1
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He Y, Huang YY, Zhu XQ, Su SD, Xu QD, Fu JH, Song Y, Wu XT, Sheng TL. Electronic Transition and Magnetic Coupling Regulation in Trimetallic Complexes Featuring a New Bridging Ligand Obtained by Oxidative Addition. Inorg Chem 2023. [PMID: 37452753 DOI: 10.1021/acs.inorgchem.3c01339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
A series of trimetallic complexes [FeIII(μ-L)(py)]2MII(py)n (n = 2, MII = MnII, 1; FeII, 2; CoII, 3; ZnII, 4; n = 3, MII = CdII, 5) with a new bridging ligand L4- (deprotonated 1,2-N1,N2-bis(2-mercaptoanil) oxalimidic acid) were synthesized and fully characterized by elemental analysis, single-crystal X-ray crystallography, IR, and Mössbauer spectra. Interestingly, the bridging ligand was obtained by oxidative addition of the (gma•)3- ligand from the mononuclear precursor Fe(gma)py (gma = glyoxal-bis(2-mercaptoanil)). In the obtained complexes, the bridging ligand L4- coordinates to the terminal FeIII ions (intermediate-spin with SFe = 3/2) by the N, S atoms, and coordinate to the central metal MII ion by the four O atoms. The resonance structure of the bridging ligand can be described as the two 4π-electron delocalized systems connected by one single-bond (C1-C2), which is different from the electronic structure of the precursor Fe(gma)py. Remarkably, the magnetic coupling interaction can be regulated through the central metal. The ferromagnetic coupling constant J gradually decreases as MII changes from FeII to CoII and MnII, while the paramagnetic behaviors are presented when MII = ZnII and CdII, confirmed by the magnetic susceptibility measurements and further supported by using the PHI program. Furthermore, the bridging ligand to the terminal FeIII charge transfer (LMCT) transitions emerged in all complexes but the central FeII to terminal FeIII charge transfer (MMCT) only presented in complex 2, strongly supported by the UV/vis-NIR electronic spectra and TDDFT calculations.
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Affiliation(s)
- Yong He
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Ying-Ying Huang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Xiao-Quan Zhu
- Department of Criminal Investigation, Fujian Police College, Fuzhou 350007, P. R. China
| | - Shao-Dong Su
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
| | - Qing-Dou Xu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
| | - Jin-Hui Fu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Ying Song
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
| | - Xin-Tao Wu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
| | - Tian-Lu Sheng
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
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2
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The role of tridentate ligands on the redox stability of anticancer gold(III) complexes. J Inorg Biochem 2022; 236:111970. [PMID: 36049259 DOI: 10.1016/j.jinorgbio.2022.111970] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 08/12/2022] [Accepted: 08/13/2022] [Indexed: 12/15/2022]
Abstract
Gold(III) complexes are promising compounds for cancer chemotherapy, whose action depends on their redox stability. In this context, the choice of ligands is crucial to adjust their reactivity and biological response. The present study addressed the effect of the gold coordination sphere on the reduction potential (Eo) for ten gold(III) complexes containing five or six-membered rings tridentate ligands - [AuIII(trident)Cl]3+n (trident = N^N^N, C^N^N, C^C^N, C^N^C, and N^C^N). The calculated Eo covered a broad range of 2500 mV with the most stable complexes containing two AuC bonds (Eo = -1.85 V for [AuIII(C^C^N)Cl] - f). For complexes with one AuC bond, the N^C^N ligands stabilize the gold(III) complex more efficiently than N^N^C; however, the inclusion of the non-innocent ligand bipy (2,2'-bipyridine) in N^N portion provides an extra stabilization effect. Among the derivatives with one AuC bond, [AuIII(N^N^C)Cl]+ (N^N = bipy) (a) showed Eo = -1.20 V. For the complexes with N^N^N ligands, Eo was positive and almost constant (+0.60 V). Furthermore, the kinetics for ligand exchange reactions (Cl-/H2O, H2O/Cys and Cl-/Cys) were monitored for the most stable compounds and the energy profiles compared to the reduction pathways.
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3
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Gradiski MV, Rennie BE, Lough AJ, Morris RH. Electronic insights into aminoquinoline-based PN HN ligands: protonation state dictates geometry while coordination environment dictates N-H acidity and bond strength. Dalton Trans 2022; 51:11241-11254. [PMID: 35731231 DOI: 10.1039/d2dt01556k] [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
A variety of transition metal complexes bearing aminoquinoline PNHH'-R ligands R = Ph (L1H), Cy (L2H) and their amido analogues are reported for rhodium(I) ([Rh(L1H)(PPh3)]+1 and Rh(L1)(PPh3) 2), cobalt(II) (Co(L2)(Cl) 3), and iron(II) ([Fe(L1H)2]2+5, Fe(L1)26, and [Fe(C5Me5)(L1H)]PF67). The acid-base and redox properties of the amido complexes 2, 6, and their protio parent complexes 1, and 5 permit the determination of the pKa and bond dissociation free energy (BDFE) of their N-H bonds while the ligand scaffold is coordinated to metal centres of square planar and octahedral geometry, respectively. From relative concentrations obtained by the use of 31P{1H} NMR spectroscopy, a pKaTHF value of 14 is calculated for rhodium complex 1, 6.4 for iron complex 5, and 24 for iron complex 7. These data, when combined with elecrochemical potentials obtained via cyclic voltammetry, allow the calculations of BDFE values for the N-H bond of 69 kcal mol-1 for 1, and of 55 kcal mol-1 for 5.
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Affiliation(s)
- Matthew V Gradiski
- Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario, M5S 3H6, Canada.
| | - Benjamin E Rennie
- Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario, M5S 3H6, Canada.
| | - Alan J Lough
- Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario, M5S 3H6, Canada.
| | - Robert H Morris
- Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario, M5S 3H6, Canada.
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4
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Phung QM, Muchammad Y, Yanai T, Ghosh A. A DMRG/CASPT2 Investigation of Metallocorroles: Quantifying Ligand Noninnocence in Archetypal 3d and 4d Element Derivatives. JACS AU 2021; 1:2303-2314. [PMID: 34984418 PMCID: PMC8717376 DOI: 10.1021/jacsau.1c00417] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Indexed: 05/03/2023]
Abstract
Hybrid density functional theory (B3LYP) and density matrix renormalization group (DMRG) theory have been used to quantitatively compare the degree of ligand noninnocence (corrole radical character) in seven archetypal metallocorroles. The seven complexes, in decreasing order of corrole noninnocent character, are Mn[Cor]Cl > Fe[Cor]Cl > Fe[Cor](NO) > Mo[Cor]Cl2 > Ru[Cor](NO) ≈ Mn[Cor]Ph ≈ Fe[Cor]Ph ≈ 0, where [Cor] refers to the unsubstituted corrolato ligand. DMRG-based second-order perturbation theory calculations have also yielded detailed excited-state energetics data on the compounds, shedding light on periodic trends involving middle transition elements. Thus, whereas the ground state of Fe[Cor](NO) (S = 0) is best described as a locally S = 1/2 {FeNO}7 unit antiferromagnetically coupled to a corrole A' radical, the calculations confirm that Ru[Cor](NO) may be described as simply {RuNO}6-Cor3-, that is, having an innocent corrole macrocycle. Furthermore, whereas the ferromagnetically coupled S = 1{FeNO}7-Cor•2- state of Fe[Cor](NO) is only ∼17.5 kcal/mol higher than the S = 0 ground state, the analogous triplet state of Ru[Cor](NO) is higher by a far larger margin (37.4 kcal/mol) relative to the ground state. In the same vein, Mo[Cor]Cl2 exhibits an adiabatic doublet-quartet gap of 36.1 kcal/mol. The large energy gaps associated with metal-ligand spin coupling in Ru[Cor](NO) and Mo[Cor]Cl2 reflect the much greater covalent character of 4d-π interactions relative to analogous interactions involving 3d orbitals. As far as excited-state energetics is concerned, DMRG-CASPT2 calculations provide moderate validation for hybrid density functional theory (B3LYP) for qualitative purposes, but underscore the possibility of large errors (>10 kcal/mol) in interstate energy differences.
