1
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Lachguar A, Del Rosal I, Maron L, Jeanneau E, Veyre L, Thieuleux C, Camp C. π-Bonding of Group 11 Metals to a Tantalum Alkylidyne Alkyl Complex Promotes Unusual Tautomerism to Bis-alkylidene and CO 2 to Ketenyl Transformation. J Am Chem Soc 2024. [PMID: 38936814 DOI: 10.1021/jacs.4c02172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2024]
Abstract
A salt metathesis synthetic strategy is used to access rare tantalum/coinage metal (Cu, Ag, Au) heterobimetallic complexes. Specifically, complex [Li(THF)2][Ta(CtBu)(CH2tBu)3], 1, reacts with (IPr)MCl (M = Cu, Ag, Au, IPr = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene) to afford the alkylidyne-bridged species [Ta(CH2tBu)3(μ-CtBu)M(IPr)] 2-M. Interestingly, π-bonding of group 11 metals to the Ta─C moiety promotes a rare alkylidyne alkyl to bis-alkylidene tautomerism, in which compounds 2-M are in equilibrium with [Ta(CHtBu)(CH2tBu)2(μ-CHtBu)M(IPr)] 3-M. This equilibrium was studied in detail using NMR spectroscopy and computational studies. This reveals that the equilibrium position is strongly dependent on the nature of the coinage metal going down the group 11 triad, thus offering a new valuable avenue for controlling this phenomenon. Furthermore, we show that these uncommon bimetallic couples could open attractive opportunities for synergistic reactivity. We notably report an uncommon deoxygenative carbyne transfer to CO2 resulting in rare examples of coinage metal ketenyl species, (tBuCCO)M(IPr), 4-M (M = Cu, Ag, Au). In the case of the Ta/Li analogue 1, the bis(alkylidene) tautomer is not detected, and the reaction with CO2 does not cleanly yield ketenyl species, which highlights the pivotal role played by the coinage metal partner in controlling these unconventional reactions.
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Affiliation(s)
- Abdelhak Lachguar
- Laboratory of Catalysis, Polymerization, Processes and Materials (CP2M UMR 5128), CNRS, Universite Claude Bernard Lyon 1, CPE-Lyon, Institut de Chimie de Lyon, 43 Bd du 11 Novembre 1918, Villeurbanne F-69616, France
| | - Iker Del Rosal
- CNRS, INSA, UPS, UMR 5215, LPCNO, Université de Toulouse, 135 Avenue de Rangueil, Toulouse F-31077, France
| | - Laurent Maron
- CNRS, INSA, UPS, UMR 5215, LPCNO, Université de Toulouse, 135 Avenue de Rangueil, Toulouse F-31077, France
| | - Erwann Jeanneau
- Centre de Diffractométrie Henri Longchambon, Université de Lyon, 5 Rue de la Doua, Villeurbanne 69100, France
| | - Laurent Veyre
- Laboratory of Catalysis, Polymerization, Processes and Materials (CP2M UMR 5128), CNRS, Universite Claude Bernard Lyon 1, CPE-Lyon, Institut de Chimie de Lyon, 43 Bd du 11 Novembre 1918, Villeurbanne F-69616, France
| | - Chloé Thieuleux
- Laboratory of Catalysis, Polymerization, Processes and Materials (CP2M UMR 5128), CNRS, Universite Claude Bernard Lyon 1, CPE-Lyon, Institut de Chimie de Lyon, 43 Bd du 11 Novembre 1918, Villeurbanne F-69616, France
| | - Clément Camp
- Laboratory of Catalysis, Polymerization, Processes and Materials (CP2M UMR 5128), CNRS, Universite Claude Bernard Lyon 1, CPE-Lyon, Institut de Chimie de Lyon, 43 Bd du 11 Novembre 1918, Villeurbanne F-69616, France
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2
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Lin X, Mo Y. Partial Double Metal-Carbon Bonding Model in Transition Metal Methyl Compounds. Inorg Chem 2022; 61:2892-2902. [PMID: 35104122 DOI: 10.1021/acs.inorgchem.1c03619] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The chemical bond between a transition metal and a methyl group (M-CH3) is typically defined as a single covalent bond, which is of fundamental significance and general interest in understanding the structural properties and reactivity of transition metal alkyl compounds. Herein, we demonstrate that the M-CH3 bonding involves varying σ and π components and thus should be best described in terms of the partial double M═CH3 bond. The often-neglected π bonding stems from an occupied π-symmetric orbital of the methyl group comprising all three C-H σ bonds (but one C-H' contributes more than the other two) and a vacant low-lying metal d(π) orbital, and is associated with the intramolecular C-H'···M agostic effect (i.e., an acute M-C-H' angle and a short H'···M distance), whose origin is still controversial. We quantify the geometric and energetic impacts of the π interaction involved in the M-CH3 bond by explicitly computing the intramolecular πCH' → dM interaction with the ab initio valence bond (VB) theory. Our computations of the ligand-free [TiCH3]3+ and a series of metallocene catalysts provide a direct proof for the presence of the π bonding in M-CH3 bonds, which is the cause for the agostic effect. The partial double M═CH3 bonding model is not only validated by a range of bonding analyses including VB self-consistent field (VBSCF)-based energy decomposition and quantum theory of atoms in molecules (QTAIM) but also authenticated by the specific activity of double M═CH3 bonds in the C-H activation and olefin insertion. More importantly, the σ bond gradually switches from a classical covalent bond to a novel charge-shift bond with the π bonding becoming increasingly significant. We anticipate that the recognition of the π interaction between electrophilic metal centers and C-H bonds can benefit the understanding of the nature of metal-carbon bonds in transition metal ethyl, alkyl, and carbene compounds.
