1
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Park S, Seo MS, Kim M, Lee KM, Graham PM, Lee Y. Reactivity of low-valent nickel carbonyl species supported by acridane based PNP ligands towards iodoalkanes. Dalton Trans 2024; 53:10120-10125. [PMID: 38817194 DOI: 10.1039/d4dt01022a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2024]
Abstract
Nickel monocarbonyl species with Ni(I) and Ni(0) have been synthesized and fully characterized by employing an acriPNP-Ph pincer ligand having a -C(Ph)2- bridge moiety to tether two aromatic rings. To see the effect of the bridge moiety, these complexes were structurally compared with the previously studied nickel complexes supported by PNP and acriPNP-Me ligands and methylation of the nickel carbonyl species was particularly investigated. Since a Ni(I)-CO species is known to be one of the key intermediates during the C-C coupling reaction to give an acetyl species, according to the paramagnetic mechanism of acetyl coenzyme A synthase (ACS), their reactivity toward MeI has been examined. Methylation of a nickel(I)-CO species reveals enhanced C-C coupling when both acriPNP-Me and acriPNP-Ph ligands were used. According to spin density analysis calculated by density functional theory, all Ni(I)-CO species reveal similar spin density at nickel and the carbon atom of CO. X-ray crystallographic data suggest that the corresponding selectivity may be related to the steric influence. For both (acriPNP-Ph)Ni-CO (2) and (acriPNP-Me)Ni-CO (2'), the nickel(I) site is sterically well protected, leading to selective interaction with a methyl radical to give a nickel acyl product. Steric influence was marginally observed when an anionic {(acriPNP-R)Ni-CO}- (R = Me or Ph) species reacted with MeI. The corresponding C-C coupled product was also observed from the methylation of nickel(0)-CO species.
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Affiliation(s)
- Sanha Park
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea.
| | - Mi Sook Seo
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea.
| | - Mingi Kim
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Kang Mun Lee
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Peter M Graham
- Department of Chemistry, Saint Joseph's University, 5600 City Avenue, Philadelphia, PA 19131, USA
| | - Yunho Lee
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea.
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2
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Padmanaban S, Chun J, Lee Y, Cho KB, Choi J, Lee Y. Nitrate Upcycling Mediated by Organonickel Catalysis. Angew Chem Int Ed Engl 2024:e202408457. [PMID: 38853142 DOI: 10.1002/anie.202408457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2024] [Revised: 06/03/2024] [Accepted: 06/04/2024] [Indexed: 06/11/2024]
Abstract
Nitrogen oxides (NOx) are major environmental pollutants and to neutralize this long-term environmental threat, new catalytic methods are needed. Although there are biological denitrification processes involving four different enzymatic reactions to convert nitrate (NO3 -) into dinitrogen (N2), it is unfortunately difficult to apply in industry due to the complexity of the processes. In particular, nitrate is difficult to functionalize because of its chemical stability. Thus, there is no organometallic catalysis to convert nitrate into useful chemicals. Herein, we present a nickel pincer complex that is effective as a bifunctional catalyst to stepwise deoxygenate NO3 - by carbonylation and further through C-N coupling. By using this nickel catalysis, nitrate salts can be selectively transformed into various oximes (>20 substrates) with excellent conversion (>90 %). Here, we demonstrate for the first time that the highly inert nitrate ion can be functionalized to produce useful chemicals by a new organonickel catalysis. Our results show that the NOx conversion and utilization (NCU) technology is a successful pathway for environmental restoration coupled with value-added chemical generation.
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Affiliation(s)
- Sudakar Padmanaban
- Department of Chemistry, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jeewon Chun
- Department of Chemistry, Seoul National University, Seoul, 08826, Republic of Korea
| | - Youngseob Lee
- Department of Chemistry and Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju, 54896, Republic of Korea
| | - Kyung-Bin Cho
- Department of Chemistry and Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju, 54896, Republic of Korea
| | - Jonghoon Choi
- Department of Chemistry Education, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Yunho Lee
- Department of Chemistry, Seoul National University, Seoul, 08826, Republic of Korea
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3
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Lewis LC, Sanabria-Gracia JA, Lee Y, Jenkins AJ, Shafaat HS. Electronic isomerism in a heterometallic nickel-iron-sulfur cluster models substrate binding and cyanide inhibition of carbon monoxide dehydrogenase. Chem Sci 2024; 15:5916-5928. [PMID: 38665523 PMCID: PMC11040638 DOI: 10.1039/d4sc00023d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Accepted: 03/04/2024] [Indexed: 04/28/2024] Open
Abstract
The nickel-iron carbon monoxide dehydrogenase (CODH) enzyme uses a heterometallic nickel-iron-sulfur ([NiFe4S4]) cluster to catalyze the reversible interconversion of carbon dioxide (CO2) and carbon monoxide (CO). These reactions are essential for maintaining the global carbon cycle and offer a route towards sustainable greenhouse gas conversion but have not been successfully replicated in synthetic models, in part due to a poor understanding of the natural system. Though the general protein architecture of CODH is known, the electronic structure of the active site is not well-understood, and the mechanism of catalysis remains unresolved. To better understand the CODH enzyme, we have developed a protein-based model containing a heterometallic [NiFe3S4] cluster in the Pyrococcus furiosus (Pf) ferredoxin (Fd). This model binds small molecules such as carbon monoxide and cyanide, analogous to CODH. Multiple redox- and ligand-bound states of [NiFe3S4] Fd (NiFd) have been investigated using a suite of spectroscopic techniques, including resonance Raman, Ni and Fe K-edge X-ray absorption spectroscopy, and electron paramagnetic resonance, to resolve charge and spin delocalization across the cluster, site-specific electron density, and ligand activation. The facile movement of charge through the cluster highlights the fluidity of electron density within iron-sulfur clusters and suggests an electronic basis by which CN- inhibits the native system while the CO-bound state continues to elude isolation in CODH. The detailed characterization of isolable states that are accessible in our CODH model system provides valuable insight into unresolved enzymatic intermediates and offers design principles towards developing functional mimics of CODH.
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Affiliation(s)
- Luke C Lewis
- Department of Chemistry and Biochemistry, The Ohio State University Columbus OH 43210 USA
| | - José A Sanabria-Gracia
- Department of Chemistry and Biochemistry, The Ohio State University Columbus OH 43210 USA
| | - Yuri Lee
- Department of Chemistry and Biochemistry, The Ohio State University Columbus OH 43210 USA
- Department of Chemistry and Biochemistry, University of California, Los Angeles Los Angeles CA 90095 USA
| | - Adam J Jenkins
- Department of Chemistry and Biochemistry, The Ohio State University Columbus OH 43210 USA
| | - Hannah S Shafaat
- Department of Chemistry and Biochemistry, The Ohio State University Columbus OH 43210 USA
- Department of Chemistry and Biochemistry, University of California, Los Angeles Los Angeles CA 90095 USA
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4
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Álvarez-Rodríguez L, Ríos P, Laglera-Gándara CJ, Jurado A, Fernández-de-Córdova FJ, Gunnoe TB, Rodríguez A. Cleavage of Carbon Dioxide C=O Bond Promoted by Nickel-Boron Cooperativity in a PBP-Ni Complex. Angew Chem Int Ed Engl 2023; 62:e202306315. [PMID: 37399341 DOI: 10.1002/anie.202306315] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 06/28/2023] [Accepted: 07/03/2023] [Indexed: 07/05/2023]
Abstract
The synthesis and characterization of (tBu PBP)Ni(OAc) (5) by insertion of carbon dioxide into the Ni-C bond of (tBu PBP)NiMe (1) is presented. An unexpected CO2 cleavage process involving the formation of new B-O and Ni-CO bonds leads to the generation of a butterfly-structured tetra-nickel cluster (tBu PBOP)2 Ni4 (μ-CO)2 (6). Mechanistic investigation of this reaction indicates a reductive scission of CO2 by O-atom transfer to the boron atom via a cooperative nickel-boron mechanism. The CO2 activation reaction produces a three-coordinate (tBu P2 BO)Ni-acyl intermediate (A) that leads to a (tBu P2 BO)-NiI complex (B) via a likely radical pathway. The NiI species is trapped by treatment with the radical trap (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO) to give (tBu P2 BO)NiII (η2 -TEMPO) (7). Additionally, 13 C and 1 H NMR spectroscopy analysis using 13 C-enriched CO2 provides information about the species involved in the CO2 activation process.
