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Denker L, Wullschläger D, Martínez JP, Świerczewski S, Trzaskowski B, Tamm M, Frank R. Cobalt(I)-Catalyzed Transformation of Si–H Bonds: H/D Exchange in Hydrosilanes and Hydrosilylation of Olefins. ACS Catal 2023. [DOI: 10.1021/acscatal.2c06259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Affiliation(s)
- Lars Denker
- Institute of Inorganic and Analytical Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106Braunschweig, Germany
| | - Daniela Wullschläger
- Institute of Inorganic and Analytical Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106Braunschweig, Germany
| | - Juan Pablo Martínez
- Centre of New Technologies, University of Warsaw, Banacha 2C, 02-097Warsaw, Poland
| | - Stanisław Świerczewski
- Centre of New Technologies, University of Warsaw, Banacha 2C, 02-097Warsaw, Poland
- College of Inter-faculty Individual Studies in Mathematics and Natural Sciences, University of Warsaw, Banacha 2C, 02-097Warsaw, Poland
| | - Bartosz Trzaskowski
- Centre of New Technologies, University of Warsaw, Banacha 2C, 02-097Warsaw, Poland
| | - Matthias Tamm
- Institute of Inorganic and Analytical Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106Braunschweig, Germany
| | - René Frank
- Institute of Inorganic and Analytical Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106Braunschweig, Germany
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2
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Wang N, Feng B, Cui P, Tamm M, Chen Y. Imidazolin-2-iminato Cerium(IV) Chlorides: Synthesis, Structure and Electrochemical Properties. Chem Asian J 2023; 18:e202201135. [PMID: 36445801 DOI: 10.1002/asia.202201135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 11/27/2022] [Accepted: 11/28/2022] [Indexed: 11/30/2022]
Abstract
The ligand field greatly affects the redox properties of cerium. Herein, cerium(III) and cerium(IV) complexes supported by imidazolin-2-iminato ligands were synthesized and structurally characterized, and their electrochemical properties were investigated. Silylamine elimination of cerium(III) amide Ce{N(SiMe3 )2 }3 with imidazolin-2-imine ImR NH (R=Mes, tBu, iPr) provided imidazolin-2-iminato cerium(III) complexes, [(ImMes N)(ImMes NH)Ce{N(SiMe3 )2 }2 ] (1), [(ImtBu N)2 (ImtBu NH)Ce{N(SiMe3 )2 }] (2) and [(ImiPr N)2 (ImiPr NH)Ce(μ-ImiPr N)]2 (4) in 71-85% yields. These cerium(III) complexes were successfully oxidized by Ph3 CCl or C2 Cl6 to afford imidazolin-2-iminato cerium(IV) chlorides, [(ImMes N)2 Ce{N(SiMe3 )2 }Cl] (5), [(ImtBu N)3 CeCl] (6) and [(ImiPr N)2 Ce(μ-ImiPr N)Cl]2 (7) in 70%-76% yields. All complexes were characterized by the single-crystal X-ray diffraction, which showed that 1, 2, 5 and 6 are monomers while 4 and 7 are dimers. The electrochemical studies indicated that the Ce(III/IV) couples for 5 and 6 are more negative than those of silylamido cerium(IV) complexes, and the Ce(III/IV) couples for 1 and 2 have a similar trend.
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Affiliation(s)
- Ning Wang
- Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, P. R. China.,State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
| | - Bin Feng
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
| | - Peng Cui
- Key Laboratory of Functional Molecular Solids Ministry of Education Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials ScienceAnhui Normal University, S189 Jiuhua Road, Wuhu, Anhui, 241002, P. R. China
| | - Matthias Tamm
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106, Braunschweig, Germany
| | - Yaofeng Chen
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China.,Spin-X Institute School of Chemistry and Chemical Engineering Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials, South China University of Technology, Guangzhou, 510641, P. R. China
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3
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Koneczny M, Erol AB, Mauduit M, Eisen MS, Tamm M. Titanium complexes with unsymmetrically substituted imidazolin-2-iminato ligands. Dalton Trans 2022; 51:11448-11456. [PMID: 35822511 DOI: 10.1039/d2dt01740g] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of the unsymmetrical N-heterocyclic carbenes 1-(2,4,6-trimethylphenyl)-3-(adamantyl)imidazolin-2-ylidene (IAdMes, 1a) and 1-(2,6-diisopropylphenyl)-3-(adamantyl)imidazolin-2-ylidene (IAdDipp, 1b) with trimethylsilyl azide furnished the 2-(trimethylsilylimino)imidazolines 2a (ImAdMesNSiMe3) and 2b (ImAdDippNSiMe3). Desilylation by stirring in methanol gave the corresponding imidazolin-2-imines 3a (ImAdMesNH) and 3b (ImAdDippNH). 2a and 2b were treated with [TiCl4(THF)2] (THF = tetrahydrofuran) and [CpTiCl3] (Cp = η5-C5H5) to form the mono- and bis(imidazolin-2-iminato) titanium(IV) complexes [(ImAdRN)TiCl3] (4, R = Mes, Dipp), [Cp(ImAdRN)TiCl2] (5, R = Mes, Dipp), and [(ImAdRN)2TiCl2] (6, R = Mes, Dipp). The crystal structures of all compounds except 2b were determined by X-ray diffraction analysis.
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Affiliation(s)
- Marvin Koneczny
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Brauschweig, Germany.
| | - Arife Büsra Erol
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Brauschweig, Germany.
| | - Marc Mauduit
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR-UMR 6226, F-35000 Rennes, France
| | - Moris S Eisen
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Technion City, 32000 Haifa, Israel
| | - Matthias Tamm
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Brauschweig, Germany.
