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Hipólito J, Meyrelles R, Maryasin B, Alves LG, Martins AM. Reactions of Heteroallenes with Salan-based Ti(IV) Complexes: A Joint Experimental and Computational Study. Chem Asian J 2024; 19:e202400165. [PMID: 38403858 DOI: 10.1002/asia.202400165] [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: 02/15/2024] [Accepted: 02/22/2024] [Indexed: 02/27/2024]
Abstract
The reaction of Ti(NMe2)4 with the salan ligand precursor H2N2O2H2 led to the formation of [(L*)Ti(NHMe2)2] (L*=N2O2 4-) that forms [(H2N2O2)TiCl2] upon reaction with two equiv. of Me3SiCl. [(L*)Ti(py)2] was obtained from the reaction of [Ti(NtBu)Cl2(py)3] with the sodium salt H2N2O2Na2. Treatment of [(L*)Ti(NHMe2)2] with two equiv. of tBuNCO led to the insertion of the isocyanate molecules into the Ti-Nsalan bonds with the formation of [{L*(N(tBu)CO)2}Ti]. Conversely, the reaction of [(H2N2O2)Ti(OiPr)2] with two equiv. of tBuNCO led to the insertion of one isocyanate molecule into a Ti-Nsalan bond with the formation of [{(HN2O2)(N(tBu)CO)}Ti(OiPr)]. Computational studies were performed to gain insight into the reactivity of isocyanates with salan-based Ti(IV) complexes.
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Affiliation(s)
- Joana Hipólito
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001, Lisboa, Portugal
| | - Ricardo Meyrelles
- Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090, Vienna, Austria
- Institute of Theoretical Chemistry, University of Vienna, Währinger Strasse 17, 1090, Vienna, Austria
- Doctoral School in Chemistry, University of Vienna, Währinger Strasse 42, 1090, Vienna, Austria
| | - Boris Maryasin
- Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090, Vienna, Austria
- Institute of Theoretical Chemistry, University of Vienna, Währinger Strasse 17, 1090, Vienna, Austria
| | - Luis G Alves
- Centro de Química Estrutural - Institute of Molecular Sciences, Associação do Instituto Superior Técnico para a Investigação e Desenvolvimento, Av. António José de Almeida Lisboa, n°12, 1000-043, Lisboa, Portugal
| | - Ana M Martins
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001, Lisboa, Portugal
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2
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Oloyede UN, Flowers RA. Coordination-induced bond weakening and small molecule activation by low-valent titanium complexes. Dalton Trans 2024; 53:2413-2441. [PMID: 38224159 DOI: 10.1039/d3dt03454b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2024]
Abstract
Bond activation of small molecules through coordination to low valent metal complexes in M⋯X-H type interactions (where X = O, N, B, Si, etc.) leads to the formation of unusually weak X-H bonds and provides a powerful approach for the synthesis of target compounds under very mild conditions. Coordination of small molecules like water, amides, silanes, boranes, and dinitrogen to Ti(III) or Ti(II) complexes results in the synergetic redistribution of electrons between the metal orbitals and the ligand orbitals which weakens and enables the facile cleavage of the X-H or N-N bonds of the ligands. This review presents an overview of coordination-induced bond activation of small molecules by low valent titanium complexes. In particular, the applications of low valent titanium-induced bond weakening in nitrogen fixation are presented. The review concludes with potential future directions for work in this area including low-valent Ti-based PCET systems, photocatalytic nitrogen reduction, and approaches to tailoring complexes for optimal bond activation.
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Affiliation(s)
| | - Robert A Flowers
- Department of Chemistry, Lehigh University, Bethlehem, Pennsylvania 18015, USA.
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3
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Winslow C, Rathke P, Rittle J. Multielectron Bond Cleavage Processes Enabled by Redox-Responsive Phosphinimide Ligands. Inorg Chem 2023; 62:17697-17704. [PMID: 37847032 PMCID: PMC10618924 DOI: 10.1021/acs.inorgchem.3c02307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Indexed: 10/18/2023]
Abstract
The activation of small molecules via multielectron redox processes offers promise in mediating difficult transformations related to energy conversion processes. While molecular systems that engage in one- and two-electron redox processes are widespread, those that participate in the direct transfer of four or more electrons to small molecules are very rare. To that end, we report a mononuclear CrII complex competent for the 4-electron reduction of dioxygen (O2) and nitrosoarenes. These systems additionally engage in facile two-electron group transfer reactivity, including O atom excision and nitrene transfer. Structural, spectroscopic, and computational studies support bond activation processes that intimately occur at a mononuclear chromium(phosphinimide) center and highlight the unusual structural responsiveness of the phosphinimides in stabilizing a range of metal redox states.
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Affiliation(s)
- Charles
C. Winslow
- Department of Chemistry, University
of California, Berkeley, California 94720, United States
| | - Paul Rathke
- Department of Chemistry, University
of California, Berkeley, California 94720, United States
| | - Jonathan Rittle
- Department of Chemistry, University
of California, Berkeley, California 94720, United States
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4
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Mohar JS, Reinholdt A, Keller TM, Carroll PJ, Telser J, Mindiola DJ. A mononuclear, terminal titanium(III) imido. Chem Commun (Camb) 2023; 59:10101-10104. [PMID: 37417771 PMCID: PMC10777895 DOI: 10.1039/d3cc01758c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/08/2023]
Abstract
We report the first mononuclear TiIII complex possessing a terminal imido ligand. Complex [TptBu,MeTi{NSi(CH3)3}(THF)] (2) (TptBu,Me = hydridotris(3-tert-butyl-5-methylpyrazol-1-yl)borate) is prepared by reduction of [TptBu,MeTi{NSi(CH3)3}(Cl)] (1) with KC8 in high yield. The connectivity and metalloradical nature of 2 were confirmed by single crystal X-ray diffraction studies, Q- and X-band EPR, UV-Vis and 1H NMR spectroscopies. The d1 complex [(TptBu,Me)TiCl(OEt2)][B(C6F5)4] (3), was prepared to spectroscopically compare it to 2. Electrochemical studies of 1 and 2 reveal a reversible 1e- process, and chemical oxidants ClCPh3 or 1/2 eq. XeF2 react cleanly with 2 yielding 1 or the fluoride derivative [TptBu,MeTi{NSi(CH3)3}(F)] (4), respectively.
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Affiliation(s)
- Jacob S Mohar
- Department of Chemistry, University of Pennsylvania, 231 S 34th Street, Philadelphia, Pennsylvania, USA.
| | - Anders Reinholdt
- Department of Chemistry, University of Pennsylvania, 231 S 34th Street, Philadelphia, Pennsylvania, USA.
| | - Taylor M Keller
- Department of Chemistry, University of Pennsylvania, 231 S 34th Street, Philadelphia, Pennsylvania, USA.
| | - Patrick J Carroll
- Department of Chemistry, University of Pennsylvania, 231 S 34th Street, Philadelphia, Pennsylvania, USA.
| | - Joshua Telser
- Department of Biological, Physical and Health Sciences, Roosevelt University, Chicago, Illinois, USA.
| | - Daniel J Mindiola
- Department of Chemistry, University of Pennsylvania, 231 S 34th Street, Philadelphia, Pennsylvania, USA.