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Affiliation(s)
- Quan Manh Phung
- Department
of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
- Institute
of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
| | - Yasin Muchammad
- Department
of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
| | - Takeshi Yanai
- Department
of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
- Institute
of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
| | - Abhik Ghosh
- Department
of Chemistry, UiT-The Arctic University
of Norway, N-9037 Tromsø, Norway
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5
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Pokhriyal D, Heins SP, Sifri RJ, Gentekos DT, Coleman RE, Wolczanski PT, Cundari TR, Fors BP, Lancaster KM, MacMillan SN. Reversible C-C Bond Formation, Halide Abstraction, and Electromers in Complexes of Iron Containing Redox-Noninnocent Pyridine-imine Ligands. Inorg Chem 2021; 60:18662-18673. [PMID: 34889590 DOI: 10.1021/acs.inorgchem.1c01815] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The exploration of pyridine-imine (PI) iron complexes that exhibit redox noninnocence (RNI) led to several interesting discoveries. The reduction of (PI)FeX2 species afforded disproportionation products such as (dmpPI)2FeX (dmp = 2,6-Me2-C6H3, X = Cl, Br; 8-X) and (dippPI)2FeX (dipp = 2,6-iPr2-C6H3, X = Cl, Br; 9-X), which were independently prepared by reductions of (PI)FeX2 in the presence of PI. The crystal structure of 8-Br possessed an asymmetric unit with two distinct electromers, species with different electronic GSs: a low-spin (S = 1/2) configuration derived from an intermediate-spin S = 1 core antiferromagnetically (AF) coupled to an S = 1/2 PI ligand, and an S = 3/2 center resulting from a high-spin S = 2 core AF-coupled to an S = 1/2 PI ligand. Calculations were used to energetically compare plausible ground states. Polydentate diazepane-PI (DHPI) ligands were applied to the synthesis of monomeric dihalides (DHPI)FeX2 (X = Cl, 1-Cl2; X = Br, 1-Br2); reduction generated the highly distorted bioctahedral dimers (DHPA)2Fe2X2 ((3-X)2) containing a C-C bond formed from imine coupling; the monomers 1-X2 could be regenerated upon Ph3CX oxidation. Dihalides and their reduced counterparts were subjected to various alkyl halides and methyl methacrylate (MMA), generating polymers with little to no molecular weight control, indicative of simple radical-initiated polymerization.
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Affiliation(s)
- Devika Pokhriyal
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853, United States
| | - Spencer P Heins
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853, United States
| | - Renee J Sifri
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853, United States
| | - Dillon T Gentekos
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853, United States
| | - Rachael E Coleman
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853, United States
| | - Peter T Wolczanski
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853, United States
| | - Thomas R Cundari
- Department of Chemistry, CASCaM, University of North Texas, Denton, Texas 76201, United States
| | - Brett P Fors
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853, United States
| | - Kyle M Lancaster
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853, United States
| | - Samantha N MacMillan
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853, United States
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6
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Doll JS, Regenauer NI, Bothe VP, Wadepohl H, Roşca DA. Redox Activity of Iron Diazine-Diimine Carbonyl and Dinitrogen Complexes: A Comparative Study of the Influence of the Heterocyclic Ring. Inorg Chem 2021; 61:520-532. [PMID: 34913670 DOI: 10.1021/acs.inorgchem.1c03212] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A detailed investigation of the electronic structure of diazinediimine iron complexes and their comparison with the pyridine analogues reveals subtle but important differences, imparted by the supporting heterocycle. In the case of LFe(CO)2 complexes (L = pyrazine- and pyrimidinediimine), the characterization of three available redox states confirmed that whereas the nature of the electron-transfer processes is similar, the differences in π-acidity of the supporting heterocycle significantly affect the redox potentials. The reduction of LFe(CO)2 can yield either a ligand-centered radical (for L = pyrimidine) or a C-C-bonded dimer (for L = pyrazine), supported by a dearomatized core. In the latter case, the C-C bond can be reversibly cleaved oxidatively. Compared to the carbonyl analogues, employing weak-field N2 ligands triggers changes in electronic structure for the neutral and reduced LFe(N2) complexes (L = pyrimidinediimine). En route to the synthesis of the nitrogen complexes, the square-planar LFeCl (L = pyrimidinediimine) was isolated. The monoradical character of the supporting chelate triggers the asymmetric distribution of electron density around the heterocycle.
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Affiliation(s)
- Julianna S Doll
- Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 276, 69120 Heidelberg, Germany
| | - Nicolas I Regenauer
- Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 276, 69120 Heidelberg, Germany
| | - Viktoria P Bothe
- Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 276, 69120 Heidelberg, Germany
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 276, 69120 Heidelberg, Germany
| | - Dragoş-Adrian Roşca
- Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 276, 69120 Heidelberg, Germany
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7
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Kamitani M. Chemically robust and readily available quinoline-based PNN iron complexes: application in C-H borylation of arenes. Chem Commun (Camb) 2021; 57:13246-13258. [PMID: 34812447 DOI: 10.1039/d1cc04877e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Iron catalysts have been used for over a century to produce ammonia industrially. However, the use of iron catalysts generally remained quite limited until relatively recently, when the abundance and low toxicity of iron spurred the development of a variety of iron catalysts. Despite the fact that iron catalysts are being developed as alternatives to precious metal catalysts, their reactivities and stabilities are quite different because of their unique electronic structures. In this context, our group previously developed a new family of quinoline-based PNN pincer-type ligands for low- to mid-valent iron catalysts. These chemically robust PNN ligands provide air- and moisture-tolerant iron complexes, which exhibit excellent catalytic performances in the C-H borylation of arenes. This feature article summarises our recent work on PNN iron complexes, including their conception and design, as well as related reports on iron pincer complexes and iron-catalysed C-H borylation reactions.
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Affiliation(s)
- Masahiro Kamitani
- Department of Chemistry, School of Science, Kitasato University, 1-15-1 Kitazato, Minami-ku, Sagamihara 252-0373, Japan.
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8
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Thenarukandiyil R, Paenurk E, Wong A, Fridman N, Karton A, Carmieli R, Ménard G, Gershoni-Poranne R, de Ruiter G. Extensive Redox Non-Innocence in Iron Bipyridine-Diimine Complexes: a Combined Spectroscopic and Computational Study. Inorg Chem 2021; 60:18296-18306. [PMID: 34787414 PMCID: PMC8653161 DOI: 10.1021/acs.inorgchem.1c02925] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Indexed: 11/28/2022]
Abstract
Metal-ligand cooperation is an important aspect in earth-abundant metal catalysis. Utilizing ligands as electron reservoirs to supplement the redox chemistry of the metal has resulted in many new exciting discoveries. Here, we demonstrate that iron bipyridine-diimine (BDI) complexes exhibit an extensive electron-transfer series that spans a total of five oxidation states, ranging from the trication [Fe(BDI)]3+ to the monoanion [Fe(BDI]-1. Structural characterization by X-ray crystallography revealed the multifaceted redox noninnocence of the BDI ligand, while spectroscopic (e.g., 57Fe Mössbauer and EPR spectroscopy) and computational studies were employed to elucidate the electronic structure of the isolated complexes, which are further discussed in this report.
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Affiliation(s)
- Ranjeesh Thenarukandiyil
- Schulich
Faculty of Chemistry, Technion −
Israel Institute of Technology, Technion City, 3200008 Haifa, Israel
| | - Eno Paenurk
- Laboratorium
für Organische Chemie, ETH Zurich, Vladimir-Prelog-Weg 2, Zurich 8093, Switzerland
| | - Anthony Wong
- Department
of Chemistry and Biochemistry, University
of California, Santa
Barbara, California 93106, United States
| | - Natalia Fridman
- Schulich
Faculty of Chemistry, Technion −
Israel Institute of Technology, Technion City, 3200008 Haifa, Israel
| | - Amir Karton
- School
of Molecular Science, The University of
Western Australia, 35 Stirling Highway, 6009 Perth, Australia
| | - Raanan Carmieli
- Department
of Chemical Research Support, Weizmann Institute
of Science, Rehovot 761000, Israel
| | - Gabriel Ménard
- Department
of Chemistry and Biochemistry, University
of California, Santa
Barbara, California 93106, United States
| | - Renana Gershoni-Poranne
- Schulich
Faculty of Chemistry, Technion −
Israel Institute of Technology, Technion City, 3200008 Haifa, Israel
- Laboratorium
für Organische Chemie, ETH Zurich, Vladimir-Prelog-Weg 2, Zurich 8093, Switzerland
| | - Graham de Ruiter
- Schulich
Faculty of Chemistry, Technion −
Israel Institute of Technology, Technion City, 3200008 Haifa, Israel
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9
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Glatz M, Gorgas N, Stöger B, Pittenauer E, Ferreira L, Veiros LF, Calhorda MJ, Kirchner K. Structural and Electronic Properties of Iron(0) PNP Pincer Complexes. Z Anorg Allg Chem 2021; 647:1429-1435. [PMID: 34413550 PMCID: PMC8360027 DOI: 10.1002/zaac.202100015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 02/16/2021] [Indexed: 11/06/2022]
Abstract
In the present work we have prepared and fully characterized several Fe(0) complexes of the type [Fe(PNP)(CO)2] treating Fe(II) complexes [Fe(PNP)(Cl)2] with KC8 in the presence of carbon monoxide. While complexes [Fe(PNPNMe-iPr)(CO)2], [Fe(PNPNEt-iPr)(CO)2] adopt a trigonal bipyramidal geometry, the bulkier and more electron rich [Fe(PNPNH-tBu)(CO)2] is closer to a square pyramidal geometry. Mössbauer spectra showed isomer shifts very close to 0 and similar to those reported for Fe(I) systems. Quadrupole splitting values range between 2.2 and 2.7 mm s-1 both in experiments and DFT calculations, while those of Fe(I) complexes are much smaller (∼0.6 mm s-1).