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Orlova AP, Hilgar JD, Bernbeck MG, Gembicky M, Rinehart JD. Intuitive Control of Low-Energy Magnetic Excitations via Directed Dipolar Interactions in a Series of Er(III)-Based Complexes. J Am Chem Soc 2022; 144:11316-11325. [PMID: 35713679 DOI: 10.1021/jacs.2c03236] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Dipolar coupling is rarely invoked as a driving force for slow relaxation dynamics in lanthanide-based single-molecule magnets, though it is often the strongest mechanism available for mediating inter-ion magnetic interactions in such species. Indeed, for multinuclear lanthanide complexes, the magnitude and anisotropy of the dipolar interaction can be considerable given their ability to form highly directional, high-moment ground states. Herein, we present a mono-, di-, and trinuclear erbium-based single-molecule magnet sequence, ([Er-TiPS2COT]+)n (n = 1-3), wherein a drastic reduction in the allowedness of magnetic relaxation pathways is rationalized within the framework of the dipole-dipole interactions between angular momentum quanta. The resulting design principles for multinuclear molecular magnetism arising from intramolecular dipolar coupling interactions between highly anisotropic magnetic states present a nuanced justification of the relaxation dynamics in complex manifolds of individual quantized transitions. Experimental evidence for the validity of this model is provided by coupling the relaxation dynamics to an AC magnetic field across an unprecedented frequency range for molecular magnetism (103-10-5 Hz). The combination of slow dynamics and multiple, low-energy transitions leads to a number of noteworthy phenomena, including a lanthanide single-molecule magnet with three well-defined relaxation processes observable at a single temperature.
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Affiliation(s)
- Angelica P Orlova
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Jeremy D Hilgar
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Maximilian G Bernbeck
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Milan Gembicky
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Jeffrey D Rinehart
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
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Jin PB, Luo QC, Zhai YQ, Wang YD, Ma Y, Tian L, Zhang X, Ke C, Zhang XF, Lv Y, Zheng YZ. A study of cation-dependent inverse hydrogen bonds and magnetic exchange-couplings in lanthanacarborane complexes. iScience 2021; 24:102760. [PMID: 34278267 PMCID: PMC8271178 DOI: 10.1016/j.isci.2021.102760] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 05/07/2021] [Accepted: 06/18/2021] [Indexed: 11/25/2022] Open
Abstract
Ten lanthanacarborane complexes were synthesized to study the rare B-Hδ-∙∙∙Mn+ inverse hydrogen bonds (IHBs). The average bonding energy of B-Hδ-∙∙∙Ln3+ is theoretically determined to be larger than 24 kJ/mol, which is comparable to moderately strong hydrogen bonds (21-56 kJ/mol). In addition to NMR and IR, magnetometer was used to study the exchange-coupling interaction via such B-Hδ-∙∙∙Ln3+ IHBs in detail, and the coupling constant is determined to be -2.0 cm-1, which is strong enough to compare with single-atom bridged dysprosium(III) complexes. Two imidazolin-iminato incorporated complexes have shown energy barrier for magnetization reversal larger than 1000 K, and the exchange-biasing effects are evident. Moreover, the bonding strengths of B-Hδ-∙∙∙Mn+ IHBs are cation-dependent. If M = Na, the B-Hδ-∙∙∙Na+ bonding energy is reduced to 14 kJ/mol, and the dimerization process is no longer reversible. The exchange-biasing effect is also disappeared. We believe such a finding extends our knowledge of IHBs.
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Affiliation(s)
- Peng-Bo Jin
- Frontier Institute of Science and Technology (FIST), Xi'an Jiaotong University Shenzhen Research School, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and School of Chemistry, Xi'an Jiaotong University, 99 Yanxiang Road, Xi'an, Shaanxi, P.R. China
| | - Qian-Cheng Luo
- Frontier Institute of Science and Technology (FIST), Xi'an Jiaotong University Shenzhen Research School, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and School of Chemistry, Xi'an Jiaotong University, 99 Yanxiang Road, Xi'an, Shaanxi, P.R. China
| | - Yuan-Qi Zhai
- Frontier Institute of Science and Technology (FIST), Xi'an Jiaotong University Shenzhen Research School, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and School of Chemistry, Xi'an Jiaotong University, 99 Yanxiang Road, Xi'an, Shaanxi, P.R. China
| | - Yi-Dian Wang
- Frontier Institute of Science and Technology (FIST), Xi'an Jiaotong University Shenzhen Research School, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and School of Chemistry, Xi'an Jiaotong University, 99 Yanxiang Road, Xi'an, Shaanxi, P.R. China
| | - Yan Ma
- Frontier Institute of Science and Technology (FIST), Xi'an Jiaotong University Shenzhen Research School, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and School of Chemistry, Xi'an Jiaotong University, 99 Yanxiang Road, Xi'an, Shaanxi, P.R. China
| | - Lei Tian
- State Key Laboratory of Military Stomatology, National Clinical Research Center of Oral Diseases, Shaanxi Key Laboratory of Oral Diseases, Department of Cranio-facial Trauma and Orthognathic Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, No. 145, Changle Xi Road, 710032 Xi'an, Shaanxi, P.R. China
| | - Xinliang Zhang
- Department of Spine Surgery, Honghui Hospital, Xi'an Jiaotong University, 710054 Xi'an, Shaanxi, P.R. China
| | - Chao Ke
- Department of Orthopaedic Trauma, Honghui Hospital, College of Medicine, Xi'an Jiaotong University, 710054 Xi'an, Shaanxi, P.R. China
| | - Xu-Feng Zhang
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, 710061 Xi'an, Shaanxi, P.R. China
| | - Yi Lv
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, 710061 Xi'an, Shaanxi, P.R. China
| | - Yan-Zhen Zheng
- Frontier Institute of Science and Technology (FIST), Xi'an Jiaotong University Shenzhen Research School, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and School of Chemistry, Xi'an Jiaotong University, 99 Yanxiang Road, Xi'an, Shaanxi, P.R. China
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Said M, Rehman S, Ikram M, Khan H, Schulzke C. Synthesis and crystal structure analyses of tri-substituted guanidine-based copper(II) complexes. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2021. [DOI: 10.1515/znb-2020-0155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Three guanidine-derived tri-substituted ligands viz. N-pivaloyl-N′,N″-bis-(2-methoxyphenyl)guanidine (L1), N-pivaloyl-N′-(2-methoxyphenyl)-N″-phenylguanidine (L2) and N-pivaloyl-N′-(2-methoxyphenyl)-N″-(2-tolyl)guanidine (L3) were reacted with Cu(II) acetate to produce the corresponding complexes. The significance of the substituent on N″ for the resulting molecular structures and their packing in the solid state has been studied with respect to the structural specifics of the corresponding Cu(II) complexes. The key characteristic of the guanidine-based metal complexation with Cu(II) is the formation of an essentially square planar core with an N2O2 donor set. As an exception, in the complex of L1, the substituent’s methoxy moiety also interacts with the Cu(II) center to generate a square-pyramidal geometry. The hydroxyl groups of the imidic acid tautomeric forms of L1–L3, in addition to N″, are also bonded to Cu(II) in all three complexes rather than the nitrogen donor of the guanidine motif.
