1
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Lyubov DM, Zakaria H, Nelyubina YV, Aysin RR, Bukalov SS, Trifonov AA. Ca(II) and Yb(II) complexes featuring M(C≡C) 4 structural motif: enforced proximity or genuine η 2 -bonding? Chemistry 2024; 30:e202303533. [PMID: 38070175 DOI: 10.1002/chem.202303533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Indexed: 01/12/2024]
Abstract
Bis(carbazolide) complexes M[3,6-tBu2 -1,8-(RC≡C)2 Carb]2 (THF)n (R=SiMe3 , n=0, M=Ca, Yb; R=Ph, n=1, M=Ca, Yb; n=0, M=Yb) were synthesized through transamination reaction of M[N(SiMe3 )2 ]2 (THF)2 with two molar equivalents of carbazoles. The complexes feature M(η2 -C≡C)4 structural motif composed of M(II) ions encapsulated by four acetylene fragments due to atypical for alkaline- and rare-earth metals η2 -interactions with triple C≡C bond. This interaction is evidenced experimentally by X-ray diffraction, Raman spectroscopy in the solid state and by NMR-spectroscopy in the solution. According to QTAIM analysis there are 4 bond critical points (3;-1) between the metal atom and each of the triple bonds, which are connected by a strongly curved, almost T-shaped bond pathway.
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Affiliation(s)
- Dmitry M Lyubov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Russia, 49 Tropinina str., GSP-445, 603950, Nizhny Novgorod
| | - Hamza Zakaria
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Russia, 49 Tropinina str., GSP-445, 603950, Nizhny Novgorod
- N. I. Lobachevsky State University of Nizhny Novgorod, Gagarina Avenue 23, 603950, Nizhny Novgorod, Russia
| | - Yulia V Nelyubina
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Gagarina Avenue 23, 603950, Nizhny Novgorod, Russia
- 28 Vavilova str., 119334, Moscow, Russia
| | - Rinat R Aysin
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Gagarina Avenue 23, 603950, Nizhny Novgorod, Russia
- 28 Vavilova str., 119334, Moscow, Russia
| | - Sergey S Bukalov
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Gagarina Avenue 23, 603950, Nizhny Novgorod, Russia
- 28 Vavilova str., 119334, Moscow, Russia
| | - Alexander A Trifonov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Russia, 49 Tropinina str., GSP-445, 603950, Nizhny Novgorod
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Gagarina Avenue 23, 603950, Nizhny Novgorod, Russia
- 28 Vavilova str., 119334, Moscow, Russia
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2
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Nicholas KM, Lander C, Shao Y. Computational Evaluation of Potential Molecular Catalysts for Nitrous Oxide Decomposition. Inorg Chem 2022; 61:14591-14605. [PMID: 36067530 DOI: 10.1021/acs.inorgchem.2c01598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Nitrous oxide (N2O) is a potent greenhouse gas (GHG) with limited use as a mild anesthetic and underdeveloped reactivity. Nitrous oxide splitting (decomposition) is critical to its mitigation as a GHG. Although heterogeneous catalysts for N2O decomposition have been developed, highly efficient, long-lived solid catalysts are still needed, and the details of the catalytic pathways are not well understood. Reported herein is a computational evaluation of three potential molecular (homogeneous) catalysts for N2O splitting, which could aid in the development of more active and robust catalysts and provide deeper mechanistic insights: one Cu(I)-based, [(CF3O)4Al]Cu (A-1), and two Ru(III)-based, Cl(POR)Ru (B-1) and (NTA)Ru (C-1) (POR = porphyrin, NTA = nitrilotriacetate). The structures and energetic viability of potential intermediates and key transition states are evaluated according to a two-stage reaction pathway: (A) deoxygenation (DO), during which a metal-N2O complex undergoes N-O bond cleavage to produce N2 and a metal-oxo species and (B) (di)oxygen evolution (OER), in which the metal-oxo species dimerizes to a dimetal-peroxo complex, followed by conversion to a metal-dioxygen species from which dioxygen dissociates. For the (F-L)Cu(I) activator (A-1), deoxygenation of N2O is facilitated by an O-bound (F-L)Cu-O-N2 or better by a bimetallic N,O-bonded, (F-L)Cu-NNO-Cu(F-L) complex; the resulting copper-oxyl (F-L)Cu-O is converted exergonically to (F-L)Cu-(η2,η2-O2)-Cu(F-L), which leads to dioxygen species (F-L)Cu(η2-O2), that favorably dissociates O2. Key features of the DO/OER process for (POR)ClRu (B-1) include endergonic N2O coordination, facile N2 evolution from LR'u-N2O-RuL to Cl(POR)RuO, moderate barrier coupling of Cl(POR)RuO to peroxo Cl(POR)Ru(O2)Ru(POR)Cl, and eventual O2 dissociation from Cl(POR)Ru(η1-O2), which is nearly thermoneutral. N2O decomposition promoted by (NTA)Ru(III) (C-1) can proceed with exergonic N2O coordination, facile N2 dissociation from (NTA)Ru-ON2 or (NTA)Ru-N2O-Ru(NTA) to form (NTA)Ru-O; dimerization of the (NTA)Ru-oxo species is facile to produce (NTA)Ru-O-O-Ru(NTA), and subsequent OE from the peroxo species is moderately endergonic. Considering the overall energetics, (F-L)Cu and Cl(POR)Ru derivatives are deemed the best candidates for promoting facile N2O decomposition.
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Affiliation(s)
- Kenneth M Nicholas
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Chance Lander
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Yihan Shao
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, Norman, Oklahoma 73019, United States
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3
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Reactions of a Bis(pentalene)dititanium complex with alkenes; the molecular structure of the butadiene complex [Ti2(µ: η5,η5-Pn††)2(μ: η2,η2-s-trans-C4H6)] (Pn†† = 1,4-(Si Pr3)2-C8H4). Polyhedron 2022. [DOI: 10.1016/j.poly.2021.115574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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4
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Fortier S, Gomez-Torres A. Redox chemistry of discrete low-valent titanium complexes and low-valent titanium synthons. Chem Commun (Camb) 2021; 57:10292-10316. [PMID: 34533140 DOI: 10.1039/d1cc02772g] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Titanium is a versatile metal that has important applications in practical synthesis, though this is typically limited to stoichiometric reactions or Lewis acid catalysis. Recently, interest has grown in using titanium and other early-metals for redox catalysis; however, notable limitations exist due to the thermodynamic preference of these metals to adopt high oxidation states. Nonetheless, discrete low-valent titanium (LVT) complexes and their synthons (titanium complexes which chemically behave as LVT sources) are known. Here, we detail the various ligand platforms that are capable of stabilizing LVT compounds and present the redox chemistry of these systems. This includes a discussion of recent developments in the use of LVT synthons for accessing fully reversible oxidative-addition/reductive-elimination reactions.