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Affiliation(s)
- Mathias Glatz
- Institute of Applied Synthetic ChemistryVienna University of TechnologyGetreidemarkt 9/163-AC1060ViennaAustria
| | - Nikolaus Gorgas
- Institute of Applied Synthetic ChemistryVienna University of TechnologyGetreidemarkt 9/163-AC1060ViennaAustria
| | - Berthold Stöger
- X-ray CenterVienna University of TechnologyGetreidemarkt 9/163-OC1060ViennaAustria
| | - Ernst Pittenauer
- Institute of Chemical Technologies and AnalyticsVienna University of TechnologyGetreidemarkt 9A-1060ViennaAustria
| | - Liliana Ferreira
- Department of PhysicsUniversity of Coimbra3004-516CoimbraPortugal
- BioISI-Biosystems and Integrative Sciences InstituteFaculdade de CiênciasUniversidade de Lisboa1749-016LisboaPortugal
| | - Luis F. Veiros
- Centro de Química Estrutural and Departamento de Engenharia QuímicaInstituto Superior TécnicoUniversidade de LisboaAv Rovisco Pais1049-001LisboaPortugal
| | - Maria José Calhorda
- BioISI-Biosystems and Integrative Sciences InstituteFaculdade de CiênciasUniversidade de Lisboa1749-016LisboaPortugal
| | - Karl Kirchner
- Institute of Applied Synthetic ChemistryVienna University of TechnologyGetreidemarkt 9/163-AC1060ViennaAustria
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10
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Thenarukandiyil R, Satheesh V, Shimon LJW, de Ruiter G. Hydroboration of Nitriles, Esters, and Carbonates Catalyzed by Simple Earth-Abundant Metal Triflate Salts. Chem Asian J 2021; 16:999-1006. [PMID: 33728809 DOI: 10.1002/asia.202100003] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Revised: 03/10/2021] [Indexed: 11/11/2022]
Abstract
During the past decade earth-abundant metals have become increasingly important in homogeneous catalysis. One of the reactions in which earth-abundant metals have found important applications is the hydroboration of unsaturated C-C and C-X bonds (X=O or N). Within these set of transformations, the hydroboration of challenging substrates such as nitriles, carbonates and esters still remain difficult and often relies on elaborate ligand designs and highly reactive catalysts (e. g., metal alkyls/hydrides). Here we report an effective methodology for the hydroboration of challenging C≡N and C=O bonds that is simple and applicable to a wide set of substrates. The methodology is based on using a manganese(II) triflate salt that, in combination with commercially available potassium tert-butoxide and pinacolborane, catalyzes the hydroboration of nitriles, carbonates, and esters at room temperature and with near quantitative yields in less than three hours. Additional studies demonstrated that other earth-abundant metal triflate salts can facilitate this reaction as well, which is further discussed in this report.
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Affiliation(s)
- Ranjeesh Thenarukandiyil
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Technion City, 3200008, Haifa, Israel
| | - Vanaparthi Satheesh
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Technion City, 3200008, Haifa, Israel
| | - Linda J W Shimon
- Department of Chemical Research Support, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Graham de Ruiter
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Technion City, 3200008, Haifa, Israel
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11
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Dawe LN, Karimzadeh-Younjali M, Dai Z, Khaskin E, Gusev DG. The Milstein Bipyridyl PNN Pincer Complex of Ruthenium Becomes a Noyori-Type Catalyst under Reducing Conditions. J Am Chem Soc 2020; 142:19510-19522. [DOI: 10.1021/jacs.0c06518] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Louise N. Dawe
- Department of Chemistry and Biochemistry, Wilfrid Laurier University, Waterloo, ON N2L 3C5, Canada
| | | | - Zengjin Dai
- Department of Chemistry and Biochemistry, Wilfrid Laurier University, Waterloo, ON N2L 3C5, Canada
| | - Eugene Khaskin
- Okinawa Institute of Science and Technology, Okinawa 904-0495, Japan
| | - Dmitry G. Gusev
- Department of Chemistry and Biochemistry, Wilfrid Laurier University, Waterloo, ON N2L 3C5, Canada
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12
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Jhulki L, Purkait R, Kisan H, Bertolasi V, Isab A, Sinha C, Dinda J. A promising class of luminescent derivatives of Silver(I) and Gold(I)‐
N
‐heterocyclic carbene. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5673] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Lalmohan Jhulki
- Department of Applied Science Haldia Institute of Technology Haldia West Bengal 721657 India
| | - Rakesh Purkait
- Department of Chemistry Jadavpur University Kolkata West Bengal 700032 India
| | - HemantaK. Kisan
- Department of Chemistry Utkal University Vani Vihar Bhubaneswar Odisha 751004 India
| | - Valerio Bertolasi
- Dipartimento di Scienze Chimiche e Farmaceutiche, Centro di Strutturistica Diffrattometrica Universita' di Ferrara Via L.Borsari, 46 Italy
| | - AnvarhuseinA. Isab
- Department of Chemistry King Fahd University of Petroleum and Minerals Dhahran 31261 Saudi Arabia
| | - Chittaranjan Sinha
- Department of Chemistry Jadavpur University Kolkata West Bengal 700032 India
| | - Joydev Dinda
- Department of Chemistry Utkal University Vani Vihar Bhubaneswar Odisha 751004 India
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13
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Regenauer NI, Settele S, Bill E, Wadepohl H, Roşca DA. Bis(imino)pyrazine-Supported Iron Complexes: Ligand-Based Redox Chemistry, Dearomatization, and Reversible C-C Bond Formation. Inorg Chem 2020; 59:2604-2612. [PMID: 31990534 DOI: 10.1021/acs.inorgchem.9b03665] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Iron complexes supported by novel π-acidic bis(imino)pyrazine (PPzDI) ligands can be functionalized at the nonligated nitrogen atom, and this has a marked effect on the redox properties of the resulting complexes. Dearomatization is observed in the presence of cobaltocene, which reversibly reduces the pyrazine core and not the imine functionality, as observed in the case of the pyridinediimine-ligated iron analogues. The resulting ligand-based radical is prone to dimerization through the formation of a long carbon-carbon bond, which can be subsequently cleaved under mild oxidative conditions.
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Affiliation(s)
- Nicolas I Regenauer
- Anorganisch-Chemisches Institut , Universität Heidelberg , Im Neuenheimer Feld 276 , 69120 Heidelberg , Germany
| | - Simon Settele
- Anorganisch-Chemisches Institut , Universität Heidelberg , Im Neuenheimer Feld 276 , 69120 Heidelberg , Germany
| | - Eckhard Bill
- Max-Planck-Institut für Chemische Energiekonversion , Stiftstraße 24-36 , 45470 Mülheim/Ruhr , Germany
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut , Universität Heidelberg , Im Neuenheimer Feld 276 , 69120 Heidelberg , Germany
| | - Dragoş-Adrian Roşca
- Anorganisch-Chemisches Institut , Universität Heidelberg , Im Neuenheimer Feld 276 , 69120 Heidelberg , Germany
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14
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Sheet D, Bera A, Fu Y, Desmecht A, Riant O, Hermans S. Carbon‐Nanotube‐Appended PAMAM Dendrimers Bearing Iron(II) α‐Keto Acid Complexes: Catalytic Non‐Heme Oxygenase Models. Chemistry 2019; 25:9191-9196. [DOI: 10.1002/chem.201901735] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 05/13/2019] [Indexed: 01/20/2023]
Affiliation(s)
- Debobrata Sheet
- Institute of Condensed Matter and Nanosciences/Molecular Chemistry, Materials and Catalysis (IMCN/MOST)UCLouvain Place Louis Pasteur 1 1348 Louvain-la-Neuve Belgium
- Department of ChemistryPresidency University, 86/1 College Street Kolkata 700073 India
| | - Abhijit Bera
- School of Chemical SciencesIndian Association for the Cultivation of Sciences 2A & 2B Raja S C Mullick Road Kolkata 700032 India
| | - Yang Fu
- Institute of Condensed Matter and Nanosciences/Molecular Chemistry, Materials and Catalysis (IMCN/MOST)UCLouvain Place Louis Pasteur 1 1348 Louvain-la-Neuve Belgium
| | - Antonin Desmecht
- Institute of Condensed Matter and Nanosciences/Molecular Chemistry, Materials and Catalysis (IMCN/MOST)UCLouvain Place Louis Pasteur 1 1348 Louvain-la-Neuve Belgium
| | - Olivier Riant
- Institute of Condensed Matter and Nanosciences/Molecular Chemistry, Materials and Catalysis (IMCN/MOST)UCLouvain Place Louis Pasteur 1 1348 Louvain-la-Neuve Belgium
| | - Sophie Hermans
- Institute of Condensed Matter and Nanosciences/Molecular Chemistry, Materials and Catalysis (IMCN/MOST)UCLouvain Place Louis Pasteur 1 1348 Louvain-la-Neuve Belgium
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15
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Katari M, Carmichael D, Jacquemin D, Frison G. Structure of Electronically Reduced N-Donor Bidentate Ligands and Their Heteroleptic Four-Coordinate Zinc Complexes: A Survey of Density Functional Theory Results. Inorg Chem 2019; 58:7169-7179. [PMID: 31117621 DOI: 10.1021/acs.inorgchem.8b03549] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The role of Hartree-Fock exchange in describing the structural changes occurring upon reduction of bipyridine-based ligands and their complexes is investigated within the framework of density functional theory (DFT) calculations. A set of four free ligands in their neutral and radical anionic forms, and two of their zinc complexes in their dicationic and monocationic radical forms, is used to compare a large panel of pure, conventional, and long-range corrected hybrid DFT functionals; coupled cluster single and double calculations are used alongside experimental results as benchmarks. Particular attention has been devoted to the magnitude of the change, upon reduction, of the Δ-parameter, which measures the difference between the Cpy-Cpy and the C-N bond lengths in bipyridine ligand and is known to experimentally correlate with the charge of the ligands. Our results indicate that the structural changes significantly depend on the amount of exact exchange included in the functional. A progressive evolution is observed for the free ligands, whereas two distinct sets of results are obtained for the complexes. Functionals with a small degree of HF exchange, e.g., B3LYP, do not adequately describe geometric changes for the considered species, and, quite surprisingly, the same holds for the CC2 method. The best agreement to experimental and CCSD values is obtained with functionals that include a significant but not excessive part of exact exchange, e.g., CAM-B3LYP, M06-2X, and ωB97X-D. The calculated localization of the added electron after reduction, which depends on the self-interaction error, is used to rationalize these outcomes. Static correlation is also shown to play a role in the accurate description of the electronic structure.