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Affiliation(s)
- Muhammad Said
- Department of Chemistry , University of Malakand , Chakdara , 23050 , Pakistan
| | - Sadia Rehman
- Department of Chemistry , Abdul Wali Khan University , Mardan , 23200 , Pakistan
| | - Muhammad Ikram
- Department of Chemistry , Abdul Wali Khan University , Mardan , 23200 , Pakistan
| | - Hizbullah Khan
- Department of Chemistry , University of Science and Technology , Bannu , 28100 , Pakistan
| | - Carola Schulzke
- Institut für Biochemie , Universität Greifswald , Felix-Hausdorff-Straße 4 , 17489 Greifswald , Germany
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7
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Stogniy MY, Erokhina SA, Suponitsky KY, Markov VY, Sivaev IB. Synthesis and crystal structures of nickel(ii) and palladium(ii) complexes with o-carboranyl amidine ligands. Dalton Trans 2021; 50:4967-4975. [PMID: 33877195 DOI: 10.1039/d1dt00373a] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A number of new nido-carboranyl amidines 10-R(CH2)nNHC(Et)[double bond, length as m-dash]HN-7,8-C2B9H11 (n = 2, R = OH, OMe, and NMe2; n = 3, R = OH) were synthesized by the nucleophilic addition of amino alcohols and N,N-dimethylethylenediamine to the highly activated -C[triple bond, length as m-dash]N+- triple bond of the 10-propionitrilium derivative of nido-carborane. A similar reaction of 10-EtC[triple bond, length as m-dash]N-7,8-C2B9H11 with ethylenediamine unexpectedly resulted in the cleavage of the C[triple bond, length as m-dash]N bond to form the ammonium derivative 10-H3N-7,8-C2B9H11. The complexation of the synthesized carboranyl amidines 10-MeO(CH2)2NHC(Et)[double bond, length as m-dash]HN-7,8-C2B9H11 and 10-Me2N(CH2)2NHC(Et)[double bond, length as m-dash]HN-7,8-C2B9H11 with nickel and palladium phosphine complexes [(Ph3P)2MCl2] (M = Ni, Pd) was studied. The reactions with 10-MeO(CH2)2NHC(Et)[double bond, length as m-dash]HN-7,8-C2B9H11 result in half-sandwiched metallacarborane complexes with the retention of one triphenylphosphine ligand [3-Ph3P-3-(8-MeOCH2CH2N[double bond, length as m-dash]C(Et)NH)-3,1,2-MC2B9H10], while the reactions with 10-Me2N(CH2)2NHC(Et)[double bond, length as m-dash]HN-7,8-C2B9H11 proceed with the complete loss of the phosphine ligands and lead to the formation of complexes with the η5:κ2(N,N')-coordinated carboranyl amidine ligand [3,3-(8-Me2NCH2CH2N[double bond, length as m-dash]C(Et)NH)-3,1,2-MC2B9H10]. The crystal molecular structures of the synthesized complexes were determined by single crystal X-ray diffraction.
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Affiliation(s)
- Marina Yu Stogniy
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Str., 119991, Moscow, Russia.
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Dolati H, Denker L, Trzaskowski B, Frank R. Superseding β-Diketiminato Ligands: An Amido Imidazoline-2-Imine Ligand Stabilizes the Exhaustive Series of B=X Boranes (X=O, S, Se, Te). Angew Chem Int Ed Engl 2021; 60:4633-4639. [PMID: 33283430 PMCID: PMC7986232 DOI: 10.1002/anie.202015553] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Indexed: 01/01/2023]
Abstract
Boron reluctantly forms B=X (X=O, S, Se, Te) moieties, which has stimulated the quest for such species in the past few years. Based on the N,N'-chelating β-diketiminato ligand (HNacNac), a new amido imidazoline-2-imine ligand system (HAmIm) is presented, giving rise to the isolation of an exhaustive series of Lewis acid free, monomeric chalcogen B=X boranes with documented π-bond character between boron and the chalcogen. The chalcogenoboranes are isoelectronic and isolobal to the respective ketones. The chemical behavior of the oxoborane (B=O) strongly resembles the classical carbonyl reactivity in C=O bonds. The improved stability provided by HAmIm arises from the formation of more-stable five-membered boron chelates versus the six-membered NacNac analogues and from the imidazoline-2-imine moiety providing enhanced σ- and π-donation. The HAmIm ligand class may supersede the widely employed NacNac system in certain applications.