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Affiliation(s)
- Lucía Álvarez-Rodríguez
- Instituto de Investigaciones Químicas-Departamento de Química Inorgánica, Universidad de Sevilla-Consejo Superior de Investigaciones Científicas, Centro de Innovación en Química Avanzada (ORFEO-CINQA), C/Américo Vespucio 49, 41092, Sevilla, Spain
| | - Pablo Ríos
- Instituto de Investigaciones Químicas-Departamento de Química Inorgánica, Universidad de Sevilla-Consejo Superior de Investigaciones Científicas, Centro de Innovación en Química Avanzada (ORFEO-CINQA), C/Américo Vespucio 49, 41092, Sevilla, Spain
| | - Carlos J Laglera-Gándara
- Instituto de Investigaciones Químicas-Departamento de Química Inorgánica, Universidad de Sevilla-Consejo Superior de Investigaciones Científicas, Centro de Innovación en Química Avanzada (ORFEO-CINQA), C/Américo Vespucio 49, 41092, Sevilla, Spain
| | - Andrea Jurado
- Instituto de Investigaciones Químicas-Departamento de Química Inorgánica, Universidad de Sevilla-Consejo Superior de Investigaciones Científicas, Centro de Innovación en Química Avanzada (ORFEO-CINQA), C/Américo Vespucio 49, 41092, Sevilla, Spain
| | - Francisco José Fernández-de-Córdova
- Instituto de Investigaciones Químicas-Departamento de Química Inorgánica, Universidad de Sevilla-Consejo Superior de Investigaciones Científicas, Centro de Innovación en Química Avanzada (ORFEO-CINQA), C/Américo Vespucio 49, 41092, Sevilla, Spain
| | - T Brent Gunnoe
- Department of Chemistry, University of Virginia, Charlottesville, VA 22904, USA
| | - Amor Rodríguez
- Instituto de Investigaciones Químicas-Departamento de Química Inorgánica, Universidad de Sevilla-Consejo Superior de Investigaciones Científicas, Centro de Innovación en Química Avanzada (ORFEO-CINQA), C/Américo Vespucio 49, 41092, Sevilla, Spain
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5
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Hong YH, Lee YM, Nam W, Fukuzumi S. Reaction Intermediates in Artificial Photosynthesis with Molecular Catalysts. ACS Catal 2022. [DOI: 10.1021/acscatal.2c05033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Young Hyun Hong
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul03760, Korea
| | - Yong-Min Lee
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul03760, Korea
| | - Wonwoo Nam
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul03760, Korea
| | - Shunichi Fukuzumi
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul03760, Korea
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6
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Hu C, Ding Y, Bai Y, Guo L, Cui C. Synthesis and reactivity of a μ-1,2-dinitrogen dinickel(II) complex with a C-H activated silaamidinate pincer ligand. Chem Commun (Camb) 2022; 58:13795-13798. [PMID: 36441626 DOI: 10.1039/d2cc05472h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Reaction of the silaamidinate nickel bromide LSi(NAr)2NiBr2Li(thf)(OEt2) (L = PhC(NtBu)2, Ar = 2,6-iPr2C6H3, 1) with NaHBEt3 led to intramolecular C-H activation with the formation of the μ-1,2-dinitrogen dinickel pincer complex [LSi(NAr)(NAr)Ni]2(μ-1,2-N2) (Ar = 2-C(CH3)2-6-iPrC6H3, 2). Single-crystal X-ray diffraction analysis of 2 disclosed a square planar Ni(II) atom bridged by N2. Reaction of 2 with carbon monoxide and 2,6-dimethylphenyl isocyanide yielded square planar carbonyl and isocyanide complexes 3 and 4 with release of N2. These results provide new approaches for the coordination of N2 with nickel(II) species.
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Affiliation(s)
- Chaopeng Hu
- State Key Laboratory of Elemento-organic Chemistry and College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Yazhou Ding
- State Key Laboratory of Elemento-organic Chemistry and College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Yunping Bai
- State Key Laboratory of Elemento-organic Chemistry and College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Lulu Guo
- State Key Laboratory of Elemento-organic Chemistry and College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Chunming Cui
- State Key Laboratory of Elemento-organic Chemistry and College of Chemistry, Nankai University, Tianjin 300071, China.
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7
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Ruickoldt J, Basak Y, Domnik L, Jeoung JH, Dobbek H. On the Kinetics of CO 2 Reduction by Ni, Fe-CO Dehydrogenases. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jakob Ruickoldt
- Humboldt-Universität zu Berlin, Institute of Biology, Unter den Linden 6, 10099Berlin, Germany
| | - Yudhajeet Basak
- Humboldt-Universität zu Berlin, Institute of Biology, Unter den Linden 6, 10099Berlin, Germany
| | - Lilith Domnik
- Humboldt-Universität zu Berlin, Institute of Biology, Unter den Linden 6, 10099Berlin, Germany
| | - Jae-Hun Jeoung
- Humboldt-Universität zu Berlin, Institute of Biology, Unter den Linden 6, 10099Berlin, Germany
| | - Holger Dobbek
- Humboldt-Universität zu Berlin, Institute of Biology, Unter den Linden 6, 10099Berlin, Germany
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8
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Hermosilla P, García-Orduña P, Sanz Miguel PJ, Polo V, Casado MA. Nucleophilic Reactivity at a ═CH Arm of a Lutidine-Based CNC/Rh System: Unusual Alkyne and CO 2 Activation. Inorg Chem 2022; 61:7120-7129. [PMID: 35476902 PMCID: PMC9994788 DOI: 10.1021/acs.inorgchem.2c00617] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Reaction of an amido pincer complex [(CNC)*Rh(CO)] (1) (CNC* is the deprotonated form of CNC) with carbon dioxide gave a neutral complex [(CNC-CO2)Mes*Rh(CO)] (2), which is the result of a C-C bond-forming reaction between the deprotonated arm of the CNC* ligand and CO2. The molecular structure of 2 showed a zwitterionic complex, where the CO2 moiety is covalently connected to the former ═CH arm of the CNC* pincer ligand. The unusual structure of 1 allowed us to explore the reactivity of the CO2 moiety with selected primary amines RNH2 (benzylamine and ammonia), which afforded cationic complexes [(CNC)MesRh(CO)][HRNC(O)O] (R = Bz (3), H (4)). Compounds 3 and 4 are the result of a C-N coupling between the incoming amine and the CO2 fragment covalently connected to the pincer ligand in 2, a process that involves protonation of the "CH-CO2" fragment in 2 from the respective amines. Once revealed the nucleophilic character of the ═CH fragment in 1, we explored its reactivity with alkynes, a study that enlightened a novel reactivity trend in alkyne activation. Reaction of 1 with terminal alkynes RC≡CH (R = Ph, 2-py, 4-C6H4-CF3) yielded neutral complexes [(CNC-CH═CHR)Mes*Rh(CO)] (R = Ph (5), 2-py (6), 4-C6H4-CF3 (7)) in good yields. Deuterium labeling experiments with PhC≡CD confirmed that complex 5 is the product of a formal insertion of the alkyne into the C(sp2)-H bond of the deprotonated arm in 1. This structural proposal was further confirmed by the X-ray molecular structure of phenyl complex 5, which showed the alkyne covalently linked to the pincer ligand. Besides, this novel transformation was analyzed by DFT methods and showed a metal-ligand cooperative mechanism, based on the initial electrophilic attack of the alkyne to the ═CH arm of the CNCMes* ligand (making a new C-C bond) followed by the action of a protic base (HN(SiMe3)2), which is able to perform a proton rearrangement that leads to the final product 5.