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Affiliation(s)
| | - Duncan Carmichael
- LCM, CNRS, Ecole Polytechnique , IP Paris , F-91128 Palaiseau , France
| | - Denis Jacquemin
- University of Nantes , CNRS, CEISAM (UMR 6230), 2 chemin de la Houssinière , 44322 Nantes , Cedex 03 , France
| | - Gilles Frison
- LCM, CNRS, Ecole Polytechnique , IP Paris , F-91128 Palaiseau , France
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16
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Gradiski MV, Tsui BTH, Lough AJ, Morris RH. PNN′ & P2NN′ ligands via reductive amination with phosphine aldehydes: synthesis and base-metal coordination chemistry. Dalton Trans 2019; 48:2150-2159. [DOI: 10.1039/c8dt04058c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Phosphorus-donor “arms” are readily added to amines in order to enable sturdy base metal coordination.
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Affiliation(s)
| | | | - Alan J. Lough
- Department of Chemistry
- University of Toronto
- Toronto
- Canada
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17
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Alig L, Fritz M, Schneider S. First-Row Transition Metal (De)Hydrogenation Catalysis Based On Functional Pincer Ligands. Chem Rev 2018; 119:2681-2751. [PMID: 30596420 DOI: 10.1021/acs.chemrev.8b00555] [Citation(s) in RCA: 488] [Impact Index Per Article: 81.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The use of 3d metals in de/hydrogenation catalysis has emerged as a competitive field with respect to "traditional" precious metal catalyzed transformations. The introduction of functional pincer ligands that can store protons and/or electrons as expressed by metal-ligand cooperativity and ligand redox-activity strongly stimulated this development as a conceptual starting point for rational catalyst design. This review aims at providing a comprehensive picture of the utilization of functional pincer ligands in first-row transition metal hydrogenation and dehydrogenation catalysis and related synthetic concepts relying on these such as the hydrogen borrowing methodology. Particular emphasis is put on the implementation and relevance of cooperating and redox-active pincer ligands within the mechanistic scenarios.
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Affiliation(s)
- Lukas Alig
- Universität Göttingen , Institut für Anorganische Chemie , Tammannstrasse 4 , D-37077 Göttingen , Germany
| | - Maximilian Fritz
- Universität Göttingen , Institut für Anorganische Chemie , Tammannstrasse 4 , D-37077 Göttingen , Germany
| | - Sven Schneider
- Universität Göttingen , Institut für Anorganische Chemie , Tammannstrasse 4 , D-37077 Göttingen , Germany
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18
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Takeshita T, Sato K, Nakajima Y. Selective hydrosiloxane synthesis via dehydrogenative coupling of silanols with hydrosilanes catalysed by Fe complexes bearing a tetradentate PNNP ligand. Dalton Trans 2018; 47:17004-17010. [PMID: 30460962 DOI: 10.1039/c8dt04168g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A well-defined iron complex system was established using PNNP-R (R = Ph and Cy) as a strong σ-donating ligand with a rigid meridional tetradentate structure. Reactive Fe(0) complexes [{Fe(PNNP-R)}2(μ-N2)] were synthesized by a reaction of the corresponding iron dihalide with NaBEt3H and structurally characterized. The reaction proceeded via the iron dihydride intermediate [Fe(H)2(PNNP-R)], which underwent H2 reductive elimination, supporting the hemilabile behavior of PNNP-R. [{Fe(PNNP-R)}2(μ-N2)] catalyzed the dehydrogenative coupling of silanols with silanes to selectively form various hydrosiloxanes, which are important building blocks for the synthesis of a range of siloxane compounds. This system exhibited higher catalytic efficiency than the previously reported precious-metal-catalyzed systems.
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Affiliation(s)
- Tomohiro Takeshita
- Interdisciplinary Research Centre for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan. and Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8571, Japan
| | - Kazuhiko Sato
- Interdisciplinary Research Centre for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
| | - Yumiko Nakajima
- Interdisciplinary Research Centre for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan. and Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8571, Japan
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19
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Popov IA, Mehio N, Chu T, Davis BL, Mukundan R, Yang P, Batista ER. Impact of Ligand Substitutions on Multielectron Redox Properties of Fe Complexes Supported by Nitrogenous Chelates. ACS OMEGA 2018; 3:14766-14778. [PMID: 31458151 PMCID: PMC6643937 DOI: 10.1021/acsomega.8b01921] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 08/17/2018] [Indexed: 06/10/2023]
Abstract
Redox flow batteries (RFBs) have recently been recognized as a potentially viable technology for scalable energy storage. To take full advantage of RFBs, one possible approach for achieving high energy densities is to maximize a number of redox events by utilizing charge carriers capable of multiple one-electron transfers within the electrochemical window of solvent. However, past efforts to develop more efficient electrolytes for nonaqueous RFBs have mostly been empirical. In this manuscript, we shed light on design principles by theoretically investigating the effects of systematically substituting pyridyl moieties with imine ligands within a series of Fe complexes with some experimental validation. We found that such replacement is an effective strategy for reducing the molecular weight-to-charge ratios of these complexes. Simultaneously, calculations suggest that the reduction potentials and ligand-based redox activity of such substituted N-heterocyclic Fe compounds might be maintained within their +4 → -1 charge states. Additionally, by theoretically examining the role of coordination geometry, vis-à-vis reducing the number of redox noninnocent ligands within the first coordination sphere, we have demonstrated that Fe complexes with one such ligand were also capable of supporting multielectron reduction events and exhibited reduction potentials similar to their parent analogs supported by two or three of the same multidentate ligands. However, some differences in redox nature within the lower (+2 → -1) charge states were also noticed. Specifically, complexes containing two bidentate ligands, or one tridentate ligand, exhibited ligand-based reductions, whereas compounds with one bidentate ligand exhibited metal-centered reductions. The current results pave the way toward the design of the next-generation of Fe complexes with lower molecular weights and greater stored energy for redox flow batteries.
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Affiliation(s)
- Ivan A. Popov
- Theoretical
Division, , and Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Nada Mehio
- Theoretical
Division, , and Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Terry Chu
- Theoretical
Division, , and Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Benjamin L. Davis
- Theoretical
Division, , and Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Rangachary Mukundan
- Theoretical
Division, , and Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Ping Yang
- Theoretical
Division, , and Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Enrique R. Batista
- Theoretical
Division, , and Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
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20
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Sinha V, Pribanic B, de Bruin B, Trincado M, Grützmacher H. Ligand- and Metal-Based Reactivity of a Neutral Ruthenium Diolefin Diazadiene Complex: The Innocent, the Guilty and the Suspicious. Chemistry 2018; 24:5513-5521. [PMID: 29341297 PMCID: PMC5947567 DOI: 10.1002/chem.201705957] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Indexed: 11/17/2022]
Abstract
Coordination of the diazadiene diolefin ligand (trop2 dad) to ruthenium leads to various complexes of composition [Ru(trop2 dad)(L)]. DFT studies indicate that the closed-shell singlet (CSS), open-shell singlet (OSS), and triplet electronic structures of this species are close in energy, with the OSS spin configuration being the lowest in energy for all tested functionals. Singlet-state CASSCF calculations revealed a significant multireference character for these complexes. The closed-shell singlet wavefunction dominates, but these complexes have a significant (≈8-16 %) open-shell singlet [d7 -RuI (L)(trop2 dad.- )] contribution mixed into the ground state. In agreement with their ambivalent electronic structure, these complexes reveal both metal- and ligand-centered reactivity. Most notable are the reactions with AdN3 , diazomethane, and a phosphaalkyne leading to scission of the C-C bond of the diazadiene (dad) moiety of the trop2 dad ligand, resulting in net (formal) nitrene, carbene, or P≡C insertion in the dad C-C bond, respectively. Supporting DFT studies revealed that several of the ligand-based reactions proceed via low-barrier radical-type pathways, involving the dad.- ligand radical character of the OSS or triplet species.