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Affiliation(s)
- Hadi Dolati
- Institute of Inorganic and Analytical ChemistryTechnische Universität BraunschweigHagenring 3038106BraunschweigGermany
| | - Lars Denker
- Institute of Inorganic and Analytical ChemistryTechnische Universität BraunschweigHagenring 3038106BraunschweigGermany
| | - Bartosz Trzaskowski
- Centre of New TechnologiesUniversity of WarsawBanacha 2C02-097WarszawaPoland
| | - René Frank
- Institute of Inorganic and Analytical ChemistryTechnische Universität BraunschweigHagenring 3038106BraunschweigGermany
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9
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Dolati H, Denker L, Trzaskowski B, Frank R. Superseding β‐Diketiminato Ligands: An Amido Imidazoline‐2‐Imine Ligand Stabilizes the Exhaustive Series of B=X Boranes (X=O, S, Se, Te). Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015553] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Hadi Dolati
- Institute of Inorganic and Analytical Chemistry Technische Universität Braunschweig Hagenring 30 38106 Braunschweig Germany
| | - Lars Denker
- Institute of Inorganic and Analytical Chemistry Technische Universität Braunschweig Hagenring 30 38106 Braunschweig Germany
| | - Bartosz Trzaskowski
- Centre of New Technologies University of Warsaw Banacha 2C 02-097 Warszawa Poland
| | - René Frank
- Institute of Inorganic and Analytical Chemistry Technische Universität Braunschweig Hagenring 30 38106 Braunschweig Germany
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10
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Anufriev SA, Sivaev IB, Nakamura H. Two possible ways to combine boron and gadolinium for Gd-guided BNCT. A concept. PHOSPHORUS SULFUR 2020. [DOI: 10.1080/10426507.2020.1804151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Sergey A. Anufriev
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, Russia
| | - Igor B. Sivaev
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, Russia
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11
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Kalita AJ, Rohman SS, Kashyap C, Ullah SS, Mazumder LJ, Guha AK. Theoretical Prediction of a Neutral Zero‐Valent Beryllium Compound Isoelectronic with Singlet Carbenes. ChemistrySelect 2020. [DOI: 10.1002/slct.202002415] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Amlan J. Kalita
- Advanced Computational Chemistry CentreDepartment of ChemistryCotton University, Panbazar, Guwahati Assam INDIA- 781001
| | - Shahnaz S. Rohman
- Advanced Computational Chemistry CentreDepartment of ChemistryCotton University, Panbazar, Guwahati Assam INDIA- 781001
| | - Chayanika Kashyap
- Advanced Computational Chemistry CentreDepartment of ChemistryCotton University, Panbazar, Guwahati Assam INDIA- 781001
| | - Sabnam S. Ullah
- Advanced Computational Chemistry CentreDepartment of ChemistryCotton University, Panbazar, Guwahati Assam INDIA- 781001
| | - Lakhya J. Mazumder
- Advanced Computational Chemistry CentreDepartment of ChemistryCotton University, Panbazar, Guwahati Assam INDIA- 781001
| | - Ankur K. Guha
- Advanced Computational Chemistry CentreDepartment of ChemistryCotton University, Panbazar, Guwahati Assam INDIA- 781001
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12
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Stogniy MY, Erokhina SA, Suponitsky KY, Anisimov AA, Godovikov IA, Sivaev IB, Bregadze VI. Synthesis of novel carboranyl amidines. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121111] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Doddi A, Peters M, Tamm M. N-Heterocyclic Carbene Adducts of Main Group Elements and Their Use as Ligands in Transition Metal Chemistry. Chem Rev 2019; 119:6994-7112. [PMID: 30983327 DOI: 10.1021/acs.chemrev.8b00791] [Citation(s) in RCA: 309] [Impact Index Per Article: 61.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
N-Heterocyclic carbenes (NHC) are nowadays ubiquitous and indispensable in many research fields, and it is not possible to imagine modern transition metal and main group element chemistry without the plethora of available NHCs with tailor-made electronic and steric properties. While their suitability to act as strong ligands toward transition metals has led to numerous applications of NHC complexes in homogeneous catalysis, their strong σ-donating and adaptable π-accepting abilities have also contributed to an impressive vitalization of main group chemistry with the isolation and characterization of NHC adducts of almost any element. Formally, NHC coordination to Lewis acids affords a transfer of nucleophilicity from the carbene carbon atom to the attached exocyclic moiety, and low-valent and low-coordinate adducts of the p-block elements with available lone pairs and/or polarized carbon-element π-bonds are able to act themselves as Lewis basic donor ligands toward transition metals. Accordingly, the availability of a large number of novel NHC adducts has not only produced new varieties of already existing ligand classes but has also allowed establishment of numerous complexes with unusual and often unprecedented element-metal bonds. This review aims at summarizing this development comprehensively and covers the usage of N-heterocyclic carbene adducts of the p-block elements as ligands in transition metal chemistry.
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Affiliation(s)
- Adinarayana Doddi
- Technische Universität Braunschweig, Institut für Anorganische und Analytische Chemie, Hagenring 30, 38106 Braunschweig, Germany
| | - Marius Peters
- Technische Universität Braunschweig, Institut für Anorganische und Analytische Chemie, Hagenring 30, 38106 Braunschweig, Germany
| | - Matthias Tamm
- Technische Universität Braunschweig, Institut für Anorganische und Analytische Chemie, Hagenring 30, 38106 Braunschweig, Germany
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Peters M, Bannenberg T, Bockfeld D, Tamm M. Pentamethylcyclopentadienyl ruthenium “pogo stick” complexes with nitrogen donor ligands. Dalton Trans 2019; 48:4228-4238. [DOI: 10.1039/c9dt00577c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The preparation and reactivity of an imidazolin-2-iminato ruthenium complex with a rare one-legged piano-stool (“pogo stick”) geometry is reported.
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Affiliation(s)
- Marius Peters
- Institut für Anorganische und Analytische Chemie
- Technische Universität Braunschweig
- 38106 Braunschweig
- Germany
| | - Thomas Bannenberg
- Institut für Anorganische und Analytische Chemie
- Technische Universität Braunschweig
- 38106 Braunschweig
- Germany
| | - Dirk Bockfeld
- Institut für Anorganische und Analytische Chemie
- Technische Universität Braunschweig
- 38106 Braunschweig
- Germany
| | - Matthias Tamm
- Institut für Anorganische und Analytische Chemie
- Technische Universität Braunschweig
- 38106 Braunschweig
- Germany
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15
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de Lima Batista AP, S. de Oliveira-Filho AG, Braga AAC. Unveiling the potential of scandium complexes for methane C–H bond activation: a computational study. NEW J CHEM 2019. [DOI: 10.1039/c9nj02760b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Sc(i) complexes activate methane C–H bonds under mild conditions.