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5
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Zhizhko PA, Bushkov NS, Pichugov AV, Zarubin DN. Oxo/imido heterometathesis: From molecular stoichiometric studies to well-defined heterogeneous catalysts. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.214112] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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6
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Evans MJ, Burke FM, Chapple PM, Fulton JR. Synthesis and Reactivity of Acyclic Germanimines: Silyl Rearrangement and Cycloadditions. Inorg Chem 2021; 60:8293-8303. [PMID: 33988988 DOI: 10.1021/acs.inorgchem.1c00971] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report the synthesis of aromatic germanimines [(HMDS)2Ge═NAr] (Ar = Ph, Mes, Dipp; Mes = 2,4,6-Me3C6H2, Dipp = 2,6-iPr2C6H3) and an investigation into their associated reactivity. [(HMDS)2Ge═NPh] decomposes above -30 °C, while [(HMDS)2Ge═NDipp] engages in an intramolecular reaction at 60 °C. [(HMDS)2Ge═NMes] was shown to rearrange via a 1,3-silyl migration to give [(HMDS){(SiMe3)(Mes)N}Ge(NSiMe3)] in a 1:7 equilibrium mixture at room temperature. These latter germanimines react with unsaturated polar substrates such as CO2, ketones, and arylisocyanate via a [2 + 2] cycloaddition pathway.
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Affiliation(s)
- Matthew J Evans
- School of Chemical and Physical Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6012, New Zealand
| | - Finlay M Burke
- School of Chemical and Physical Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6012, New Zealand
| | - Peter M Chapple
- School of Chemical and Physical Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6012, New Zealand
| | - J Robin Fulton
- School of Chemical and Physical Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6012, New Zealand
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7
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Rumyantsev AV, Pichugov AV, Bushkov NS, Aleshin DY, Strelkova TV, Lependina OL, Zhizhko PA, Zarubin DN. Direct imidation of lactones via catalytic oxo/imido heterometathesis. Chem Commun (Camb) 2021; 57:2625-2628. [PMID: 33587064 DOI: 10.1039/d0cc08274k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
We report the first examples of direct imidation of lactones giving the corresponding cyclic imidates via oxo/imido heterometathesis with N-sulfinylamines catalysed by a well-defined silica-supported Ti imido complex.
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Affiliation(s)
- Andrey V Rumyantsev
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, Moscow 119991, Russia. and Department of Chemistry, Moscow State University, Vorob'evy Gory, 1, Moscow 119991, Russia
| | - Andrey V Pichugov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, Moscow 119991, Russia. and Higher Chemical College, D. Mendeleev University of Chemical Technology of Russia, Miusskaya sq., 9, Moscow 125047, Russia
| | - Nikolai S Bushkov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, Moscow 119991, Russia. and Department of Chemistry, Moscow State University, Vorob'evy Gory, 1, Moscow 119991, Russia
| | - Dmitry Yu Aleshin
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, Moscow 119991, Russia. and Higher Chemical College, D. Mendeleev University of Chemical Technology of Russia, Miusskaya sq., 9, Moscow 125047, Russia
| | - Tatyana V Strelkova
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, Moscow 119991, Russia.
| | - Olga L Lependina
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, Moscow 119991, Russia.
| | - Pavel A Zhizhko
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, Moscow 119991, Russia.
| | - Dmitry N Zarubin
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, Moscow 119991, Russia.
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8
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Fostvedt JI, Grant LN, Kriegel BM, Obenhuber AH, Lohrey TD, Bergman RG, Arnold J. 1,2-Addition and cycloaddition reactions of niobium bis(imido) and oxo imido complexes. Chem Sci 2020; 11:11613-11632. [PMID: 34094408 PMCID: PMC8162998 DOI: 10.1039/d0sc03489d] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 09/28/2020] [Indexed: 11/21/2022] Open
Abstract
The bis(imido) complexes (BDI)Nb(N t Bu)2 and (BDI)Nb(N t Bu)(NAr) (BDI = N,N'-bis(2,6-diisopropylphenyl)-3,5-dimethyl-β-diketiminate; Ar = 2,6-diisopropylphenyl) were shown to engage in 1,2-addition and [2 + 2] cycloaddition reactions with a wide variety of substrates. Reaction of the bis(imido) complexes with dihydrogen, silanes, and boranes yielded hydrido-amido-imido complexes via 1,2-addition across Nb-imido π-bonds; some of these complexes were shown to further react via insertion of carbon dioxide to give formate-amido-imido products. Similarly, reaction of (BDI)Nb(N t Bu)2 with tert-butylacetylene yielded an acetylide-amido-imido complex. In contrast to these results, many related mono(imido) Nb BDI complexes do not exhibit 1,2-addition reactivity, suggesting that π-loading plays an important role in activating the Nb-N π-bonds toward addition. The same bis(imido) complexes were also shown to engage in [2 + 2] cycloaddition reactions with oxygen- and sulfur-containing heteroallenes to give carbamate- and thiocarbamate-imido complexes: some of these complexes readily dimerized to give bis-μ-sulfido, bis-μ-iminodicarboxylate, and bis-μ-carbonate complexes. The mononuclear carbamate imido complex (BDI)Nb(NAr)(N( t Bu)CO2) (12) could be induced to eject tert-butylisocyanate to generate a four-coordinate terminal oxo imido intermediate, which could be trapped as the five-coordinate pyridine or DMAP adduct. The DMAP adducted oxo imido complex (BDI)NbO(NAr)(DMAP) (16) was shown to engage in 1,2-addition of silanes across the Nb-oxo π-bond; this represents a new reaction pathway in group 5 chemistry.
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Affiliation(s)
- Jade I Fostvedt
- Department of Chemistry, University of California Berkeley CA 94720 USA
| | - Lauren N Grant
- Department of Chemistry, University of California Berkeley CA 94720 USA
| | | | | | - Trevor D Lohrey
- Department of Chemistry, University of California Berkeley CA 94720 USA
- Chemical Sciences Division, Lawrence Berkeley National Laboratory 1 Cyclotron Road Berkeley CA 94720 USA
| | - Robert G Bergman
- Department of Chemistry, University of California Berkeley CA 94720 USA
| | - John Arnold
- Department of Chemistry, University of California Berkeley CA 94720 USA
- Chemical Sciences Division, Lawrence Berkeley National Laboratory 1 Cyclotron Road Berkeley CA 94720 USA
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9
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Lohrey TD, Cortes EA, Fostvedt JI, Oanta AK, Jain A, Bergman RG, Arnold J. Diverse Reactivity of a Rhenium(V) Oxo Imido Complex: [2 + 2] Cycloadditions, Chalcogen Metathesis, Oxygen Atom Transfer, and Protic and Hydridic 1,2-Additions. Inorg Chem 2020; 59:11096-11107. [DOI: 10.1021/acs.inorgchem.0c01589] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Trevor D. Lohrey
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Emmanuel A. Cortes
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Jade I. Fostvedt
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Alexander K. Oanta
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Anukta Jain
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Robert G. Bergman
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - John Arnold
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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10
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Kawakita K, Kakiuchi Y, Tsurugi H, Mashima K, Parker BF, Arnold J, Tonks IA. Reactivity of terminal imido complexes of group 4-6 metals: stoichiometric and catalytic reactions involving cycloaddition with unsaturated organic molecules. Coord Chem Rev 2020; 407:213118. [PMID: 32863399 PMCID: PMC7453927 DOI: 10.1016/j.ccr.2019.213118] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Imido complexes of early transition metals are key intermediates in the synthesis of many nitrogen-containing organic compounds. The metal-nitrogen double bond of the imido moiety undergoes [2+2] cycloaddition reactions with various unsaturated organic molecules to form new nitrogen-carbon and nitrogen-heteroatom bonds. This review article focuses on reactivity of the terminal imido complexes of Group 4-6 metals, summarizing their stoichiometric reactions and catalytic applications for a variety of reactions including alkyne hydroamination, alkyne carboamination, pyrrole formation, imine metathesis, and condensation reactions of carbonyl compounds with isocyanates.
