straße 29a Rostock 18059 Germany
| | - Matthias Beller
- Leibniz-Institut für Katalyse e.V. an der; Universität Rostock; Albert-Einstein-Straße 29a Rostock 18059 Germany
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31
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van Putten R, Uslamin EA, Garbe M, Liu C, Gonzalez‐de‐Castro A, Lutz M, Junge K, Hensen EJM, Beller M, Lefort L, Pidko EA. Non-Pincer-Type Manganese Complexes as Efficient Catalysts for the Hydrogenation of Esters. Angew Chem Int Ed Engl 2017; 56:7531-7534. [PMID: 28429449 PMCID: PMC5485043 DOI: 10.1002/anie.201701365] [Citation(s) in RCA: 142] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Indexed: 12/27/2022]
Abstract
Catalytic hydrogenation of carboxylic acid esters is essential for the green production of pharmaceuticals, fragrances, and fine chemicals. Herein, we report the efficient hydrogenation of esters with manganese catalysts based on simple bidentate aminophosphine ligands. Monoligated Mn PN complexes are particularly active for the conversion of esters into the corresponding alcohols at Mn concentrations as low as 0.2 mol % in the presence of sub-stoichiometric amounts of KOt Bu base.
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Affiliation(s)
- Robbert van Putten
- Inorganic Materials Chemistry GroupDepartment of Chemical Engineering and ChemistryEindhoven University of TechnologyP.O. Box 5135600 MBEindhovenThe Netherlands
| | - Evgeny A. Uslamin
- Inorganic Materials Chemistry GroupDepartment of Chemical Engineering and ChemistryEindhoven University of TechnologyP.O. Box 5135600 MBEindhovenThe Netherlands
| | - Marcel Garbe
- Leibniz-Institut für Katalyse e.V. an der Universität RostockAlbert-Einstein Strasse 29a18059RostockGermany
| | - Chong Liu
- Inorganic Materials Chemistry GroupDepartment of Chemical Engineering and ChemistryEindhoven University of TechnologyP.O. Box 5135600 MBEindhovenThe Netherlands
| | | | - Martin Lutz
- Crystal and Structural ChemistryBijvoet Center for Biomolecular ResearchUtrecht UniversityPadualaan 83584 CHUtrechtThe Netherlands
| | - Kathrin Junge
- Leibniz-Institut für Katalyse e.V. an der Universität RostockAlbert-Einstein Strasse 29a18059RostockGermany
| | - Emiel J. M. Hensen
- Inorganic Materials Chemistry GroupDepartment of Chemical Engineering and ChemistryEindhoven University of TechnologyP.O. Box 5135600 MBEindhovenThe Netherlands
| | - Matthias Beller
- Leibniz-Institut für Katalyse e.V. an der Universität RostockAlbert-Einstein Strasse 29a18059RostockGermany
| | - Laurent Lefort
- DSM Ahead R&D B.V. Innovative SynthesisP.O. Box 186160 MDGeleenThe Netherlands
| | - Evgeny A. Pidko
- Inorganic Materials Chemistry GroupDepartment of Chemical Engineering and ChemistryEindhoven University of TechnologyP.O. Box 5135600 MBEindhovenThe Netherlands
- ITMO UniversityKronverskskiy pr., 49197101St. PetersburgRussia
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32
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Prichatz C, Alberico E, Baumann W, Junge H, Beller M. Iridium-PNP Pincer Complexes for Methanol Dehydrogenation at Low Base Concentration. ChemCatChem 2017. [DOI: 10.1002/cctc.201700015] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Christoph Prichatz
- Leibniz-Institut für Katalyse e. V. an der; Universität Rostock; Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Elisabetta Alberico
- Leibniz-Institut für Katalyse e. V. an der; Universität Rostock; Albert-Einstein-Straße 29a 18059 Rostock Germany
- Instituto di Chimica Biomolecolare; CNR; Sassari Italy
| | - Wolfgang Baumann
- Leibniz-Institut für Katalyse e. V. an der; Universität Rostock; Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Henrik Junge
- Leibniz-Institut für Katalyse e. V. an der; Universität Rostock; Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Matthias Beller
- Leibniz-Institut für Katalyse e. V. an der; Universität Rostock; Albert-Einstein-Straße 29a 18059 Rostock Germany
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33
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Henrion M, Roisnel T, Couturier JL, Dubois JL, Sortais JB, Darcel C, Carpentier JF. Ruthenium complexes bearing amino-bis(phosphinite) or amino-bis(aminophosphine) ligands: Application in catalytic ester hydrogenation. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.01.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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34
