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Weberg AB, Chaudhuri S, Cheisson T, Uruburo C, Lapsheva E, Pandey P, Gau MR, Carroll PJ, Schatz GC, Schelter EJ. Tantalum, easy as Pi: understanding differences in metal-imido bonding towards improving Ta/Nb separations. Chem Sci 2022; 13:6796-6805. [PMID: 35774165 PMCID: PMC9200122 DOI: 10.1039/d2sc01926d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Accepted: 05/10/2022] [Indexed: 12/04/2022] Open
Abstract
The separation and purification of niobium and tantalum, which co-occur in natural sources, is difficult due to their similar physical and chemical properties. The current industrial method for separating Ta/Nb mixtures uses an energy-intensive process with caustic and toxic conditions. It is of interest to develop alternative, fundamental methodologies for the purification of these technologically important metals that improve upon their environmental impact. Herein, we introduce new Ta/Nb imido compounds: M( t BuN)(TriNOx) (1-M) bound by the TriNOx3- ligand and demonstrate a fundamental, proof-of-concept Ta/Nb separation based on differences in the imido reactivities. Despite the nearly identical structures of 1-M, density functional theory (DFT)-computed electronic structures of 1-M indicate enhanced basic character of the imido group in 1-Ta as compared to 1-Nb. Accordingly, the rate of CO2 insertion into the M[double bond, length as m-dash]Nimido bond of 1-Ta to form a carbamate complex (2-Ta) was selective compared to the analogous, unobserved reaction with 1-Nb. Differences in solubility between the imido and carbamate complexes allowed for separation of the carbamate complex, and led to an efficient Ta/Nb separation (S Ta/Nb = 404 ± 150) dependent on the kinetic differences in nucleophilicities between the imido moieties in 1-Ta and 1-Nb.
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Affiliation(s)
- Alexander B Weberg
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 S. 34th St. Philadelphia PA 19104 USA
| | - Subhajyoti Chaudhuri
- Department of Chemistry, Northwestern University 2145 Sheridan Rd. Evanston IL 60208 USA
| | - Thibault Cheisson
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 S. 34th St. Philadelphia PA 19104 USA
| | - Christian Uruburo
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 S. 34th St. Philadelphia PA 19104 USA
| | - Ekaterina Lapsheva
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 S. 34th St. Philadelphia PA 19104 USA
| | - Pragati Pandey
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 S. 34th St. Philadelphia PA 19104 USA
| | - Michael R Gau
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 S. 34th St. Philadelphia PA 19104 USA
| | - Patrick J Carroll
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 S. 34th St. Philadelphia PA 19104 USA
| | - George C Schatz
- Department of Chemistry, Northwestern University 2145 Sheridan Rd. Evanston IL 60208 USA
| | - Eric J Schelter
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 S. 34th St. Philadelphia PA 19104 USA
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3
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Zhuo Q, Yang J, Mo Z, Zhou X, Shima T, Luo Y, Hou Z. Dinitrogen Cleavage and Functionalization with Carbon Dioxide in a Dititanium Dihydride Framework. J Am Chem Soc 2022; 144:6972-6980. [PMID: 35380823 DOI: 10.1021/jacs.2c01851] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The activation and functionalization of dinitrogen (N2) with carbon dioxide (CO2) are of great interest and importance but highly challenging. We report here for the first time the reaction of N2 with CO2 in a dititanium dihydride framework, which leads to N-C bond formation and N-N and C-O bond cleavage. Exposure of a dinitrogen dititanium hydride complex {[(acriPNP)Ti]2(μ2-η1:η2-N2)(μ2-H)2} (1) (acriPNP = 4,5-bis(diisopropylphosphino)-2,7,9,9-tetramethyl-9H-acridin-10-ide) to a CO2 atmosphere at room temperature rapidly yielded a nitrido/N,N-dicarboxylamido complex {[(acriPNP)Ti]2(μ2-N)[μ2-N(CO2)2]} (2, 28%) and a diisocyanato/dioxo complex {[(acriPNP)Ti]2(NCO)2(μ2-O)2} (3, 52%) with release of H2. When the reaction of 1 with CO2 (1 atm) was carried out at -50 °C, complex 2 was selectively formed in 82% yield within 5 min. Heating 2 at 80 °C under 1 atm CO2 for 30 