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Affiliation(s)
- Kento Kawakita
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Yuya Kakiuchi
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Hayato Tsurugi
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Kazushi Mashima
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Bernard F. Parker
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - John Arnold
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Ian A. Tonks
- Department of Chemistry, University of Minnesota—Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
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11
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Evans MJ, Anker MD, Mouchfiq A, Lein M, Fulton JR. The “Metallo”‐Diels–Alder Reactions: Examining the Metalloid Behavior of Germanimines. Chemistry 2020; 26:2606-2609. [DOI: 10.1002/chem.201905693] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Matthew J. Evans
- School of Chemical and Physical SciencesVictoria University of Wellington, PO Box 600 Wellington 6012 New Zealand
| | - Mathew D. Anker
- School of Chemical and Physical SciencesVictoria University of Wellington, PO Box 600 Wellington 6012 New Zealand
| | - Ahmed Mouchfiq
- School of Chemical and Physical SciencesVictoria University of Wellington, PO Box 600 Wellington 6012 New Zealand
| | - Matthias Lein
- School of Chemical and Physical SciencesVictoria University of Wellington, PO Box 600 Wellington 6012 New Zealand
| | - J. Robin Fulton
- School of Chemical and Physical SciencesVictoria University of Wellington, PO Box 600 Wellington 6012 New Zealand
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12
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Zhizhko PA, Pichugov AV, Bushkov NS, Rumyantsev AV, Utegenov KI, Talanova VN, Strelkova TV, Lebedev D, Mance D, Zarubin DN. Catalytic Imido-Transfer Reactions of Well-Defined Silica-Supported Titanium Imido Complexes Prepared via Surface Organometallic Chemistry. Organometallics 2020. [DOI: 10.1021/acs.organomet.9b00779] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pavel A. Zhizhko
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119991 Moscow, Russia
| | - Andrey V. Pichugov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119991 Moscow, Russia
- Higher Chemical College, D. Mendeleev University of Chemical Technology of Russia, Miusskaya sq., 9, 125047 Moscow, Russia
| | - Nikolai S. Bushkov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119991 Moscow, Russia
- Department of Chemistry, Moscow State University, Vorob’evy Gory, 1, 119991 Moscow, Russia
| | - Andrey V. Rumyantsev
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119991 Moscow, Russia
- Department of Chemistry, Moscow State University, Vorob’evy Gory, 1, 119991 Moscow, Russia
| | - Kamil I. Utegenov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119991 Moscow, Russia
| | - Valeria N. Talanova
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119991 Moscow, Russia
| | - Tatyana V. Strelkova
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119991 Moscow, Russia
| | - Dmitry Lebedev
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog Weg, 1−5, CH-8093 Zürich, Switzerland
| | - Deni Mance
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog Weg, 1−5, CH-8093 Zürich, Switzerland
| | - Dmitry N. Zarubin
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119991 Moscow, Russia
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13
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Lapsheva EN, Cheisson T, Álvarez Lamsfus C, Carroll PJ, Gau MR, Maron L, Schelter EJ. Reactivity of Ce(iv) imido compounds with heteroallenes. Chem Commun (Camb) 2020; 56:4781-4784. [DOI: 10.1039/c9cc10052k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactivity of alkali metal capped Ce(iv) imido compounds [M(DME)2][CeNArF(TriNOx)] (1-M with M = K, Rb, Cs and ArF = 3,5-bis(trifluoromethyl)phenyl) with CO2 and organic isocyanates has been evaluated.
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Affiliation(s)
- Ekaterina N. Lapsheva
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | - Thibault Cheisson
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | | | - Patrick J. Carroll
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | - Michael R. Gau
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | - Laurent Maron
- LPCNO
- CNRS & INSA
- Université Paul Sabatier
- 31077 Toulouse
- France
| | - Eric J. Schelter
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
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14
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Beaumier EP, McGreal ME, Pancoast AR, Wilson RH, Moore JT, Graziano BJ, Goodpaster JD, Tonks IA. Carbodiimide Synthesis via Ti-Catalyzed Nitrene Transfer from Diazenes to Isocyanides. ACS Catal 2019; 9:11753-11762. [PMID: 34113477 DOI: 10.1021/acscatal.9b04107] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Simple Ti imido halide complexes such as [Br2Ti(N t Bu)py2]2 are competent catalysts for the synthesis of unsymmetrical carbodiimides via Ti-catalyzed nitrene transfer from diazenes or azides to isocyanides. Both alkyl and aryl isocyanides are compatible with the reaction conditions, although product inhibition with sterically unencumbered substrates sometimes limits the yield when diazenes are employed as the oxidant. The reaction mechanism has been investigated both experimentally and computationally, wherein a key feature is that the product release is triggered by electron transfer from an η 2-carbodiimide to a Ti-bound azobenzene. This ligand-to-ligand redox buffering obviates the need for high-energy formally TiII intermediates and provides further evidence that substrate and product "redox noninnocence" can promote unusual Ti redox catalytic transformations.
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Affiliation(s)
- Evan P. Beaumier
- Department of Chemistry, University of Minnesota-Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Meghan E. McGreal
- Department of Chemistry, University of Minnesota-Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Adam R. Pancoast
- Department of Chemistry, University of Minnesota-Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - R. Hunter Wilson
- Department of Chemistry, University of Minnesota-Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - James T. Moore
- Department of Chemistry, University of Minnesota-Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Brendan J. Graziano
- Department of Chemistry, University of Minnesota-Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Jason D. Goodpaster
- Department of Chemistry, University of Minnesota-Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Ian A. Tonks
- Department of Chemistry, University of Minnesota-Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
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15
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Rahman MM, Smith MD, Peryshkov DV. Imido Group Interchange in Reactions of Zwitterionic Tantalum(V) Vinylimido Complexes and Nitriles. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00241] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Md. Mamdudur Rahman
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Mark D. Smith
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Dmitry V. Peryshkov
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, South Carolina 29208, United States
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16
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Zhizhko PA, Pichugov AV, Bushkov NS, Allouche F, Zhizhin AA, Zarubin DN, Ustynyuk NA. Catalytic Oxo/Imido Heterometathesis by a Well-Defined Silica-Supported Titanium Imido Complex. Angew Chem Int Ed Engl 2018; 57:10879-10882. [PMID: 29902359 DOI: 10.1002/anie.201804346] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Indexed: 11/06/2022]
Abstract
Grafting Ti(=NtBu)(Me2 Pyr)2 (py)2 (Me2 Pyr= 2,5-dimethylpyrrolyl, py=pyridine) onto the surface of silica partially dehydroxylated at 700 °C gives the well-defined silica-supported Ti imido complex (≡SiO)Ti(=NtBu)(Me2 Pyr)(py)2 , which is fully characterized by IR and solid-state NMR spectroscopy as well as elemental and mass balance analyses. While stoichiometric imido-transfer reactivity is typical for Ti imides, the obtained surface complex is unique in that it enables catalytic transformations involving Ti imido and oxo intermediates. In particular, it efficiently catalyzes imidation of carbonyl compounds with N-sulfinylamines by oxo/imido heterometathesis.