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Affiliation(s)
- Skye Fortier
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, TX 79968, USA.
| | - Alejandra Gomez-Torres
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, TX 79968, USA.
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5
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Wang D, Ding W, Hou G, Zi G, Walter MD. Uranium versus Thorium: Synthesis and Reactivity of [η 5 -1,2,4-(Me 3 C) 3 C 5 H 2 ] 2 U[η 2 -C 2 Ph 2 ]. Chemistry 2021; 27:6767-6782. [PMID: 33559922 PMCID: PMC8251885 DOI: 10.1002/chem.202100089] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Indexed: 01/09/2023]
Abstract
The synthesis, electronic structure, and reactivity of a uranium metallacyclopropene were comprehensively studied. Addition of diphenylacetylene (PhC≡CPh) to the uranium phosphinidene metallocene [η5‐1,2,4‐(Me3C)3C5H2]2U=P‐2,4,6‐tBu3C6H2 (1) yields the stable uranium metallacyclopropene, [η5‐1,2,4‐(Me3C)3C5H2]2U[η2‐C2Ph2] (2). Based on density functional theory (DFT) results the 5f orbital contributions to the bonding within the metallacyclopropene U‐(η2‐C=C) moiety increases significantly compared to the related ThIV compound [η5‐1,2,4‐(Me3C)3C5H2]2Th[η2‐C2Ph2], which also results in more covalent bonds between the [η5‐1,2,4‐(Me3C)3C5H2]2U2+ and [η2‐C2Ph2]2− fragments. Although the thorium and uranium complexes are structurally closely related, different reaction patterns are therefore observed. For example, 2 reacts as a masked synthon for the low‐valent uranium(II) metallocene [η5‐1,2,4‐(Me3C)3C5H2]2UII when reacted with Ph2E2 (E=S, Se), alkynes and a variety of hetero‐unsaturated molecules such as imines, ketazine, bipy, nitriles, organic azides, and azo derivatives. In contrast, five‐membered metallaheterocycles are accessible when 2 is treated with isothiocyanate, aldehydes, and ketones.
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Affiliation(s)
- Deqiang Wang
- Department of Chemistry, Beijing Normal University, Beijing, 100875, China
| | - Wanjian Ding
- Department of Chemistry, Beijing Normal University, Beijing, 100875, China
| | - Guohua Hou
- Department of Chemistry, Beijing Normal University, Beijing, 100875, China
| | - Guofu Zi
- Department of Chemistry, Beijing Normal University, Beijing, 100875, China
| | - Marc D Walter
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106, Braunschweig, Germany
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6
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Gyepes R, Pinkas J, Kubišta J, Mach K, Horáček M. Sunlight-induced dehydrogenation rearrangement of the dititanium complex [Ti(η5-C5HMe4)(μ-η1: η5-C5Me4)]2. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2020.121663] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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7
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Horno ED, Jiménez-Aparicio R, Mena M, Pérez-Redondo A, Priego JL, Yélamos C. Preparation of Dimeric Monopentamethylcyclopentadienyltitanium(III) Dihalides and Related Derivatives. Inorg Chem 2020; 59:3740-3752. [PMID: 32101433 DOI: 10.1021/acs.inorgchem.9b03399] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis, crystal structure, and reactivity of a series of half-sandwich titanium(III) dihalide complexes [Ti(η5-C5Me5)X2] (X = Cl, Br, I) and several of its Lewis base derivatives were investigated. The reaction of the trihalides [Ti(η5-C5Me5)X3] (X = Cl (1), Br (2), I (3)) with LiAlH4 (≥1 equiv) in toluene at room temperature results in the formation of the halide-bridged dimers [{Ti(η5-C5Me5)X(μ-X)}2] (X = Cl (4), Br (5), I (6)). The treatment of 4 with [Li{N(SiMe3)2}] (≥2 equiv) at room temperature affords the precipitation of the amido titanium(III) complex [{Ti(η5-C5Me5)(μ-Cl){N(SiMe3)2}}2] (7), but analogous reactions of 4 with other lithium reagents [LiR] (R = Me, CH2SiMe3, NMe2) lead to disproportionation into titanium(IV) [Ti(η5-C5Me5)R3] and presumably titanium(II) derivatives. Similarly, complex 4 in solution at temperatures higher than 100 °C undergoes disproportionation as demonstrated by its reactions with cobaltocene and N-(4-methylbenzylidene)aniline yielding the ionic paramagnetic compound [Co(η5-C5H5)2][Ti(η5-C5Me5)Cl3] (8) and the diamagnetic diazatitanacyclopentane [Ti(η5-C5Me5)Cl{N(Ph)CH(p-tolyl)}2], respectively. Treatment of complex 4 with 2 equiv of 2,6-dimethylphenylisocyanide or tert-butylisocyanide in toluene at room temperature affords the paramagnetic titanium(III) dinuclear adducts [{Ti(η5-C5Me5)Cl(μ-Cl)(CNR)}2] (R = 2,6-Me2C6H3 (9), tBu (10)). Magnetic studies for polycrystalline 9 show that it displays a weak intramolecular antiferromagnetic coupling between the Ti ions, which is consistent with the long Ti-Ti distance of 3.857(1) Å determined by X-ray diffraction. The isocyanide ligands in complex 10 undergo a reductive coupling reaction in toluene to give the titanium(IV) iminoacyl derivative [{Ti(η5-C5Me5)Cl2}2(μ-η2:η2-tBuN═C-C═NtBu)] (11). Whereas an analogous dinuclear structure was found in the aqua titanium(III) complex [{Ti(η5-C5Me5)Cl(μ-Cl)(OH2)}2] (12), resulting from the reaction of 4 with adventitious amounts of water, compound 4 reacts with excess ammonia to give a mononuclear adduct [Ti(η5-C5Me5)Cl2(NH3)2] (13) with a robust layered pattern in the solid state.