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Affiliation(s)
- Xuhui Lin
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
| | - Yirong Mo
- Department of Nanoscience, Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro, Greensboro, North Carolina 27401, United States
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3
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Srivastava R, Quadrelli EA, Camp C. Lability of Ta–NHC adducts as a synthetic route towards heterobimetallic Ta/Rh complexes. Dalton Trans 2020; 49:3120-3128. [DOI: 10.1039/d0dt00344a] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work highlights the reactivity of Ta–NHC adducts and the aptitude of the NHC motif to transfer from Ta to Rh which is used with profit as an efficient synthetic route to access early/late heterobimetallic complexes.
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Affiliation(s)
- Ravi Srivastava
- Université de Lyon
- Institut de Chimie de Lyon
- C2P2 UMR 5265 CNRS
- F-69616 Villeurbanne
- France
| | | | - Clément Camp
- Université de Lyon
- Institut de Chimie de Lyon
- C2P2 UMR 5265 CNRS
- F-69616 Villeurbanne
- France
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4
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Srivastava R, Moneuse R, Petit J, Pavard PA, Dardun V, Rivat M, Schiltz P, Solari M, Jeanneau E, Veyre L, Thieuleux C, Quadrelli EA, Camp C. Early/Late Heterobimetallic Tantalum/Rhodium Species Assembled Through a Novel Bifunctional NHC-OH Ligand. Chemistry 2018; 24:4361-4370. [DOI: 10.1002/chem.201705507] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Indexed: 01/17/2023]
Affiliation(s)
- Ravi Srivastava
- C2P2 UMR 5265, Institut de Chimie de Lyon; Université de Lyon, CNRS, Université Lyon 1, ESCPE Lyon; 43 Bd du 11 Novembre 1918 F-69616 Villeurbanne France
| | - Raphaël Moneuse
- C2P2 UMR 5265, Institut de Chimie de Lyon; Université de Lyon, CNRS, Université Lyon 1, ESCPE Lyon; 43 Bd du 11 Novembre 1918 F-69616 Villeurbanne France
| | - Julien Petit
- C2P2 UMR 5265, Institut de Chimie de Lyon; Université de Lyon, CNRS, Université Lyon 1, ESCPE Lyon; 43 Bd du 11 Novembre 1918 F-69616 Villeurbanne France
| | - Paul-Alexis Pavard
- C2P2 UMR 5265, Institut de Chimie de Lyon; Université de Lyon, CNRS, Université Lyon 1, ESCPE Lyon; 43 Bd du 11 Novembre 1918 F-69616 Villeurbanne France
| | - Vincent Dardun
- C2P2 UMR 5265, Institut de Chimie de Lyon; Université de Lyon, CNRS, Université Lyon 1, ESCPE Lyon; 43 Bd du 11 Novembre 1918 F-69616 Villeurbanne France
| | - Madleen Rivat
- C2P2 UMR 5265, Institut de Chimie de Lyon; Université de Lyon, CNRS, Université Lyon 1, ESCPE Lyon; 43 Bd du 11 Novembre 1918 F-69616 Villeurbanne France
| | - Pauline Schiltz
- C2P2 UMR 5265, Institut de Chimie de Lyon; Université de Lyon, CNRS, Université Lyon 1, ESCPE Lyon; 43 Bd du 11 Novembre 1918 F-69616 Villeurbanne France
| | - Marius Solari
- C2P2 UMR 5265, Institut de Chimie de Lyon; Université de Lyon, CNRS, Université Lyon 1, ESCPE Lyon; 43 Bd du 11 Novembre 1918 F-69616 Villeurbanne France
| | - Erwann Jeanneau
- Centre de Diffractométrie Henri Longchambon; Université de Lyon, Université Lyon 1, Site CLEA-Bâtiment ISA; 5 rue de la Doua 69100 Villeurbanne France
| | - Laurent Veyre
- C2P2 UMR 5265, Institut de Chimie de Lyon; Université de Lyon, CNRS, Université Lyon 1, ESCPE Lyon; 43 Bd du 11 Novembre 1918 F-69616 Villeurbanne France
| | - Chloé Thieuleux
- C2P2 UMR 5265, Institut de Chimie de Lyon; Université de Lyon, CNRS, Université Lyon 1, ESCPE Lyon; 43 Bd du 11 Novembre 1918 F-69616 Villeurbanne France
| | - Elsje Alessandra Quadrelli
- C2P2 UMR 5265, Institut de Chimie de Lyon; Université de Lyon, CNRS, Université Lyon 1, ESCPE Lyon; 43 Bd du 11 Novembre 1918 F-69616 Villeurbanne France
| | - Clément Camp
- C2P2 UMR 5265, Institut de Chimie de Lyon; Université de Lyon, CNRS, Université Lyon 1, ESCPE Lyon; 43 Bd du 11 Novembre 1918 F-69616 Villeurbanne France
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5
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Manßen M, Lauterbach N, Dörfler J, Schmidtmann M, Saak W, Doye S, Beckhaus R. Effizienter Zugang zu Titanaaziridinen durch C-H-Aktivierung vonN-Methylanilinen bei Raumtemperatur. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201500796] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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6
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Manßen M, Lauterbach N, Dörfler J, Schmidtmann M, Saak W, Doye S, Beckhaus R. Efficient access to titanaaziridines by C-H activation of N-methylanilines at ambient temperature. Angew Chem Int Ed Engl 2015; 54:4383-7. [PMID: 25783181 DOI: 10.1002/anie.201500796] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Indexed: 11/10/2022]
Abstract
Titanaaziridines or η(2)-imine titanium complexes are considered key intermediates of the titanium-catalyzed hydroaminoalkylation of alkenes. Herein, we present an efficient synthetic route to this class of compounds, starting from N-methylanilines and a bis(η(5):η(1)-pentafulvene)titanium complex. Consecutive reactions on the η(2)-methyleneaniline complexes, characterized for the first time, prove a high chemical versatility. In particular, hydroaminoalkylation products were found in reactions of the three-membered titanacycles with alkenes. For the first time, all the intermediates of the hydroaminoalkylation of alkenes were isolated and characterized.