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Affiliation(s)
- Pavel A Zhizhko
- Laboratory for Organometallic Compounds, A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119991, Moscow, Russia
| | - Andrey V Pichugov
- Laboratory for Organometallic Compounds, A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119991, Moscow, Russia.,Higher Chemical College, D. Mendeleev University of Chemical Technology of Russia, Miusskaya sq., 9, 125047, Moscow, Russia
| | - Nikolai S Bushkov
- Laboratory for Organometallic Compounds, A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119991, Moscow, Russia.,Chemistry Department, Moscow State University, Vorob'evy Gory, 1, 119992, Moscow, Russia
| | - Florian Allouche
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog Weg 1-5, 8093, Zürich, Switzerland
| | - Anton A Zhizhin
- Laboratory for Organometallic Compounds, A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119991, Moscow, Russia
| | - Dmitry N Zarubin
- Laboratory for Organometallic Compounds, A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119991, Moscow, Russia
| | - Nikolai A Ustynyuk
- Laboratory for Organometallic Compounds, A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119991, Moscow, Russia
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17
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Zhizhko PA, Pichugov AV, Bushkov NS, Allouche F, Zhizhin AA, Zarubin DN, Ustynyuk NA. Catalytic Oxo/Imido Heterometathesis by a Well-Defined Silica-Supported Titanium Imido Complex. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201804346] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Pavel A. Zhizhko
- Laboratory for Organometallic Compounds; A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; Vavilov str., 28 119991 Moscow Russia
| | - Andrey V. Pichugov
- Laboratory for Organometallic Compounds; A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; Vavilov str., 28 119991 Moscow Russia
- Higher Chemical College; D. Mendeleev University of Chemical Technology of Russia; Miusskaya sq., 9 125047 Moscow Russia
| | - Nikolai S. Bushkov
- Laboratory for Organometallic Compounds; A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; Vavilov str., 28 119991 Moscow Russia
- Chemistry Department; Moscow State University; Vorob'evy Gory, 1 119992 Moscow Russia
| | - Florian Allouche
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir-Prelog Weg 1-5 8093 Zürich Switzerland
| | - Anton A. Zhizhin
- Laboratory for Organometallic Compounds; A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; Vavilov str., 28 119991 Moscow Russia
| | - Dmitry N. Zarubin
- Laboratory for Organometallic Compounds; A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; Vavilov str., 28 119991 Moscow Russia
| | - Nikolai A. Ustynyuk
- Laboratory for Organometallic Compounds; A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; Vavilov str., 28 119991 Moscow Russia
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18
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Manßen M, de Graaff S, Meyer MF, Schmidtmann M, Beckhaus R. Direct Access to Titanocene Imides via Bis(η5:η1-penta-fulvene)titanium Complexes and Primary Amines. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00264] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Manfred Manßen
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
| | - Simon de Graaff
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
| | - May-Franzis Meyer
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
| | - Marc Schmidtmann
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
| | - Rüdiger Beckhaus
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
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19
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Fischer M, Schmidtmann M, Beckhaus R. From Five to Five: Titanium Ketimine Complexes with Monoaza-butadiene η4-Coordination Mode and Hidden η2-Imine Reactivity. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00673] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Malte Fischer
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
| | - Marc Schmidtmann
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
| | - Rüdiger Beckhaus
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
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20
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Clough BA, Mellino S, Protchenko AV, Slusarczyk M, Stevenson LC, Blake MP, Xie B, Clot E, Mountford P. New Titanium Borylimido Compounds: Synthesis, Structure, and Bonding. Inorg Chem 2017; 56:10794-10814. [PMID: 28836774 DOI: 10.1021/acs.inorgchem.7b01831] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report a combined experimental and computational study of the synthesis and electronic structure of titanium borylimido compounds. Three new synthetic routes to this hitherto almost unknown class of Group 4 imide are presented. The double-deprotonation reaction of the borylamine H2NB(NAr'CH)2 (Ar' = 2,6-C6H3iPr2) with Ti(NMe2)2Cl2 gave Ti{NB(NAr'CH)2}Cl2(NHMe2)2, which was easily converted to Ti{NB(NAr'CH)2}Cl2(py)3. This compound is an entry point to other borylimides, for example, reacting with Li2N2pyrNMe to form Ti(N2pyrNMe){NB(NAr'CH)2}(py)2 and with 2 equiv of NaCp to give Cp2Ti{NB(NAr'CH)2}(py) (23). Borylamine-tert-butylimide exchange between H2NB(NAr'CH)2 and Cp*Ti(NtBu)Cl(py) under forcing conditions afforded Cp*Ti{NB(NAr'CH)2}Cl(py), which could be further substituted with guanidinate or pyrrolide-amine ligands to give Cp*Ti(hpp){NB(NAr'CH)2} (16) and Cp*Ti(NpyrNMe2){NB(NAr'CH)2} (17). The Ti-Nim distances in compounds with the NB(NAr'CH)2 ligand were comparable to those of the corresponding arylimides. Dialkyl- or diaryl-substituted borylamines do not undergo the analogous double-deprotonation or imide-amine exchange reactions. Reaction of (Cp″2Ti)2(μ2:η1,η1-N2) with N3BMes2 gave the base-free, diarylborylimide Cp″2Ti(NBMes2) (26) by an oxidative route; this compound has a relatively long Ti-Nim bond and large Cp″-Ti-Cp″ angle. Reaction of 16 with H2NtBu formed equilibrium mixtures with H2NB(NAr'CH)2 and Cp*Ti(hpp)(NtBu) (ΔrG = -1.0 kcal mol-1). In contrast, the dialkylborylimide Cp*Ti{MeC(NiPr)2}(NBC8H14) (2) reacted quantitatively with H2NtBu to give the corresponding tert-butylimide and borylamine. The electronic structures and imide-amine exchange reactions of half-sandwich and sandwich titanium borylimides have been evaluated using density functional theory (DFT), supported by quantum theory of atoms in molecules (QTAIM) and natural bond orbital (NBO) analysis, and placed more generally in context with the well-established alkyl- and arylimides and hydrazides. The calculations find that Ti-Nim bonds for borylimides are stronger and more covalent than in their organoimido or hydrazido analogues, and are strongest for alkyl- and arylborylimides. Borylamine-tert-butylimide exchange reactions fail for H2NBR2 (R = hydrocarbyl) but not for H2NB(NAr'CH)2 because the increased strength of the new Ti-Nim bond for the former is outweighed by the increased net H-N bond strengths in the borylamine. Variation of the Ti-Nim bond length over short distances is dominated by π-interactions with any appropriate orbital on the Nim atom organic substituent. However, over the full range of imides and hydrazides studied, overall bond energies do not correlate with bond length but with the Ti-Nim σ-bond character and the orthogonal π-interaction.