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Yuwen J, Chakraborty S, Brennessel WW, Jones WD. Additive-Free Cobalt-Catalyzed Hydrogenation of Esters to Alcohols. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00623] [Citation(s) in RCA: 93] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Jing Yuwen
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Sumit Chakraborty
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - William W. Brennessel
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - William D. Jones
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
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35
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van Putten R, Uslamin EA, Garbe M, Liu C, Gonzalez-de-Castro A, Lutz M, Junge K, Hensen EJM, Beller M, Lefort L, Pidko EA. Non-Pincer-Type Manganese Complexes as Efficient Catalysts for the Hydrogenation of Esters. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201701365] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Robbert van Putten
- Inorganic Materials Chemistry Group; Department of Chemical Engineering and Chemistry; Eindhoven University of Technology; P.O. Box 513 5600 MB Eindhoven The Netherlands
| | - Evgeny A. Uslamin
- Inorganic Materials Chemistry Group; Department of Chemical Engineering and Chemistry; Eindhoven University of Technology; P.O. Box 513 5600 MB Eindhoven The Netherlands
| | - Marcel Garbe
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein Strasse 29a 18059 Rostock Germany
| | - Chong Liu
- Inorganic Materials Chemistry Group; Department of Chemical Engineering and Chemistry; Eindhoven University of Technology; P.O. Box 513 5600 MB Eindhoven The Netherlands
| | | | - Martin Lutz
- Crystal and Structural Chemistry; Bijvoet Center for Biomolecular Research; Utrecht University; Padualaan 8 3584 CH Utrecht The Netherlands
| | - Kathrin Junge
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein Strasse 29a 18059 Rostock Germany
| | - Emiel J. M. Hensen
- Inorganic Materials Chemistry Group; Department of Chemical Engineering and Chemistry; Eindhoven University of Technology; P.O. Box 513 5600 MB Eindhoven The Netherlands
| | - Matthias Beller
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein Strasse 29a 18059 Rostock Germany
| | - Laurent Lefort
- DSM Ahead R&D B.V. Innovative Synthesis; P.O. Box 18 6160 MD Geleen The Netherlands
| | - Evgeny A. Pidko
- Inorganic Materials Chemistry Group; Department of Chemical Engineering and Chemistry; Eindhoven University of Technology; P.O. Box 513 5600 MB Eindhoven The Netherlands
- ITMO University; Kronverskskiy pr., 49 197101 St. Petersburg Russia
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36
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Wang Z, Chen X, Liu B, Liu QB, Solan GA, Yang X, Sun WH. Cooperative interplay between a flexible PNN-Ru(ii) complex and a NaBH4 additive in the efficient catalytic hydrogenation of esters. Catal Sci Technol 2017. [DOI: 10.1039/c6cy02413k] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Low catalyst loadings of the PNN-bearing ruthenium(ii) complex, [fac-PNN]RuH(PPh3)(CO), in combination with 5 mol% of NaBH4, efficiently catalyze the hydrogenation of a broad range of esters to their corresponding alcohols under mild pressures of H2.
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Affiliation(s)
- Zheng Wang
- College of Chemistry and Materials Science
- Hebei Normal University
- Shijiazhuang 050024
- China
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science
| | - Xiangyang Chen
- Beijing National Laboratory for Molecular Science
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Bo Liu
- College of Chemistry and Materials Science
- Hebei Normal University
- Shijiazhuang 050024
- China
| | - Qing-bin Liu
- College of Chemistry and Materials Science
- Hebei Normal University
- Shijiazhuang 050024
- China
| | - Gregory A. Solan
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Xinzheng Yang
- Beijing National Laboratory for Molecular Science
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Wen-Hua Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
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37
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Wei Z, Junge K, Beller M, Jiao H. Hydrogenation of phenyl-substituted CN, CN,CC, CC and CO functional groups by Cr, Mo and W PNP pincer complexes – a DFT study. Catal Sci Technol 2017. [DOI: 10.1039/c7cy00629b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The hydrogenation of phenyl-substituted CN, CN, CC, CC and CO functional groups catalyzed by PNP pincer amido M(NO)(CO)(PNP) and amino HM(NO)(CO)(PNHP) complexes [M = Cr, Mo and W; PNP = N(CH2CH2P(isopropyl)2)2] has been computed.