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Affiliation(s)
- Vivek Sinha
- Supramolecular and Homogeneous Catalysis GroupVan 't Hoff Institute for Molecular Sciences (HIMS)University of AmsterdamScience park 9041098XHAmsterdamThe Netherlands
| | - Bruno Pribanic
- Department of Chemistry and Applied Biosciences ETH ZürichLaboratory of Inorganic ChemistryVladimir-Prelog-Weg 1ZürichCH-8093Switzerland
| | - Bas de Bruin
- Supramolecular and Homogeneous Catalysis GroupVan 't Hoff Institute for Molecular Sciences (HIMS)University of AmsterdamScience park 9041098XHAmsterdamThe Netherlands
| | - Monica Trincado
- Department of Chemistry and Applied Biosciences ETH ZürichLaboratory of Inorganic ChemistryVladimir-Prelog-Weg 1ZürichCH-8093Switzerland
| | - Hansjörg Grützmacher
- Department of Chemistry and Applied Biosciences ETH ZürichLaboratory of Inorganic ChemistryVladimir-Prelog-Weg 1ZürichCH-8093Switzerland
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21
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Anwar MU, Al-Harrasi A, Gavey EL, Pilkington M, Rawson JM, Thompson LK. A new nitrogen rich open chain diazine ligand system: synthesis coordination chemistry and magneto-structural studies. Dalton Trans 2018; 47:2511-2521. [PMID: 29302666 DOI: 10.1039/c7dt03845c] [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
The synthesis and coordination chemistry of a new series of open chain diazine based ligands (L3aH2, L3bH2, and L3cH2) is reported. The ligands comprise a central disubstituted bipyridine moiety with two bridging alkoxide oxygen donors, together with diazine and pyridine terminal groups strategically located to coordinate three metal centres. Reactions of L3aH2 and L3bH2 with CuX2 (X- = ClO4, Cl, NO3) yield a trinuclear complex (1) and 1-D copper chains (2, 3). In these complexes the ligands bind copper ions via Nbipyridne, trans Ndiazine, Ohydrazone, and Npyridne donors while vacant sites are occupied by counter ions or solvent molecules (methanol, water, acetonitrile). Reaction of L3cH2 with MnCl2 affords a linear trinuclear Mn complex (4), where the Mn(ii) ions are connected via μ2-Ohydrazone linkers with no N-N bridging. Reaction of L3aH2 with Fe(SO3CF3)2 yields a tetranuclear mixed valence Fe complex (5), in which both trans N-N and Ohydrazone bridging is observed. Magnetic studies reveal the presence of moderate to strong antiferromagnetic interactions in complexes 1-4 while a mix of ferromagnetic and antiferromagnetic interactions is observed in complex 5.
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Affiliation(s)
- Muhammad U Anwar
- University of Nizwa, Chair of Oman's Medicinal Plants and Marine Natural Products, P O Box 33, PC 616, Birkat Almouz., Nizwa, Oman.
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22
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Polezhaev AV, Liss CJ, Telser J, Chen C, Caulton KG. A PNNH Pincer Ligand Allows Access to Monovalent Iron. Chemistry 2017; 24:1330-1341. [DOI: 10.1002/chem.201703795] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Indexed: 12/21/2022]
Affiliation(s)
| | - Cameron J. Liss
- Department of Biological, Chemical, and Physical Sciences Roosevelt University 430 S. Michigan Ave Chicago Illinois 60605 USA
| | - Joshua Telser
- Department of Biological, Chemical, and Physical Sciences Roosevelt University 430 S. Michigan Ave Chicago Illinois 60605 USA
| | - Chun‐Hsing Chen
- Department of Chemistry Indiana University Bloomington 47405 Bloomington IN USA
| | - Kenneth G. Caulton
- Department of Chemistry Indiana University Bloomington 47405 Bloomington IN USA
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23
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Ortuño MA, Cramer CJ. Multireference Electronic Structures of Fe–Pyridine(diimine) Complexes over Multiple Oxidation States. J Phys Chem A 2017; 121:5932-5939. [DOI: 10.1021/acs.jpca.7b06032] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Manuel A. Ortuño
- Department of Chemistry,
Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Christopher J. Cramer
- Department of Chemistry,
Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
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24
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Polezhaev AV, Chen CH, Kinne AS, Cabelof AC, Lord RL, Caulton KG. Ligand Design toward Multifunctional Substrate Reductive Transformations. Inorg Chem 2017; 56:9505-9514. [DOI: 10.1021/acs.inorgchem.7b00785] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alexander V. Polezhaev
- Department of Chemistry, Indiana University—Bloomington, Bloomington, Indiana 47405, United States,
| | - Chun-Hsing Chen
- Department of Chemistry, Indiana University—Bloomington, Bloomington, Indiana 47405, United States,
| | - Adam S. Kinne
- Department of Chemistry, Indiana University—Bloomington, Bloomington, Indiana 47405, United States,
| | - Alyssa C. Cabelof
- Department of Chemistry, Grand Valley State University, Allendale, Michigan 49401, United States
| | - Richard L. Lord
- Department of Chemistry, Grand Valley State University, Allendale, Michigan 49401, United States
| | - Kenneth G. Caulton
- Department of Chemistry, Indiana University—Bloomington, Bloomington, Indiana 47405, United States,
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25
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Schäfer S, Gamer MT, Lebedkin S, Weigend F, Kappes MM, Roesky PW. Bis(6-methylene-2,2′-bipyridine)phenylphosphine-A Flexible Ligand for the Construction of Trinuclear Coinage-Metal Complexes. Chemistry 2017; 23:12198-12209. [DOI: 10.1002/chem.201701091] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Sebastian Schäfer
- Institute of Inorganic Chemistry; Karlsruhe Institute of Technology (KIT); Engesserstraße 15 76131 Karlsruhe Germany
| | - Michael T. Gamer
- Institute of Inorganic Chemistry; Karlsruhe Institute of Technology (KIT); Engesserstraße 15 76131 Karlsruhe Germany
| | - Sergei Lebedkin
- Institute of Nanotechnology; Karlsruhe Institute of Technology (KIT); Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Florian Weigend
- Institute of Nanotechnology; Karlsruhe Institute of Technology (KIT); Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
- Institute of Physical Chemistry; Karlsruhe Institute of Technology (KIT); Fritz-Haber Weg 2 76131 Karlsruhe Germany
| | - Manfred M. Kappes
- Institute of Nanotechnology; Karlsruhe Institute of Technology (KIT); Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
- Institute of Physical Chemistry; Karlsruhe Institute of Technology (KIT); Fritz-Haber Weg 2 76131 Karlsruhe Germany
| | - Peter W. Roesky
- Institute of Inorganic Chemistry; Karlsruhe Institute of Technology (KIT); Engesserstraße 15 76131 Karlsruhe Germany
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26
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Poddel'sky AI, Druzhkov NO, Fukin GK, Cherkasov VK, Abakumov GA. Bifunctional iminopyridino-catechol and its o-quinone: Synthesis and investigation of coordination abilities. Polyhedron 2017. [DOI: 10.1016/j.poly.2016.12.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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27
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Peters GM, Winegrad JB, Gau MR, Imler GH, Xu B, Ren S, Wayland BB, Zdilla MJ. Synthesis and Structure of 2,5-Bis[N-(2,6-mesityl)iminomethyl]pyrrolylcobalt(II): Evidence for One-Electron-Oxidized, Redox Noninnocent Ligand Behavior. Inorg Chem 2017; 56:3377-3385. [DOI: 10.1021/acs.inorgchem.6b02898] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Garvin M. Peters
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
| | - Jacob B. Winegrad
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
| | - Michael R. Gau
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
| | - Gregory H. Imler
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
| | - Beibei Xu
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
| | - Shenqiang Ren
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
| | - Bradford B. Wayland
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
| | - Michael J. Zdilla
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
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28
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Anwar MU, Rawson JM, Gavey EL, Pilkington M, Al-Harrasi A, Thompson LK. Synthesis, characterization and magnetic studies on mono-, di-, and tri-nuclear Cu(ii) complexes of a new versatile diazine ligand. Dalton Trans 2017; 46:2105-2113. [PMID: 28154875 DOI: 10.1039/c6dt04794g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and coordination chemistry of a new open-chain diazine ligand (L4H2) containing bipyridine, oxime and hydrazone functionalities is reported. Reaction of L4H2 with CuCl2·2H2O affords the mononuclear complex [Cu(L4H2)Cl2] (1) in which the ligand acts as a neutral tridentate N,N',N'' donor, whereas treatment with a large excess of CuCl2·2H2O affords the dinuclear complex [Cu2(L4H)Cl3(CH3OH)(H2O)] (2) in which the ligand is singly-deprotonated at the diazine, offering N,N',N'' and N,N' donor sets to two Cu(ii) ions. Reaction with Cu(NO3)2·3H2O yields the trinuclear complex, [Cu3(L4H)2(CH3OH)4(NO3)4] (3) in which the ligand is again singly deprotonated, but now presents a tetradentate N,N',N'',N'''-donor set to the first Cu(ii) and behaves as an N,O-chelate to a second Cu(ii), with a conformational change from cis to trans at the diazine moiety. When the latter reaction is repeated in the presence of a mild base, a second trinuclear complex is isolated, [Cu3(L4)2(CH3CH2OH)](NO3)2 (4) in which both the diazine and oxime functionalities of the ligand are deprotonated which subsequently bridges all three Cu(ii) ions, acting as an N,N',N'' donor to the first Cu(ii), a N,N' donor to a second Cu(ii) (similar to 2) and as a terminal O-donor to a third Cu(ii) ion. The Cu(ii) ions are linked mutually cis via the two-atom diazine bridge in the case of 2 and 4 and trans in the case of 3. Magnetic studies reveal the presence of weak ferromagnetic interactions in 2 (g = 2.2, J/k = +12.8 K) and strong antiferromagnetic interactions in both 3 and 4 (g = 2.093 J/k = -140 K and g = 2.24 J/k = -300 K respectively).