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Affiliation(s)
- Pablo Hermosilla
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Pilar García-Orduña
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Pablo J Sanz Miguel
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Víctor Polo
- Departamento de Química Física and Instituto de Biocomputación y Física de los Sistemas Complejos (BIFI), Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Miguel A Casado
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
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9
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Zhai J, You F, Xu S, Zhu A, Kang X, So YM, Shi X. Rare-Earth-Metal Complexes Bearing an Iminodibenzyl-PNP Pincer Ligand: Synthesis and Reactivity toward 3,4-Selective Polymerization of 1,3-Dienes. Inorg Chem 2022; 61:1287-1296. [PMID: 34990130 DOI: 10.1021/acs.inorgchem.1c02378] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A PNP-pincer ligand provides a versatile ligation framework, which is highly useful in organometallic chemistry and catalytic chemistry. In this work, by a de novo strategy, a simple and efficient synthetic pathway, has been developed to prepare the new iminodibenzyl-based PNP pincer proligand imin-RPNP(Li or H) (R = isopropyl, phenyl). By employing salt metathesis or direct alkyl elimination, we successfully synthesized a series of iminodibenzyl-PNP rare-earth-metal (Ln = Sc, Y, Dy, Ho, Er, Tm, Lu) complexes and characterized them by NMR and X-ray diffraction analyses. Upon addition of a borate and triisobutylaluminum (TIBA), the rare-earth-metal complexes 2-Y, 2-Dy, 2-Ho, 2-Er, and 2-Tm bearing the imin-PhPNP ligand exhibited unexpectedly high 3,4-selectivity (up to 95%) for the polymerization of 1,3-dienes (isoprene and myrcene); in particular, the chosen yttrium complex 2-Y promoted the 1,3-diene polymerization in a living manner. A computational study suggested that the sterically congested configuration around the metal center imposed by the imin-RPNP ligand might be the main reason for this unusual selectivity.
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Affiliation(s)
- Jingjing Zhai
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, Materials Building, Nanchen Street 333, Shanghai 200444, People's Republic of China
| | - Fen You
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, Materials Building, Nanchen Street 333, Shanghai 200444, People's Republic of China
| | - Suting Xu
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, Materials Building, Nanchen Street 333, Shanghai 200444, People's Republic of China
| | - Ao Zhu
- College of Pharmacy, Dalian Medical University, Dalian 116044, People's Republic of China
| | - Xiaohui Kang
- College of Pharmacy, Dalian Medical University, Dalian 116044, People's Republic of China
| | - Yat-Ming So
- Department of Chemistry, The Hong Kong University of Science and Technology, Hong Kong 0000, People's Republic of China
| | - Xiaochao Shi
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, Materials Building, Nanchen Street 333, Shanghai 200444, People's Republic of China
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10
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Reckziegel A, Battistella B, Werncke G. On the Synthesis of a T‐shaped Imido Nickel Silylamide and Elusive Trigonal Amido Nickel Complexes. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202101102] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | - Beatrice Battistella
- Humboldt-Universität zu Berlin: Humboldt-Universitat zu Berlin Department of Chemistry GERMANY
| | - Gunnar Werncke
- Philipps-Universität Marburg Fachbereich Chemie Hans-Meerwein-Straße 4 35032 Marburg GERMANY
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11
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Korona K, Kornowicz A, Justyniak I, Terlecki M, Błachowski A, Lewiński J. Non-redox reactivity of V( ii) and Fe( ii) formamidinates towards CO 2 resulting in the formation of novel M( ii) carbamates. Dalton Trans 2022; 51:16557-16564. [DOI: 10.1039/d2dt02274e] [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
Multiple CO2 insertions into the M–N bonds of V(ii) and Fe(ii) bis(formamidinates) led to the isolation of three novel carbamates. The CO2 insertion effectivity depended on the solvent used and the metal centre's coordination sphere geometry.
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Affiliation(s)
- Krzesimir Korona
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warszawa, Poland
| | - Arkadiusz Kornowicz
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland
| | - Iwona Justyniak
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland
| | - Michał Terlecki
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warszawa, Poland
| | - Artur Błachowski
- AGH University of Science and Technology, Faculty of Geology, Geophysics and Environmental Protection, al. Mickiewicza 30, 30-059 Kraków, Poland
| | - Janusz Lewiński
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warszawa, Poland
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland
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12
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Lee K, Choi J, Graham PM, Lee Y. Binding of carbon monoxide at a single nickel center and its oxidative reactivity toward
CO
2
and
O
2. B KOREAN CHEM SOC 2021. [DOI: 10.1002/bkcs.12452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kunwoo Lee
- Department of Chemistry Seoul National University Seoul South Korea
| | - Jonghoon Choi
- Department of Chemistry Seoul National University Seoul South Korea
| | - Peter M. Graham
- Department of Chemistry Saint Joseph's University Philadelphia Pennsylvania USA
| | - Yunho Lee
- Department of Chemistry Seoul National University Seoul South Korea
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13
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Abstract
AbstractNickel-catalyzed cross-coupling and photoredox catalytic reactions has found widespread utilities in organic synthesis. Redox processes are key intermediate steps in many catalytic cycles. As a result, it is pertinent to measure and document the redox potentials of various nickel species as precatalysts, catalysts, and intermediates. The redox potentials of a transition-metal complex are governed by its oxidation state, ligand, and the solvent environment. This article tabulates experimentally measured redox potentials of nickel complexes supported on common ligands under various conditions. This review article serves as a versatile tool to help synthetic organic and organometallic chemists evaluate the feasibility and kinetics of redox events occurring at the nickel center, when designing catalytic reactions and preparing nickel complexes.1 Introduction1.1 Scope1.2 Measurement of Formal Redox Potentials1.3 Redox Potentials in Nonaqueous Solution2 Redox Potentials of Nickel Complexes2.1 Redox Potentials of (Phosphine)Ni Complexes2.2 Redox Potentials of (Nitrogen)Ni Complexes2.3 Redox Potentials of (NHC)Ni Complexes
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14
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Min S, Choi J, Yoo C, Graham PM, Lee Y. Ni(0)-promoted activation of C sp2 -H and C sp2 -O bonds. Chem Sci 2021; 12:9983-9990. [PMID: 34377392 PMCID: PMC8317657 DOI: 10.1039/d1sc02210e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 06/16/2021] [Indexed: 11/21/2022] Open
Abstract
A dinickel(0)-N2 complex, stabilized with a rigid acridane-based PNP pincer ligand, was studied for its ability to activate C(sp2)-H and C(sp2)-O bonds. Stabilized by a Ni-μ-N2-Na+ interaction, it activates C-H bonds of unfunctionalized arenes, affording nickel-aryl and nickel-hydride products. Concomitantly, two sodium cations get reduced to Na(0), which was identified and quantified by several methods. Our experimental results, including product analysis and kinetic measurements, strongly suggest that this C(sp2)-H activation does not follow the typical oxidative addition mechanism occurring at a low-valent single metal centre. Instead, via a bimolecular pathway, two powerfully reducing nickel ions cooperatively activate an arene C-H bond and concomitantly reduce two Lewis acidic alkali metals under ambient conditions. As a novel synthetic protocol, nickel(ii)-aryl species were directly synthesized from nickel(ii) precursors in benzene or toluene with excess Na under ambient conditions. Furthermore, when the dinickel(0)-N2 complex is accessed via reduction of the nickel(ii)-phenyl species, the resulting phenyl anion deprotonates a C-H bond of glyme or 15-crown-5 leading to C-O bond cleavage, which produces vinyl ether. The dinickel(0)-N2 species then cleaves the C(sp2)-O bond of vinyl ether to produce a nickel(ii)-vinyl complex. These results may provide a new strategy for the activation of C-H and C-O bonds mediated by a low valent nickel ion supported by a structurally rigidified ligand scaffold.