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Affiliation(s)
- Zhihong Wei
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- Rostock
- Germany
| | - Kathrin Junge
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- Rostock
- Germany
| | - Matthias Beller
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- Rostock
- Germany
| | - Haijun Jiao
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- Rostock
- Germany
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38
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Elangovan S, Garbe M, Jiao H, Spannenberg A, Junge K, Beller M. Hydrogenation of Esters to Alcohols Catalyzed by Defined Manganese Pincer Complexes. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607233] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Saravanakumar Elangovan
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock; Albert-Einstein Strasse 29a Rostock 18059 Germany
| | - Marcel Garbe
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock; Albert-Einstein Strasse 29a Rostock 18059 Germany
| | - Haijun Jiao
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock; Albert-Einstein Strasse 29a Rostock 18059 Germany
| | - Anke Spannenberg
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock; Albert-Einstein Strasse 29a Rostock 18059 Germany
| | - Kathrin Junge
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock; Albert-Einstein Strasse 29a Rostock 18059 Germany
| | - Matthias Beller
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock; Albert-Einstein Strasse 29a Rostock 18059 Germany
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39
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Elangovan S, Garbe M, Jiao H, Spannenberg A, Junge K, Beller M. Hydrogenation of Esters to Alcohols Catalyzed by Defined Manganese Pincer Complexes. Angew Chem Int Ed Engl 2016; 55:15364-15368. [PMID: 27690363 DOI: 10.1002/anie.201607233] [Citation(s) in RCA: 219] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Indexed: 12/21/2022]
Abstract
The first manganese-catalyzed hydrogenation of esters to alcohols has been developed. The combination of Mn(CO)5 Br with [HN(CH2 CH2 P(Et)2 )2 ] leads to a mixture of cationic and neutral Mn PNP pincer complexes, which enable the reduction of various ester substrates, including aromatic and aliphatic esters as well as diesters and lactones. Notably, related pincer complexes with isopropyl or cyclohexyl substituents showed very low activity.
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Affiliation(s)
- Saravanakumar Elangovan
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein Strasse 29a, Rostock, 18059, Germany
| | - Marcel Garbe
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein Strasse 29a, Rostock, 18059, Germany
| | - Haijun Jiao
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein Strasse 29a, Rostock, 18059, Germany
| | - Anke Spannenberg
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein Strasse 29a, Rostock, 18059, Germany
| | - Kathrin Junge
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein Strasse 29a, Rostock, 18059, Germany
| | - Matthias Beller
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein Strasse 29a, Rostock, 18059, Germany
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40
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Esteruelas MA, López AM, Oliván M. Polyhydrides of Platinum Group Metals: Nonclassical Interactions and σ-Bond Activation Reactions. Chem Rev 2016; 116:8770-847. [DOI: 10.1021/acs.chemrev.6b00080] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Miguel A. Esteruelas
- Departamento de
Química
Inorgánica, Instituto de Síntesis Química
y Catálisis Homogénea (ISQCH), Centro de Innovación
en Química Avanzada (ORFEO−CINQA), Universidad de Zaragoza−CSIC, 50009 Zaragoza, Spain
| | - Ana M. López
- Departamento de
Química
Inorgánica, Instituto de Síntesis Química
y Catálisis Homogénea (ISQCH), Centro de Innovación
en Química Avanzada (ORFEO−CINQA), Universidad de Zaragoza−CSIC, 50009 Zaragoza, Spain
| | - Montserrat Oliván
- Departamento de
Química
Inorgánica, Instituto de Síntesis Química
y Catálisis Homogénea (ISQCH), Centro de Innovación
en Química Avanzada (ORFEO−CINQA), Universidad de Zaragoza−CSIC, 50009 Zaragoza, Spain
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41
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Dubey A, Khaskin E. Catalytic Ester Metathesis Reaction and Its Application to Transfer Hydrogenation of Esters. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00827] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Abhishek Dubey
- Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa, 904-0495 Japan
| | - Eugene Khaskin
- Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa, 904-0495 Japan
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42
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Brewster TP, Rezayee NM, Culakova Z, Sanford MS, Goldberg KI. Base-Free Iridium-Catalyzed Hydrogenation of Esters and Lactones. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00263] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Timothy P. Brewster
- Department
of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Nomaan M. Rezayee
- Department
of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Zuzana Culakova
- Department
of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Melanie S. Sanford
- Department
of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Karen I. Goldberg
- Department
of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
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43
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Kim D, Le L, Drance MJ, Jensen KH, Bogdanovski K, Cervarich TN, Barnard MG, Pudalov NJ, Knapp SMM, Chianese AR. Ester Hydrogenation Catalyzed by CNN-Pincer Complexes of Ruthenium. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00009] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Daniel Kim
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Linh Le
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Myles J. Drance
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Kelsey H. Jensen
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Kristijan Bogdanovski
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Tia N. Cervarich
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Melissa G. Barnard
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Natalie J. Pudalov
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Spring Melody M. Knapp
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Anthony R. Chianese
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
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44
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Elangovan S, Wendt B, Topf C, Bachmann S, Scalone M, Spannenberg A, Jiao H, Baumann W, Junge K, Beller M. Improved Second Generation Iron Pincer Complexes for Effective Ester Hydrogenation. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201500930] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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45
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Dub PA, Scott BL, Gordon JC. First-row transition metal complexes of ENENES ligands: the ability of the thioether donor to impact the coordination chemistry. Dalton Trans 2016; 45:1560-71. [DOI: 10.1039/c5dt03855c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The reactions of two variants of ENENES ligands, E(CH2)2NH(CH)2SR, where E = 4-morpholinyl, R = Ph (a), Bn (b) with MCl2 (M = Mn, Fe, Co, Ni and Cu) in coordinating solvents (MeCN, EtOH) affords isolable complexes, whose magnetic susceptibility measurements suggest paramagnetism and a high-spin formulation.