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Affiliation(s)
- Benjamin A Clough
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford , Mansfield Road, Oxford OX1 3TA, U.K
| | - Simona Mellino
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford , Mansfield Road, Oxford OX1 3TA, U.K
| | - Andrey V Protchenko
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford , Mansfield Road, Oxford OX1 3TA, U.K
| | - Martin Slusarczyk
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford , Mansfield Road, Oxford OX1 3TA, U.K
| | - Laura C Stevenson
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford , Mansfield Road, Oxford OX1 3TA, U.K
| | - Matthew P Blake
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford , Mansfield Road, Oxford OX1 3TA, U.K
| | - Bowen Xie
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford , Mansfield Road, Oxford OX1 3TA, U.K
| | - Eric Clot
- Institut Charles Gerhardt Montpellier, UMR 5253, CNRS-UM-ENSCM, Université de Montpellier , cc 1501, Place Eugéne Bataillon, F-34095 Montpellier Cedex 5, France
| | - Philip Mountford
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford , Mansfield Road, Oxford OX1 3TA, U.K
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21
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Mellino S, Stevenson LC, Clot E, Mountford P. Reactions of Titanium Imides and Hydrazides with Boranes. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00477] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Simona Mellino
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Laura C. Stevenson
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Eric Clot
- Institut
Charles Gerhardt Montpellier, UMR 5253 CNRS-UM-ENSCM, Université de Montpellier, cc 1501, Place Eugéne Bataillon, F-34095 Montpellier Cedex 5, France
| | - Philip Mountford
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
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22
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Kelly RP, Falcone M, Lamsfus CA, Scopelliti R, Maron L, Meyer K, Mazzanti M. Metathesis of a U V imido complex: a route to a terminal U V sulfide. Chem Sci 2017; 8:5319-5328. [PMID: 28970911 PMCID: PMC5607896 DOI: 10.1039/c7sc01111c] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Accepted: 05/25/2017] [Indexed: 11/21/2022] Open
Abstract
The metathesis reaction of a UV imido complex supported by sterically demanding tris(tert-butoxy)siloxide ligands with CS2 afforded a terminal UV thiocarbonate but metathesis with H2S afforded the first example of a terminal UV sulfide.
Herein, we report the synthesis and characterisation of the first terminal uranium(v) sulfide and a related UV trithiocarbonate complex supported by sterically demanding tris(tert-butoxy)siloxide ligands. The reaction of the potassium-bound UV imido complex, [U(NAd){OSi(OtBu)3}4K] (4), with CS2 led to the isolation of perthiodicarbonate [K(18c6)]2[C2S6] (6), with concomitant formation of the UIV complex, [U{OSi(OtBu)3}4], and S
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CNAd. In contrast, the reaction of the UV imido complex, [K(2.2.2-cryptand)][U(NAd){OSi(OtBu)3}4] (5), with one or two equivalents of CS2 afforded the trithiocarbonate complex, [K(2.2.2-cryptand)][U(CS3){OSi(OtBu)3}4] (7), which was isolated in 57% yield, with concomitant elimination of the admantyl thiocyanate product, SCNAd. Complex 7 is likely formed by fast nucleophilic addition of a UV terminal sulfide intermediate, resulting from the slow metathesis reaction of the imido complex with CS2, to a second CS2 molecule. The addition of a solution of H2S in thf (1.3 eq.) to 4 afforded the first isolable UV terminal sulfide complex, [K(2.2.2-cryptand)][US{OSi(OtBu)3}4] (8), in 41% yield. Based on DFT calculations, triple-bond character with a strong covalent interaction is suggested for the U–S bond in complex 7.
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Affiliation(s)
- Rory P Kelly
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland .
| | - Marta Falcone
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland .
| | - Carlos Alvarez Lamsfus
- Université de Toulouse et CNRS INSA , UPS , CNRS , UMR 5215 , LPCNO , 135 avenue de Rangueil , 31077 Toulouse , France
| | - Rosario Scopelliti
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland .
| | - Laurent Maron
- Université de Toulouse et CNRS INSA , UPS , CNRS , UMR 5215 , LPCNO , 135 avenue de Rangueil , 31077 Toulouse , France
| | - Karsten Meyer
- Department of Chemistry and Pharmacy , Inorganic Chemistry , Friedrich-Alexander University Erlangen-Nürnberg , Egerlandstraße 1 , 91058 Erlangen , Germany
| | - Marinella Mazzanti
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland .
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23
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Werner D, Deacon GB, Junk PC, Anwander R. Facile Reversible Benzophenone Insertion into Rare‐Earth Metal Pyrazolate Complexes. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700635] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Daniel Werner
- Institut für Anorganische Chemie University of Tübingen (EKUT) Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Glen B. Deacon
- School of Chemistry Monash University 3800 Clayton Victoria Australia
| | - Peter C. Junk
- College of Science and Engineering James Cook University 4811 Townsville Queensland Australia
| | - Reiner Anwander
- Institut für Anorganische Chemie University of Tübingen (EKUT) Auf der Morgenstelle 18 72076 Tübingen Germany
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24
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Pálinkás N, Kollár L, Kégl T. Nature of the Metal-Ligand Interactions in Complexes M(PH 3
) 2
( η
2
-L) (M=Ni, Pd, Pt; L=CO 2
, COS, CS 2
): A Theoretical Study. ChemistrySelect 2017. [DOI: 10.1002/slct.201700897] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Noémi Pálinkás
- Department of Inorganic Chemistry; University of Pe'cs, and Szentágothai Research Centre; PO Box 266 H-7624 Pécs Hungary
| | - László Kollár
- Department of Inorganic Chemistry; University of Pe'cs, and Szentágothai Research Centre; PO Box 266 H-7624 Pécs Hungary
- MTA-PTE Research Group for Selective Chemical Syntheses; Ifjúság u. 6. H-7624 Pécs Hungary
| | - Tamás Kégl
- Department of Inorganic Chemistry; University of Pe'cs, and Szentágothai Research Centre; PO Box 266 H-7624 Pécs Hungary
- MTA-PTE Research Group for Selective Chemical Syntheses; Ifjúság u. 6. H-7624 Pécs Hungary
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25
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Heins SP, Wolczanski PT, Cundari TR, MacMillan SN. Redox non-innocence permits catalytic nitrene carbonylation by (dadi)Ti[double bond, length as m-dash]NAd (Ad = adamantyl). Chem Sci 2017; 8:3410-3418. [PMID: 28507712 PMCID: PMC5417046 DOI: 10.1039/c6sc05610e] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 03/03/2017] [Indexed: 12/21/2022] Open
Abstract
Application of the diamide, diimine {-CH[double bond, length as m-dash]N(1,2-C6H4)N(2,6-iPr2-C6H3)}2 m ((dadi) m ) ligand to titanium provided adducts (dadi)TiL x (1-L x ; L x = THF, PMe2Ph, (CNMe)2), which possess the redox formulation [(dadi)4-]Ti(iv)L x , and 22 πe- (4n + 2). Related complexes containing titanium-ligand multiple bonds, (dadi)Ti[double bond, length as m-dash]X (2 [double bond, length as m-dash]X; X = O, NAd), exhibit a different dadi redox state, [(dadi)2-]Ti(iv)X, consistent with 20 πe- (4n). The Redox Non-Innocence (RNI) displayed by dadi m impedes binding by CO, and permits catalytic conversion of AdN3 + CO to AdNCO + N2. Kinetics measurements support carbonylation of 2 [double bond, length as m-dash]NAd as the rate determining step. Structural and computational evidence for the observed RNI is provided.
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Affiliation(s)
- Spencer P Heins
- Cornell University , Dept. Chemistry & Chemical Biology , Baker Laboratory , Ithaca , NY 14853 , USA .
| | - Peter T Wolczanski
- Cornell University , Dept. Chemistry & Chemical Biology , Baker Laboratory , Ithaca , NY 14853 , USA .
| | - Thomas R Cundari
- University of North Texas , Dept. of Chemistry , CASCaM , Denton , TX 76201 , USA .
| | - Samantha N MacMillan
- Cornell University , Dept. Chemistry & Chemical Biology , Baker Laboratory , Ithaca , NY 14853 , USA .