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Affiliation(s)
- Muhammad U Anwar
- University of Nizwa, Chair of Oman's Medicinal Plants and Marine Natural Products, P O Box 33, PC 616, Birkat Almouz, Nizwa, Oman. and Department of Chemistry and Biochemsitry, University of Windsor, 401 Sunset ave, Windsor, ON N9B3P4, Canada.
| | - Jeremy M Rawson
- Department of Chemistry and Biochemsitry, University of Windsor, 401 Sunset ave, Windsor, ON N9B3P4, Canada.
| | - Emma L Gavey
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Cathaerines, ON L2S3A1, Canada
| | - Melanie Pilkington
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Cathaerines, ON L2S3A1, Canada
| | - Ahmed Al-Harrasi
- University of Nizwa, Chair of Oman's Medicinal Plants and Marine Natural Products, P O Box 33, PC 616, Birkat Almouz, Nizwa, Oman.
| | - Laurence K Thompson
- Deptartment of Chemistry, Memorial University, St. John's, Newfoundland A1B 3X7, Canada
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29
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Danopoulos AA, Braunstein P, Monakhov KY, van Leusen J, Kögerler P, Clémancey M, Latour JM, Benayad A, Tromp M, Rezabal E, Frison G. Heteroleptic, two-coordinate [M(NHC){N(SiMe 3) 2}] (M = Co, Fe) complexes: synthesis, reactivity and magnetism rationalized by an unexpected metal oxidation state. Dalton Trans 2017; 46:1163-1171. [PMID: 28054058 DOI: 10.1039/c6dt03565e] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The linear, two-coordinate and isostructural heteroleptic [M(IPr){N(SiMe3)2}] (IPr = 1,3-bis(diisopropylphenyl)-imidazol-2-ylidene), formally MI complexes (M = Co, 3; Fe, 4) were obtained by the reduction of [M(IPr)Cl{N(SiMe3)2}] with KC8, or [Co(IPr){N(SiMe3)2}2] with mes*PH2, mes* = 2,4,6-tBu3C6H2. The magnetism of 3 and 4 implies CoII and FeII centres coupled to one ligand-delocalized electron, in line with XPS and XANES data; the ac susceptibility of 4 detected a pronounced frequency dependence due to slow magnetization relaxation. Reduction of [Fe(IPr)Cl{N(SiMe3)2}] with excess KC8 in toluene gave the heteronuclear 'inverse-sandwich' Fe-K complex 7, featuring η6-toluene sandwiched between one Fe0 and one K+ centre.
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Affiliation(s)
- Andreas A Danopoulos
- Institute for Advanced Study (USIAS), Université de Strasbourg, 67081 Strasbourg Cedex, France. and Université de Strasbourg, CNRS, CHIMIE UMR 7177, Laboratoire de Chimie de Coordination, Institut de Chimie, 4 rue Blaise Pascal, 67081 Strasbourg Cedex, France.
| | - Pierre Braunstein
- Université de Strasbourg, CNRS, CHIMIE UMR 7177, Laboratoire de Chimie de Coordination, Institut de Chimie, 4 rue Blaise Pascal, 67081 Strasbourg Cedex, France.
| | - Kirill Yu Monakhov
- Institut für Anorganische Chemie, RWTH Aachen University, 52074 Aachen, Germany.
| | - Jan van Leusen
- Institut für Anorganische Chemie, RWTH Aachen University, 52074 Aachen, Germany.
| | - Paul Kögerler
- Institut für Anorganische Chemie, RWTH Aachen University, 52074 Aachen, Germany. and Jülich-Aachen Research Alliance (JARA-FIT) and Peter Grünberg Institute 6, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Martin Clémancey
- Laboratoire de Chimie et Biologie des Métaux, Equipe de Physicochimie des Métaux en Biologie, UMR 5249 CNRS/CEA-DRF-BIG/Université Grenoble-Alpes, 17 rue des Martyrs, Grenoble 38054, France
| | - Jean-Marc Latour
- Laboratoire de Chimie et Biologie des Métaux, Equipe de Physicochimie des Métaux en Biologie, UMR 5249 CNRS/CEA-DRF-BIG/Université Grenoble-Alpes, 17 rue des Martyrs, Grenoble 38054, France
| | - Anass Benayad
- CEA/DRT/LITEN/DTNM/SEN/L2N, 38054 Grenoble Cedex 9, France
| | - Moniek Tromp
- Van't Hoff Institute for Molecular Sciences, Sustainable Materials Characterisation, University of Amsterdam, Amsterdam, The Netherlands
| | - Elixabete Rezabal
- LCM, CNRS, Ecole Polytechnique, Université Paris-Saclay, 91128 Palaiseau, France
| | - Gilles Frison
- LCM, CNRS, Ecole Polytechnique, Université Paris-Saclay, 91128 Palaiseau, France
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30
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Xie ZL, Durgaprasad G, Ali AK, Rose MJ. Substitution reactions of iron(ii) carbamoyl-thioether complexes related to mono-iron hydrogenase. Dalton Trans 2017; 46:10814-10829. [DOI: 10.1039/c7dt01696d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A C,N,S pincer complex has been synthesized for structural modeling of the organometallic active site of mono-[Fe] hydrogenase (HMD).
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Affiliation(s)
- Zhu-Lin Xie
- Department of Chemistry
- The University of Texas at Austin
- Austin
- USA
| | | | - Azim K. Ali
- Department of Chemistry
- The University of Texas at Austin
- Austin
- USA
| | - Michael J. Rose
- Department of Chemistry
- The University of Texas at Austin
- Austin
- USA
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31
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Simler T, Danopoulos AA, Braunstein P. Non-symmetrical, potentially redox non-innocent imino NHC pyridine ‘pincers’ via a zinc ion template-assisted synthesis. Dalton Trans 2017; 46:5955-5964. [DOI: 10.1039/c7dt01014a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A ZnII-promoted modular synthesis allows access to new non-symmetrical, redox-active imino NHC pyridine pincer ligands. Radical anionic and dianionic redox states of the ligand are involved in its FeII complexes obtained from FeBr2/KC8.