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Affiliation(s)
- Manfred Manßen
- Institut für Chemie, Fakultät für Mathematik und Naturwissenschaften, Carl von Ossietzky Universität Oldenburg, Postfach 2503, 26111 Oldenburg (Germany)
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7
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Loose F, Plettenberg I, Haase D, Saak W, Schmidtmann M, Schäfer A, Müller T, Beckhaus R. Aromatic Imines in the Titanocene Coordination Sphere—Titanaaziridine vs 1-Aza-2-titanacyclopent-4-ene Structures. Organometallics 2014. [DOI: 10.1021/om500750y] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Florian Loose
- Institute of Chemistry, Carl von Ossietzky University Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
| | - Inka Plettenberg
- Institute of Chemistry, Carl von Ossietzky University Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
| | - Detlev Haase
- Institute of Chemistry, Carl von Ossietzky University Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
| | - Wolfgang Saak
- Institute of Chemistry, Carl von Ossietzky University Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
| | - Marc Schmidtmann
- Institute of Chemistry, Carl von Ossietzky University Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
| | - André Schäfer
- Institute of Chemistry, Carl von Ossietzky University Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
| | - Thomas Müller
- Institute of Chemistry, Carl von Ossietzky University Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
| | - Rüdiger Beckhaus
- Institute of Chemistry, Carl von Ossietzky University Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
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8
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Galájov M, Garcı́a C, Gómez M, Gómez-Sal P, Temprado M. Synthesis and DFT, Multinuclear Magnetic Resonance, and X-ray Structural Studies of Iminoacyl Imido Hydridotris(3,5-dimethylpyrazolyl)borate Niobium and Tantalum(V) Complexes. Organometallics 2014. [DOI: 10.1021/om5002028] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Miguel Galájov
- Centro de Espectroscopia de RMN, ‡Departamento de Quı́mica Orgánica
y Quı́mica Inorgánica and §Departamento de Quı́mica
Analítica, Quı́mica Física e Ingeniería
Quı́mica, Universidad de Alcalá, Campus Universitario, E-28871 Alcalá de Henares, Spain
| | - Carlos Garcı́a
- Centro de Espectroscopia de RMN, ‡Departamento de Quı́mica Orgánica
y Quı́mica Inorgánica and §Departamento de Quı́mica
Analítica, Quı́mica Física e Ingeniería
Quı́mica, Universidad de Alcalá, Campus Universitario, E-28871 Alcalá de Henares, Spain
| | - Manuel Gómez
- Centro de Espectroscopia de RMN, ‡Departamento de Quı́mica Orgánica
y Quı́mica Inorgánica and §Departamento de Quı́mica
Analítica, Quı́mica Física e Ingeniería
Quı́mica, Universidad de Alcalá, Campus Universitario, E-28871 Alcalá de Henares, Spain
| | - Pilar Gómez-Sal
- Centro de Espectroscopia de RMN, ‡Departamento de Quı́mica Orgánica
y Quı́mica Inorgánica and §Departamento de Quı́mica
Analítica, Quı́mica Física e Ingeniería
Quı́mica, Universidad de Alcalá, Campus Universitario, E-28871 Alcalá de Henares, Spain
| | - Manuel Temprado
- Centro de Espectroscopia de RMN, ‡Departamento de Quı́mica Orgánica
y Quı́mica Inorgánica and §Departamento de Quı́mica
Analítica, Quı́mica Física e Ingeniería
Quı́mica, Universidad de Alcalá, Campus Universitario, E-28871 Alcalá de Henares, Spain
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9
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Galájov M, García C, Gómez M, Gómez-Sal P. Alkyl chlorido hydridotris(3,5-dimethylpyrazolyl)borate imido niobium and tantalum(V) complexes: synthesis, conformational states of alkyl groups in solid and solution, X-ray diffraction and multinuclear magnetic resonance spectroscopy studies. Dalton Trans 2014; 43:5747-58. [PMID: 24573068 DOI: 10.1039/c3dt53353k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The alkylation of the starting pseudooctahedral dichlorido imido hydridotris(3,5-dimethylpyrazolyl)borate niobium and tantalum(v) compounds [MTp*Cl2(NtBu)] (M = Nb,Ta; Tp* = BH(3,5-Me2C3HN2)3) with MgClR in different conditions led to new alkyl chlorido imido derivatives [MTp*ClR(NtBu)] (M = Nb/Ta, R = CH2CH31a/1b, CH2Ph 2a/2b, CH2tBu 3a/3b, CH2SiMe34a/4b, CH2CMe2Ph 5a/5b), whereas the dimethyl derivatives [MTp*Me2(NtBu)] (M = Nb 6a, Ta 6b) could be isolated as unitary species when the reaction was carried out using 2 equivalents of the magnesium reagent MgClMe. However, the chlorido methyl [MTp*ClMe(NtBu)] (M = Nb 7a, Ta 7b) complexes were obtained by heating at 50 °C the dichlorido and dimethyl imido complexes mixtures in a 1 : 1 ratio. All of the complexes were studied by multinuclear magnetic resonance spectroscopy and the molecular structures of 1b, 2a/b, 3a/b, 4a and 5a/b were determined by X-ray diffraction methods. In the solid state the complexes 1b, 4a and 5a exhibit only a gauche-anti conformation and the complexes 2a/b, 3a/b and 5b exhibit only a gauche-syn conformation of the alkyl substituents, whereas both conformational states, which do not show mutual exchange in the NMR time scale, were observed for 3a/b in a benzene-d6 solution. The (15)N chemical shifts of the complexes 1-7 are discussed.