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Affiliation(s)
- Sehye Min
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
| | - Jonghoon Choi
- Department of Chemistry, Seoul National University Seoul 08826 Republic of Korea +82 2 880 6653
| | - Changho Yoo
- Green Carbon Research Center, Korea Research Institute of Chemical Technology (KRICT) Daejeon 34114 Republic of Korea
| | - Peter M Graham
- Department of Chemistry, Saint Joseph's University 5600 City Avenue Philadelphia PA 19131 USA
| | - Yunho Lee
- Department of Chemistry, Seoul National University Seoul 08826 Republic of Korea +82 2 880 6653
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15
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Choi J, Kim SH, Lee Y. Axial Redox Tuning at a Tetragonal Cobalt Center. Inorg Chem 2021; 60:5647-5659. [PMID: 33788551 DOI: 10.1021/acs.inorgchem.0c03676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Square pyramidal cobalt complexes were prepared to study their multielectron redox properties. To build a stable redox-active cobalt complex, the combination of a tridentate acriPNP (acriPNP- = 4,5-bis(diisopropylphosphino)-2,7,9,9-tetramethyl-9H-acridin-10-ide) ligand with a bidentate ligand, such as 2,2'-bipyridine, 2-(o-phenyl)pyridine, biphenylene, and their analogues, was employed. In a cobalt complex having a tetragonal structure, the dx2-y2 orbital possesses an antibonding character and must remain empty for its structural integrity, while the dz2 orbital acts as a redox-active frontier molecular orbital (FMO). Tuning the redox potential of the Co(II/I) couple was successfully achieved by introducing a different axial donor. The reduction of Co(II) to Co(I) occurs at -2.6 V for a neutral donor but shifts to -3.4 V for an anionic donor. Since the redox-active dz2 orbital is close in energy to other ligand-based orbitals, multielectron redox activity is also observed. Electrochemical measurements indicate three reversible redox events within a window of -3.0-0.0 V vs Fc/Fc+ in tetrahydrofuran (THF). These redox processes are fully reversible for over 100 cycles, reflecting the electrochemical stability of these cobalt complexes. Surprisingly, the oxidation potential of the acriPNP ligand varies dramatically from +0.15 to -2.4 V, which is probably due to the cobalt contribution on the amido-based molecular orbital. The electronic structure of the cobalt complexes was examined structurally, spectroscopically, and theoretically.
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Affiliation(s)
- Jonghoon Choi
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Sun Hee Kim
- Western Seoul Center, Korea Basic Science Institute, Seoul 03759, Republic of Korea
| | - Yunho Lee
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
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16
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Liu D, Xu Z, Yu H, Fu Y. Mechanistic Insights into the Nickel-Catalyzed Regioselective Carboxylation of Allylic Alcohols. Organometallics 2021. [DOI: 10.1021/acs.organomet.0c00789] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- DeGuang Liu
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, iChEM, University of Science and Technology of China, Hefei 230026, China
| | - ZheYuan Xu
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, iChEM, University of Science and Technology of China, Hefei 230026, China
| | - Haizhu Yu
- Department of Chemistry, Center for Atomic Engineering of Advanced Materials, Anhui Provence Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei 230601, China
| | - Yao Fu
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, iChEM, University of Science and Technology of China, Hefei 230026, China
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17
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Zimmermann P, Ar D, Rößler M, Holze P, Cula B, Herwig C, Limberg C. Selective Transformation of Nickel‐Bound Formate to CO or C−C Coupling Products Triggered by Deprotonation and Steered by Alkali‐Metal Ions. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202010180] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Philipp Zimmermann
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Deniz Ar
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Marie Rößler
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Patrick Holze
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Beatrice Cula
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Christian Herwig
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Christian Limberg
- Institut für Chemie Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
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18
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You F, Zhai J, So YM, Shi X. Rigid Acridane-Based Pincer Supported Rare-Earth Complexes for cis-1,4-Polymerization of 1,3-Conjugated Dienes. Inorg Chem 2021; 60:1797-1805. [PMID: 33444001 DOI: 10.1021/acs.inorgchem.0c03274] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A convenient synthetic route has been developed for preparing the novel rigid 4,5-(PR2)2-2,7,9,9-tetramethylacridane-based pincer ligands (acri-RPNP; R = iPr and Ph), and the first rare-earth (Ln = Y, Lu) alkyl complexes bearing the acri-RPNP ligands were synthesized by a salt metathesis reaction (for the isopropyl-substituent acri-iPrPNP complexes, 1-Ln) or direct alkylation (for the phenyl-substituent acri-PhPNP complexes, 2-Ln). For both 1-Ln and 2-Ln, the NMR spectroscopy and X-ray diffraction study confirmed the successful coordination of the acri-RPNP ligand to the central metal ion in a tridentate manner via the two phosphine and the nitrogen donors. In contrast to 1-Ln that are solvent-free complexes, the metal centers in 2-Ln are each coordinated with one tetrahydrofuran molecule. Upon activation by [Ph3C][B(C6F5)4], 1-Y and 2-Lu could catalyze the living polymerization of isoprene and β-myrcene with high catalytic activity and high cis-1,4-selectivity (up to 92.3% for isoprene and 98.5% for β-myrcene). Moreover, the 1-Y/[Ph3C][B(C6F5)4] catalytic system also could promote the polymerization of butadiene and its copolymerization with isoprene to produce copolymers with high cis-1,4-selectivity and narrow polydispersity.
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Affiliation(s)
- Fen You
- Department of Polymer Materials, College of Materials Science and Engineering, Shanghai University, Materials Building, Nanchen Street 333, Shanghai 200444, China
| | - Jingjing Zhai
- Department of Polymer Materials, College of Materials Science and Engineering, Shanghai University, Materials Building, Nanchen Street 333, Shanghai 200444, China
| | - Yat-Ming So
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Xiaochao Shi
- Department of Polymer Materials, College of Materials Science and Engineering, Shanghai University, Materials Building, Nanchen Street 333, Shanghai 200444, China
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19
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Zimmermann P, Ar D, Rößler M, Holze P, Cula B, Herwig C, Limberg C. Selective Transformation of Nickel-Bound Formate to CO or C-C Coupling Products Triggered by Deprotonation and Steered by Alkali-Metal Ions. Angew Chem Int Ed Engl 2021; 60:2312-2321. [PMID: 33084156 PMCID: PMC7898393 DOI: 10.1002/anie.202010180] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 09/30/2020] [Indexed: 11/23/2022]
Abstract
The complexes [LtBu Ni(OCO-κ2 O,C)]M3 [N(SiMe3 )2 ]2 (M=Li, Na, K), synthesized by deprotonation of a nickel formate complex [LtBu NiOOCH] with the corresponding amides M[N(SiMe3 )2 ], feature a NiII -CO2 2- core surrounded by Lewis-acidic cations (M+ ) and the influence of the latter on the behavior and reactivity was studied. The results point to a decrease of CO2 activation within the series Li, Na, and K, which is also reflected in the reactivity with Me3 SiOTf leading to the liberation of CO and formation of a Ni-OSiMe3 complex. Furthermore, in case of K+ , the {[K3 [N(SiMe3 )2 ]2 }+ shell around the Ni-CO2 2- entity was shown to have a large impact on its stabilization and behavior. If the number of K[N(SiMe3 )2 ] equivalents used in the reaction with [LtBu NiOOCH] is decreased from 3 to 0.5, the deprotonated part of the precursor enters a complex reaction sequence with formation of [LtBu NiI (μ-OOCH)NiI LtBu ]K and [LtBu Ni(C2 O4 )NiLtBu ]. The same reaction at higher concentrations additionally led to the formation of a unique hexanuclear NiII complex containing both oxalate and mesoxalate ([O2 C-CO2 -CO2 ]4- ) ligands.