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26
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Kiernicki JJ, Staun SL, Zeller M, Bart SC. A Uranium(IV) Triamide Species with Brønsted Basic Ligand Character: Metal–Ligand Cooperativity in the f Block. Organometallics 2017. [DOI: 10.1021/acs.organomet.6b00861] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- John J. Kiernicki
- H.C. Brown Laboratory, Department
of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Selena L. Staun
- H.C. Brown Laboratory, Department
of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Matthias Zeller
- H.C. Brown Laboratory, Department
of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Suzanne C. Bart
- H.C. Brown Laboratory, Department
of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
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27
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Ziegler JA, Bergman RG, Arnold J. Unusual κ1 coordination of a β-diketiminate ligand in niobium complexes. Dalton Trans 2016; 45:12661-8. [PMID: 27461382 DOI: 10.1039/c6dt02373h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Reaction of (BDI)Nb(N(t)Bu)Cl2py with NaCp results in the κ(1)-coordination of the BDI ligand in the complex (κ(1)-N,BDI)CpNb(N(t)Bu)Cl (2). Via chloride abstraction from 2, we develop synthetic routes to structurally analogous cationic and Nb(IV) pseudo-four coordinate complexes where the BDI ligand returns to the κ(2)-coordination mode. We compare these to our previously reported tetrahedral niobium bis(imido) complexes to investigate the effects of the Cp ligand on the properties of Nb-BDI-imido systems. Substitution of the chloride in 2 with a hydride also causes return to bidentate binding of the BDI ligand. The X-ray crystal structures of these complexes have been determined, and the structural parameters reflecting the consequences of the electronic differences are discussed.
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Affiliation(s)
- Jessica A Ziegler
- Department of Chemistry, University of California, Berkeley, California 94720, USA.
| | - Robert G Bergman
- Department of Chemistry, University of California, Berkeley, California 94720, USA.
| | - John Arnold
- Department of Chemistry, University of California, Berkeley, California 94720, USA.
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28
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Tsoureas N, Kilpatrick AFR, Inman CJ, Cloke FGN. Steric control of redox events in organo-uranium chemistry: synthesis and characterisation of U(v) oxo and nitrido complexes. Chem Sci 2016; 7:4624-4632. [PMID: 30155110 PMCID: PMC6013772 DOI: 10.1039/c6sc00632a] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 04/08/2016] [Indexed: 12/16/2022] Open
Abstract
Controlling the steric environment in U(η8-C8H6(1,4-SiR3)2)(η5-Cp*)] enables selective formation of either mononuclear U(v) or dinuclear U(iv) oxo and nitrido complexes.
The synthesis and molecular structures of a U(v) neutral terminal oxo complex and a U(v) sodium uranium nitride contact ion pair are described. The synthesis of the former is achieved by the use of tBuNCO as a mild oxygen transfer reagent, whilst that of the latter is via the reduction of NaN3. Both mono-uranium complexes are stabilised by the presence of bulky silyl substituents on the ligand framework that facilitate a 2e– oxidation of a single U(iii) centre. In contrast, when steric hindrance around the metal centre is reduced by the use of less bulky silyl groups, the products are di-uranium, U(iv) bridging oxo and (anionic) nitride complexes, resulting from 1e– oxidations of two U(iii) centres. SQUID magnetometry supports the formal oxidation states of the reported complexes. Electrochemical studies show that the U(v) terminal oxo complex can be reduced and the [U(iv)O]– anion was accessed via reduction with K/Hg, and structurally characterised. Both the nitride complexes display complex electrochemical behaviour but each exhibits a quasi-reversible oxidation at ca. –1.6 V vs. Fc+/0.
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Affiliation(s)
- Nikolaos Tsoureas
- School of Life Sciences , Division of Chemistry , University of Sussex , Falmer , Brighton , BN1 9QJ , UK .
| | - Alexander F R Kilpatrick
- Chemistry Research Laboratory , Department of Chemistry , University of Oxford , 12 Mansfield Road , OX1 3TA , Oxford , UK
| | - Christopher J Inman
- School of Life Sciences , Division of Chemistry , University of Sussex , Falmer , Brighton , BN1 9QJ , UK .
| | - F Geoffrey N Cloke
- School of Life Sciences , Division of Chemistry , University of Sussex , Falmer , Brighton , BN1 9QJ , UK .
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29
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Solowey DP, Kurogi T, Manor BC, Carroll PJ, Mindiola DJ. Metallo-Wittig chemistry of an alkylidene to form a terminal titanium oxo complex. Dalton Trans 2016; 45:15894-15901. [PMID: 27338555 DOI: 10.1039/c6dt01534d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and characterization of a terminal titanium oxo complex generated by alkylidene benzophenone cross-metathesis is reported.
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Affiliation(s)
| | - Takashi Kurogi
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | - Brian C. Manor
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
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30
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Hong J, Li Z, Chen Z, Weng L, Zhou X, Zhang L. Small molecule activation by mixed methyl/methylidene rare earth metal complexes. Dalton Trans 2016; 45:6641-9. [DOI: 10.1039/c6dt00314a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Diverse reactivity patterns of mixed tetramethyl/methylidene rare-earth complexes bearing bulky benzamidinate coligands with PhCN, alkynes, and CS2 have been established and fully characterized.
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Affiliation(s)
- Jianquan Hong
- Department of Chemistry
- Fudan University
- Shanghai 200433
- China
| | - Zhenhua Li
- Department of Chemistry
- Fudan University
- Shanghai 200433
- China
| | - Zhening Chen
- Department of Chemistry
- Fudan University
- Shanghai 200433
- China
| | - Linhong Weng
- Department of Chemistry
- Fudan University
- Shanghai 200433
- China
| | - Xigeng Zhou
- Department of Chemistry
- Fudan University
- Shanghai 200433
- China
| | - Lixin Zhang
- Department of Chemistry
- Fudan University
- Shanghai 200433
- China
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31
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Yousif M, Tjapkes DJ, Lord RL, Groysman S. Catalytic Formation of Asymmetric Carbodiimides at Mononuclear Chromium(II/IV) Bis(alkoxide) Complexes. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00703] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Maryam Yousif
- Department
of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, United States
| | - Daniel J. Tjapkes
- Department
of Chemistry, Grand Valley State University, Allendale, Michigan 49401, United States
| | - Richard L. Lord
- Department
of Chemistry, Grand Valley State University, Allendale, Michigan 49401, United States
| | - Stanislav Groysman
- Department
of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, United States
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32
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Alves LG, Madeira F, Munhá RF, Barroso S, Veiros LF, Martins AM. Reactions of heteroallenes with cyclam-based Zr(IV) complexes. Dalton Trans 2015; 44:1441-55. [PMID: 25427676 DOI: 10.1039/c4dt02851a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work describes reactions of heteroallenes with diamido-diamine cyclam-based Zr(iv) complexes of the general formula (Bn2Cyclam)ZrX2 (X = O(t)Bu, , O(i)Pr, , SPh, , NH(t)Bu, ) as well as the di-orthometallated species ((C6H4CH2)2Cyclam)Zr, . The reactions of isocyanates or isothiocyanates with , or resulted in the formation of N-bonded ureate or thioureate cyclam complexes upon [2 + 2] cycloaddition of the Zr-Namido bonds of the cyclam to the heteroallene (). DFT calculations showed that κ(2)-N,N'-ureate bonding is favoured over κ(2)-N,O-ureates, which in turn may be formed in reactions with bulky isocyanates as 1-naphthyl isocyanate (NpN[double bond, length as m-dash]C[double bond, length as m-dash]O). The reactions of with N,N'-cyclohexylcarbodiimide (CyN[double bond, length as m-dash]C[double bond, length as m-dash]NCy) and carbon disulfide afforded guanidinate and dithiocarbamate fragments, respectively, appended to one of the nitrogen atoms of the cyclam ligand. These reactions represent a reliable method for the synthesis of asymmetrically N-functionalized cyclams giving rise to C1 symmetry Zr(iv) species by addition of one equivalent of heteroallenes. The reaction of (Bn2Cyclam)Zr(NH(t)Bu)2, , with one equivalent of mesityl isocyanate (MesN[double bond, length as m-dash]C[double bond, length as m-dash]O) also proceeds through insertion, involving one Zr-NH(t)Bu bond. However, it was observed that the reaction of (Bn2Cyclam)Zr(NH(t)Bu)2, , with MesN[double bond, length as m-dash]C[double bond, length as m-dash]O follows a different path if the reaction is carried out at 60 °C. In this case the reaction leads to [2 + 2] addition of the Zr-Ncyclam bond to the isocyanate, with a concomitant occurrence of orthometallation of the one benzyl pending group of the cyclam ring. The reaction of (t)BuN[double bond, length as m-dash]C[double bond, length as m-dash]O with the di-orthometallated complex ((C6H4CH2)2Cyclam)Zr, , also gave a κ(2)-N,N'-ureate fragment, by isocyanate addition to the macrocycle. DFT calculations on these systems were conducted in an attempt to rationalise the reactivity patterns observed.