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Affiliation(s)
- Thomas Simler
- Université de Strasbourg
- CNRS
- CHIMIE UMR 7177
- Laboratoire de Chimie de Coordination
- 67081 Strasbourg Cedex
| | - Andreas A. Danopoulos
- Université de Strasbourg
- CNRS
- CHIMIE UMR 7177
- Laboratoire de Chimie de Coordination
- 67081 Strasbourg Cedex
| | - Pierre Braunstein
- Université de Strasbourg
- CNRS
- CHIMIE UMR 7177
- Laboratoire de Chimie de Coordination
- 67081 Strasbourg Cedex
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32
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Huang W, Diaconescu PL. Reactivity and Properties of Metal Complexes Enabled by Flexible and Redox-Active Ligands with a Ferrocene Backbone. Inorg Chem 2016; 55:10013-10023. [DOI: 10.1021/acs.inorgchem.6b01118] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Wenliang Huang
- Department of Chemistry and
Biochemistry, University of California, Los Angeles, 607 Charles
E Young Drive East, Los Angeles, California 90095, United States
| | - Paula L. Diaconescu
- Department of Chemistry and
Biochemistry, University of California, Los Angeles, 607 Charles
E Young Drive East, Los Angeles, California 90095, United States
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33
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Vaddypally S, McKendry IG, Tomlinson W, Hooper JP, Zdilla MJ. Electronic Structure of Manganese Complexes of the Redox‐Non‐innocent Tetrazene Ligand and Evidence for the Metal‐Azide/Imido Cycloaddition Intermediate. Chemistry 2016; 22:10548-57. [DOI: 10.1002/chem.201600531] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 05/12/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Shivaiah Vaddypally
- Department of Chemistry Temple University 1901 N. 13th St. Philadelphia PA 19122 USA
| | - Ian G. McKendry
- Department of Chemistry Temple University 1901 N. 13th St. Philadelphia PA 19122 USA
| | - Warren Tomlinson
- Department of Physics Naval Postgraduate School 833 Dyer Rd. Monterey CA 93943 USA
| | - Joseph P. Hooper
- Department of Physics Naval Postgraduate School 833 Dyer Rd. Monterey CA 93943 USA
| | - Michael J. Zdilla
- Department of Chemistry Temple University 1901 N. 13th St. Philadelphia PA 19122 USA
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34
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Hou C, Zhang Z, Zhao C, Ke Z. DFT Study of Acceptorless Alcohol Dehydrogenation Mediated by Ruthenium Pincer Complexes: Ligand Tautomerization Governing Metal Ligand Cooperation. Inorg Chem 2016; 55:6539-51. [DOI: 10.1021/acs.inorgchem.6b00723] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Cheng Hou
- MOE Key Laboratory of Bioinorganic
and Synthetic Chemistry, School of Chemistry and Chemical Engineering,
School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, P. R. China
| | - Zhihan Zhang
- MOE Key Laboratory of Bioinorganic
and Synthetic Chemistry, School of Chemistry and Chemical Engineering,
School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, P. R. China
| | - Cunyuan Zhao
- MOE Key Laboratory of Bioinorganic
and Synthetic Chemistry, School of Chemistry and Chemical Engineering,
School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, P. R. China
| | - Zhuofeng Ke
- MOE Key Laboratory of Bioinorganic
and Synthetic Chemistry, School of Chemistry and Chemical Engineering,
School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, P. R. China
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35
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King AE, Stieber SCE, Henson NJ, Kozimor SA, Scott BL, Smythe NC, Sutton AD, Gordon JC. Ni(bpy)(cod): A Convenient Entryway into the Efficient Hydroboration of Ketones, Aldehydes, and Imines. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600143] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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36
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Alsabeh PG, Rosas-Hernández A, Barsch E, Junge H, Ludwig R, Beller M. Iron-catalyzed photoreduction of carbon dioxide to synthesis gas. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01129a] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photocatalytic processes to convert CO2 to useful products including CO and HCOOH are of particular interest as a means to harvest the power of the sun for sustainable energy applications. Herein, we report the photocatalytic reduction of CO2 using iron-based catalysts and visible light generating varying ratios of synthesis gas.
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Affiliation(s)
- Pamela G. Alsabeh
- Leibniz Institute for Catalysis at the University of Rostock
- 18059 Rostock
- Germany
| | | | - Enrico Barsch
- Leibniz Institute for Catalysis at the University of Rostock
- 18059 Rostock
- Germany
- Institute of Chemistry
- Department Physical Chemistry
| | - Henrik Junge
- Leibniz Institute for Catalysis at the University of Rostock
- 18059 Rostock
- Germany
| | - Ralf Ludwig
- Leibniz Institute for Catalysis at the University of Rostock
- 18059 Rostock
- Germany
- Institute of Chemistry
- Department Physical Chemistry
| | - Matthias Beller
- Leibniz Institute for Catalysis at the University of Rostock
- 18059 Rostock
- Germany
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37
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Roth CE, Dibenedetto A, Aresta M. Synthesis and Characterization of Chloro- and Alkyliron Complexes with N-Donor Ligands and Their Reactivity towards CO2. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500657] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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38
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Durgaprasad G, Xie ZL, Rose MJ. Iron Hydride Detection and Intramolecular Hydride Transfer in a Synthetic Model of Mono-Iron Hydrogenase with a CNS Chelate. Inorg Chem 2015; 55:386-9. [DOI: 10.1021/acs.inorgchem.5b01733] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Gummadi Durgaprasad
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Zhu-Lin Xie
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Michael J. Rose
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
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39
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Lichtenberg C, Adelhardt M, Gianetti TL, Meyer K, de Bruin B, Grützmacher H. Low-Valent Iron Mono-Diazadiene Compounds: Electronic Structure and Catalytic Application. ACS Catal 2015. [DOI: 10.1021/acscatal.5b01416] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Crispin Lichtenberg
- Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Mario Adelhardt
- Department of Chemistry & Pharmacy, Friedrich-Alexander University, Erlangen-Nürnberg (FAU), Egerlandstraße 1, D-91058 Erlangen, Germany
| | - Thomas L. Gianetti
- Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Karsten Meyer
- Department of Chemistry & Pharmacy, Friedrich-Alexander University, Erlangen-Nürnberg (FAU), Egerlandstraße 1, D-91058 Erlangen, Germany
| | - Bas de Bruin
- van ’t Hoff Institute for Molecular Sciences, Department of Homogeneous Catalysis, Faculty of Science, Universiteit van Amsterdam, Postbus 94720, 1090 GS Amsterdam, The Netherlands
| | - Hansjörg Grützmacher
- Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland
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40
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41
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Zell T, Milstein D. Hydrogenation and dehydrogenation iron pincer catalysts capable of metal-ligand cooperation by aromatization/dearomatization. Acc Chem Res 2015; 48:1979-94. [PMID: 26079678 DOI: 10.1021/acs.accounts.5b00027] [Citation(s) in RCA: 459] [Impact Index Per Article: 51.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The substitution of expensive and potentially toxic noble-metal catalysts by cheap, abundant, environmentally benign, and less toxic metals is highly desirable and in line with green chemistry guidelines. We have recently discovered a new type of metal-ligand cooperation, which is based on the reversible dearomatization/aromatization of different heteroaromatic ligand cores caused by deprotonation/protonation of the ligand. More specifically, we have studied complexes of various transition metals (Ru, Fe, Co, Rh, Ir, Ni, Pd, Pt, and Re) bearing pyridine- and bipyridine-based PNP and PNN pincer ligands, which have slightly acidic methylene protons. In addition, we have discovered long-range metal-ligand cooperation in acridine-based pincer ligands, where the cooperation takes place at the electrophilic C-9 position of the acridine moiety leading to dearomatization of its middle ring. This type of metal-ligand cooperation was used for the activation of chemical bonds, including H-H, C-H (sp(2) and sp(3)), O-H, N-H, and B-H bonds. This unusual reactivity likely takes place in various catalytic hydrogenation, dehydrogenation, and related reactions. In this Account, we summarize our studies on novel bifunctional iron PNP and PNN pincer complexes, which were designed on the basis of their ruthenium congeners. Iron PNP pincer complexes serve as efficient (pre)catalysts for hydrogenation and dehydrogenation reactions under remarkably mild conditions. Their catalytic applications include atom-efficient and industrially important hydrogenation reactions of ketones, aldehydes, and esters to the corresponding alcohols. Moreover, they catalyze the hydrogenation of carbon dioxide to sodium formate in the presence of sodium hydroxide, the selective decomposition of formic acid to carbon dioxide and hydrogen, and the E-selective semihydrogenation of alkynes to give E-alkenes. These catalysts feature, compared to other iron-based catalysts, very high catalytic activities which in some cases can even exceed those of state-of-the-art noble-metal catalysts. For the iron PNP systems, we describe the synthesis of the pyridine- and acridine-based PNP iron complexes and their performances and limitations in catalytic reactions, and we present studies on their reactivity with relevance to their catalytic mechanisms. In the case of the bipyridine-based PNN system, we summarize the synthesis of new complexes and describe studies on the noninnocence of the methylene position, which can be reversibly deprotonated, as well as on the noninnocence of the bipyridine unit. Overall, this Account underlines that the combination of cheap and abundant iron with ligands that are capable of metal-ligand cooperation can result in the development of novel, versatile, and efficient catalysts for atom-efficient catalytic reactions.