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Affiliation(s)
- Philipp Zimmermann
- Institut für ChemieHumboldt-Universität zu BerlinBrook-Taylor-Straße 212489BerlinGermany
| | - Deniz Ar
- Institut für ChemieHumboldt-Universität zu BerlinBrook-Taylor-Straße 212489BerlinGermany
| | - Marie Rößler
- Institut für ChemieHumboldt-Universität zu BerlinBrook-Taylor-Straße 212489BerlinGermany
| | - Patrick Holze
- Institut für ChemieHumboldt-Universität zu BerlinBrook-Taylor-Straße 212489BerlinGermany
| | - Beatrice Cula
- Institut für ChemieHumboldt-Universität zu BerlinBrook-Taylor-Straße 212489BerlinGermany
| | - Christian Herwig
- Institut für ChemieHumboldt-Universität zu BerlinBrook-Taylor-Straße 212489BerlinGermany
| | - Christian Limberg
- Institut für ChemieHumboldt-Universität zu BerlinBrook-Taylor-Straße 212489BerlinGermany
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20
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Ghosh AC, Duboc C, Gennari M. Synergy between metals for small molecule activation: Enzymes and bio-inspired complexes. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2020.213606] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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21
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Arora V, Narjinari H, Nandi PG, Kumar A. Recent advances in pincer-nickel catalyzed reactions. Dalton Trans 2021; 50:3394-3428. [PMID: 33595564 DOI: 10.1039/d0dt03593a] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Organometallic catalysts have played a key role in accomplishing numerous synthetically valuable organic transformations that are either otherwise not possible or inefficient. The use of precious, sparse and toxic 4d and 5d metals are an apparent downside of several such catalytic systems despite their immense success over the last several decades. The use of complexes containing Earth-abundant, inexpensive and less hazardous 3d metals, such as nickel, as catalysts for organic transformations has been an emerging field in recent times. In particular, the versatile nature of the corresponding pincer-metal complexes, which offers great control of their reactivity via countless variations, has garnered great interest among organometallic chemists who are looking for greener and cheaper alternatives. In this context, the current review attempts to provide a glimpse of recent developments in the chemistry of pincer-nickel catalyzed reactions. Notably, there have been examples of pincer-nickel catalyzed reactions involving two electron changes via purely organometallic mechanisms that are strikingly similar to those observed with heavier Pd and Pt analogues. On the other hand, there have been distinct differences where the pincer-nickel complexes catalyze single-electron radical reactions. The applicability of pincer-nickel complexes in catalyzing cross-coupling reactions, oxidation reactions, (de)hydrogenation reactions, dehydrogenative coupling, hydrosilylation, hydroboration, C-H activation and carbon dioxide functionalization has been reviewed here from synthesis and mechanistic points of view. The flurry of global pincer-nickel related activities offer promising avenues in catalyzing synthetically valuable organic transformations.
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Affiliation(s)
- Vinay Arora
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India.
| | - Himani Narjinari
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India.
| | - Pran Gobinda Nandi
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India.
| | - Akshai Kumar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India. and Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India
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22
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23
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Deng QJ, Chen M, Chen DC, Long HY, Chen CA. Tracking the dissolution-recrystallization structural transformation (DRST) of copper(II) complexes: a combined crystallographic, mass spectrometric and DFT study. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2020; 76:655-662. [PMID: 32624512 DOI: 10.1107/s2053229620006701] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Accepted: 05/19/2020] [Indexed: 11/10/2022]
Abstract
Methanol- and temperature-induced dissolution-recrystallization structural transformation (DRST) was observed among two novel CuII complexes. This is first time that the combination of X-ray crystallography, mass spectrometry and density functional theory (DFT) theoretical calculations has been used to describe the fragmentation and recombination of a mononuclear CuII complex at 60 °C in methanol to obtain a binuclear copper(II) complex. Combining time-dependent high-resolution electrospray mass spectrometry, we propose a possible mechanism for the conversion of bis(8-methoxyquinoline-κ2N,O)bis(thiocyanato-κN)copper(II), [Cu(NCS)2(C10H9NO)2], Cu1, to di-μ-methanolato-κ4O:O-bis[(8-methoxyquinoline-κ2N,O)(thiocyanato-κN)copper(II)], [Cu2(CH3O)2(NCS)2(C10H9NO)2], Cu2, viz. [Cu(SCN)2(L)2] (Cu1) → [Cu(L)2] → [Cu(L)]/L → [Cu2(CH3O)2(NCS)2(L)2] (Cu2). We screened the antitumour activities of L (8-methoxyquinoline), Cu1 and Cu2 and found that the antiproliferative effect of Cu2 on some tumour cells was much greater than that of L and Cu1.
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Affiliation(s)
- Qian Jun Deng
- School of Material Science and Energy Engineering, Foshan University, Foshan 528000, Guangdong, People's Republic of China
| | - Min Chen
- School of Material Science and Energy Engineering, Foshan University, Foshan 528000, Guangdong, People's Republic of China
| | - Dong Chu Chen
- School of Material Science and Energy Engineering, Foshan University, Foshan 528000, Guangdong, People's Republic of China
| | - Hang Yu Long
- School of Material Science and Energy Engineering, Foshan University, Foshan 528000, Guangdong, People's Republic of China
| | - Chang Ai Chen
- School of Material Science and Energy Engineering, Foshan University, Foshan 528000, Guangdong, People's Republic of China
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24
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Xing X, Zhang S, Thierer LM, Gau MR, Carroll PJ, Tomson NC. Reversible nickel-metallacycle formation with a phosphinimine-based pincer ligand. Dalton Trans 2020; 49:7796-7806. [PMID: 32459241 PMCID: PMC7370460 DOI: 10.1039/d0dt01118e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pincer ligands have a remarkable ability to impart control over small molecule activation chemistry and catalytic activity; therefore, the design of new pincer ligands and the exploration of their reactivity profiles continues to be a frontier in synthetic inorganic chemistry. In this work, a novel, monoanionic NNN pincer ligand containing two phosphinimine donors was used to create a series of mononuclear Ni complexes. Ligand metallation in the presence of NaOPh yielded a nickel phenoxide complex that was used to form a mononuclear hydride complex on treatment with pinacolborane. Attempts at ligand metallation with NaN(SiMe3)2 resulted in the activation of both phosphinimine methyl groups to yield an anionic, cis-dialkyl product, in which dissociation of one phosphinimine nitrogen leads to retention of a square planar coordination environment about Ni. Protonolysis of this dialkyl species generated a monoalkyl product that retained the 4-membered metallacycle. The insertion of 2,6-dimethylphenyl isocyanide (xylNC) into this nickel metallacycle, followed by proton transfer, generated a new five-membered nickel metallacycle. Kinetic studies suggested rate-limiting proton transfer (KIE ≥ 3.9 ± 0.5) from the α-methylene unit of the putative iminoacyl intermediate.
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Affiliation(s)
- Xiujing Xing
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, PA 19104, USA.
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25
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Smith JD, Durrant G, Ess DH, Gelfand BS, Piers WE. H/D exchange under mild conditions in arenes and unactivated alkanes with C 6D 6 and D 2O using rigid, electron-rich iridium PCP pincer complexes. Chem Sci 2020; 11:10705-10717. [PMID: 34094323 PMCID: PMC8162389 DOI: 10.1039/d0sc02694h] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 06/15/2020] [Indexed: 11/21/2022] Open
Abstract
The synthesis and characterization of an iridium polyhydride complex (Ir-H4) supported by an electron-rich PCP framework is described. This complex readily loses molecular hydrogen allowing for rapid room temperature hydrogen isotope exchange (HIE) at the hydridic positions and the α-C-H site of the ligand with deuterated solvents such as benzene-d6, toluene-d8 and THF-d8. The removal of 1-2 equivalents of molecular H2 forms unsaturated iridium carbene trihydride (Ir-H3) or monohydride (Ir-H) compounds that are able to create further unsaturation by reversibly transferring a hydride to the ligand carbene carbon. These species are highly active hydrogen isotope exchange (HIE) catalysts using C6D6 or D2O as deuterium sources for the deuteration of a variety of substrates. By modifying conditions to influence the Ir-Hn speciation, deuteration levels can range from near exhaustive to selective only for sterically accessible sites. Preparative level deuterations of select substrates were performed allowing for procurement of >95% deuterated compounds in excellent isolated yields; the catalyst can be regenerated by treatment of residues with H2 and is still active for further reactions.