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Affiliation(s)
- Luis G Alves
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal.
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33
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Yao SA, Martin-Diaconescu V, Infante I, Lancaster KM, Götz AW, DeBeer S, Berry JF. Electronic Structure of Ni2E2 Complexes (E = S, Se, Te) and a Global Analysis of M2E2 Compounds: A Case for Quantized E2n– Oxidation Levels with n = 2, 3, or 4. J Am Chem Soc 2015; 137:4993-5011. [DOI: 10.1021/ja511607j] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Shu A. Yao
- Department
of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Vlad Martin-Diaconescu
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, D-45470, Mülheim/Ruhr, Germany
| | - Ivan Infante
- Kimika Fakultatea,
Euskal Herriko Unibertsitatea, and Donostia International Physics
Center (DIPC), P. K. 1072, 20080 Donostia, Euskadi, Spain
| | - Kyle M. Lancaster
- Department
of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Andreas W. Götz
- San
Diego Supercomputer Center, University of California—San Diego, La
Jolla, California 92093, United States
| | - Serena DeBeer
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, D-45470, Mülheim/Ruhr, Germany
- Department
of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - John F. Berry
- Department
of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
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34
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Farrell WS, Zavalij PY, Sita LR. Metal-Catalyzed “On-Demand” Production of Carbonyl Sulfide from Carbon Monoxide and Elemental Sulfur. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201410353] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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35
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Farrell WS, Zavalij PY, Sita LR. Metal-catalyzed "on-demand" production of carbonyl sulfide from carbon monoxide and elemental sulfur. Angew Chem Int Ed Engl 2015; 54:4269-73. [PMID: 25737195 DOI: 10.1002/anie.201410353] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Revised: 12/12/2014] [Indexed: 11/07/2022]
Abstract
The group 6 molybdenum(II) cyclopentadienyl amidinate (CPAM) bis(carbonyl) complex [Cp*Mo{N(iPr)C(Ph)N(iPr)}(CO)2] (Cp*=η(5)-C5Me5) serves as a precatalyst for the high-yielding photocatalytic production of COS from CO and S8 under near-ambient conditions (e.g., 10 psi, 25 °C). Further documented is the isolation and structural characterization of several key transition-metal intermediates which collectively support a novel molybdenum(IV)-based catalytic cycle as being operative. Finally, in the presence of an excess amount of a primary amine, it is demonstrated that this catalytic system can be successfully used for the "on-demand" generation and utilization of COS as a chemical reagent for the synthesis of ureas.
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Affiliation(s)
- Wesley S Farrell
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742 (USA)
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36
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Lee SG, Choi KY, Kim YJ, Park S, Lee SW. Cyclic tetramers of a five-membered palladacycle based on a head-to-tail-linked isocyanate dimer and their reactivity in cyclotrimerization of isocyanates. Dalton Trans 2015; 44:6537-45. [DOI: 10.1039/c5dt00534e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cyclic tetramers of a five-membered palladacycle involving an isocyanate dimer were prepared, and catalytic cyclotrimerization from a palladium zero-compound or a single palladacycle with organic isocyanates was performed.
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Affiliation(s)
- Seon Gye Lee
- Department of Chemistry
- Kangnung-Wonju National University
- Gangneung 210-702
- Republic of Korea
| | - Keun-Young Choi
- Department of Chemistry
- Kangnung-Wonju National University
- Gangneung 210-702
- Republic of Korea
| | - Yong-Joo Kim
- Department of Chemistry
- Kangnung-Wonju National University
- Gangneung 210-702
- Republic of Korea
| | - SuJin Park
- Department of Chemistry
- Sungkyunkwan University
- Suwon 440-746
- Republic of Korea
| | - Soon W. Lee
- Department of Chemistry
- Sungkyunkwan University
- Suwon 440-746
- Republic of Korea
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37
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Sun Z, Wang Q, Xu Y, Wang Z. A computationally designed titanium-mediated amination of allylic alcohols for the synthesis of secondary allylamines. RSC Adv 2015. [DOI: 10.1039/c5ra18503c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A direct amination on allylic alcohols under mild conditions was enlightened by computational investigations and implemented in secondary allylamines synthesis.
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Affiliation(s)
- Zunming Sun
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Qingxia Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Yi Xu
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Zhihong Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- China
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38
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[2 + 2] cycloaddition reactions at terminal imido uranium(IV) complexes to yield isolable cycloadducts. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.07.032] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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39
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Yonke BL, Reeds JP, Fontaine PP, Zavalij PY, Sita LR. Catalytic Production of Isocyanates via Orthogonal Atom and Group Transfers Employing a Shared Formal Group 6 M(II)/M(IV) Redox Cycle. Organometallics 2014. [DOI: 10.1021/om500532s] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Brendan L. Yonke
- Department of Chemistry and
Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Jonathan P. Reeds
- Department of Chemistry and
Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Philip P. Fontaine
- 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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40
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Moulin S, Pellerin O, Toupet L, Paul F. Formation of six-membered palladacycles from phenanthroline Pd(II) bisacetate precursors and phenylisocyanate. CR CHIM 2014. [DOI: 10.1016/j.crci.2013.10.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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41
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Schweizer PD, Wadepohl H, Gade LH. Zirconium and Hafnium Hydrazinediido Half-Sandwich Complexes: Synthesis and Reactivity. Organometallics 2014. [DOI: 10.1021/om500087s] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Peter D. Schweizer
- Anorganisch-Chemisches
Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Hubert Wadepohl
- Anorganisch-Chemisches
Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Lutz H. Gade
- Anorganisch-Chemisches
Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
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42
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Groom LR, Russell AF, Schwarz AD, Mountford P. Reactions of a Cyclopentadienyl–Amidinate Titanium Benzimidamido Complex. Organometallics 2014. [DOI: 10.1021/om4011752] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Laura R. Groom
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Adam F. Russell
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Andrew D. Schwarz
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Philip Mountford
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
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43
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Ren W, Zhou E, Fang B, Zi G, Fang DC, Walter MD. Si–H addition followed by C–H bond activation induced by a terminal thorium imido metallocene: a combined experimental and computational study. Chem Sci 2014. [DOI: 10.1039/c4sc00576g] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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44
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Normand AT, Massard A, Richard P, Canovas C, Balan C, Picquet M, Auffrant A, Le Gendre P. Titanium imido complexes stabilised by bis(iminophosphoranyl)methanide ligands: the influence of N-substituents on solution dynamics and reactivity. Dalton Trans 2014; 43:15098-110. [DOI: 10.1039/c4dt00746h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis, structural study and assessment in catalytic hydroamination of Ti imido complexes with bis(iminophosphoranyl)methanide ligands are reported.