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Affiliation(s)
- Thomas Zell
- Department
of Organic Chemistry, Weizmann Institute of Science, 76100 Rehovot, Israel
| | - David Milstein
- Department
of Organic Chemistry, Weizmann Institute of Science, 76100 Rehovot, Israel
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42
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Gilbert-Wilson R, Chu WY, Rauchfuss TB. Phosphine-iminopyridines as platforms for catalytic hydrofunctionalization of alkenes. Inorg Chem 2015; 54:5596-603. [PMID: 25978588 DOI: 10.1021/acs.inorgchem.5b00692] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of phosphine-diimine ligands were synthesized by the condensation of 2-(diphenylphosphino)aniline (PNH2) with a variety of formyl and ketopyridines. Condensation of PNH2 with acetyl- and benzoylpyridine yielded the Ph2P(C6H4)N═C(R)(C5H4N), respectively abbreviated PN(Me)py and PN(Ph)py. With ferrous halides, PN(Ph)py gave the complexes FeX2(PN(Ph)py) (X = Cl, Br). Condensation of pyridine carboxaldehyde and its 6-methyl derivatives with PNH2 was achieved using a ferrous template, affording low-spin complexes [Fe(PN(H)py(R))2](2+) (R = H, Me). Dicarbonyls Fe(PN(R)py)(CO)2 were produced by treating PN(Me)py with Fe(benzylideneacetone)(CO)3 and reduction of FeX2(PN(Ph)py) with NaBEt3H under a CO atmosphere. Cyclic voltammetric studies show that the [FeL3(CO)2](0/-) and [FeL3(CO)2](+/0) couples are similar for a range of tridentate ligands, but the PN(Ph)py system uniquely sustains two one-electron reductions. Treatment of Fe(PN(Ph)py)X2 with NaBEt3H gave active catalysts for the hydroboration of 1-octene with pinacolborane. Similarly, these catalysts proved active for the addition of diphenylsilane, but not HSiMe(OSiMe3)2, to 1-octene and vinylsilanes. Evidence is presented that catalysis occurs via iron hydride complexes of intact PN(Ph)py.
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Affiliation(s)
- Ryan Gilbert-Wilson
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Wan-Yi Chu
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Thomas B Rauchfuss
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
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43
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Butschke B, Fillman KL, Bendikov T, Shimon LJW, Diskin-Posner Y, Leitus G, Gorelsky SI, Neidig ML, Milstein D. How Innocent are Potentially Redox Non-Innocent Ligands? Electronic Structure and Metal Oxidation States in Iron-PNN Complexes as a Representative Case Study. Inorg Chem 2015; 54:4909-26. [DOI: 10.1021/acs.inorgchem.5b00509] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Kathlyn L. Fillman
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | | | | | | | | | - Serge I. Gorelsky
- Centre for Catalysis Research and Innovation, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Michael L. Neidig
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
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44
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Rivada-Wheelaghan O, Dauth A, Leitus G, Diskin-Posner Y, Milstein D. Synthesis and Reactivity of Iron Complexes with a New Pyrazine-Based Pincer Ligand, and Application in Catalytic Low-Pressure Hydrogenation of Carbon Dioxide. Inorg Chem 2015; 54:4526-38. [DOI: 10.1021/acs.inorgchem.5b00366] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Orestes Rivada-Wheelaghan
- Department of Organic
Chemistry and ‡Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Alexander Dauth
- Department of Organic
Chemistry and ‡Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Gregory Leitus
- 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
| | - David Milstein
- Department of Organic
Chemistry and ‡Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
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45
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Schaefer BA, Margulieux GW, Small BL, Chirik PJ. Evaluation of Cobalt Complexes Bearing Tridentate Pincer Ligands for Catalytic C–H Borylation. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00044] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Brian A. Schaefer
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Grant W. Margulieux
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Brooke L. Small
- Chevron Phillips Chemical Company, 1862 Kingwood Drive, Kingwood, Texas 77339, United States
| | - Paul J. Chirik
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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46
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Glatz M, Bichler B, Mastalir M, Stöger B, Weil M, Mereiter K, Pittenauer E, Allmaier G, Veiros LF, Kirchner K. Iron(ii) complexes featuring κ3- and κ2-bound PNP pincer ligands – the significance of sterics. Dalton Trans 2015; 44:281-94. [PMID: 25376759 DOI: 10.1039/c4dt02866j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of octahedral Fe(ii) complexes of the type [Fe(κ3-P,N,P-PNP)(κ2-P,N-PNP)X]+ (X = Cl, Br) where PNP pincer ligands are coordinated both in a κ3-P,N,P- and κ2-P,N-fashion was prepared and characterized.
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Affiliation(s)
- Mathias Glatz
- Institute of Applied Synthetic Chemistry
- Vienna University of Technology
- A-1060 Vienna
- Austria
| | - Bernhard Bichler
- Institute of Applied Synthetic Chemistry
- Vienna University of Technology
- A-1060 Vienna
- Austria
| | - Matthias Mastalir
- Institute of Applied Synthetic Chemistry
- Vienna University of Technology
- A-1060 Vienna
- Austria
| | - Berthold Stöger
- Institute of Chemical Technologies and Analytics
- Vienna University of Technology
- A-1060 Vienna
- Austria
| | - Matthias Weil
- Institute of Chemical Technologies and Analytics
- Vienna University of Technology
- A-1060 Vienna
- Austria
| | - Kurt Mereiter
- Institute of Chemical Technologies and Analytics
- Vienna University of Technology
- A-1060 Vienna
- Austria
| | - Ernst Pittenauer
- Institute of Chemical Technologies and Analytics
- Vienna University of Technology
- A-1060 Vienna
- Austria
| | - Günter Allmaier
- Institute of Chemical Technologies and Analytics
- Vienna University of Technology
- A-1060 Vienna
- Austria
| | - Luis F. Veiros
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049-001 Lisboa
- Portugal
| | - Karl Kirchner
- Institute of Applied Synthetic Chemistry
- Vienna University of Technology
- A-1060 Vienna
- Austria
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47
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Zell T, Ben-David Y, Milstein D. Highly efficient, general hydrogenation of aldehydes catalyzed by PNP iron pincer complexes. Catal Sci Technol 2015. [DOI: 10.1039/c4cy01501k] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Well-defined iron pincer complexes are effective catalysts for the synthetically and industrially important hydrogenation of aldehydes to alcohols.
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Affiliation(s)
- Thomas Zell
- Department of Organic Chemistry
- Weizmann Institute of Science
- 76100 Rehovot
- Israel
| | - Yehoshoa Ben-David
- Department of Organic Chemistry
- Weizmann Institute of Science
- 76100 Rehovot
- Israel
| | - David Milstein
- Department of Organic Chemistry
- Weizmann Institute of Science
- 76100 Rehovot
- Israel
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48
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Guo N, Hu MY, Feng Y, Zhu SF. Highly efficient and practical hydrogenation of olefins catalyzed by in situ generated iron complex catalysts. Org Chem Front 2015. [DOI: 10.1039/c5qo00064e] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In situ generated Fe catalysts from bench-stable Fe(ii) complexes and LiAlH4 exhibited unprecedented activity for the hydrogenation of olefins.
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Affiliation(s)
- Na Guo
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering
- Nankai University
- Tianjin 300071
- China
| | - Meng-Yang Hu
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering
- Nankai University
- Tianjin 300071
- China
| | - Ye Feng
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering
- Nankai University
- Tianjin 300071
- China
| | - Shou-Fei Zhu
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering
- Nankai University
- Tianjin 300071
- China
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49
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Jin G, Vendier L, Coppel Y, Sabo-Etienne S, Bontemps S. Three bonding modes of bis(2-picolyl)phenylphosphine at iron: isolation of a dinuclear iron complex featuring dearomatized pyridine moieties. Dalton Trans 2015; 44:7500-5. [DOI: 10.1039/c5dt00537j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three iron complexes displaying different coordination modes of the NPN ligand were isolated, including one dinuclear compound featuring dearomatized pyridine moieties.
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Affiliation(s)
- G. Jin
- CNRS
- LCC (Laboratoire de Chimie de Coordination)
- F-31077 Toulouse Cedex 4
- France
- Université de Toulouse
| | - L. Vendier
- CNRS
- LCC (Laboratoire de Chimie de Coordination)
- F-31077 Toulouse Cedex 4
- France
- Université de Toulouse
| | - Y. Coppel
- CNRS
- LCC (Laboratoire de Chimie de Coordination)
- F-31077 Toulouse Cedex 4
- France
- Université de Toulouse
| | - S. Sabo-Etienne
- CNRS
- LCC (Laboratoire de Chimie de Coordination)
- F-31077 Toulouse Cedex 4
- France
- Université de Toulouse
| | - S. Bontemps
- CNRS
- LCC (Laboratoire de Chimie de Coordination)
- F-31077 Toulouse Cedex 4
- France
- Université de Toulouse
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50
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Greenhalgh MD, Jones AS, Thomas SP. Iron-Catalysed Hydrofunctionalisation of Alkenes and Alkynes. ChemCatChem 2014. [DOI: 10.1002/cctc.201402693] [Citation(s) in RCA: 260] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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