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Affiliation(s)
| | | | - Ataualpa A. C. Braga
- Departamento de Química Fundamental
- Instituto de Química
- Universidade de São Paulo
- São Paulo-SP
- Brazil
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16
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Naktode K, Das S, Nayek HP, Panda TK. Reactivity of titanium imidazolin-2-iminato complexes with 2,6-diisopropylaniline and 2-{(2,6-diisopropylphenyl)-iminomethyl}pyrrole. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1544705] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Kishor Naktode
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, India
- Department of Chemistry, Nevjabai Hitkarini College Bramhapuri, Chandrapur, India
| | - Suman Das
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, India
| | - Hari Pada Nayek
- Department of Applied Chemistry, Indian Institute of Technology (ISM), Dhanbad, India
| | - Tarun K. Panda
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, India
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17
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Peters M, Doddi A, Bannenberg T, Freytag M, Jones PG, Tamm M. N-Heterocyclic Carbene-Phosphinidene and Carbene-Phosphinidenide Transition Metal Complexes. Inorg Chem 2017; 56:10785-10793. [DOI: 10.1021/acs.inorgchem.7b01798] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Marius Peters
- Institut für Anorganische und Analytische
Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Adinarayana Doddi
- Institut für Anorganische und Analytische
Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Thomas Bannenberg
- Institut für Anorganische und Analytische
Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Matthias Freytag
- Institut für Anorganische und Analytische
Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Peter G. Jones
- Institut für Anorganische und Analytische
Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Matthias Tamm
- Institut für Anorganische und Analytische
Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
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18
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Affiliation(s)
- Jess Estrada
- Department of Chemistry University of California Riverside Riverside CA 92521 USA
| | - Vincent Lavallo
- Department of Chemistry University of California Riverside Riverside CA 92521 USA
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19
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Affiliation(s)
- Jess Estrada
- Department of Chemistry University of California Riverside Riverside CA 92521 USA
| | - Vincent Lavallo
- Department of Chemistry University of California Riverside Riverside CA 92521 USA
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20
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Trifonov AA, Lyubov DM. A quarter-century long story of bis(alkyl) rare-earth (III) complexes. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2016.09.013] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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21
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Naktode K, Das S, Nayek HP, Panda TK. Imidazolin-2-iminato ligand supported titanium(IV) aryloxo complexes – Syntheses and structures. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2016.11.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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22
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Cycloheptatrienyl dicarbollyl zirconium complexes: Building blocks for the preparation of multidecker sandwich complexes. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2016.11.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Aguilar-Calderón JR, Metta-Magaña AJ, Noll B, Fortier S. C(sp3
)−H Oxidative Addition and Transfer Hydrogenation Chemistry of a Titanium(II) Synthon: Mimicry of Late-Metal Type Reactivity. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607441] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | | | - Bruce Noll
- Bruker AXS Inc.; 5465 East Cheryl Parkway Madison WI 53711 USA
| | - Skye Fortier
- Department of Chemistry; University of Texas at El Paso; El Paso TX 79968 USA
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24
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Aguilar-Calderón JR, Metta-Magaña AJ, Noll B, Fortier S. C(sp 3 )-H Oxidative Addition and Transfer Hydrogenation Chemistry of a Titanium(II) Synthon: Mimicry of Late-Metal Type Reactivity. Angew Chem Int Ed Engl 2016; 55:14101-14105. [PMID: 27709763 DOI: 10.1002/anie.201607441] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 09/12/2016] [Indexed: 12/14/2022]
Abstract
Two-electron reduction of the TiIV compound (ket guan)(ImDipp N)Ti(OTf)2 (3) gives the arene-masked complex (ket guan)(η6 -ImDipp N)Ti (1) in excellent yield. Upon standing in solution, 1 converts to a TiIV metallacycle (4) through dehydrogenation of a pendant isopropyl group. Spectroscopic evidence shows this transformation initially proceeds via the oxidative addition of a C(sp3 )-H bond and can be reversed upon exposure of 4 to H2 . Interestingly, treatment of 1 with cyclohexene gives cyclohexane and 4 via a titanium-mediated transfer hydrogenation reaction, a process that can be extended to catalytically hydrogenate other unsaturated hydrocarbons under mild conditions. These results, rare for the early-metals, suggest 1 possesses chemical characteristics reminiscent of noble, late-metals.
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Affiliation(s)
| | | | - Bruce Noll
- Bruker AXS Inc., 5465 East Cheryl Parkway, Madison, WI, 53711, USA
| | - Skye Fortier
- Department of Chemistry, University of Texas at El Paso, El Paso, TX, 79968, USA.
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25
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Castillo M, Barreda O, Maity AK, Barraza B, Lu J, Metta-Magaña AJ, Fortier S. Advances in Guanidine Ligand Design: Synthesis of a Strongly Electron-Donating, Imidazolin-2-iminato Functionalized Guanidinate and its Properties on Iron. J COORD CHEM 2016; 69:2003-2014. [PMID: 28216799 PMCID: PMC5312970 DOI: 10.1080/00958972.2016.1167198] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 02/18/2016] [Indexed: 10/22/2022]
Abstract
Imidazolin-2-imines (ImRN-), derived from N-heterocylic carbenes, have been shown to be strong electron donors when directly coordinated to metals or when used as a substituent in larger ligand frameworks. In an attempt to enhance the electron-donating properties of the popular guanidine ligand class, the effect of appending an ImRN- backbone onto a guanidinate scaffold was investigated. Addition of 1 equiv of [Li(Et2O)][Im tBuN] to the aryl carbodiimide (dippN)2C (dipp = 2,6-diisopropylphenyl) cleanly affords the lithium Im tBuN-functionalized guanidinate [Li(THF)2][(Im tBuN)C(Ndipp)2] (1). Subsequent metalation of the ligand with FeBr2 gives the yellow Fe(II) complex {[(Im tBuN)C(Ndipp)2]FeBr}2 (4) in good yield. Solid-state structural analyses of both 1 and 4 shows the Im tBuN- group acts as a non-coordinating backbone substituent. Direct structural comparison of 4 to the closely related guanidinate and ketimine-guanidinate complexes {[(X)C(Ndipp)2]FeBr}2 (X = t Bu2C=N (5); N( i Pr)2 (6)), differing only in their backbone, reveals a detectable resonance contribution of the Im tBuN- group to the guanidinate ligand electronic structure. Moreover, the Fe(II)/Fe(III) redox couple of 4 (E1/2 = -0.67 V) is cathodically shifted by greater than 200 mV from the oxidation potentials of 5 (E1/2 = -0.42 V) and 6 (E1/2 = -0.45 V), demonstrating the [(Im tBuN)C(Ndipp)2]- system to be a quantifiably superior electron donor.