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Affiliation(s)
- Adrien T. Normand
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB) – UMR CNRS 6302
- Université de Bourgogne
- UFR Sciences et Techniques
- BP 47870 21078 Dijon, France
| | - Alexandre Massard
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB) – UMR CNRS 6302
- Université de Bourgogne
- UFR Sciences et Techniques
- BP 47870 21078 Dijon, France
| | - Philippe Richard
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB) – UMR CNRS 6302
- Université de Bourgogne
- UFR Sciences et Techniques
- BP 47870 21078 Dijon, France
| | - Coline Canovas
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB) – UMR CNRS 6302
- Université de Bourgogne
- UFR Sciences et Techniques
- BP 47870 21078 Dijon, France
| | - Cédric Balan
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB) – UMR CNRS 6302
- Université de Bourgogne
- UFR Sciences et Techniques
- BP 47870 21078 Dijon, France
| | - Michel Picquet
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB) – UMR CNRS 6302
- Université de Bourgogne
- UFR Sciences et Techniques
- BP 47870 21078 Dijon, France
| | - Audrey Auffrant
- Laboratoire de Chimie Moléculaire
- École Polytechnique
- UMR CNRS 9168
- 91128 Palaiseau, France
| | - Pierre Le Gendre
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB) – UMR CNRS 6302
- Université de Bourgogne
- UFR Sciences et Techniques
- BP 47870 21078 Dijon, France
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45
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Groom LR, Schwarz AD, Nova A, Clot E, Mountford P. Synthesis and Reactions of a Cyclopentadienyl-Amidinate Titanium tert-Butoxyimido Compound. Organometallics 2013. [DOI: 10.1021/om401008a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Laura R. Groom
- Chemistry Research
Laboratory, Department of
Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Andrew D. Schwarz
- Chemistry Research
Laboratory, Department of
Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Ainara Nova
- Institut
Charles Gerhardt, Université Montpellier 2, CNRS 5253, cc 1501, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
| | - Eric Clot
- Institut
Charles Gerhardt, Université Montpellier 2, CNRS 5253, cc 1501, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
| | - Philip Mountford
- Chemistry Research
Laboratory, Department of
Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
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46
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Sharma B, Callaway TM, Lamb AC, Steren CA, Chen SJ, Xue ZL. Reactions of Group 4 Amide Guanidinates with Dioxygen or Water. Studies of the Formation of Oxo Products. Inorg Chem 2013; 52:11409-21. [DOI: 10.1021/ic4016965] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Bhavna Sharma
- Department
of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Tabitha M. Callaway
- Department
of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Adam C. Lamb
- Department
of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Carlos A. Steren
- Department
of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Shu-Jian Chen
- Department
of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Zi-Ling Xue
- Department
of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996, United States
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47
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Zhizhko PA, Zhizhin AA, Belyakova OA, Zubavichus YV, Kolyagin YG, Zarubin DN, Ustynyuk NA. Oxo/Imido Heterometathesis Reactions Catalyzed by a Silica-Supported Tantalum Imido Complex. Organometallics 2013. [DOI: 10.1021/om4001499] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pavel A. Zhizhko
- A. N. Nesmeyanov Institute of Organoelement
Compounds, Russian Academy of Sciences, Vavilov
str. 28, 119991 Moscow, Russia
| | - Anton A. Zhizhin
- A. N. Nesmeyanov Institute of Organoelement
Compounds, Russian Academy of Sciences, Vavilov
str. 28, 119991 Moscow, Russia
| | - Olga A. Belyakova
- A. N. Nesmeyanov Institute of Organoelement
Compounds, Russian Academy of Sciences, Vavilov
str. 28, 119991 Moscow, Russia
| | - Yan V. Zubavichus
- A. N. Nesmeyanov Institute of Organoelement
Compounds, Russian Academy of Sciences, Vavilov
str. 28, 119991 Moscow, Russia
- National Research Center “Kurchatov Institute”, Acad. Kurchatov
sq. 1, 123182 Moscow, Russia
| | - Yuriy G. Kolyagin
- Chemistry Department, Lomonosov Moscow State University, Leninskie Gory, 1/3, 119991 Moscow,
Russia
| | - Dmitry N. Zarubin
- A. N. Nesmeyanov Institute of Organoelement
Compounds, Russian Academy of Sciences, Vavilov
str. 28, 119991 Moscow, Russia
| | - Nikolai A. Ustynyuk
- A. N. Nesmeyanov Institute of Organoelement
Compounds, Russian Academy of Sciences, Vavilov
str. 28, 119991 Moscow, Russia
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48
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Wu J, Chen Y, Chen Z, Liu W, Li Y, Pei H, Liu Y, Gao Q, Li W. Synthesis, Structures and DFT Studies of Imido-bridged and (Bis)ligand-coordinated Titanium Complexes. Z Anorg Allg Chem 2013. [DOI: 10.1002/zaac.201300100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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49
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Harkness MB, Alvarado E, Badaj AC, Skrela BC, Fan L, Lavoie GG. Coordination and Reactivity Study of Group 4 and 10 Transition Metal Complexes of N-Imidazol-2-ylidene-N′-p-tolylureate and Thioureate Ligands. Organometallics 2013. [DOI: 10.1021/om400220v] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Michael B. Harkness
- Department of Chemistry, York University, 4700 Keele Street, Toronto, Ontario,
M3J 1P3, Canada
| | - Edwin Alvarado
- Department of Chemistry, York University, 4700 Keele Street, Toronto, Ontario,
M3J 1P3, Canada
| | - Anna C. Badaj
- Department of Chemistry, York University, 4700 Keele Street, Toronto, Ontario,
M3J 1P3, Canada
| | - Barbara C. Skrela
- Department of Chemistry, York University, 4700 Keele Street, Toronto, Ontario,
M3J 1P3, Canada
| | - Louie Fan
- Department of Chemistry, York University, 4700 Keele Street, Toronto, Ontario,
M3J 1P3, Canada
| | - Gino G. Lavoie
- Department of Chemistry, York University, 4700 Keele Street, Toronto, Ontario,
M3J 1P3, Canada
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50
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Akagi F, Suzuki S, Ishida Y, Hatanaka T, Matsuo T, Kawaguchi H. Reactions of a Niobium Nitride Complex Prepared from Dinitrogen: Synthesis of Imide and Ureate Complexes and Ammonia Formation. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300172] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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