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Affiliation(s)
- Pavel A. Dub
- Chemistry Division
- Los Alamos National Laboratory
- Los Alamos
- USA
| | - Brian L. Scott
- Materials and Physics Applications Division
- Los Alamos National Laboratory
- Los Alamos
- USA
| | - John C. Gordon
- Chemistry Division
- Los Alamos National Laboratory
- Los Alamos
- USA
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46
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Deng L, Kang B, Englert U, Klankermayer J, Palkovits R. Direct Hydrogenation of Biobased Carboxylic Acids Mediated by a Nitrogen-centered Tridentate Phosphine Ligand. CHEMSUSCHEM 2016; 9:177-180. [PMID: 26749183 DOI: 10.1002/cssc.201501461] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Indexed: 06/05/2023]
Abstract
A novel nitrogen-centered tridentate ligand was identified from a series of multidentate ligands and applied for the direct hydrogenation of 9 biogenic acids into alcohols, lactones and esters with high yields. Comparison of substrates and ruthenium precursors suggested that the Ru(II) hydride cationic species was more active to transform acids than the corresponding lactone or esters.
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Affiliation(s)
- Li Deng
- Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Worringerweg 2, 52074, Aachen, Germany.
| | - Bin Kang
- Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Worringerweg 2, 52074, Aachen, Germany
| | - Ulli Englert
- Institute of Inorganic Chemistry, RWTH Aachen University, Aachen, Germany
| | - Jürgen Klankermayer
- Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Worringerweg 2, 52074, Aachen, Germany
| | - Regina Palkovits
- Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Worringerweg 2, 52074, Aachen, Germany.
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47
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Lange S, Elangovan S, Cordes C, Spannenberg A, Jiao H, Junge H, Bachmann S, Scalone M, Topf C, Junge K, Beller M. Selective catalytic hydrogenation of nitriles to primary amines using iron pincer complexes. Catal Sci Technol 2016. [DOI: 10.1039/c6cy00834h] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The selective catalytic hydrogenation of nitriles to primary amines with the well-defined Fe(PNPCy) pincer complex 2 is reported.
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Affiliation(s)
- S. Lange
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
| | - S. Elangovan
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
| | - C. Cordes
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
| | - A. Spannenberg
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
| | - H. Jiao
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
| | - H. Junge
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
| | - S. Bachmann
- F. Hoffmann-La Roche AG
- Process Research & Development
- CoE Catalysis
- 4070 Basel
- Switzerland
| | - M. Scalone
- F. Hoffmann-La Roche AG
- Process Research & Development
- CoE Catalysis
- 4070 Basel
- Switzerland
| | - C. Topf
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
| | - K. Junge
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
| | - M. Beller
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
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48
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Neumann J, Bornschein C, Jiao H, Junge K, Beller M. Hydrogenation of Aliphatic and Aromatic Nitriles Using a Defined Ruthenium PNP Pincer Catalyst. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501007] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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49
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Werkmeister S, Neumann J, Junge K, Beller M. Pincer-Type Complexes for Catalytic (De)Hydrogenation and Transfer (De)Hydrogenation Reactions: Recent Progress. Chemistry 2015; 21:12226-50. [DOI: 10.1002/chem.201500937] [Citation(s) in RCA: 275] [Impact Index Per Article: 30.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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50
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Dub PA, Scott BL, Gordon JC. Air-Stable NNS (ENENES) Ligands and Their Well-Defined Ruthenium and Iridium Complexes for Molecular Catalysis. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00432] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Pavel A. Dub
- Chemistry Division, and ‡Materials and Physics Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Brian L. Scott
- Chemistry Division, and ‡Materials and Physics Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - John C. Gordon
- Chemistry Division, and ‡Materials and Physics Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
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