1
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Penki VSS, Chu YT, Chen HY, Sudewi S, Li CH, Huang GG, Hsu SCN. Steric and electronic influence on Cu-Cu short contacts in β-thioketiminato tricopper(I) clusters. Dalton Trans 2024. [PMID: 39045681 DOI: 10.1039/d4dt01549e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2024]
Abstract
A series of β-thioketiminate copper(I) complex trimers [LCuI]3 were synthesized by modifying the ligand framework with electron-withdrawing groups (F and Cl) or electron-donating groups (iPr and Me) at the N-aryl ring as well as with CF3 groups on the chelating backbone. This ligand modification significantly impacts the enhancement of Cu⋯Cu short contacts, which can be rationalized by using steric and electronic factors of the chelated ligand. We observed that this intramolecular cuprophilicity among [LCuI]3 complexes is primarily governed by the size of N-aryl ortho-substituents. These findings were well supported by X-ray crystallography, Raman spectroscopy, and Mayer bond order analysis. The electronic effects induced by the ligand modification on the LCuI fragment were investigated using CO and 2,4,6-CNC6H2Me3 as probe molecules. Corroborated by the FTIR and CV measurements, our results reveal that the β-thioketiminate SN chelators induce more pronounced changes in the electronic character of the LCuI fragment due to the presence of CF3 groups on the chelating backbone in comparison with the F or Cl substituents on the N-aryl ring.
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Affiliation(s)
| | - Yu-Ting Chu
- International PhD Program for Science, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
| | - Hsing-Yin Chen
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
| | - Sri Sudewi
- Department of Pharmacy, Faculty of Mathematic and Natural Science, Universitas Sam Ratulangi, Manado 95115, Indonesia
| | - Chien-Hung Li
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
| | - Genin Gary Huang
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
| | - Sodio C N Hsu
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan
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2
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Nikseresht A, Ghoochi F, Mohammadi M. Postsynthetic Modification of Amine-Functionalized MIL-101(Cr) Metal-Organic Frameworks with an EDTA-Zn(II) Complex as an Effective Heterogeneous Catalyst for Hantzsch Synthesis of Polyhydroquinolines. ACS OMEGA 2024; 9:28114-28128. [PMID: 38973916 PMCID: PMC11223138 DOI: 10.1021/acsomega.4c01117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Revised: 05/30/2024] [Accepted: 06/07/2024] [Indexed: 07/09/2024]
Abstract
The present work aims at preparing the EDTA-Zn(II) complex-supported on the amine-functionalized MIL-101(Cr) MOF-as a new and effective heterogenized catalyst. The optimization of the hydrothermal process shows that 120 °C is the best condition to grow the MIL-101(Cr)-NH2 MOF crystals. Moreover, regarding the use of the postsynthetic modification (PSM) method, hexadentate EDTA was grafted on this support via a simple aminolysis process before further coordinating it with Zn ions to create the corresponding Zn(II) catalytic complex. The catalytic activity of this compound was then investigated in the context of a one-pot synthesis of polyhydroquinolines. This approach has a number of advantages including the following: the use of a solvent that is not hazardous, applying a porous catalyst that is inexpensive, secure, and recyclable; rapid reaction times, high levels of efficiency, and the simplicity of MOF catalyst separation. Accordingly, the process in question can be given the label of "green chemistry".
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Affiliation(s)
- Ahmad Nikseresht
- Department
of Chemistry, Payame Noor University, 19395-4697 Tehran, Iran
| | - Fatemeh Ghoochi
- Department
of Chemistry, Payame Noor University, 19395-4697 Tehran, Iran
| | - Masoud Mohammadi
- Department
of Chemistry, Faculty of Science, Ilam University, 69315-516 Ilam, Iran
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3
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Asundi AS, Noonikara-Poyil A, Phan VQH, Dias HVR, Sarangi R. Understanding Copper(I)-Ethylene Bonding Using Cu K-Edge X-ray Absorption Spectroscopy. Inorg Chem 2023; 62:19298-19311. [PMID: 37963391 DOI: 10.1021/acs.inorgchem.3c02904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
Copper plays many important roles in ethylene chemistry, thus generating significant interest in understanding the structures, bonding, and properties of copper(I)-ethylene complexes. In this work, the ethylene binding characteristics of a series of isolable Cu(I)-ethylene compounds supported by a systematic set of fluorinated and nonfluorinated bis- and tris(pyrazolyl)borate and the related bis(pyrazolyl)methane ligands have been investigated. Through a combination of X-ray absorption spectroscopy and quantum chemical calculations, we characterize their geometric and electronic structures and the role that fluorinated ligands play in lowering the electron density at Cu sites. Such ligands increase the ethylene-to-Cu σ-donor interaction and, correspondingly, decrease the Cu-to-ethylene π back-bonding. This latter interaction leads to a partial vacancy in the Cu 3d level, which manifests experimentally as a low-energy feature in the Cu K pre-edge, allowing for its direct observation and comparison within a series of Cu(I) compounds. The pre-edge feature is reproduced by TD-DFT calculations, and its energy position and total intensity are used to quantitatively probe Cu-ethylene bonding. The variations in the Cu electronic structure influence the stability and overall ethylene bonding strength of these compounds, ultimately showing how substituents on the supporting ligands have a notable effect on their physical and chemical properties.