min afforded 3 in 67% yield. When 1 was allowed to react with 1.5 equiv of CO2 at room temperature, an isocyanato/nitrido/oxo complex {[(acriPNP)Ti]2(NCO)(μ2-N)(μ2-O)} (4) was exclusively formed in 89% yield within 5 min. The reaction of 4 with CO2 at room temperature almost quantitatively yielded the dioxo/diisocyanato complex 3 within 5 min. The mechanistic details were clarified by the 15N- and 13C-labeled experiments and density functional theory (DFT) calculations, providing unprecedented insights into the reaction of N2 with CO2. A titanium-mediated cycle for the synthesis of trimethylsilyl isocyanate Me3SiNCO from N2, CO2, and Me3SiCl using H2 as a reducing agent was also established.
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Affiliation(s)
- Qingde Zhuo
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Jimin Yang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Zhenbo Mo
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Xiaoxi Zhou
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Takanori Shima
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yi Luo
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.,PetroChina Petrochemical Research Institute, Beijing 102206, China
| | - Zhaomin Hou
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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4
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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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5
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Suresh L, Finnstad J, Törnroos KW, Le Roux E. Bis(phenolate)-functionalized N-heterocyclic carbene complexes of oxo- and imido-vanadium(V). Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2021.120301] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Hsieh HH, Tu MH, Su YC, Ko BT, Datta A, Zeng YF, Hu CH, Huang JH. Synthesis, structural and DFT interpretation of titanium bis-isopropoxide derivatives incorporating bidentate ketiminate ligands. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2020.120127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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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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8
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Aguilar-Calderón JR, Murillo J, Gomez-Torres A, Saucedo C, Jordan A, Metta-Magaña AJ, Pink M, Fortier S. Redox Character and Small Molecule Reactivity of a Masked Titanium(II) Synthon. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00637] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- J. Rolando Aguilar-Calderón
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Jesse Murillo
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Alejandra Gomez-Torres
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Carlos Saucedo
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Aldo Jordan
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Alejandro J. Metta-Magaña
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Maren Pink
- Indiana University Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, United States
| | - Skye Fortier
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
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9
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Grant LN, Mindiola DJ. The Rise of Phosphaethynolate Chemistry in Early Transition Metals, Actinides, and Rare‐Earth Complexes. Chemistry 2019; 25:16171-16178. [DOI: 10.1002/chem.201902871] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Indexed: 11/10/2022]
Affiliation(s)
- Lauren N. Grant
- Department of Chemistry University of Pennsylvania Philadelphia PA 19104 USA
| | - Daniel J. Mindiola
- Department of Chemistry University of Pennsylvania Philadelphia PA 19104 USA
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10
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Ziółkowska A, Szynkiewicz N, Ponikiewski Ł. Molecular Structures of the Phospha-Wittig Reaction Intermediate: Initial Step in the Synthesis of Compounds with a C═P–P Bond as Products in the Phospha-Wittig Reaction. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00192] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Aleksandra Ziółkowska