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Affiliation(s)
- Joel D Smith
- Department of Chemistry, University of Calgary 2500 University Drive NW Calgary Alberta T2N 1N4 Canada
| | - George Durrant
- Department of Chemistry and Biochemistry, Brigham Young University Provo Utah 84602 USA
| | - Daniel H Ess
- Department of Chemistry and Biochemistry, Brigham Young University Provo Utah 84602 USA
| | - Benjamin S Gelfand
- Department of Chemistry, University of Calgary 2500 University Drive NW Calgary Alberta T2N 1N4 Canada
| | - Warren E Piers
- Department of Chemistry, University of Calgary 2500 University Drive NW Calgary Alberta T2N 1N4 Canada
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26
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Merz LS, Ballmann J, Gade LH. Phosphines and
N
‐Heterocycles Joining Forces: an Emerging Structural Motif in PNP‐Pincer Chemistry. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000206] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Lukas S. Merz
- Anorganisch‐Chemisches Institut Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Joachim Ballmann
- Anorganisch‐Chemisches Institut Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Lutz H. Gade
- Anorganisch‐Chemisches Institut Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
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27
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Omolo KO, Bacsa J, Sadighi JP. Acridine Variations for Coordination Chemistry. Isr J Chem 2020. [DOI: 10.1002/ijch.202000006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kevin O. Omolo
- School of Chemistry & BiochemistryGeorgia Institute of Technology Atlanta, Georgia U.S.A
- present address: Intel Corporation, Chandler, AZ U.S.A
| | - John Bacsa
- X-Ray Crystallography CenterDepartment of Chemistry, Emory University Atlanta, Georgia U.S.A
- School of Chemistry & BiochemistryGeorgia Institute of Technology Atlanta, Georgia U.S.A
| | - Joseph P. Sadighi
- School of Chemistry & BiochemistryGeorgia Institute of Technology Atlanta, Georgia, U.S.A
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28
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Choi J, Lee Y. Catalytic hydrogenation of CO2 at a structurally rigidified cobalt center. Inorg Chem Front 2020. [DOI: 10.1039/c9qi01431d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Catalytic hydrogenation of CO2 occurs at a cobalt center supported by a rigidified PNP ligand revealing higher catalytic performance.
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Affiliation(s)
- Jonghoon Choi
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 34141
- Republic of Korea
| | - Yunho Lee
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 34141
- Republic of Korea
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29
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Lapointe S, Khaskin E, Fayzullin RR, Khusnutdinova JR. Nickel(II) Complexes with Electron-Rich, Sterically Hindered PNP Pincer Ligands Enable Uncommon Modes of Ligand Dearomatization. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00558] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Sébastien Lapointe
- Coordination Chemistry and Catalysis Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
| | - Eugene Khaskin
- Coordination Chemistry and Catalysis Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
| | - Robert R. Fayzullin
- Arbuzov Institute of Organic and Physical Chemistry, FCR Kazan Scientific Center, Russian Academy of Sciences, 8 Arbuzov Street, Kazan 420088, Russian Federation
| | - Julia R. Khusnutdinova
- Coordination Chemistry and Catalysis Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
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30
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Leitl J, Marquardt M, Coburger P, Scott DJ, Streitferdt V, Gschwind RM, Müller C, Wolf R. Facile C=O Bond Splitting of Carbon Dioxide Induced by Metal-Ligand Cooperativity in a Phosphinine Iron(0) Complex. Angew Chem Int Ed Engl 2019; 58:15407-15411. [PMID: 31441566 PMCID: PMC6856682 DOI: 10.1002/anie.201909240] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Indexed: 01/08/2023]
Abstract
New iron complexes [Cp*FeL]− (1‐σ and 1‐π, Cp*=C5Me5) containing the chelating phosphinine ligand 2‐(2′‐pyridyl)‐4,6‐diphenylphosphinine (L) have been prepared, and found to undergo facile reaction with CO2 under ambient conditions. The outcome of this reaction depends on the coordination mode of the versatile ligand L. Interaction of CO2 with the isomer 1‐π, in which L binds to Fe through the phosphinine moiety in an η5 fashion, leads to the formation of 3‐π, in which CO2 has undergone electrophilic addition to the phosphinine group. In contrast, interaction with 1‐σ—in which L acts as a σ‐chelating [P,N] ligand—leads to product 3‐σ in which one C=O bond has been completely broken. Such CO2 cleavage reactions are extremely rare for late 3d metals, and this represents the first such example mediated by a single Fe centre.
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Affiliation(s)
- Julia Leitl
- University of Regensburg, Institute of Inorganic Chemistry, 93040, Regensburg, Germany
| | - Michael Marquardt
- Freie Universität Berlin, Institut für Chemie und Biochemie, Fabeckstr. 34/36, 14195, Berlin, Germany
| | - Peter Coburger
- University of Regensburg, Institute of Inorganic Chemistry, 93040, Regensburg, Germany
| | - Daniel J Scott
- University of Regensburg, Institute of Inorganic Chemistry, 93040, Regensburg, Germany
| | - Verena Streitferdt
- University of Regensburg, Institute of Organic Chemistry, 93040, Regensburg, Germany
| | - Ruth M Gschwind
- University of Regensburg, Institute of Organic Chemistry, 93040, Regensburg, Germany
| | - Christian Müller
- Freie Universität Berlin, Institut für Chemie und Biochemie, Fabeckstr. 34/36, 14195, Berlin, Germany
| | - Robert Wolf
- University of Regensburg, Institute of Inorganic Chemistry, 93040, Regensburg, Germany
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31
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Leitl J, Marquardt M, Coburger P, Scott DJ, Streitferdt V, Gschwind RM, Müller C, Wolf R. C=O‐Bindungsspaltung in Kohlendioxid durch einen Eisen(0)‐Phosphininkomplex. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201909240] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Julia Leitl
- Universität Regensburg Institut für Anorganische Chemie 93040 Regensburg Deutschland
| | - Michael Marquardt
- Freie Universität Berlin Institut für Chemie und Biochemie Fabeckstr. 34/36 14195 Berlin Deutschland
| | - Peter Coburger
- Universität Regensburg Institut für Anorganische Chemie 93040 Regensburg Deutschland
| | - Daniel J. Scott
- Universität Regensburg Institut für Anorganische Chemie 93040 Regensburg Deutschland
| | - Verena Streitferdt
- Universität Regensburg Institut für Organische Chemie 93040 Regensburg Deutschland
| | - Ruth M. Gschwind
- Universität Regensburg Institut für Organische Chemie 93040 Regensburg Deutschland
| | - Christian Müller
- Freie Universität Berlin Institut für Chemie und Biochemie Fabeckstr. 34/36 14195 Berlin Deutschland
| | - Robert Wolf
- Universität Regensburg Institut für Anorganische Chemie 93040 Regensburg Deutschland
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32
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Choi J, Lee Y. A Low‐Spin Three‐Coordinate Cobalt(I) Complex and Its Reactivity toward H
2
and Silane. Angew Chem Int Ed Engl 2019; 58:6938-6942. [DOI: 10.1002/anie.201901007] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Jonghoon Choi
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST) 291 Daehak-ro Yuseong-gu Daejeon 34141 Republic of Korea
| | - Yunho Lee
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST) 291 Daehak-ro Yuseong-gu Daejeon 34141 Republic of Korea
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33
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Ahn S, Hong M, Sundararajan M, Ess DH, Baik MH. Design and Optimization of Catalysts Based on Mechanistic Insights Derived from Quantum Chemical Reaction Modeling. Chem Rev 2019; 119:6509-6560. [DOI: 10.1021/acs.chemrev.9b00073] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Seihwan Ahn
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Republic of Korea
| | - Mannkyu Hong
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Republic of Korea
| | - Mahesh Sundararajan
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Republic of Korea
| | - Daniel H. Ess
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Mu-Hyun Baik
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Republic of Korea
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34
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Choi J, Lee Y. A Low‐Spin Three‐Coordinate Cobalt(I) Complex and Its Reactivity toward H
2
and Silane. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201901007] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jonghoon Choi
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST) 291 Daehak-ro Yuseong-gu Daejeon 34141 Republic of Korea
| | - Yunho Lee
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST) 291 Daehak-ro Yuseong-gu Daejeon 34141 Republic of Korea
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35
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Vollmer MV, Cammarota RC, Lu CC. Reductive Disproportionation of CO
2
Mediated by Bimetallic Nickelate(–I)/Group 13 Complexes. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201801452] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Matthew V. Vollmer
- Department of Chemistry University of Minnesota 207 Pleasant Street SE 55455‐0431 Minneapolis Minnesota USA
| | - Ryan C. Cammarota
- Department of Chemistry University of Minnesota 207 Pleasant Street SE 55455‐0431 Minneapolis Minnesota USA
| | - Connie C. Lu
- Department of Chemistry University of Minnesota 207 Pleasant Street SE 55455‐0431 Minneapolis Minnesota USA
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36
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Nickel Bipyridine (Ni(bpy)3Cl2) Complex Used as Molecular Catalyst for Photocatalytic CO2 Reduction. Catal Letters 2018. [DOI: 10.1007/s10562-018-2586-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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37
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Hartmann NJ, Wu G, Hayton TW. Synthesis and reactivity of a nickel(ii) thioperoxide complex: demonstration of sulfide-mediated N 2O reduction. Chem Sci 2018; 9:6580-6588. [PMID: 30310590 PMCID: PMC6115681 DOI: 10.1039/c8sc02536c] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 06/26/2018] [Indexed: 11/21/2022] Open
Abstract
The “masked” terminal nickel sulfide [K(18-crown-6)][LtBuNiII(S)] mediates the reduction of N2O by CO, via the thioperoxide complex [K(18-crown-6)][LtBuNiII(η2-SO)].