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Affiliation(s)
| | - Omar Barreda
- Department of Chemistry, University of Texas at El Paso, El Paso, TX 79968
| | - Arnab K. Maity
- Department of Chemistry, University of Texas at El Paso, El Paso, TX 79968
| | - Brian Barraza
- Department of Chemistry, University of Texas at El Paso, El Paso, TX 79968
| | - Jeffrey Lu
- Department of Chemistry, University of Texas at El Paso, El Paso, TX 79968
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA 93106
| | | | - Skye Fortier
- Department of Chemistry, University of Texas at El Paso, El Paso, TX 79968
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26
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Naktode K, Das S, Bhattacharjee J, Nayek HP, Panda TK. Imidazolin-2-iminato Ligand-Supported Titanium Complexes as Catalysts for the Synthesis of Urea Derivatives. Inorg Chem 2016; 55:1142-53. [PMID: 26789927 DOI: 10.1021/acs.inorgchem.5b02302] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reactions of tetrakis(dimethylamido)titanium(IV) [Ti(NMe2)4] with three different imidazolin-2-imines (Im(R)NH; R = tert-butyl (tBu), mesityl (Mes), and 2,6-diisopropylphenyl (Dipp)) afforded the corresponding titanium imidazolin-2-iminato complexes [(Im(R)N)Ti(NMe2)3] (R = tBu, 1a; R = Mes, 1b; R = Dipp, 1c). Treatment of complex 1a with two different carbodiimides [R'N═C═NR'; R' = cyclohexyl (Cy) and isopropyl (iPr)] resulted in the formation of imidazolin-2-iminato titanium mono(guanidinate) complex of the type [(Im(R)N)Ti(R'NC(NMe2)NR') (NMe2)2 (R' = iPr; R = tBu (2a), R = Dipp (2c); R' = Cy, R = tBu (3a)], as yellow solid in 94% yield. However, a similar reaction of 1b and 1c with 2 equiv of phenyl isocyanates at ambient temperature resulted in the formation of corresponding titanium bis(ureate) complexes [(Im(R)N)Ti{κ(2)-OC(NMe2)NPh}2(NMe2)] (R = Mes, 4b and R = Dipp, 4c). Three equivalents of phenyl isothiocyanate reacted with complex 1c to afford respective titanium tris(thioureate) complex [(Im(Dipp)N)Ti{κ(2)-SC(NMe2)NPh}2{κ(1)-SC(NMe2)NPh}] (6c). The molecular structures of 1a-c, 2a, 2c, 3a, 4c, and 6c were established by X-ray diffraction analyses, and, from the solid-state structures of 1a-c, 2a, 2c, 3a, 4c, and 6c, it was confirmed that the imidazolin-2-iminato titanium bond in each case is very short and possesses a multiple-bonding character. The imidazolin-2-iminato titanium complex 1c was utilized as a precatalyst for the addition of amine N-H bond to phenyl isocyanate. High yields of the corresponding urea derivatives were achieved under mild conditions. The mechanistic study of the aforementioned catalytic reaction was performed, and the active catalyst complex 7b was isolated using 2 equiv of iminopyrrole [2-(2,6-iPr2C6H3N═CH)C4H3NH] and the complex 4b. The molecular structure of 7b was thereafter established.
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Affiliation(s)
- Kishor Naktode
- Department of Chemistry, Indian Institute of Technology Hyderabad , Kandi Sangareddy, 502 285 Telangana, India
| | - Suman Das
- Department of Chemistry, Indian Institute of Technology Hyderabad , Kandi Sangareddy, 502 285 Telangana, India
| | - Jayeeta Bhattacharjee
- Department of Chemistry, Indian Institute of Technology Hyderabad , Kandi Sangareddy, 502 285 Telangana, India
| | - Hari Pada Nayek
- Department of Applied Chemistry, Indian School of Mines , Dhanbad, 826004 Jharkhand, India
| | - Tarun K Panda
- Department of Chemistry, Indian Institute of Technology Hyderabad , Kandi Sangareddy, 502 285 Telangana, India
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27
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Bogojeski J, Volbeda J, Bugarčić ŽD, Freytag M, Tamm M. Platinum(ii) complexes with hybrid amine-imidazolin-2-imine ligands and their reactivity toward bio-molecules. NEW J CHEM 2016. [DOI: 10.1039/c5nj03360h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Two new Pt(ii) complexes with imidazolin-2-imines as ancillary ligands were synthesized and characterized and their reactivity toward bio-molecules was tested.
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Affiliation(s)
- Jovana Bogojeski
- Faculty of Science
- University of Kragujevac
- 34000 Kragujevac
- Serbia
| | - Jeroen Volbeda
- Institut für Anorganische und Analytische Chemie
- Technische Universität Braunschweig
- 38106 Braunschweig
- Germany
| | | | - Matthias Freytag
- Institut für Anorganische und Analytische Chemie
- Technische Universität Braunschweig
- 38106 Braunschweig
- Germany
| | - Matthias Tamm
- Institut für Anorganische und Analytische Chemie
- Technische Universität Braunschweig
- 38106 Braunschweig
- Germany
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28
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Yang J, Xie Z. Synthesis, structure and reactivity of rare-earth metallacarborane alkyls [η(1):η(5)-O(CH2)2C2B9H9]Ln(σ:η(1)-CH2C6H4-o-NMe2)(THF)2. Dalton Trans 2015; 44:6630-7. [PMID: 25758030 DOI: 10.1039/c5dt00095e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rare-earth metallacarborane alkyls can be stabilized by the incorporation of a functional sidearm into both π and σ ligands. Reaction of [Me3NH][7,8-O(CH2)2-7,8-C2B9H10] with one equiv. of Ln(CH2C6H4-o-NMe2)3 gave metallacarborane alkyls [η(1):η(5)-O(CH2)2C2B9H9]Ln(σ:η(1)-CH2C6H4-o-NMe2)(THF)2 (Ln = Y (), Gd (), Er ()) via alkane elimination. They represent the first examples of rare-earth metallacarborane alkyls. Treatment of with RN[double bond, length as m-dash]C[double bond, length as m-dash]NR (R = Cy, (i)Pr) or 2-benzoylpyridine afforded the corresponding mono-insertion products [η(1):η(5)-O(CH2)2C2B9H9]Y[η(2)-(RN)2C(CH2C6H4-o-NMe2)](DME) (R = Cy (), (i)Pr ()) or [η(1):η(5)-O(CH2)2C2B9H9]Y[C5H4NC(Ph)(CH2C6H4-o-NMe2)O](THF)2 (), respectively. Complex also reacted with ArNCO or ArNC (Ar = 2,6-diisopropylphenyl, 2,6-dimethylphenyl) to give di-insertion products [η(1):η(5)-O(CH2)2C2B9H9]Y[OC([double bond, length as m-dash]NC6H3Me2)N(C6H3Me2)C(CH2C6H4-o-NMe2)O](THF)2 () or [η(1):η(5)-O(CH2)2C2B9H9]Y[C([double bond, length as m-dash]NC6H3(i)Pr2)C([double bond, length as m-dash]NC6H3(i)Pr2)(CH2C6H4-o-NMe2)](DME) (). These results showed that the reactivity pattern of the Ln-C σ bond in rare-earth metallacarborane alkyls was dependent on the nature of the unsaturated organic molecules. New complexes were characterized by various spectroscopic techniques and elemental analysis. Some were further confirmed by single-crystal X-ray analysis.