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Affiliation(s)
| | - Reyes Jiménez-Aparicio
- Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
| | | | | | - José Luis Priego
- Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
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8
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Pinkas J, Kubišta J, Gyepes R, Mach K, Horáček M. Molecular Hydrogen‐Induced Carbon Chain Rearrangement in Cyclopentadienyl‐Tethered Titanium(III) Permethyltitanocene Complexes. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201901148] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry Czech Academy of Sciences Dolejškova 3 182 23 Prague 8 Czech Republic
| | - Jiří Kubišta
- J. Heyrovský Institute of Physical Chemistry Czech Academy of Sciences Dolejškova 3 182 23 Prague 8 Czech Republic
| | - Róbert Gyepes
- J. Heyrovský Institute of Physical Chemistry Czech Academy of Sciences Dolejškova 3 182 23 Prague 8 Czech Republic
- Department of Inorganic Chemistry Charles University Hlavova 2030 128 40 Prague 2 Czech Republic
| | - Karel Mach
- J. Heyrovský Institute of Physical Chemistry Czech Academy of Sciences Dolejškova 3 182 23 Prague 8 Czech Republic
| | - Michal Horáček
- J. Heyrovský Institute of Physical Chemistry Czech Academy of Sciences Dolejškova 3 182 23 Prague 8 Czech Republic
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9
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LaPierre EA, Patrick BO, Manners I. Trivalent Titanocene Alkyls and Hydrides as Well-Defined, Highly Active, and Broad Scope Precatalysts for Dehydropolymerization of Amine-Boranes. J Am Chem Soc 2019; 141:20009-20015. [DOI: 10.1021/jacs.9b11112] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Etienne A. LaPierre
- Department of Chemistry, University of Victoria, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada
| | - Brian O. Patrick
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Ian Manners
- Department of Chemistry, University of Victoria, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada
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10
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García-Castro M, García-Iriepa C, Del Horno E, Martín A, Mena M, Pérez-Redondo A, Temprado M, Yélamos C. The Puzzling Monopentamethylcyclopentadienyltitanium(III) Dichloride Reagent: Structure and Properties. Inorg Chem 2019; 58:5314-5324. [PMID: 30943022 DOI: 10.1021/acs.inorgchem.9b00437] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Following the track of the useful titanocene [Ti(η5-C5H5)2Cl] reagent in organic synthesis, the related half-sandwich titanium(III) derivatives [Ti(η5-C5R5)Cl2] are receiving increasing attention in radical chemistry of many catalyzed transformations. However, the structure of the active titanium(III) species remains unknown in the literature. Herein, we describe the synthesis, crystal structure, and electronic structure of titanium(III) aggregates of composition [{Ti(η5-C5Me5)Cl2} n]. The thermolysis of [Ti(η5-C5Me5)Cl2Me] (1) in benzene or hexane at 180 °C results in the clean formation of [{Ti(η5-C5Me5)Cl(μ-Cl)}2] (2), methane, and ethene. The treatment of 1 with excess pinacolborane in hexane at 65 °C leads to a mixture of 2 and the paramagnetic trimer [{Ti(η5-C5Me5)(μ-Cl)2}3] (3). The X-ray crystal structures of compounds 2 and 3 show Ti-Ti distances of 3.267(1) and 3.219(12) Å, respectively. Computational studies (CASPT2//CASSCF and BS DFT methods) for dimer 2 reveal a singlet ground state and a relatively large singlet-triplet energy gap. Nuclear magnetic resonance spectroscopy of 2 in aromatic hydrocarbon solutions and DFT calculations for several [{Ti(η5-C5Me5)Cl2} n] aggregates are consistent with the existence of an equilibrium between the diamagnetic dimer [{Ti(η5-C5Me5)Cl(μ-Cl)}2] and a paramagnetic tetramer [{Ti(η5-C5Me5)(μ-Cl)2}4] in solution. In contrast, complex 2 readily dissolves in tetrahydrofuran to give a green-blue solution from which blue crystals of the mononuclear adduct [Ti(η5-C5Me5)Cl2(thf)] (4) were grown.
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Affiliation(s)
- María García-Castro
- Departamento de Química Orgánica y Química Inorgánica , Universidad de Alcalá , 28805 Alcalá de Henares- Madrid , Spain
| | - Cristina García-Iriepa
- Departamento de Química Analítica, Química Física e Ingeniería Química , Universidad de Alcalá , 28805 Alcalá de Henares- Madrid , Spain.,Departamento de Química , Universidad de La Rioja, Centro de Investigación en Síntesis Química (CISQ) , 26006 Logroño , Spain
| | - Estefanía Del Horno
- Departamento de Química Orgánica y Química Inorgánica , Universidad de Alcalá , 28805 Alcalá de Henares- Madrid , Spain
| | - Avelino Martín
- Departamento de Química Orgánica y Química Inorgánica , Universidad de Alcalá , 28805 Alcalá de Henares- Madrid , Spain.,Instituto de Investigación Química "Andrés M. del Río" (IQAR) , Universidad de Alcalá , 28805 Alcalá de Henares- Madrid , Spain
| | - Miguel Mena
- Departamento de Química Orgánica y Química Inorgánica , Universidad de Alcalá , 28805 Alcalá de Henares- Madrid , Spain.,Instituto de Investigación Química "Andrés M. del Río" (IQAR) , Universidad de Alcalá , 28805 Alcalá de Henares- Madrid , Spain
| | - Adrián Pérez-Redondo
- Departamento de Química Orgánica y Química Inorgánica , Universidad de Alcalá , 28805 Alcalá de Henares- Madrid , Spain.,Instituto de Investigación Química "Andrés M. del Río" (IQAR) , Universidad de Alcalá , 28805 Alcalá de Henares- Madrid , Spain
| | - Manuel Temprado
- Departamento de Química Analítica, Química Física e Ingeniería Química , Universidad de Alcalá , 28805 Alcalá de Henares- Madrid , Spain.,Instituto de Investigación Química "Andrés M. del Río" (IQAR) , Universidad de Alcalá , 28805 Alcalá de Henares- Madrid , Spain
| | - Carlos Yélamos
- Departamento de Química Orgánica y Química Inorgánica , Universidad de Alcalá , 28805 Alcalá de Henares- Madrid , Spain.,Instituto de Investigación Química "Andrés M. del Río" (IQAR) , Universidad de Alcalá , 28805 Alcalá de Henares- Madrid , Spain