- Department of Inorganic Chemistry, Chemical Faculty, Gdansk University of Technology, 11/12 Gabriela Narutowicza Str, 80-233 Gdansk, Poland
| | - Natalia Szynkiewicz
- Department of Inorganic Chemistry, Chemical Faculty, Gdansk University of Technology, 11/12 Gabriela Narutowicza Str, 80-233 Gdansk, Poland
| | - Łukasz Ponikiewski
- Department of Inorganic Chemistry, Chemical Faculty, Gdansk University of Technology, 11/12 Gabriela Narutowicza Str, 80-233 Gdansk, Poland
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11
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Hsiao CM, Chen YF, Lin CH, Hu CH, Cai YR, Huang JH. Catalytic amination of benzyl alcohol using ruthenium cymene compounds containing bidentate N,O-donor ancillary ligands. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.02.029] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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12
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Chu T, Vyboishchikov SF, Gabidullin BM, Nikonov GI. Oxidative Cleavage of the C═N Bond on Al(I). J Am Chem Soc 2017; 139:8804-8807. [DOI: 10.1021/jacs.7b04841] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Terry Chu
- Department
of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario Canada L2S 3A1
| | - Sergei F. Vyboishchikov
- Institut
de Química Computacional i Catàlisi and Departament
de Química, Universitat de Girona, Carrer Maria Aurèlia Capmany
69, 17003 Girona, Spain
| | - Bulat M. Gabidullin
- X-Ray
Core Facility, Faculty of Science, University of Ottawa, 150 Louis
Pasteur, Ottawa, Ontario, Canada K1N 6N5
| | - Georgii I. Nikonov
- Department
of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario Canada L2S 3A1
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13
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Backbone-Substituted β-Ketoimines and Ketoiminate Clusters: Transoid Li2O2 Squares and D2-Symmetric Li4O4 Cubanes. Synthesis, Crystallography and DFT Calculations. INORGANICS 2017. [DOI: 10.3390/inorganics5020030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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14
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Grant LN, Pinter B, Kurogi T, Carroll ME, Wu G, Manor BC, Carroll PJ, Mindiola DJ. Molecular titanium nitrides: nucleophiles unleashed. Chem Sci 2017; 8:1209-1224. [PMID: 28451262 PMCID: PMC5369542 DOI: 10.1039/c6sc03422e] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 09/19/2016] [Indexed: 12/30/2022] Open
Abstract
In this contribution we present reactivity studies of a rare example of a titanium salt, in the form of [μ2-K(OEt2)]2[(PN)2Ti[triple bond, length as m-dash]N]2 (1) (PN- = N-(2-(diisopropylphosphino)-4-methylphenyl)-2,4,6-trimethylanilide) to produce a series of imide moieties including rare examples such as methylimido, borylimido, phosphonylimido, and a parent imido. For the latter, using various weak acids allowed us to narrow the pK a range of the NH group in (PN)2Ti[triple bond, length as m-dash]NH to be between 26-36. Complex 1 could be produced by a reductively promoted elimination of N2 from the azide precursor (PN)2TiN3, whereas reductive splitting of N2 could not be achieved using the complex (PN)2Ti[double bond, length as m-dash]N[double bond, length as m-dash]N[double bond, length as m-dash]Ti(PN)2 (2) and a strong reductant. Complete N-atom transfer reactions could also be observed when 1 was treated with ClC(O)tBu and OCCPh2 to form NCtBu and KNCCPh2, respectively, along with the terminal oxo complex (PN)2Ti[triple bond, length as m-dash]O, which was also characterized. A combination of solid state 15N NMR (MAS) and theoretical studies allowed us to understand the shielding effect of the counter cation in dimer 1, the monomer [K(18-crown-6)][(PN)2Ti[triple bond, length as m-dash]N], and the discrete salt [K(2,2,2-Kryptofix)][(PN)2Ti[triple bond, length as m-dash]N] as well as the origin of the highly downfield 15N NMR resonance when shifting from dimer to monomer to a terminal nitride (discrete salt). The upfield shift of 15Nnitride resonance in the 15N NMR spectrum was found to be linked to the K+ induced electronic structural change of the titanium-nitride functionality by using a combination of MO analysis and quantum chemical analysis of the corresponding shielding tensors.