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Affiliation(s)
- Jingying Yang
- Department of Chemistry, Center of Novel Functional Molecules and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China.
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29
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Schädle D, Meermann-Zimmermann M, Schädle C, Maichle-Mössmer C, Anwander R. Rare-Earth Metal Complexes with Terminal Imido Ligands. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500045] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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30
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Bogojeski J, Volbeda J, Freytag M, Tamm M, Bugarčić ŽD. Palladium(ii) complexes with highly basic imidazolin-2-imines and their reactivity toward small bio-molecules. Dalton Trans 2015; 44:17346-59. [DOI: 10.1039/c5dt02307f] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pd(ii) complexes with chelating imidazolin-2-imine ligands were synthesized, and the pKa values and reactivity of these complexes were investigated.
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Affiliation(s)
- Jovana Bogojeski
- Department of Chemistry
- Faculty of Science
- University of Kragujevac
- 34000 Kragujevac
- Serbia
| | - Jeroen Volbeda
- Institut für Anorganische und Analytische Chemie
- Technische Universität Braunschweig
- 38106 Braunschweig
- Germany
| | - Matthias Freytag
- Institut für Anorganische und Analytische Chemie
- Technische Universität Braunschweig
- 38106 Braunschweig
- Germany
| | - Matthias Tamm
- Institut für Anorganische und Analytische Chemie
- Technische Universität Braunschweig
- 38106 Braunschweig
- Germany
| | - Živadin D. Bugarčić
- Department of Chemistry
- Faculty of Science
- University of Kragujevac
- 34000 Kragujevac
- Serbia
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31
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Naktode K, Bhattacharjee J, Nayek HP, Panda TK. Imidazol-2-ylidene-N′-phenylureate ligands in alkali and alkaline earth metal coordination spheres – heterocubane core to polymeric structural motif formation. Dalton Trans 2015; 44:7458-69. [DOI: 10.1039/c5dt00490j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthetic and structural details of imidazol-2-ylidene-N′-phenylureate ligand supported two potassium complexes with a hetero-cubane K4O4 core and a polymeric structure, along with a mixed metal Ca–K complex are presented.
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Affiliation(s)
- Kishor Naktode
- Department of Chemistry
- Indian Institute of Technology Hyderabad
- Yeddumailaram 502205
- India
| | - Jayeeta Bhattacharjee
- Department of Chemistry
- Indian Institute of Technology Hyderabad
- Yeddumailaram 502205
- India
| | - Hari Pada Nayek
- Department of Applied Chemistry
- Indian School of Mines
- Dhanbad
- India
| | - Tarun K. Panda
- Department of Chemistry
- Indian Institute of Technology Hyderabad
- Yeddumailaram 502205
- India
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32
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Karmel ISR, Khononov M, Tamm M, Eisen MS. Uranium-mediated ring-opening polymerization of ε-caprolactone: a comparative study. Catal Sci Technol 2015. [DOI: 10.1039/c5cy01162k] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
This study shows and compares the catalytic activity and the mechanism of the uranium complexes [(ImDippN)2U(NMeEt)2] (3), [(C5Me5)2U(NMe2)2] (4) and [(C5Me5)2U(NCMePh)2] (5) in the ring-opening polymerization of ε-caprolactone, among which the bis(imidazolin-2-iminato) uranium complex3displayed the highest catalytic activity.
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Affiliation(s)
- Isabell S. R. Karmel
- Schulich Faculty of Chemistry
- Institute of Catalysis Science and Technology
- Technion – Israel Institute of Technology
- Technion City
- Haifa
| | - Maxim Khononov
- Schulich Faculty of Chemistry
- Institute of Catalysis Science and Technology
- Technion – Israel Institute of Technology
- Technion City
- Haifa
| | - Matthias Tamm
- Institut für Anorganische und Analytische Chemie
- Technische Universität Braunschweig
- 38106 Braunschweig
- Germany
| | - Moris S. Eisen
- Schulich Faculty of Chemistry
- Institute of Catalysis Science and Technology
- Technion – Israel Institute of Technology
- Technion City
- Haifa
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33
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Nomura K, Bahuleyan BK, Tsutsumi K, Igarashi A. Synthesis of (Imido)vanadium(V) Alkyl and Alkylidene Complexes Containing Imidazolidin-2-iminato Ligands: Effect of Imido Ligand on ROMP and 1,2-C–H Bond Activation of Benzene. Organometallics 2014. [DOI: 10.1021/om500986m] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Kotohiro Nomura
- Department of Chemistry, Tokyo Metropolitan University, Minami Osawa 1-1, Hachioji, Tokyo 192-0397, Japan
| | - Bijal Kottukkal Bahuleyan
- Department of Chemistry, Tokyo Metropolitan University, Minami Osawa 1-1, Hachioji, Tokyo 192-0397, Japan
| | - Ken Tsutsumi
- Department of Chemistry, Tokyo Metropolitan University, Minami Osawa 1-1, Hachioji, Tokyo 192-0397, Japan
| | - Atsushi Igarashi
- Department of Chemistry, Tokyo Metropolitan University, Minami Osawa 1-1, Hachioji, Tokyo 192-0397, Japan
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34
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Franz D, Irran E, Inoue S. Isolierung eines dreifach koordinierten Borkations mit einer Bor-Schwefel-Doppelbindung. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201407809] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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35
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Franz D, Irran E, Inoue S. Isolation of a Three-Coordinate Boron Cation with a Boron-Sulfur Double Bond. Angew Chem Int Ed Engl 2014; 53:14264-8. [DOI: 10.1002/anie.201407809] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Indexed: 11/08/2022]
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36
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Volbeda J, Jones PG, Tamm M. Preparation of chiral imidazolin-2-imine ligands and their application in ruthenium-catalyzed transfer hydrogenation. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.06.026] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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37
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Scandium terminal imido complex induced intramolecular C-N bond cleavage and transformation. Sci China Chem 2014. [DOI: 10.1007/s11426-014-5117-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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38
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Franz D, Inoue S. Systematic Investigation of the Ring-Expansion Reaction of N-Heterocyclic Carbenes with an Iminoborane Dihydride. Chem Asian J 2014; 9:2083-7. [DOI: 10.1002/asia.201402233] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Indexed: 11/08/2022]
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39
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Franz D, Inoue S. Activation of Elemental Sulfur by Aluminum Dihydride: Isolation of Mono- and Bis(hydrogensulfide) Complexes of Aluminum. Chemistry 2014; 20:10645-9. [DOI: 10.1002/chem.201402293] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Indexed: 11/12/2022]