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11
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Allouche F, Klose D, Gordon CP, Ashuiev A, Wörle M, Kalendra V, Mougel V, Copéret C, Jeschke G. Low-Coordinated Titanium(III) Alkyl-Molecular and Surface-Complexes: Detailed Structure from Advanced EPR Spectroscopy. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806497] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Florian Allouche
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir Prelog Weg 1-5 8093 Zürich Switzerland
| | - Daniel Klose
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir Prelog Weg 1-5 8093 Zürich Switzerland
| | - Christopher P. Gordon
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir Prelog Weg 1-5 8093 Zürich Switzerland
| | - Anton Ashuiev
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir Prelog Weg 1-5 8093 Zürich Switzerland
| | - Michael Wörle
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir Prelog Weg 1-5 8093 Zürich Switzerland
| | - Vidmantas Kalendra
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir Prelog Weg 1-5 8093 Zürich Switzerland
- Faculty of Physics; Vilnius University; Sauletekio 3 10257 Vilnius Lithuania
- Current address: Department of Chemistry and Chemical Biology and The Baruch “60 Center for Biochemical Solar Energy; Rensselaer Polytechnic Institute; Troy NY 12180 USA
| | - Victor Mougel
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir Prelog Weg 1-5 8093 Zürich Switzerland
- Current address: Laboratoire de Chimie des Processus Biologiques, CNRS UMR 8229; Collège de France; Université Pierre et Marie Curie; 11 Place Marcelin Berthelot 75231 Paris Cedex 05 France
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir Prelog Weg 1-5 8093 Zürich Switzerland
| | - Gunnar Jeschke
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir Prelog Weg 1-5 8093 Zürich Switzerland
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12
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Allouche F, Klose D, Gordon CP, Ashuiev A, Wörle M, Kalendra V, Mougel V, Copéret C, Jeschke G. Low-Coordinated Titanium(III) Alkyl-Molecular and Surface-Complexes: Detailed Structure from Advanced EPR Spectroscopy. Angew Chem Int Ed Engl 2018; 57:14533-14537. [DOI: 10.1002/anie.201806497] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Florian Allouche
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir Prelog Weg 1-5 8093 Zürich Switzerland
| | - Daniel Klose
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir Prelog Weg 1-5 8093 Zürich Switzerland
| | - Christopher P. Gordon
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir Prelog Weg 1-5 8093 Zürich Switzerland
| | - Anton Ashuiev
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir Prelog Weg 1-5 8093 Zürich Switzerland
| | - Michael Wörle
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir Prelog Weg 1-5 8093 Zürich Switzerland
| | - Vidmantas Kalendra
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir Prelog Weg 1-5 8093 Zürich Switzerland
- Faculty of Physics; Vilnius University; Sauletekio 3 10257 Vilnius Lithuania
- Current address: Department of Chemistry and Chemical Biology and The Baruch “60 Center for Biochemical Solar Energy; Rensselaer Polytechnic Institute; Troy NY 12180 USA
| | - Victor Mougel
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir Prelog Weg 1-5 8093 Zürich Switzerland
- Current address: Laboratoire de Chimie des Processus Biologiques, CNRS UMR 8229; Collège de France; Université Pierre et Marie Curie; 11 Place Marcelin Berthelot 75231 Paris Cedex 05 France
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir Prelog Weg 1-5 8093 Zürich Switzerland
| | - Gunnar Jeschke
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir Prelog Weg 1-5 8093 Zürich Switzerland
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13
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Pinkas J, Gyepes R, Císařová I, Kubišta J, Horáček M, Žilková N, Mach K. Hydrogenation of titanocene and zirconocene bis(trimethylsilyl)acetylene complexes. Dalton Trans 2018; 47:8921-8932. [PMID: 29916518 DOI: 10.1039/c8dt01909f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reactions following the addition of dihydrogen under maximum atmospheric pressure to bis(trimethylsilyl)acetylene (BTMSA) complexes of titanocenes, [(η5-C5H5-nMen)2Ti(η2-BTMSA)] (n = 0, 1, 3, and 4) (1A-1D), and zirconocenes, [(η5-C5H5-nMen)2Zr(η2-BTMSA)] (n = 2-5) (4A-4D), proceeded in diverse ways and, depending on the metal, afforded different products. The former complexes lost, in all cases, their BTMSA ligand via its hydrogenation to bis-1,2-(trimethylsilyl)ethane when reacted at 80 °C for a prolonged reaction time. For n = 0, 1, and 3, the titanocene species formed in situ dimerised via the formation of fulvalene ligands and two bridging hydride ligands, giving known green dimeric titanocenes (2A-2C). For n = 4, a titanocene hydride [(η5-C5HMe4)2TiH] (2D) was formed, similarly to the known [(η5-C5Me5)2TiH] (2E) for n = 5; however, in contrast to this example, 2D in the absence of dihydrogen spontaneously dehydrogenated to the known Ti(iii)-Ti(iii) dehydro-dimer [{Ti(η5-C5HMe4)(μ-η1:η5-C5Me4)}2] (3B). This complex has now been fully characterised via spectroscopic methods, and was shown through EPR spectroscopy to attain an intramolecular electronic triplet state. The zirconocene-BTMSA complexes 4A-4D reacted uniformly with one hydrogen molecule to give Zr(iv) zirconocene hydride alkenyls, [(η5-C5H5-nMen)2ZrH{C(SiMe3)[double bond, length as m-dash]CH(SiMe3)}] (n = 2-5) (5A-5D). These were identified through their 1H and 13C NMR spectra, which show features typical of an agostically bonded proton, [double bond, length as m-dash]CH(SiMe3). Compounds 5A-5D formed equilibria with the BTMSA complexes 4A-4D depending on hydrogen pressure and temperature.
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Affiliation(s)
- Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry, Czech Academy of Sciences, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic.