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Affiliation(s)
- Lauren N Grant
- Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , PA 19104 , USA .
| | - Balazs Pinter
- Eenheid Algemene Chemie (ALGC) , Vrije Universiteit Brussel (VUB) , Pleinlaan 2 , 1050 , Brussels , Belgium
| | - Takashi Kurogi
- Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , PA 19104 , USA .
| | - Maria E Carroll
- Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , PA 19104 , USA .
| | - Gang Wu
- Department of Chemistry , Queen's University , Kingston , Ontario , Canada K7L 3N6
| | - Brian C Manor
- Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , PA 19104 , USA .
| | - Patrick J Carroll
- Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , PA 19104 , USA .
| | - Daniel J Mindiola
- Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , PA 19104 , USA .
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15
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Chu T, Vyboishchikov SF, Gabidullin B, Nikonov GI. Oxidative Cleavage of C=S and P=S Bonds at an AlI
Center: Preparation of Terminally Bound Aluminum Sulfides. Angew Chem Int Ed Engl 2016; 55:13306-13311. [DOI: 10.1002/anie.201607735] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Terry Chu
- Department of Chemistry; Brock University; 1812 Sir Isaac Brock Way St. Catharines Ontario L2S 3A1 Canada
| | - Sergei F. Vyboishchikov
- Institut de Química Computacional i Catàlisi and Departament de Química; Carrer Maria Aurèlia Capmany 69 17003 Girona Spain
| | - Bulat Gabidullin
- X-Ray Core Facility; Faculty of Science; University of Ottawa; 150 Louis Pasteur Ottawa Ontario K1N 6N5 Canada
| | - Georgii I. Nikonov
- Department of Chemistry; Brock University; 1812 Sir Isaac Brock Way St. Catharines Ontario L2S 3A1 Canada
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16
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Chu T, Vyboishchikov SF, Gabidullin B, Nikonov GI. Oxidative Cleavage of C=S and P=S Bonds at an AlI
Center: Preparation of Terminally Bound Aluminum Sulfides. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607735] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Terry Chu
- Department of Chemistry; Brock University; 1812 Sir Isaac Brock Way St. Catharines Ontario L2S 3A1 Canada
| | - Sergei F. Vyboishchikov
- Institut de Química Computacional i Catàlisi and Departament de Química; Carrer Maria Aurèlia Capmany 69 17003 Girona Spain
| | - Bulat Gabidullin
- X-Ray Core Facility; Faculty of Science; University of Ottawa; 150 Louis Pasteur Ottawa Ontario K1N 6N5 Canada
| | - Georgii I. Nikonov
- Department of Chemistry; Brock University; 1812 Sir Isaac Brock Way St. Catharines Ontario L2S 3A1 Canada
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Kim H, Choi SH, Ahn D, Kim Y, Ryu JY, Lee J, Kim Y. Facile synthesis of a dimeric titanium(iv) complex with terminal TiO moieties and its application as a catalyst for the cycloaddition reaction of CO2to epoxides. RSC Adv 2016. [DOI: 10.1039/c6ra23255h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Dimeric terminal oxo-titanium complex1having no TiO→Ti bonds could be easily synthesized. The titanium complexes1and2could act as catalysts for cycloaddition between CO2and epoxides in the presence of cocatalysts.