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40
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Wu X, Tamm M. Transition metal complexes supported by highly basic imidazolin-2-iminato and imidazolin-2-imine N-donor ligands. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2013.10.007] [Citation(s) in RCA: 128] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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41
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Franz D, Irran E, Inoue S. Synthesis, characterization and reactivity of an imidazolin-2-iminato aluminium dihydride. Dalton Trans 2014; 43:4451-61. [DOI: 10.1039/c3dt52637b] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Nomura K, Bahuleyan BK, Zhang S, Veeresha Sharma PM, Katao S, Igarashi A, Inagaki A, Tamm M. Synthesis and Structural Analysis of (Imido)vanadium(V) Dichloride Complexes Containing Imidazolin-2-iminato- and Imidazolidin-2-iminato Ligands, and their Use as Catalyst Precursors for Ethylene (Co)polymerization. Inorg Chem 2013; 53:607-23. [DOI: 10.1021/ic402747d] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Kotohiro Nomura
- Department
of Chemistry, Tokyo Metropolitan University, Minami-Osawa 1-1, Hachioji, Tokyo 192-0397, Japan
- Graduate
School of Materials Science, Nara Institute of Science and Technology, Ikoma, Nara 630-0101, Japan
| | - Bijal Kottukkal Bahuleyan
- Department
of Chemistry, Tokyo Metropolitan University, Minami-Osawa 1-1, Hachioji, Tokyo 192-0397, Japan
| | - Shu Zhang
- Department
of Chemistry, Tokyo Metropolitan University, Minami-Osawa 1-1, Hachioji, Tokyo 192-0397, Japan
- Graduate
School of Materials Science, Nara Institute of Science and Technology, Ikoma, Nara 630-0101, Japan
| | | | - Shohei Katao
- Graduate
School of Materials Science, Nara Institute of Science and Technology, Ikoma, Nara 630-0101, Japan
| | - Atsushi Igarashi
- Department
of Chemistry, Tokyo Metropolitan University, Minami-Osawa 1-1, Hachioji, Tokyo 192-0397, Japan
| | - Akiko Inagaki
- Graduate
School of Materials Science, Nara Institute of Science and Technology, Ikoma, Nara 630-0101, Japan
| | - Matthias Tamm
- Institut
für
Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring
30, 38106 Braunschweig, Germany
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43
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Rong W, Cheng J, Mou Z, Xie H, Cui D. Facile Preparation of a Scandium Terminal Imido Complex Supported by a Phosphazene Ligand. Organometallics 2013. [DOI: 10.1021/om400803q] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Weifeng Rong
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100039, People’s Republic of China
| | - Jianhua Cheng
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
| | - Zehuai Mou
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100039, People’s Republic of China
| | - Hongyan Xie
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100039, People’s Republic of China
| | - Dongmei Cui
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
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44
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Dielmann F, Moore CE, Rheingold AL, Bertrand G. Crystalline, Lewis Base-Free, Cationic Phosphoranimines (Iminophosphonium Salts). J Am Chem Soc 2013; 135:14071-3. [DOI: 10.1021/ja4080979] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Fabian Dielmann
- UCSD-CNRS Joint Research
Chemistry Laboratory (UMI 3555), Department of Chemistry and Biochemistry, University of California−San Diego, La Jolla, California 92093-0343, United States
| | - Curtis E. Moore
- UCSD-CNRS Joint Research
Chemistry Laboratory (UMI 3555), Department of Chemistry and Biochemistry, University of California−San Diego, La Jolla, California 92093-0343, United States
| | - Arnold L. Rheingold
- UCSD-CNRS Joint Research
Chemistry Laboratory (UMI 3555), Department of Chemistry and Biochemistry, University of California−San Diego, La Jolla, California 92093-0343, United States
| | - Guy Bertrand
- UCSD-CNRS Joint Research
Chemistry Laboratory (UMI 3555), Department of Chemistry and Biochemistry, University of California−San Diego, La Jolla, California 92093-0343, United States
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45
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Tskhovrebov AG, Solari E, Scopelliti R, Severin K. Insertion of Zerovalent Nickel into the N–N Bond of N-Heterocyclic-Carbene-Activated N2O. Inorg Chem 2013; 52:11688-90. [DOI: 10.1021/ic401524w] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Alexander G. Tskhovrebov
- Institut des Sciences
et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Euro Solari
- Institut des Sciences
et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Rosario Scopelliti
- Institut des Sciences
et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Kay Severin
- Institut des Sciences
et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
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46
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Tskhovrebov AG, Vuichoud B, Solari E, Scopelliti R, Severin K. Adducts of Nitrous Oxide and N-Heterocyclic Carbenes: Syntheses, Structures, and Reactivity. J Am Chem Soc 2013; 135:9486-92. [DOI: 10.1021/ja4030287] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Alexander G. Tskhovrebov
- Institut des Sciences et Ingénierie
Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Basile Vuichoud
- Institut des Sciences et Ingénierie
Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Euro Solari
- Institut des Sciences et Ingénierie
Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Rosario Scopelliti
- Institut des Sciences et Ingénierie
Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Kay Severin
- Institut des Sciences et Ingénierie
Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
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47
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Lanthanides and actinides: Annual survey of their organometallic chemistry covering the year 2011. Coord Chem Rev 2013. [DOI: 10.1016/j.ccr.2012.12.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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48
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Summerscales OT, Gordon JC. Complexes containing multiple bonding interactions between lanthanoid elements and main-group fragments. RSC Adv 2013. [DOI: 10.1039/c3ra23151h] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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49
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Zhang J, Yi W, Chen Z, Zhou X. Room temperature C–N bond cleavage of anionic guanidinate ligand in rare-earth metal complexes. Dalton Trans 2013; 42:5826-31. [DOI: 10.1039/c3dt00014a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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50
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Ethylene copolymerization by half-titanocenes containing imidazolin-2-iminato ligands–MAO catalyst systems. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcata.2012.08.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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