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Tsoureas N, Green JC, Cloke FGN. Bis(pentalene)dititanium chemistry: C–H, C–X and H–H bond activation. Dalton Trans 2018; 47:14531-14539. [DOI: 10.1039/c8dt02654h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Formation of an agostic hydrogen by protonation of a “tucked-in” bis(pentalene)ditanium complex.
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Affiliation(s)
- Nikolaos Tsoureas
- School of Life Sciences
- Department of Chemistry
- University of Sussex
- Brighton
- UK
| | - Jennifer C. Green
- Department of Chemistry
- University of Oxford
- Inorganic Chemistry Laboratory
- Oxford OX1 3QR
- UK
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Pinkas J, Gyepes R, Císařová I, Kubišta J, Horáček M, Mach K. Decamethyltitanocene hydride intermediates in the hydrogenation of the corresponding titanocene-(η 2-ethene) or (η 2-alkyne) complexes and the effects of bulkier auxiliary ligands. Dalton Trans 2017; 46:8229-8244. [PMID: 28617500 DOI: 10.1039/c7dt01545c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
1H NMR studies of reactions of titanocene [Cp*2Ti] (Cp* = η5-C5Me5) and its derivatives [Cp*(η5:η1-C5Me4CH2)TiMe] and [Cp*2Ti(η2-CH2[double bond, length as m-dash]CH2)] with excess dihydrogen at room temperature and pressures lower than 1 bar revealed the formation of dihydride [Cp*2TiH2] (1) and the concurrent liberation of either methane or ethane, depending on the organometallic reactant. The subsequent slow decay of 1 yielding [Cp*2TiH] (2) was mediated by titanocene formed in situ and controlled by hydrogen pressure. The crystalline products obtained by evaporating a hexane solution of fresh [Cp*2Ti] in the presence of hydrogen contained crystals having either two independent molecules of 1 in the asymmetric part of the unit cell or cocrystals consisting of 1 and [Cp*2Ti] in a 2 : 1 ratio. Hydrogenation of alkyne complexes [Cp*2Ti(η2-R1C[triple bond, length as m-dash]CR2)] (R1 = R2 = Me or Et) performed at room temperature afforded alkanes R1CH2CH2R2, and after removing hydrogen, 2 was formed in quantitative yields. For alkyne complexes containing bulkier substituent(s) R1 = Me or Ph, R2 = SiMe3, and R1 = R2 = Ph or SiMe3, successful hydrogenation required the application of increased temperatures (70-80 °C) and prolonged reaction times, in particular for bis(trimethylsilyl)acetylene. Under these conditions, no transient 1 was detected during the formation of 2. The bulkier auxiliary ligands η5-C5Me4tBu and η5-C5Me4SiMe3 did not hinder the addition of dihydrogen to the corresponding titanocenes [(η5-C5Me4tBu)2Ti] and [(η5-C5Me4SiMe3)2Ti] yielding [(η5-C5Me4tBu)2TiH2] (3) and [(η5-C5Me4SiMe3)2TiH2] (4), respectively. In contrast to 1, the dihydride 4 did not decay with the formation of titanocene monohydride, but dissociated to titanocene upon dihydrogen removal. The monohydrides [(η5-C5Me4tBu)2TiH] (5) and [(η5-C5Me4SiMe3)2TiH] (6) were obtained by insertion of dihydrogen into the intramolecular titanium-methylene σ-bond in compounds [(η5-C5Me4tBu)(η5:η1-C5Me4CMe2CH2)Ti] and [(η5-C5Me4SiMe3)(η5:η1-C5Me4SiMe2CH2)Ti], respectively. The steric influence of the auxiliary ligands became clear from the nature of the products obtained by reacting 5 and 6 with butadiene. They appeared to be the exclusively σ-bonded η1-but-2-enyl titanocenes (7) and (8), instead of the common π-bonded derivatives formed for the sterically less congested titanocenes, including [Cp*2Ti(η3-(1-methylallyl))] (9). The molecular structure optimized by DFT for compound 1 acquired a distinctly lower total energy than the analogously optimized complex with a coordinated dihydrogen [Cp*2Ti(η2-H2)]. The stabilization energies of binding the hydride ligands to the bent titanocenes were estimated from counterpoise computations; they showed a decrease in the order 1 (-132.70 kJ mol-1), 3 (-121.11 kJ mol-1), and 4 (-112.35 kJ mol-1), in accordance with the more facile dihydrogen dissociation.
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Affiliation(s)
- Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry, Czech Academy of Sciences, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic.
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Adler C, Diekmann M, Schmidtmann M, Beckhaus R. Activation of Molecular Hydrogen by Bis(η5
,η1
-pentafulvene)-titanium Complexes - Efficient Formation of Titanium(III)hydrides. Z Anorg Allg Chem 2017. [DOI: 10.1002/zaac.201700095] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Christian Adler
- Institut für Chemie; Fakultät für Mathematik und Naturwissenschaften; Carl von Ossietzky Universität Oldenburg; Postfach 2503 26111 Oldenburg Germany
| | - Mira Diekmann
- Institut für Chemie; Fakultät für Mathematik und Naturwissenschaften; Carl von Ossietzky Universität Oldenburg; Postfach 2503 26111 Oldenburg Germany
| | - Marc Schmidtmann
- Institut für Chemie; Fakultät für Mathematik und Naturwissenschaften; Carl von Ossietzky Universität Oldenburg; Postfach 2503 26111 Oldenburg Germany
| | - Rüdiger Beckhaus
- Institut für Chemie; Fakultät für Mathematik und Naturwissenschaften; Carl von Ossietzky Universität Oldenburg; Postfach 2503 26111 Oldenburg Germany
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Tsoureas N, Green JC, Cloke FGN. C–H and H–H activation at a di-titanium centre. Chem Commun (Camb) 2017; 53:13117-13120. [DOI: 10.1039/c7cc07726b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An NHC promotes intramolecular C–H activation in bis(pentalene)dititanium; this process is reversed by the addition of hydrogen, forming a dihydride.