The thiohyponitrite ([SNNO]2–) complex, [K(18-crown-6)][LtBuNiII(κ2-SNNO)] (LtBu = {(2,6-iPr2C6H3)NC(tBu)}2CH), extrudes N2 under mild heating to yield [K(18-crown-6)][LtBuNiII(η2-SO)] (1), along with minor products [K(18-crown-6)][LtBuNiII(η2-OSSO)] (2) and [K(18-crown-6)][LtBuNiII(η2-S2)] (3). Subsequent reaction of 1 with carbon monoxide (CO) results in the formation of [K(18-crown-6)][LtBuNiII(η2-SCO)] (4), [K(18-crown-6)][LtBuNiII(S,O:κ2-SCO2)] (5), [K(18-crown-6)][LtBuNiII(κ2-CO3)] (6), carbonyl sulfide (COS) (7), and [K(18-crown-6)][LtBuNiII(S2CO)] (8). To rationalize the formation of these products we propose that 1 first reacts with CO to form [K(18-crown-6)][LtBuNiII(S)] (I) and CO2, via O-atom abstraction. Subsequently, complex I reacts with CO or CO2 to form 4 and 5, respectively. Similarly, the formation of complex 6 and COS can be rationalized by the reaction of 1 with CO2 to form a putative Ni(ii) monothiopercarbonate, [K(18-crown-6)][LtBuNiII(κ2-SOCO2)] (11). The Ni(ii) monothiopercarbonate subsequently transfers a S-atom to CO to form COS and [K(18-crown-6)][LtBuNiII(κ2-CO3)] (6). Finally, the formation of 8 can be rationalized by the reaction of COS with I. Critically, the observation of complexes 4 and 5 in the reaction mixture reveals the stepwise conversion of [K(18-crown-6)][LtBuNiII(κ2-SNNO)] to 1 and then I, which represents the formal reduction of N2O by CO.
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Affiliation(s)
- Nathaniel J Hartmann
- Department of Chemistry and Biochemistry , University of California , Santa Barbara , California , 93106 USA .
| | - Guang Wu
- Department of Chemistry and Biochemistry , University of California , Santa Barbara , California , 93106 USA .
| | - Trevor W Hayton
- Department of Chemistry and Biochemistry , University of California , Santa Barbara , California , 93106 USA .
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38
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LaPierre EA, Piers WE, Gendy C. Divergent Reactivity of CO2, CO, and Related Substrates at the Nickel Carbon Double Bond of (PCcarbeneP)Ni(II) Pincer Complexes. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00440] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Etienne A. LaPierre
- Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta, Canada T2N 1N4
| | - Warren E. Piers
- Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta, Canada T2N 1N4
| | - Chris Gendy
- Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta, Canada T2N 1N4
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39
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Fukuzumi S, Lee YM, Ahn HS, Nam W. Mechanisms of catalytic reduction of CO 2 with heme and nonheme metal complexes. Chem Sci 2018; 9:6017-6034. [PMID: 30090295 PMCID: PMC6053956 DOI: 10.1039/c8sc02220h] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2018] [Accepted: 06/26/2018] [Indexed: 11/21/2022] Open
Abstract
The catalytic conversion of CO2 into valuable chemicals and fuels has attracted increasing attention, providing a promising route for mitigating the greenhouse effect of CO2 and also meeting the global energy demand. Among many homogeneous and heterogeneous catalysts for CO2 reduction, this mini-review is focused on heme and nonheme metal complexes that act as effective catalysts for the electrocatalytic and photocatalytic reduction of CO2. Because metalloporphyrinoids show strong absorption in the visible region, which is sensitive to the oxidation states of the metals and ligands, they are suited for the detection of reactive intermediates in the catalytic CO2 reduction cycle by electronic absorption spectroscopy. The first part of this review deals with the catalytic mechanism for the one-electron reduction of CO2 to oxalic acid with heme and nonheme metal complexes, with an emphasis on how the formation of highly energetic CO2˙ is avoided. Then, the catalytic mechanism of two-electron reduction of CO2 to produce CO and H2O is compared with that to produce HCOOH. The effect of metals and ligands of the heme and nonheme complexes on the CO or HCOOH product selectivity is also discussed. The catalytic mechanisms of multi-electron reduction of CO2 to methanol (six-electron reduced product) and methane (eight-electron reduced product) are also discussed for both electrocatalytic and photocatalytic systems.
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Affiliation(s)
- Shunichi Fukuzumi
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea . ; ;
- Graduate School of Science and Engineering , Meijo University , Nagoya , Aichi 468-8502 , Japan
| | - Yong-Min Lee
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea . ; ;
- Research Institute for Basic Sciences , Ewha Womans University , Seoul 03760 , Korea
| | - Hyun S Ahn
- Department of Chemistry , Yonsei University , Seoul 03722 , Korea .
| | - Wonwoo Nam
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea . ; ;
- School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , P. R. China
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40
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Buss JA, VanderVelde DG, Agapie T. Lewis Acid Enhancement of Proton Induced CO2 Cleavage: Bond Weakening and Ligand Residence Time Effects. J Am Chem Soc 2018; 140:10121-10125. [DOI: 10.1021/jacs.8b05874] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Joshua A. Buss
- Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Boulevard MC 127-72, Pasadena, California 91125, United States
| | - David G. VanderVelde
- Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Boulevard MC 127-72, Pasadena, California 91125, United States
| | - Theodor Agapie
- Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Boulevard MC 127-72, Pasadena, California 91125, United States
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41
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Schneck F, Schendzielorz F, Hatami N, Finger M, Würtele C, Schneider S. Photochemically Driven Reverse Water-Gas Shift at Ambient Conditions mediated by a Nickel Pincer Complex. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201803396] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Felix Schneck
- Georg-August-Universität; Institut für Anorganische Chemie; Tammannstrasse 4 37077 Göttingen Germany
| | - Florian Schendzielorz
- Georg-August-Universität; Institut für Anorganische Chemie; Tammannstrasse 4 37077 Göttingen Germany
| | - Nareh Hatami
- Georg-August-Universität; Institut für Anorganische Chemie; Tammannstrasse 4 37077 Göttingen Germany
| | - Markus Finger
- Georg-August-Universität; Institut für Anorganische Chemie; Tammannstrasse 4 37077 Göttingen Germany
| | - Christian Würtele
- Georg-August-Universität; Institut für Anorganische Chemie; Tammannstrasse 4 37077 Göttingen Germany
| | - Sven Schneider
- Georg-August-Universität; Institut für Anorganische Chemie; Tammannstrasse 4 37077 Göttingen Germany
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42
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Schneck F, Schendzielorz F, Hatami N, Finger M, Würtele C, Schneider S. Photochemically Driven Reverse Water-Gas Shift at Ambient Conditions mediated by a Nickel Pincer Complex. Angew Chem Int Ed Engl 2018; 57:14482-14487. [DOI: 10.1002/anie.201803396] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 05/08/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Felix Schneck
- Georg-August-Universität; Institut für Anorganische Chemie; Tammannstrasse 4 37077 Göttingen Germany
| | - Florian Schendzielorz
- Georg-August-Universität; Institut für Anorganische Chemie; Tammannstrasse 4 37077 Göttingen Germany
| | - Nareh Hatami
- Georg-August-Universität; Institut für Anorganische Chemie; Tammannstrasse 4 37077 Göttingen Germany
| | - Markus Finger
- Georg-August-Universität; Institut für Anorganische Chemie; Tammannstrasse 4 37077 Göttingen Germany
| | - Christian Würtele
- Georg-August-Universität; Institut für Anorganische Chemie; Tammannstrasse 4 37077 Göttingen Germany
| | - Sven Schneider
- Georg-August-Universität; Institut für Anorganische Chemie; Tammannstrasse 4 37077 Göttingen Germany
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43
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Zimmermann P, Hoof S, Braun-Cula B, Herwig C, Limberg C. A Biomimetic Nickel Complex with a Reduced CO2
Ligand Generated by Formate Deprotonation and Its Behaviour towards CO2. Angew Chem Int Ed Engl 2018; 57:7230-7233. [DOI: 10.1002/anie.201802655] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Indexed: 01/28/2023]
Affiliation(s)
- Philipp Zimmermann
- Humboldt-Universität zu Berlin; Institut für Chemie; Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Santina Hoof