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Affiliation(s)
- Hyejin Kim
- Department of Chemistry
- BK21+ Program Research Team
- Chungbuk National University
- Cheongju
- Republic of Korea
| | - Sung Ho Choi
- Department of Chemistry
- BK21+ Program Research Team
- Chungbuk National University
- Cheongju
- Republic of Korea
| | - Duseong Ahn
- Department of Chemistry
- BK21+ Program Research Team
- Chungbuk National University
- Cheongju
- Republic of Korea
| | - Yoseph Kim
- Department of Chemistry
- BK21+ Program Research Team
- Chungbuk National University
- Cheongju
- Republic of Korea
| | - Ji Yeon Ryu
- Department of Chemistry
- Chonnam National University
- Gwangju 61186
- Republic of Korea
| | - Junseong Lee
- Department of Chemistry
- Chonnam National University
- Gwangju 61186
- Republic of Korea
| | - Youngjo Kim
- Department of Chemistry
- BK21+ Program Research Team
- Chungbuk National University
- Cheongju
- Republic of Korea
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18
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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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19
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Chen YC, Chiu WT, Hu TJ, Lin CH, Huang JH. Synthesis and Characterization of Metal Complexes (M = Al, Ti, W, Zn) Containing Pyrrole-imine Ligands. J CHIN CHEM SOC-TAIP 2014. [DOI: 10.1002/jccs.201400138] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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20
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Bungu PSE, Schutte M, Steyl G. Bis[4-(4-bromophenylimino-κN)pent-2-en-2-olato-κO]copper(II). Acta Crystallogr Sect E Struct Rep Online 2012; 68:m1373. [PMID: 23284352 PMCID: PMC3515125 DOI: 10.1107/s1600536812042420] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Accepted: 10/10/2012] [Indexed: 11/10/2022]
Abstract
In the title compound, [Cu(C(11)H(11)BrNO)(2)], the Cu(II) atom is in a distorted square-planar geometry, with the two bidentate ketimine ligands positioned in a trans geometry. Two inter-molecular C-H⋯O hydrogen bond inter-actions are present which link the mol-ecules in a zigzag manner along the a axis. The mol-ecules pack in layers along the diagonal of the bc plane.
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Affiliation(s)
- Paul S E Bungu
- Department of Chemistry, University of the Free State, PO Box 339, Nelson Mandela Drive, Bloemfontein 9301, South Africa
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21
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Anderson JC, Moreno RB. Synthesis of ureas from titanium imido complexes using CO2 as a C-1 reagent at ambient temperature and pressure. Org Biomol Chem 2012; 10:1334-8. [PMID: 22159187 DOI: 10.1039/c1ob06576a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The coordinatively unsaturated 12-electron complex dichloro t-butylimido bispyridine titanium(IV) (2a) has been shown to react with CO(2) to give N,N-bis-t-butyl urea. Two analogous sterically hindered coordinatively saturated 14-electron complexes dichloro t-butylimido trispyridine titanium(IV) (10a) and dichloro 2,6-(i-Pr)(2)phenylimido trispyridine titanium(IV) (10b) also gave their corresponding symmetrical ureas upon treatment with CO(2). Further experiments support the intermediary of metallocycles formed from heterocumulene metathesis reactions. The unsymmetrical urea N-benzyl, N-t-butyl urea (11) was produced from treatment of 2,6-(i-Pr)(2)phenylimido trispyridine titanium(IV) (10b) with CO(2) and interception with BnNH(2). Equimolar quantities of N,N-bistrimethylsilybenzylamine or N,N-bistrimethylsilyphenethylamine were shown to promote the reaction between t-butylimido bispyridine titanium(IV) (2a) and CO(2) to give near quantitative yields of symmetrical urea. Other symmetrical ureas could be produced from TiCl(4), amine and CO(2) in moderate to quantitative yields depending on the stoichiometry of amine present.
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Affiliation(s)
- James C Anderson
- Department of Chemistry, University College London, 20 Gordon Street, London, UK WC1H 0AJ.