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Affiliation(s)
- Nikolaos Tsoureas
- Department of Chemistry, School of Life Sciences
- University of Sussex
- Brighton BN1 9QJ
- UK
| | - Jennifer C. Green
- Department of Chemistry
- University of Oxford
- Inorganic Chemistry Laboratory
- Oxford OX1 3QR
- UK
| | - F. Geoffrey N. Cloke
- Department of Chemistry, School of Life Sciences
- University of Sussex
- Brighton BN1 9QJ
- UK
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18
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Ehm C, Krüger J, Lentz D. How a Thermally Unstable Metal Hydrido Complex Can Yield High Catalytic Activity Even at Elevated Temperatures. Chemistry 2016; 22:9305-10. [DOI: 10.1002/chem.201601641] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Christian Ehm
- Dipartimento di Scienze Chimiche; Università di Napoli Federico II; Via Cintia 80126 Napoli Italy
| | - Juliane Krüger
- Institut für Chemie und Biochemie, Anorganische Chemie; Freie Universität Berlin; Fabeckstr. 34-36 14195 Berlin Germany
| | - Dieter Lentz
- Institut für Chemie und Biochemie, Anorganische Chemie; Freie Universität Berlin; Fabeckstr. 34-36 14195 Berlin Germany
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19
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Zhang L, Hou G, Zi G, Ding W, Walter MD. Influence of the 5f Orbitals on the Bonding and Reactivity in Organoactinides: Experimental and Computational Studies on a Uranium Metallacyclopropene. J Am Chem Soc 2016; 138:5130-42. [PMID: 27070508 DOI: 10.1021/jacs.6b01391] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The synthesis, structure, and reactivity of a uranium metallacyclopropene were comprehensively studied. Reduction of (η(5)-C5Me5)2UCl2 (1) with potassium graphite (KC8) in the presence of bis(trimethylsilyl)acetylene (Me3SiC≡CSiMe3) allows the first stable uranium metallacyclopropene (η(5)-C5Me5)2U[η(2)-C2(SiMe3)2] (2) to be isolated. Magnetic susceptibility data confirm that 2 is a U(IV) complex, and density functional theory (DFT) studies indicate substantial 5f orbital contributions to the bonding of the metallacyclopropene U-(η(2)-C═C) moiety, leading to more covalent bonds between the (η(5)-C5Me5)2U(2+) and [η(2)-C2(SiMe3)2](2-) fragments than those in the related Th(IV) compound. Consequently, very different reactivity patterns emerge, e.g., 2 can act as a source for the (η(5)-C5Me5)2U(II) fragment when reacted with alkynes and a variety of heterounsaturated molecules such as imines, bipy, carbodiimide, organic azides, hydrazine, and azo derivatives.
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Affiliation(s)
- Lei Zhang
- Department of Chemistry, Beijing Normal University , Beijing 100875, China
| | - Guohua Hou
- Department of Chemistry, Beijing Normal University , Beijing 100875, China
| | - Guofu Zi
- Department of Chemistry, Beijing Normal University , Beijing 100875, China
| | - Wanjian Ding
- Department of Chemistry, Beijing Normal University , Beijing 100875, China
| | - Marc D Walter
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig , Hagenring 30, 38106 Braunschweig, Germany
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20
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Zhang L, Fang B, Hou G, Ai L, Ding W, Walter MD, Zi G. Intrinsic reactivity of a uranium metallacyclopropene toward unsaturated organic molecules. Dalton Trans 2016; 45:16441-16452. [DOI: 10.1039/c6dt03005j] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A uranium metallacyclopropene shows a rich chemistry in the activation of small molecules by two electron transfer processes.
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Affiliation(s)
- Lei Zhang
- Department of Chemistry
- Beijing Normal University
- Beijing 100875
- China
| | - Bo Fang
- Department of Chemistry
- Beijing Normal University
- Beijing 100875
- China
| | - Guohua Hou
- Department of Chemistry
- Beijing Normal University
- Beijing 100875
- China
| | - Lin Ai
- Department of Chemistry
- Beijing Normal University
- Beijing 100875
- China
| | - Wanjian Ding
- Department of Chemistry
- Beijing Normal University
- Beijing 100875
- China
| | - Marc D. Walter
- Institut für Anorganische und Analytische Chemie
- Technische Universität Braunschweig
- 38106 Braunschweig
- Germany
| | - Guofu Zi
- Department of Chemistry
- Beijing Normal University
- Beijing 100875
- China
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21
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Wijeratne GB, Zolnhofer EM, Fortier S, Grant LN, Carroll PJ, Chen CH, Meyer K, Krzystek J, Ozarowski A, Jackson TA, Mindiola DJ, Telser J. Electronic Structure and Reactivity of a Well-Defined Mononuclear Complex of Ti(II). Inorg Chem 2015; 54:10380-97. [DOI: 10.1021/acs.inorgchem.5b01796] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gayan B. Wijeratne
- Department of Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
| | - Eva M. Zolnhofer
- Inorganic Chemistry, Department of Chemistry
and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Skye Fortier
- Department of Chemistry and Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, United States
| | - Lauren N. Grant
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Patrick J. Carroll
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Chun-Hsing Chen
- Department of Chemistry and Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, United States
| | - Karsten Meyer
- Inorganic Chemistry, Department of Chemistry
and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - J. Krzystek
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, United States
| | - Andrew Ozarowski
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, United States
| | - Timothy A. Jackson
- Department of Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
| | - Daniel J. Mindiola
- Department of Chemistry and Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, United States
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Joshua Telser
- Department of
Biological, Chemical and Physical Sciences, Roosevelt University, Chicago, Illinois 60605, United States
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22
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Fang B, Zhang L, Hou G, Zi G, Fang DC, Walter MD. C-H bond activation induced by thorium metallacyclopropene complexes: a combined experimental and computational study. Chem Sci 2015; 6:4897-4906. [PMID: 29142721 PMCID: PMC5664364 DOI: 10.1039/c5sc01684c] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 06/10/2015] [Indexed: 01/13/2023] Open
Abstract
Thorium metallacyclopropenes derived from phenyl(alkyl)acetylenes are very reactive complexes that undergo selective intramolecular C–H bond activation.