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Affiliation(s)
- Miguel Galájov
- Centro de Espectroscopia de RMN, Universidad de Alcalá, Campus Universitario, E-28871 Alcalá de Henares, Spain
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10
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Elorriaga D, Galajov M, Garcı́a C, Gómez M, Gómez-Sal P. Hydridotris(3,5-dimethylpyrazolyl)borate Dimethylamido Imido Niobium and Tantalum Complexes: Synthesis, Reactivity, Fluxional Behavior, and C–H Activation of the NMe2 Function. Organometallics 2012. [DOI: 10.1021/om300437e] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- David Elorriaga
- Departamento de Quı́mica Inorgánica and ‡Centro
de Espectroscopia de RMN, Universidad de Alcalá,
Campus Universitario, E-28871 Alcalá de Henares, Spain
| | - Miguel Galajov
- Departamento de Quı́mica Inorgánica and ‡Centro
de Espectroscopia de RMN, Universidad de Alcalá,
Campus Universitario, E-28871 Alcalá de Henares, Spain
| | - Carlos Garcı́a
- Departamento de Quı́mica Inorgánica and ‡Centro
de Espectroscopia de RMN, Universidad de Alcalá,
Campus Universitario, E-28871 Alcalá de Henares, Spain
| | - Manuel Gómez
- Departamento de Quı́mica Inorgánica and ‡Centro
de Espectroscopia de RMN, Universidad de Alcalá,
Campus Universitario, E-28871 Alcalá de Henares, Spain
| | - Pilar Gómez-Sal
- Departamento de Quı́mica Inorgánica and ‡Centro
de Espectroscopia de RMN, Universidad de Alcalá,
Campus Universitario, E-28871 Alcalá de Henares, Spain
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11
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Lauzon JMP, Schafer LL. Tantallaaziridines: from synthesis to catalytic applications. Dalton Trans 2012; 41:11539-50. [PMID: 22728652 DOI: 10.1039/c2dt30781b] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tantallaaziridines are a class of organometallic compounds containing three-membered rings that include a tantalum, carbon and nitrogen atom. Closely related complexes containing the related iminoacyl ligand can be used as starting materials for tantallaaziridine synthesis. Tantallaaziridines can also be synthesized by reduction of imines or β-hydrogen abstraction of amides to give stable, isolable complexes. Tantallaaziridines possess a reactive Ta-C bond that can undergo stoichiometric transformations with unsaturated organic molecules to give new organometallic products. Upon quenching of such reactions with aqueous workup, selectively substituted small molecule amines can be prepared. Tantallaaziridines have also been proposed as catalytic intermediates in the direct α-alkylation of amines, hydroaminoalkylation, by exploiting the β-hydrogen abstraction route to regenerate the catalytically active species. Recent progress and remaining challenges in the field will be discussed.