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Gong Y, Andrews L, Bauschlicher CW, Thanthiriwatte KS, Dixon DA. Infrared spectroscopic and theoretical studies of the OTiF2, OZrF2 and OHfF2 molecules with terminal oxo ligands. Dalton Trans 2012; 41:11706-15. [DOI: 10.1039/c2dt31223a] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Nguyen VH, Vendier L, Etienne M, Despagnet-Ayoub E, Breuil PAR, Magna L, Proriol D, Olivier-Bourbigou H, Lorber C. Titanium-Imido Complexes with Pendant Groups - Synthesis, Characterization, and Evaluation of Their Role as Precatalysts for Ethylene Polymerization. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201101005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Pastrán J, Ramírez A, Agrifoglio G, Linden A, Dorta R. (Z)-4-(2,5-Di-tert-butyl-anilino)pent-3-en-2-one. Acta Crystallogr Sect E Struct Rep Online 2011; 67:o1405-6. [PMID: 21754790 PMCID: PMC3120447 DOI: 10.1107/s1600536811017296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2011] [Accepted: 05/07/2011] [Indexed: 11/10/2022]
Abstract
In the crystal structure of the title ketoamine, C19H29NO, the bond lengths from the N atom through the alkene group to the ketone O atom show the presence of an extensively delocalized π-system. The dihedral angle between the plane of the phenyl ring and that of the alkene component is 63.45 (7)° due to steric hindrance exerted by the tert-butyl groups. The molecule has a Z-configured alkene function, which is facilitated by an intramolecular N—H⋯O hydrogen bond between the amine and ketone groups. The molecules are linked into extended chains, which run parallel to the [010] direction, by a very weak C—H⋯O interaction between the methyl substituent of the alkene group and the ketone O atom of a neighbouring molecule.
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Khosla C, Jackson AB, White PS, Templeton JL. Synthesis and isocyanate insertion reactions of tungsten(IV) imido complexes formed from W(CO)(acac)(N3)(PMe3)3 with azide as the oxidant. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2010.10.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Pastrán J, Ineichen E, Agrifoglio G, Linden A, Dorta R. (E)-3-(1-Naphthyl-amino)-methyl-ene-(+)-camphor. Acta Crystallogr Sect E Struct Rep Online 2010; 67:o188-9. [PMID: 21522692 PMCID: PMC3050145 DOI: 10.1107/s1600536810052487] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2010] [Accepted: 12/14/2010] [Indexed: 11/25/2022]
Abstract
In the crystal structure of the title ketoamine {systematic name: (E)-1,7,7-trimethyl-3-[(1-naphthylamino)methylidene]bicyclo[2.2.1]heptan-2-one}, C21H23NO, there are two independent molecules in the asymmetric unit. Both molecules have an E configuration about the alkene function. The main conformational difference between the molecules is in the orientation of the plane of the naphthyl rings with respect to the camphor fragment. The torsion angle about the enamine C—N bond is 21.3 (7)° for molecule A, but −24.4 (8)° for molecule B. Intermolecular N—H⋯O hydrogen bonds between the amino and ketone groups of adjacent independent molecules sustain the crystal, and the resulting extended chains, containing an alternating sequence of the two independent molecules, run parallel to the [001] direction and can be described by a graph-set motif of C22(12).