- Humboldt-Universität zu Berlin; Institut für Chemie; Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Beatrice Braun-Cula
- Humboldt-Universität zu Berlin; Institut für Chemie; Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Christian Herwig
- Humboldt-Universität zu Berlin; Institut für Chemie; Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Christian Limberg
- Humboldt-Universität zu Berlin; Institut für Chemie; Brook-Taylor-Straße 2 12489 Berlin Germany
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44
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Abstract
Carbon dioxide conversion mediated by transition metal complexes continues to attract much attention because of its future potential utilization as a nontoxic and inexpensive C1 source for the chemical industry. Given the presence of nickel in natural systems that allow for extremely efficient catalysis, albeit in an Fe cluster arrangement, studies that focus on selective CO2 conversion with synthetic nickel species are currently of considerable interest in our group. In this Account, the selective conversion of CO2 to carbon monoxide occurring at a single nickel center is discussed. The chemistry is based on a series of related nickel pincer complexes with attention to the uniqueness of the coordination geometry, which is crucial in allowing for particular reactivity toward CO2. Our research is inspired by the efficient enzymatic CO2 catalysis occurring at the active site of carbon monoxide dehydrogenase. Since the binding and reactivity toward CO2 are controlled in part by the geometry of a L3Ni scaffold, we have explored the chemistry of low-valent nickel supported by PPMeP and PNP ligands, in which a pseudotetrahedral or square-planar geometry is accommodated. Two isolated nickel-CO2 adducts, (PPMeP)Ni(η2-CO2-κ C) (2) and {Na(12-C-4)2}{(PNP)Ni(η1-CO2-κ C)} (7), clearly demonstrate that the geometry of the nickel ion is crucial in the binding of CO2 and its level of activation. In the case of a square-planar nickel center supported by a PNP ligand, a series of bimetallic metallacarboxylate Ni-μ-CO2-κ C, O-M species (M = H, Na, Ni, Fe) were synthesized, and their structural features and reactivity were studied. Protonation cleaves the C-O bond, resulting in the formation of a nickel(II) monocarbonyl complex. By sequential reduction, the corresponding mono- and zero-valent Ni-CO species were produced. The reactivities of three nickel carbonyl species toward various iodoalkanes and CO2 were explored to address whether their corresponding reactivities could be controlled by the number of valence d electrons. In particular, a (PNP)Ni(0)-CO species (13) shows immediate reactivity toward CO2 but displays multiple product formation. By incorporation of a -CMe2- bridging unit, a structurally rigidified acriPNP ligand was newly designed and produced. This ligand modification was successful in preparing the T-shaped nickel(I) metalloradical species 9 exhibiting open-shell reactivity due to the sterically exposed nickel center possessing a half-filled d x2- y2 orbital. More importantly, the selective addition of CO2 to a nickel(0)-CO species was enabled to afford a nickel(II)-carboxylate species (22) with the expulsion of CO(g). Finally, the (acriPNP)Ni system provides a synthetic cycle in the study of the selective conversion of CO2 to CO that involves two-electron reduction of Ni-CO followed by the direct addition of CO2 to release the coordinated CO ligand.
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Affiliation(s)
- Changho Yoo
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Yeong-Eun Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Yunho Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
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45
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Zimmermann P, Hoof S, Braun-Cula B, Herwig C, Limberg C. Ein biomimetischer Nickelkomplex mit einem reduzierten, durch Formiatdeprotonierung erzeugten CO2
-Liganden und sein Verhalten gegenüber CO2. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802655] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Philipp Zimmermann
- Humboldt-Universität zu Berlin; Institut für Chemie; Brook-Taylor-Straße 2 12489 Berlin Deutschland
| | - Santina Hoof
- Humboldt-Universität zu Berlin; Institut für Chemie; Brook-Taylor-Straße 2 12489 Berlin Deutschland
| | - Beatrice Braun-Cula
- Humboldt-Universität zu Berlin; Institut für Chemie; Brook-Taylor-Straße 2 12489 Berlin Deutschland
| | - Christian Herwig
- Humboldt-Universität zu Berlin; Institut für Chemie; Brook-Taylor-Straße 2 12489 Berlin Deutschland
| | - Christian Limberg
- Humboldt-Universität zu Berlin; Institut für Chemie; Brook-Taylor-Straße 2 12489 Berlin Deutschland
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46
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Oren D, Diskin-Posner Y, Avram L, Feller M, Milstein D. Metal-Ligand Cooperation as Key in Formation of Dearomatized Ni II-H Pincer Complexes and in Their Reactivity toward CO and CO 2. Organometallics 2018; 37:2217-2221. [PMID: 31080304 PMCID: PMC6503609 DOI: 10.1021/acs.organomet.8b00160] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Indexed: 11/28/2022]
Abstract
![]()
The
unique synthesis and reactivity of [(RPNP*)NiH]
complexes (1a,b), based on metal–ligand
cooperation (MLC), are presented (RPNP* = deprotonated
PNP ligand, R = iPr, tBu). Unexpectedly, the
dearomatized complexes 1a,b were obtained
by reduction of the dicationic complexes [(RPNP)Ni(MeCN)](BF4)2 with sodium amalgam or by reaction of the free
ligand with Ni0(COD)2. Complex 1b reacts with CO via MLC, to give a rare case of a distorted-octahedral
PNP-based pincer complex, the Ni(0) complex 3b. Complexes 1a,b also react with CO2 via MLC to
form a rare example of η1 binding of CO2 to nickel, complexes 4a,b. An unusual
CO2 cleavage process by complex 4b, involving
C–O and C–P cleavage and C–C bond formation,
led to the Ni–CO complex 3b and to the new complex
[(PiPr2NC2O2)Ni(P(O)iPr2)] (5b). All complexes have been
fully characterized by NMR and X-ray crystallography.
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Affiliation(s)
- Dror Oren
- Department of Organic Chemistry and Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Yael Diskin-Posner
- Department of Organic Chemistry and Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Liat Avram
- Department of Organic Chemistry and Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Moran Feller
- Department of Organic Chemistry and Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - David Milstein
- Department of Organic Chemistry and Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
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47
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Palladium-Catalyzed Regioselective Alkoxylation via C-H Bond Activation in the Dihydrobenzo[c]acridine Series. Catalysts 2018. [DOI: 10.3390/catal8040139] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
5,6-Dihydrobenzo[c]acridine belongs to the large aza-polycyclic compound family. Such molecules are not fully planar due to the presence of a partially hydrogenated ring. This paper describes the first Pd-catalyzed alkoxylation via C-H bond activation of variously substituted 5,6-dihydrobenzo[c]acridines. We determined suitable conditions to promote the selective formation of C-O bonds using 10% Pd(OAc)2, PhI(OAc)2 (2 eq.) and MeOH as the best combination of oxidant and solvent, respectively. Under these conditions, 5,6-dihydrobenzo[c]acridines bearing substituents at both rings A and D were successfully functionalized, giving access to polysubstitutited acridine motifs.
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48
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Behnke SL, Manesis AC, Shafaat HS. Spectroelectrochemical investigations of nickel cyclam indicate different reaction mechanisms for electrocatalytic CO2 and H+ reduction. Dalton Trans 2018; 47:15206-15216. [DOI: 10.1039/c8dt02873g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Characterization of a NiIII species during reductive catalysis by [Ni(cyclam)]2+ implicates an ECCE mechanism for hydrogen production in aqueous solution.
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Affiliation(s)
- Shelby L. Behnke
- Department of Chemistry and Biochemistry
- The Ohio State University
- Columbus
- USA
| | | | - Hannah S. Shafaat
- Department of Chemistry and Biochemistry
- The Ohio State University
- Columbus
- USA
- Ohio State Biochemistry Program
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