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Affiliation(s)
- Jean Michel P Lauzon
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, B.C., Canada V6T 1Z1
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12
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Morán Vieyra FE, Cattaneo M, Fagalde F, Bozoglián F, Llobet A, Katz NE. Influence of the linker length on the host–guest properties of alkoxy- and polypyridine-bridged molecular rectangles of formulae {[Re(CO)3(OC5H11)]4(L)2}, with L=4-pyridinealdazine and 4,4′-azobis(pyridine). Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.02.075] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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Michiue K, Oshiki T, Takai K, Mitani M, Fujita T. Tantalum Complexes Incorporating Tris(pyrazolyl)Borate Ligands: Syntheses, Structures, and Ethylene Polymerization Behavior. Organometallics 2009. [DOI: 10.1021/om9004719] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kenji Michiue
- Research Center, Mitsui Chemicals, Inc., 580-32 Nagaura, Sodegaura, Chiba 299-0265, Japan
| | - Toshiyuki Oshiki
- Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University, Tsushima, Kita-ku, Okayama 700-8530, Japan
| | - Kazuhiko Takai
- Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University, Tsushima, Kita-ku, Okayama 700-8530, Japan
| | - Makoto Mitani
- Research Center, Mitsui Chemicals, Inc., 580-32 Nagaura, Sodegaura, Chiba 299-0265, Japan
| | - Terunori Fujita
- Research Center, Mitsui Chemicals, Inc., 580-32 Nagaura, Sodegaura, Chiba 299-0265, Japan
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14
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García C, Gómez M, Gómez-Sal P, Hernández JM. Monocyclopentadienyl(niobium) Compounds with Imido and Silsesquioxane Ligands: Synthetic, Structural and Reactivity Studies. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200900571] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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15
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16
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Spencer LP, Beddie C, Hall MB, Fryzuk MD. Synthesis, Reactivity, and DFT Studies of Tantalum Complexes Incorporating Diamido-N-heterocyclic Carbene Ligands. Facile Endocyclic C−H Bond Activation. J Am Chem Soc 2006; 128:12531-43. [PMID: 16984204 DOI: 10.1021/ja063282x] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The syntheses of tantalum derivatives with the potentially tridentate diamido-N-heterocyclic carbene (NHC) ligand are described. Aminolysis and alkane elimination reactions with the diamine-NHC ligands, (Ar)[NCN]H(2) (where (Ar)[NCN]H(2) = (ArNHCH(2)CH(2))(2)(C(3)N(2)); Ar = Mes, p-Tol), provided complexes with a bidentate amide-amine donor configuration. Attempts to promote coordination of the remaining pendent amine donor were unsuccessful. Metathesis reactions with the dilithiated diamido-NHC ligand ((Ar)[NCN]Li(2)) and various Cl(x)Ta(NR'(2))(5-)(x) precursors were successful and generated the desired octahedral (Ar)[NCN]TaCl(x)(NR'(2))(3-)(x) complexes. Attempts to prepare trialkyl tantalum complexes by this methodology resulted in the formation of an unusual metallaaziridine derivative. DFT calculations on model complexes show that the strained metallaaziridine ring forms because it allows the remaining substituents to adopt preferable bonding positions. The calculations predict that the lowest energy pathway involves a tantalum alkylidene intermediate, which undergoes C-H bond activation alpha to the amido to form the metallaaziridine moiety. This mechanism was confirmed by examining the distribution of deuterium atoms in an experiment between (Mes)[NCN]Li(2) and Cl(2)Ta(CD(2)Ph)(3). The single-crystal X-ray structures of (p)(-Tol)[NCNH]Ta(NMe(2))(4) (3), (Mes)[NCNH]Ta=CHPh(CH(2)Ph)(2) (4), (p)(-Tol)[NCN]Ta(NMe(2))(3) (7), (Mes)[NCCN]Ta(CH(2)(t)Bu)(2) (11), and (Mes)[NCCN]TaCl(CH(2)(t)Bu) (14) are included.
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Affiliation(s)
- Liam P Spencer
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z
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17
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Manimaran B, Lai LJ, Thanasekaran P, Wu JY, Liao RT, Tseng TW, Liu YH, Lee GH, Peng SM, Lu KL. CH···π Interaction for Rhenium-Based Rectangles: An Interaction That Is Rarely Designed into a Host−Guest Pair. Inorg Chem 2006; 45:8070-7. [PMID: 16999404 DOI: 10.1021/ic0604720] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Alkoxy- and thiolato-bridged Re(I) molecular rectangles [{(CO)3Re(mu-ER)2Re(CO)3}2(mu-bpy)2] (ER = SC4H9, 1a; SC8H17, 1b; OC4H9, 2a; OC12H25, 2b; bpy = 4,4'-bipyridine) exhibit strong interactions with several planar aromatic molecules. The nature of their binding was studied by spectral techniques and verified by X-ray diffraction analysis. Standard absorption and fluorescence titrations showed that a relatively strong 1:1 interaction occurs between aromatic guests such as pyrene and these rectangles. The results of a single-crystal X-ray diffraction analysis show that the recognition of 1 with a pyrene molecule is mainly due to CH...pi interactions and the face of the guest pyrene is located over the edges of the bpy linkers of 1. This is a fairly novel example of an interaction that is rarely designed into a host-guest pair. Furthermore, the interaction of 1 with Ag+ results in the self-organization of supramolecular arrays, as revealed by solid-state data.