Inter- and intramolecular C–H bond activations by thorium metallacyclopropene complexes were comprehensively studied. The reduction of [η5-1,2,4-(Me3C)3C5H2]2ThCl2 (1) with potassium graphite (KC8) in the presence of internal alkynes (PhC
Created by potrace 1.16, written by Peter Selinger 2001-2019
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CR) yields the corresponding thorium metallacyclopropenes [η5-1,2,4-(Me3C)3C5H2]2Th(η2-C2Ph(R)) (R = Ph (2), Me (3), iPr (4), C6H11 (5)). Complexes 3–5 derived from phenyl(alkyl)acetylenes are very reactive resulting in an intramolecular C–H bond activation of the 1,2,4-(Me3C)3C5H2 ligand. In contrast, no intramolecular C–H bond activation is observed for the diphenylacetylene derived complex 2, but it does activate α-C–H bonds in pyridine or carbonyl derivatives upon coordination. Density functional theory (DFT) studies complement the experimental studies and provide additional insights into the observed reactivity.
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Affiliation(s)
- Bo Fang
- Department of Chemistry , Beijing Normal University , Beijing 100875 , China . ; ; ; Tel: +86-10-58806051
| | - Lei Zhang
- Department of Chemistry , Beijing Normal University , Beijing 100875 , China . ; ; ; Tel: +86-10-58806051
| | - Guohua Hou
- Department of Chemistry , Beijing Normal University , Beijing 100875 , China . ; ; ; Tel: +86-10-58806051
| | - Guofu Zi
- Department of Chemistry , Beijing Normal University , Beijing 100875 , China . ; ; ; Tel: +86-10-58806051
| | - De-Cai Fang
- Department of Chemistry , Beijing Normal University , Beijing 100875 , China . ; ; ; Tel: +86-10-58806051
| | - Marc D Walter
- Institut für Anorganische und Analytische Chemie , Technische Universität Braunschweig , Hagenring 30 , 38106 Braunschweig , Germany . ; ; Tel: +49-531-3915312
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Bousrez G, Déchamps I, Vasse JL, Jaroschik F. Reduction of titanocene dichloride with dysprosium: access to a stable titanocene(ii) equivalent for phosphite-free Takeda carbonyl olefination. Dalton Trans 2015; 44:9359-62. [PMID: 25919652 DOI: 10.1039/c4dt03979c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The reduction of titanocene dichloride with dysprosium yields a new titanocene(ii) equivalent without the need for further stabilising ligands. This reagent can be employed in combination with dithioacetals for the olefination of different carbonyl groups and allows for a simplified all-in-one procedure.
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Affiliation(s)
- G Bousrez
- Institut de Chimie Moléculaire, CNRS (UMR 7312) and Université de Reims, 51687 Reims Cedex 2, France.
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Abstract
Nitrous oxide (N2O, ‘laughing gas’) is a very inert molecule. Still, it can be used as a reagent in synthetic organic and inorganic chemistry, serving as O-atom donor, as N-atom donor, or as a oxidant in metal-catalyzed reactions.
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Affiliation(s)
- Kay Severin
- Institut des Sciences et Ingénierie Chimiques
- Ecole Polytechnique Fédérale de Lausanne (EPFL)
- 1015 Lausanne
- Switzerland
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25
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Fang B, Ren W, Hou G, Zi G, Fang DC, Maron L, Walter MD. An Actinide Metallacyclopropene Complex: Synthesis, Structure, Reactivity, and Computational Studies. J Am Chem Soc 2014; 136:17249-61. [DOI: 10.1021/ja509770t] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Bo Fang
- Department
of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Wenshan Ren
- Department
of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Guohua Hou
- Department
of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Guofu Zi
- Department
of Chemistry, Beijing Normal University, Beijing 100875, China
| | - De-Cai Fang
- Department
of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Laurent Maron
- LPCNO,
CNRS and INSA, Université Paul Sabatier, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Marc D. Walter
- Institut
für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
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Pinkas J, Císařová I, Gyepes R, Kubišta J, Horáček M, Mach K. Synthesis and Structure of Titanium(III) Bis(decamethyltitanocene) Oxide. Organometallics 2013. [DOI: 10.1021/om400624y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Jiří Pinkas
- J. Heyrovský Institute
of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic,
| | - Ivana Císařová
- Department of Inorganic Chemistry, Charles University, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Róbert Gyepes
- J. Heyrovský Institute
of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic,
- Faculty of Education, J. Selye University, Bratislavská cesta 3322, 945
01 Komárno, Slovak Republic
| | - Jiří Kubišta
- J. Heyrovský Institute
of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic,
| | - Michal Horáček
- J. Heyrovský Institute
of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic,
| | - Karel Mach
- J. Heyrovský Institute
of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic,
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Crestani MG, Hickey AK, Gao X, Pinter B, Cavaliere VN, Ito JI, Chen CH, Mindiola DJ. Room Temperature Dehydrogenation of Ethane, Propane, Linear Alkanes C4–C8, and Some Cyclic Alkanes by Titanium–Carbon Multiple Bonds. J Am Chem Soc 2013; 135:14754-67. [DOI: 10.1021/ja4060178] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marco G. Crestani
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Anne K. Hickey
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Xinfeng Gao
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Balazs Pinter
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Vincent N. Cavaliere
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Jun-Ichi Ito
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Chun-Hsing Chen
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Daniel J. Mindiola
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
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29
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Munhá RF, Zarkesh RA, Heyduk AF. Group transfer reactions of d0 transition metal complexes: redox-active ligands provide a mechanism for expanded reactivity. Dalton Trans 2013; 42:3751-66. [DOI: 10.1039/c2dt32063k] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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30
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Kilpatrick AFR, Green JC, Cloke FGN, Tsoureas N. Bis(pentalene)di-titanium: a bent double-sandwich complex with a very short Ti–Ti bond. Chem Commun (Camb) 2013; 49:9434-6. [PMID: 24005653 DOI: 10.1039/c3cc45187a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Pinkas J, Císařová I, Gyepes R, Kubišta J, Horáček M, Mach K. Ethene Complexes of Bulky Titanocenes, Their Thermolysis, and Their Reactivity toward 2-Butyne. Organometallics 2012. [DOI: 10.1021/om300461k] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3,
182 23 Prague 8, Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry, Charles University, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Róbert Gyepes
- Faculty of Education, J. Selye University, Bratislavská cesta 3322, 945 01 Komárno,
Slovak Republic
| | - Jiří Kubišta
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3,
182 23 Prague 8, Czech Republic
| | - Michal Horáček
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3,
182 23 Prague 8, Czech Republic
| | - Karel Mach
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3,
182 23 Prague 8, Czech Republic
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Glöckner A, Bannenberg T, Ibrom K, Daniliuc CG, Freytag M, Jones PG, Walter MD, Tamm M. Flexibility of an Open Indenyl Ligand in Iron(II) Complexes. Organometallics 2012. [DOI: 10.1021/om3003009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Andreas Glöckner