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Anderson JC, Bou-Moreno R. The efficient synthesis of carbodiimides using a titanium imido complex. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.09.073] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Oguadinma PO, Schaper F. Bis(2-phenylethyl)-nacnac: A Chiral Diketiminate Ligand and Its Copper Complexes. Organometallics 2009. [DOI: 10.1021/om9002279] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Paul O. Oguadinma
- Département de Chimie, Université de Montréal, Montréal, Québec, H3C 3J7, Canada
| | - Frank Schaper
- Département de Chimie, Université de Montréal, Montréal, Québec, H3C 3J7, Canada
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29
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Lee JI, Lee TY, Chang LC, Lin CY, Lee HM, Hung L, Datta A, Huang JH. Iron and vanadium complexes bearing bidentate ketiminate ligand: Synthesis, structural characterization and catalytic activity for MMA polymerization. J Mol Struct 2009. [DOI: 10.1016/j.molstruc.2009.04.036] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Hayton TW, Wu G. Exploring the effects of reduction or Lewis acid coordination on the U=O bond of the uranyl moiety. Inorg Chem 2009; 48:3065-72. [PMID: 19265410 DOI: 10.1021/ic802360y] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reaction of Li(ArNC(Ph)CHC(Ph)O) ((Ar)acnac; Ar = 2,4,6-Me(3)C(6)H(2)) or Na(ArNC(Ph)CHC(Ph)O) (Ar = 3,5-(t)Bu(2)C(6)H(3)) with 0.5 equiv of UO(2)Cl(2)(THF)(3) results in the formation of UO(2)((Ar)acnac)(2) (Ar = 2,4,6-Me(3)C(6)H(2), 1; 3,5-(t)Bu(2)C(6)H(3), 2), which were isolated as orange crystalline solids in good yields. The structure of 2 has been confirmed by X-ray crystallography, while the solution redox properties of 1 and 2 have been measured by cyclic voltammetry. Complex 1 exhibits a reversible reduction feature at E(1/2) = -1.52 V (vs Fc/Fc(+)), while complex 2 exhibits a reduction feature at -1.35 V (vs Fc/Fc(+)). Complexes 1 and 2 react with Cp*(2)Co to generate [Cp*(2)Co][UO(2)((Ar)acnac)(2)] (Ar = 2,4,6-Me(3)C(6)H(2), 3; 3,5-(t)Bu(2)C(6)H(3), 4), in moderate to good yields. Both 3 and 4 have been fully characterized, while the structure of 4 has also been determined by X-ray crystallography. Reaction of 2 with 2 equiv of B(C(6)F(5))(3) in CH(2)Cl(2) leads to the isolation of UO(OB{C(6)F(5)}(3))((Ar)acnac)(2) (Ar = 3,5-(t)Bu(2)C(6)H(3)) (5). Complex 5, generated in situ, exhibits an irreversible reduction at -0.78 V (vs Fc/Fc(+), 100 mV/s scan rate) which is considerably lower than the reduction potential observed for 2, consistent with the removal of electron density from the uranyl moiety by coordination of B(C(6)F(5))(3).
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Affiliation(s)
- Trevor W Hayton
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, USA.
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Guiducci AE, Boyd CL, Clot E, Mountford P. Reactions of cyclopentadienyl-amidinate titanium imido compounds with CO2: cycloaddition-extrusion vs. cycloaddition-insertion. Dalton Trans 2009:5960-79. [DOI: 10.1039/b901774g] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Peng H, Zhang Z, Qi R, Yao Y, Zhang Y, Shen Q, Cheng Y. Synthesis, Reactivity, and Characterization of Sodium and Rare-Earth Metal Complexes Bearing a Dianionic N-Aryloxo-Functionalized β-Ketoiminate Ligand. Inorg Chem 2008; 47:9828-35. [DOI: 10.1021/ic8011469] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hongmei Peng
- Key Laboratory of Organic Synthesis of Jiangsu Province, Department of Chemistry and Chemical Engineering, Dushu Lake Campus, Suzhou University, Suzhou 215123, People’s Republic of China, and State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
| | - Zhenqin Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province, Department of Chemistry and Chemical Engineering, Dushu Lake Campus, Suzhou University, Suzhou 215123, People’s Republic of China, and State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
| | - Ruipeng Qi
- Key Laboratory of Organic Synthesis of Jiangsu Province, Department of Chemistry and Chemical Engineering, Dushu Lake Campus, Suzhou University, Suzhou 215123, People’s Republic of China, and State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
| | - Yingming Yao
- Key Laboratory of Organic Synthesis of Jiangsu Province, Department of Chemistry and Chemical Engineering, Dushu Lake Campus, Suzhou University, Suzhou 215123, People’s Republic of China, and State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
| | - Yong Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province, Department of Chemistry and Chemical Engineering, Dushu Lake Campus, Suzhou University, Suzhou 215123, People’s Republic of China, and State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