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Affiliation(s)
- Bala Manimaran
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan
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Poater A, Solans-Monfort X, Clot E, Copéret C, Eisenstein O. DFT calculations of d0M(NR)(CHtBu)(X)(Y) (M = Mo, W; R = CPh3, 2,6-iPr–C6H3; X and Y = CH2tBu, OtBu, OSi(OtBu)3) olefin metathesis catalysts: structural, spectroscopic and electronic properties. Dalton Trans 2006:3077-87. [PMID: 16786066 DOI: 10.1039/b604481f] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
DFT(B3PW91) calculations have been carried out to rationalise the structural, electronic and spectroscopic properties of Mo and W imido M(NR1)(CHR2)(X)(Y) olefin metathesis catalysts by using either simplified or actual ligands of the experimental complexes. The calculated structures, energetics (preference for the syn isomer and alkylidene rotational barrier for the syn/anti interconversion), and spectroscopic properties (NMR J(C-H) coupling constants) are in good agreement with available experimental data. Additionally, the alkylidene nu(C-H) stretching frequencies, not available experimentally, have been calculated. These quasi-tetrahedral complexes have a linear imido group and a C-H alkylidene agostic interaction, which stabilizes the syn isomer. Whether looking at M(NR1)(CHR2)(X)(Y), M = Mo, W, or the isolobal Re complexes, Re(CR1)(CHR2)(X)(Y), a linear correlation is obtained between both the alkylidene nu(C-H) stretching frequencies and J(C-H) coupling constants with the calculated alkylidene C-H bond lengths. These correlations show that the strength of the alpha-C-H agostic interaction increases from alkylidyne Re to imido group 6 complexes and from Mo to W. The NBO and AIM Bader analyses show firstly that the imido and alkylidyne groups are both triply bonded to the metal, but that the triply bonded imido ligand is a weaker electron donor than the alkylidyne, hence the stronger alpha-C-H agostic interaction for group 6 imido complexes. Secondly, one of the pi bonds of the triply bonded ligand is weakened at the transition state of the alkylidene rotation: while no lone pair is formed, the metal-ligand triple bond is polarized. This is more favourable for an imido than for an alkylidyne ligand, hence the lower alkylidene rotational barrier for the former complexes. Conversely, the aryl imido is even less of an electron donor than the alkyl imido group, which in turn strengthens the alpha-C-H agostic interaction and lowers the alkylidene rotational barrier even more.
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Affiliation(s)
- Albert Poater
- LSDSMS (UMR 5636 CNRS-UM2), Institut Gerhardt, Université Montpellier 2, F-34095, Montpellier Cedex 05, France
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Shimizu H, Kobayashi S. Convenient synthesis of α-amino amides using low-valent tantalum prepared from TaCl5 and Zn. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.08.131] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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20
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Oulié, P, Bréfuel N, Vendier L, Duhayon C, Etienne M. A New Way to Scorpionate Niobium Complexes: Terminal Alkyne, Imido, and Oxo Complexes and the Rearrangement of α-Agostic Ethyl Complexes. Organometallics 2005. [DOI: 10.1021/om050423f] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pascal Oulié,
- Laboratoire de Chimie de Coordination du CNRS, UPR 8241, 205 Route de Narbonne, 31077 Toulouse Cedex 04, France
| | - Nicolas Bréfuel
- Laboratoire de Chimie de Coordination du CNRS, UPR 8241, 205 Route de Narbonne, 31077 Toulouse Cedex 04, France
| | - Laure Vendier
- Laboratoire de Chimie de Coordination du CNRS, UPR 8241, 205 Route de Narbonne, 31077 Toulouse Cedex 04, France
| | - Carine Duhayon
- Laboratoire de Chimie de Coordination du CNRS, UPR 8241, 205 Route de Narbonne, 31077 Toulouse Cedex 04, France
| | - Michel Etienne
- Laboratoire de Chimie de Coordination du CNRS, UPR 8241, 205 Route de Narbonne, 31077 Toulouse Cedex 04, France
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21
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Solans-Monfort X, Clot E, Copéret C, Eisenstein O. Understanding Structural and Dynamic Properties of Well-Defined Rhenium-Based Olefin Metathesis Catalysts, Re(⋮CR)(CHR)(X)(Y), from DFT and QM/MM Calculations. Organometallics 2005. [DOI: 10.1021/om048997s] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xavier Solans-Monfort
- LSDSMS (UMR 5636 CNRS-UM2), cc14, Institut Gerhardt, Université Montpellier 2, F-34095 Montpellier Cedex 05, France, and LCOMS (UMR 9986 CNRS-CPELyon), 43, CPE Lyon, Bd du 11 Novembre 1918, F-69616 Villeurbanne Cedex, France
| | - Eric Clot
- LSDSMS (UMR 5636 CNRS-UM2), cc14, Institut Gerhardt, Université Montpellier 2, F-34095 Montpellier Cedex 05, France, and LCOMS (UMR 9986 CNRS-CPELyon), 43, CPE Lyon, Bd du 11 Novembre 1918, F-69616 Villeurbanne Cedex, France
| | - Christophe Copéret
- LSDSMS (UMR 5636 CNRS-UM2), cc14, Institut Gerhardt, Université Montpellier 2, F-34095 Montpellier Cedex 05, France, and LCOMS (UMR 9986 CNRS-CPELyon), 43, CPE Lyon, Bd du 11 Novembre 1918, F-69616 Villeurbanne Cedex, France
| | - Odile Eisenstein
- LSDSMS (UMR 5636 CNRS-UM2), cc14, Institut Gerhardt, Université Montpellier 2, F-34095 Montpellier Cedex 05, France, and LCOMS (UMR 9986 CNRS-CPELyon), 43, CPE Lyon, Bd du 11 Novembre 1918, F-69616 Villeurbanne Cedex, France
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22
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Galakhov MV, Gómez M, Gómez-Sal P, Velasco P. Alkylation and Insertion Reactions in Dichloro Azatantalacyclopropane Complexes. X-ray Crystal Structures of [TaCpCl2{C(Ph)CHCMe2NAr-κ2C,N}] (Cp = η5-C5Me5, η5-C5H4SiMe3; Ar = 2,6-Me2C6H3). Organometallics 2005. [DOI: 10.1021/om049110v] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mikhail V. Galakhov
- Departamento de Química Inorgánica, Universidad de Alcalá de Henares, Campus Universitario, E-28871 Alcalá de Henares, Spain, and Centro de Espectroscopia de RMN, Universidad de Alcalá de Henares, Campus Universitario, E-28871 Alcalá de Henares, Spain