- 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
| | - Kerstin Ibrom
- NMR-Labor der Chemischen Institute, Technische Universität Braunschweig, Hagenring
30, 38106 Braunschweig, Germany
| | - Constantin G. Daniliuc
- 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
| | - Marc D. Walter
- 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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33
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Semproni SP, Milsmann C, Chirik PJ. Side-on Dinitrogen Complexes of Titanocenes with Disubstituted Cyclopentadienyl Ligands: Synthesis, Structure, and Spectroscopic Characterization. Organometallics 2012. [DOI: 10.1021/om300156z] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Scott P. Semproni
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Carsten Milsmann
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Paul J. Chirik
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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34
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Maekawa M, Daniliuc CG, Freytag M, Jones PG, Walter MD. Complexes of manganese, iron and cobalt with sterically demanding indenyl ligands. Dalton Trans 2012; 41:10317-27. [PMID: 22772481 DOI: 10.1039/c2dt31136d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Miyuki Maekawa
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Braunschweig, Germany
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35
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Glöckner A, Bauer H, Maekawa M, Bannenberg T, Daniliuc CG, Jones PG, Sun Y, Sitzmann H, Tamm M, Walter MD. How big is a Cp? Cycloheptatrienyl zirconium complexes with bulky cyclopentadienyl and indenyl ligands. Dalton Trans 2012; 41:6614-24. [DOI: 10.1039/c2dt12132h] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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36
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Maekawa M, Römelt M, Daniliuc CG, Jones PG, White PS, Neese F, Walter MD. Reactivity studies on [Cp′MnX(thf)]2: manganese amide and polyhydride synthesis. Chem Sci 2012. [DOI: 10.1039/c2sc20737k] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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37
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Tiong PJ, Nova A, Schwarz AD, Selby JD, Clot E, Mountford P. Site selectivity and reversibility in the reactions of titanium hydrazides with Si–H, Si–X, C–X and H+ reagents: TiNα 1,2-silane addition, Nβ alkylation, Nα protonation and σ-bond metathesis. Dalton Trans 2012; 41:2277-88. [PMID: 22223159 DOI: 10.1039/c2dt12359b] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Pei Jen Tiong
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, UK OX1 3TA
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38
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Dietrich HM, Törnroos KW, Anwander R. LaAl3Et12: ein homoleptischer Lanthanethylkomplex. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201105251] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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39
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Dietrich HM, Törnroos KW, Anwander R. LaAl3Et12: A Homoleptic Ethyllanthanum Complex. Angew Chem Int Ed Engl 2011; 50:12089-93. [DOI: 10.1002/anie.201105251] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2011] [Indexed: 11/07/2022]
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40
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Peng B, Cheng F, Li QS, Xie Y, Bruce King R, Schaefer HF. Structural and thermodynamic aspects of the dissociation of cyclopentadienyl rings from homoleptic cyclopentadienyl early transition metal, cerium, and thorium derivatives. Chem Phys 2011. [DOI: 10.1016/j.chemphys.2011.03.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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41
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Walter MD, Grunenberg J, White PS. Reactivity studies on [Cp′FeI]2: From iron hydrides to P4-activation. Chem Sci 2011. [DOI: 10.1039/c1sc00413a] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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42
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Trunkely EF, Epshteyn A, Zavalij PY, Sita LR. Synthesis, Structural Characterization, and Preliminary Reactivity Profile of a Series of Monocyclopentadienyl, Monoacetamidinate Titanium(III) Alkyl Complexes Bearing β-Hydrogens. Organometallics 2010. [DOI: 10.1021/om100877d] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Emily F. Trunkely
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Albert Epshteyn
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Peter Y. Zavalij
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Lawrence R. Sita
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
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43
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Fontaine PP, Yonke BL, Zavalij PY, Sita LR. Dinitrogen Complexation and Extent of N≡N Activation within the Group 6 “End-On-Bridged” Dinuclear Complexes, {(η5-C5Me5)M[N(i-Pr)C(Me)N(i-Pr)]}2(μ-η1:η1-N2) (M = Mo and W). J Am Chem Soc 2010; 132:12273-85. [DOI: 10.1021/ja100469f] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Philip P. Fontaine
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742
| | - Brendan L. Yonke
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742
| | - Peter Y. Zavalij
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742
| | - Lawrence R. Sita
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742
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44
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Pinkas J, Lukešová L, Gyepes R, Císařová I, Kubišta J, Horáček M, Mach K. Reduction-Induced Exclusive Activation of the ansa-1,2-Bis(dimethylsilylene)ethane Chain in ansa-Permethyltitanocene Compounds. Organometallics 2010. [DOI: 10.1021/om1003623] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jiří Pinkas
- J. Heyrovský Institute
of Physical Chemistry, Academy of Sciences of the Czech Republic,
v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
| | - Lenka Lukešová
- J. Heyrovský Institute
of Physical Chemistry, Academy of Sciences of the Czech Republic,
v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
| | - Róbert Gyepes
- Department of Inorganic Chemistry, Charles University, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry, Charles University, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Jiří Kubišta
- J. Heyrovský Institute
of Physical Chemistry, Academy of Sciences of the Czech Republic,
v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
| | - Michal Horáček
- J. Heyrovský Institute
of Physical Chemistry, Academy of Sciences of the Czech Republic,
v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
| | - Karel Mach
- J. Heyrovský Institute
of Physical Chemistry, Academy of Sciences of the Czech Republic,
v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
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45
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Chirik PJ. Group 4 Transition Metal Sandwich Complexes: Still Fresh after Almost 60 Years. Organometallics 2010. [DOI: 10.1021/om100016p] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Paul J. Chirik
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853
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46
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Pinkas J, Císařová I, Conde A, Fandos R, Horáček M, Kubišta J, Mach K. Thermolysis of titanocene methyl compounds bearing t-butyl- and benzyltetramethylcyclopentadienyl ligands. J Organomet Chem 2009. [DOI: 10.1016/j.jorganchem.2009.01.039] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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