| | - Qi Shen
- Key Laboratory of Organic Synthesis of Jiangsu Province, Department of Chemistry and Chemical Engineering, Dushu Lake Campus, Suzhou University, Suzhou 215123, People’s Republic of China, and State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
| | - Yanxiang Cheng
- Key Laboratory of Organic Synthesis of Jiangsu Province, Department of Chemistry and Chemical Engineering, Dushu Lake Campus, Suzhou University, Suzhou 215123, People’s Republic of China, and State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
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Synthesis and structures of three, four, and six-coordinate monomeric tin(II) and tin(IV) compounds containing η2-ketiminate ligands. Inorganica Chim Acta 2008. [DOI: 10.1016/j.ica.2008.02.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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34
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Spencer LP, Yang P, Scott BL, Batista ER, Boncella JM. Imido exchange in bis(imido) uranium(VI) complexes with aryl isocyanates. J Am Chem Soc 2008; 130:2930-1. [PMID: 18271590 DOI: 10.1021/ja7107454] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Liam P Spencer
- Materials, Physics and Applications Division, Los Alamos National Laboratory, MS J514, Los Alamos New Mexico 87545, USA
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Fout AR, Kilgore UJ, Mindiola DJ. The progression of synthetic strategies to assemble titanium complexes bearing the terminal imide group. Chemistry 2008; 13:9428-40. [PMID: 17907126 DOI: 10.1002/chem.200701064] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The synthesis of terminal titanium imides is described in this account. The incorporation of this functional group has evolved from more simplistic approaches to more complex or unusual methods. Past and current synthetic strategies to incorporate the terminal imide functionality are explained with particular emphasis on low-coordinate titanium environments bearing this ubiquitous but vital type of motif. More recently, the imide functionality has demonstrated to be a key intermediate for modeling important industrial processes such as the hydrodenitrogenation of crude oil.
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Affiliation(s)
- Alison R Fout
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, IN 47405, USA
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Baiz TI, Schmidt JAR. A Discrete Ortho-Lithiated Acetophenone Imine Derivative: Isolation, Characterization, and Synthesis of Group IV Metal Complexes. Organometallics 2007. [DOI: 10.1021/om700530z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tamam I. Baiz
- Department of Chemistry, The University of Toledo, 2801 West Bancroft Street, MS 602, Toledo, Ohio 43606-3390
| | - Joseph A. R. Schmidt
- Department of Chemistry, The University of Toledo, 2801 West Bancroft Street, MS 602, Toledo, Ohio 43606-3390
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Four- and five-coordinate magnesium compounds containing ketiminate ligands. Synthesis and characterization of L2Mg, L2Mg(LH), and L2Mg(Py), where L=MeC(O)CHC(NAr)Me. J Organomet Chem 2007. [DOI: 10.1016/j.jorganchem.2006.11.015] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Lorber C, Choukroun R, Vendier L. A General and Facile One-Step Synthesis of Imido–Titanium(IV) Complexes: Application to the Synthesis of Compounds Containing Functionalized or Chiral Imido Ligands and Bimetallic Diimido Architectures. Eur J Inorg Chem 2006. [DOI: 10.1002/ejic.200600475] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Dunn SC, Hazari N, Cowley AR, Green JC, Mountford P. Synthesis and Reactions of Group 4 Imido Complexes Supported by Cyclooctatetraene Ligands. Organometallics 2006. [DOI: 10.1021/om0510526] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Simon C. Dunn
- Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
| | - Nilay Hazari
- Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
| | - Andrew R. Cowley
- Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
| | - Jennifer C. Green
- Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
| | - Philip Mountford
- Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
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Guiducci AE, Boyd CL, Mountford P. Reactions of Cyclopentadienyl-Amidinate Titanium Imido Compounds with CS2, COS, Isocyanates, and Other Unsaturated Organic Compounds. Organometallics 2006. [DOI: 10.1021/om050784v] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aldo E. Guiducci
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Catherine L. Boyd
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Philip Mountford
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
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