| | - Manuel Gómez
- Departamento de Química Inorgánica, Universidad de Alcalá de Henares, Campus Universitario, E-28871 Alcalá de Henares, Spain, and Centro de Espectroscopia de RMN, Universidad de Alcalá de Henares, Campus Universitario, E-28871 Alcalá de Henares, Spain
| | - Pilar Gómez-Sal
- Departamento de Química Inorgánica, Universidad de Alcalá de Henares, Campus Universitario, E-28871 Alcalá de Henares, Spain, and Centro de Espectroscopia de RMN, Universidad de Alcalá de Henares, Campus Universitario, E-28871 Alcalá de Henares, Spain
| | - Patricia Velasco
- Departamento de Química Inorgánica, Universidad de Alcalá de Henares, Campus Universitario, E-28871 Alcalá de Henares, Spain, and Centro de Espectroscopia de RMN, Universidad de Alcalá de Henares, Campus Universitario, E-28871 Alcalá de Henares, Spain
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23
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Mashima K. Ligand Architecture on Stereocontrol of Half-Metallocene Benzylidene Complexes of Tantalum. Adv Synth Catal 2005. [DOI: 10.1002/adsc.200404272] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Cho HG, Andrews L. Persistent Photo-Reversible Transition-Metal Methylidene System Generated from Reaction of Methyl Fluoride with Laser-Ablated Zirconium Atoms and Isolated in a Solid Argon Matrix. J Am Chem Soc 2004; 126:10485-92. [PMID: 15315465 DOI: 10.1021/ja0486115] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A photoreversible transition-metal methylidene system has been formed for the first time by reaction of methyl fluoride and laser-ablated Zr atoms, isolated in solid argon, and investigated by means of infrared spectroscopy. Four different groups of absorptions are characterized on the basis of behaviors upon broad-band irradiation and sample annealing. Growth of Group I is accompanied by demise of Group II on irradiation with visible light (lambda > 530 nm) and vice versa with UV light (240 < lambda < 380 nm). The methylidene complex CH(2)=ZrHF is responsible for Groups I and II either in different singlet-triplet spin states or argon matrix packing configurations. The ground singlet state is stabilized by an agostic interaction. On the other hand, Group III, which arises from the Grignard type compound CH(3)-ZrF, disappears upon irradiation of UV light (lambda > 380 nm), increasing the concentration of CH(2)=ZrHF by alpha-H elimination. Fragments of methyl fluoride such as the CH(2)F radical comprise Group IV. Theoretical calculations are carried out for the alkylidene complex and other plausible products, and the results are compared with the experimental frequencies.
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Affiliation(s)
- Han-Gook Cho
- Contribution from the Department of Chemistry, P.O. Box 400319, University of Virginia, Charlottesville, VA 22904-4319, USA
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25
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Cho HG, Andrews L. Photoreversible Hydrogen Migration System in a Solid Argon Matrix Formed by the Reaction of Methyl Fluoride with Laser-Ablated Titanium Atoms. J Phys Chem A 2004. [DOI: 10.1021/jp0483775] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Han-Gook Cho
- Department of Chemistry, University of Virginia, P.O. Box 400319, Charlottesville, Virginia 22904-4319
| | - Lester Andrews
- Department of Chemistry, University of Virginia, P.O. Box 400319, Charlottesville, Virginia 22904-4319
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27
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Most K, Mösch-Zanetti NC, Vidović D, Magull J. Syntheses and Structures of Molybdenum(IV) Complexes with 3,5-Dimethyl- and 3,5-Di-tert-butylpyrazolato Ligands. Variable Coordination Modes and C−H Bond Activation. Organometallics 2003. [DOI: 10.1021/om034076q] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kerstin Most
- Institut für Anorganische Chemie der Georg-August-Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Nadia C. Mösch-Zanetti
- Institut für Anorganische Chemie der Georg-August-Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Denis Vidović
- Institut für Anorganische Chemie der Georg-August-Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Jörg Magull
- Institut für Anorganische Chemie der Georg-August-Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
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28
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Gómez M. (Alkyl)(monocyclopentadienyl)niobium and ‐tantalum Complexes in Insertion Processes. Eur J Inorg Chem 2003. [DOI: 10.1002/ejic.200300207] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Manuel Gómez
- Departamento de Química Inorgánica, Universidad de Alcalá de Henares, Campus Universitario, 28871 Alcalá de Henares, Spain Fax: (internat.) + 34‐91/885‐4683
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29
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Mashima K, Yonekura H, Yamagata T, Tani K. Synthesis, Characterization, and Reactions of a Half-Metallocene Benzylidene Complex of Tantalum Bearing 2,3-Dimethyl-1,3-butadiene and Pentamethylcyclopentadienyl Ligands. Organometallics 2003. [DOI: 10.1021/om030313d] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kazushi Mashima
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Hirotaka Yonekura
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Tsuneaki Yamagata
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Kazuhide Tani
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
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30
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Doufou P, Abboud KA, Boncella JM. Synthesis and reactivity of hydridotris(1-pyrazolyl)borate tungsten(VI) amido alkylidyne complexes. Inorganica Chim Acta 2003. [DOI: 10.1016/s0020-1693(02)01350-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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31
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Affiliation(s)
- Richard R Schrock
- Department of Chemistry 6-331, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA.
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32
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Bau R, Mason SA, Patrick BO, Adams CS, Sharp WB, Legzdins P. α-Agostic Interactions in Cp*W(NO)(CH2CMe3)2 and Related Nitrosyl Complexes. Organometallics 2001. [DOI: 10.1021/om0106231] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Robert Bau
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, Institut Laue-Langevin, Grenoble, France F-38042, and Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Sax A. Mason
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, Institut Laue-Langevin, Grenoble, France F-38042, and Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Brian O. Patrick
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, Institut Laue-Langevin, Grenoble, France F-38042, and Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Craig S. Adams
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, Institut Laue-Langevin, Grenoble, France F-38042, and Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - W. Brett Sharp
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, Institut Laue-Langevin, Grenoble, France F-38042, and Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Peter Legzdins
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, Institut Laue-Langevin, Grenoble, France F-38042, and Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
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33
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Bazinet P, Yap GPA, Richeson DS. Metallaaziridine Complexes of Tantalum Derived from 1,8-Bis(isopropylamino)naphthalene via β-H Activation. Organometallics 2001. [DOI: 10.1021/om0105167] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Patrick Bazinet
- Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
| | - Glenn P. A. Yap
- Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
| | - Darrin S. Richeson
- Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
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Pugh SM, Trösch DJM, Skinner MEG, Gade LH, Mountford P. Group 5 Imido Complexes Supported by Diamido−pyridine Ligands: Aryloxide, Amide, Benzamidinate, Alkyl, and Cyclopentadienyl Derivatives. Organometallics 2001. [DOI: 10.1021/om0103153] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stephen M. Pugh
- Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K., and Laboratoire de Chimie Organométallique et de Catalyse (CNRS UMR 7513), Institut Le Bel, Université Louis Pasteur, 4 Rue Blaise Pascal, 67000 Strasbourg, France
| | - Dominique J. M. Trösch
- Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K., and Laboratoire de Chimie Organométallique et de Catalyse (CNRS UMR 7513), Institut Le Bel, Université Louis Pasteur, 4 Rue Blaise Pascal, 67000 Strasbourg, France
| | - Michael E. G. Skinner
- Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K., and Laboratoire de Chimie Organométallique et de Catalyse (CNRS UMR 7513), Institut Le Bel, Université Louis Pasteur, 4 Rue Blaise Pascal, 67000 Strasbourg, France
| | - Lutz H. Gade
- Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K., and Laboratoire de Chimie Organométallique et de Catalyse (CNRS UMR 7513), Institut Le Bel, Université Louis Pasteur, 4 Rue Blaise Pascal, 67000 Strasbourg, France
| | - Philip Mountford
- Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K., and Laboratoire de Chimie Organométallique et de Catalyse (CNRS UMR 7513), Institut Le Bel, Université Louis Pasteur, 4 Rue Blaise Pascal, 67000 Strasbourg, France
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Castro A, Galakhov M, Gómez M, Gómez-Sal P, Martín A, Sánchez F, Velasco P. Insertion of Isocyanide into Metal−Carbon Bonds of Alkylchloro(pentamethylcyclopentadienyl)niobium- and -tantalum Complexes − X-ray Structure of [TaCp*Cl2(CH2CMe2Ph){η2-C(CH2CMe2Ph)=N(2,6-Me2C6H3)}] and Unexpected Decomposition of Alkyldichloro(η2-iminoacyl) Complexes of Tantalum. Eur J Inorg Chem 2000. [DOI: 10.1002/1099-0682(200009)2000:9<2047::aid-ejic2047>3.0.co;2-v] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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36
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Oshiki T, Mashima K, Kawamura SI, Tani K, Kitaura K. Substituent Effect on Organotin Tp*Compounds as the Tp*Reagent for the Preparation of Mono Tp*Complexes of Group 4—6 Metals (Tp*= Tris(3,5-dimethylpyrazol-1-yl)hydroborate). BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2000. [DOI: 10.1246/bcsj.73.1735] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Hierso JC, Etienne M. Alkyne[hydrotris(pyrazolyl)borato]tantalum Complexes – An Ethyl Group is a Better α-Agostic Donor Than a Methyl Group. Eur J Inorg Chem 2000. [DOI: 10.1002/(sici)1099-0682(200005)2000:5<839::aid-ejic839>3.0.co;2-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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38
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Takai K, Ishiyama T, Yasue H, Nobunaka T, Itoh M, Oshiki T, Mashima K, Tani K. Isolation and Reactions of a Tantalum−Imine Complex TaCl3(dme)(PhCHNCH2Ph). Organometallics 1998. [DOI: 10.1021/om980380l] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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39
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Mashima K, Oshiki T, Tani K. Tp*Sn(Cl)Bu2 as a Convenient Reagent for the Preparation of Hydrotris(3,5-dimethylpyrazolyl)borate Complexes of Niobium, Tantalum, and Zirconium. Organometallics 1997. [DOI: 10.1021/om9701175] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kazushi Mashima
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560, Japan
| | - Toshiyuki Oshiki
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560, Japan
| | - Kazuhide Tani
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560, Japan
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40
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Maruyama Y, Ikeda S, Ozawa F. Synthesis of Alkyl[hydrotris(pyrazolyl)borato]ruthenium(II) Complexes by Transmetallation. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1997. [DOI: 10.1246/bcsj.70.689] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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