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Affiliation(s)
- Arun S Asundi
- SSRL, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Anurag Noonikara-Poyil
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, United States
| | - Vo Quang Huy Phan
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, United States
| | - H V Rasika Dias
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, United States
| | - Ritimukta Sarangi
- SSRL, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
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4
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Mehara J, Watson BT, Noonikara-Poyil A, Zacharias AO, Roithová J, Rasika Dias HV. Binding Interactions in Copper, Silver and Gold π-Complexes. Chemistry 2022; 28:e202103984. [PMID: 35076112 PMCID: PMC9305286 DOI: 10.1002/chem.202103984] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Indexed: 12/14/2022]
Abstract
The copper(I), silver(I), and gold(I) metals bind π‐ligands by σ‐bonding and π‐back bonding interactions. These interactions were investigated using bidentate ancillary ligands with electron donating and withdrawing substituents. The π‐ligands span from ethylene to larger terminal and internal alkenes and alkynes. Results of X‐ray crystallography, NMR, and IR spectroscopy and gas phase experiments show that the binding energies increase in the order Ag<Cu<Au and the binding energies are slightly higher for alkynes than for alkenes. Modulation of the electron density at the metal using substituents on the ancillary ligands shows that the π‐back bonding interaction plays a dominant role for the binding in the copper and gold complexes.
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Affiliation(s)
- Jaya Mehara
- Department of Spectroscopy and Catalysis, Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ, Nijmegen (The, Netherlands
| | - Brandon T Watson
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas, 76019, USA
| | - Anurag Noonikara-Poyil
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas, 76019, USA
| | - Adway O Zacharias
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas, 76019, USA
| | - Jana Roithová
- Department of Spectroscopy and Catalysis, Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ, Nijmegen (The, Netherlands
| | - H V Rasika Dias
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas, 76019, USA
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5
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Noonikara-Poyil A, Muñoz-Castro A, Boretskyi A, Mykhailiuk PK, Dias HVR. When SF 5 outplays CF 3: effects of pentafluorosulfanyl decorated scorpionates on copper. Chem Sci 2021; 12:14618-14623. [PMID: 34881014 PMCID: PMC8580053 DOI: 10.1039/d1sc04846e] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 10/15/2021] [Indexed: 01/01/2023] Open
Abstract
Polyfluorinated, electron-withdrawing, and sterically demanding supporting ligands are of significant value in chemistry. Here we report the assembly and use of a bis(pyrazolyl)borate, [Ph2B(3-(SF5)Pz)2]- that combines all such features, and involves underutilized pentafluorosulfanyl substituents. The ethylene and carbonyl chemistry of copper(i) supported by [Ph2B(3-(SF5)Pz)2]-, a comparison to the trifluoromethylated counterparts involving [Ph2B(3-(CF3)Pz)2]-, as well as copper catalyzed cyclopropanation of styrene with ethyl diazoacetate and CF3CHN2 are presented. The results from cyclopropanation show that SF5 groups dramatically improved the yields and stereoselectivity compared to the CF3.
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Affiliation(s)
- Anurag Noonikara-Poyil
- Department of Chemistry and Biochemistry, The University of Texas at Arlington Arlington TX 76019 USA
| | - Alvaro Muñoz-Castro
- Grupo de Química Inorgánica y Materiales Moleculares, Facultad de Ingeniería, Universidad Autonoma de Chile El Llano Subercaseaux 2801 Santiago Chile
| | | | - Pavel K Mykhailiuk
- Enamine Ltd Chervonotkatska 78 02094 Kyiv Ukraine
- Chemistry Department, Taras Shevchenko National University of Kyiv Volodymyrska 64 01601 Kyiv Ukraine
| | - H V Rasika Dias
- Department of Chemistry and Biochemistry, The University of Texas at Arlington Arlington TX 76019 USA
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6
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Zacharias AO, Mao JX, Nam K, Dias HVR. Copper(I) and silver(I) chemistry of vinyltrifluoroborate supported by a bis(pyrazolyl)methane ligand. Dalton Trans 2021; 50:7621-7632. [PMID: 33999090 DOI: 10.1039/d1dt00974e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Although unsaturated organotrifluoroborates are common synthons in metal-organic chemistry, their transition metal complexes have received little attention. [CH2(3,5-(CH3)2Pz)2]Cu(CH2[double bond, length as m-dash]CHBF3), (SIPr)Cu(MeCN)(CH2[double bond, length as m-dash]CHBF3) and [CH2(3,5-(CH3)2Pz)2]Ag(CH2[double bond, length as m-dash]CHBF3) represent rare, isolable molecules featuring a vinyltrifluoroborate ligand on coinage metals. The X-ray crystal structures show the presence of three-coordinate metal sites in these complexes. The vinyltrifluoroborate group binds asymmetrically to the metal site in [CH2(3,5-(CH3)2Pz)2]M(CH2[double bond, length as m-dash]CHBF3) (M = Cu, Ag) with relatively closer M-C(H)2 distances. The computed structures of [CH2(3,5-(CH3)2Pz)2]M(CH2[double bond, length as m-dash]CHBF3) and M(CH2[double bond, length as m-dash]CHBF3), however, have shorter M-C(H)BF3 distances than M-C(H)2. These molecules feature various inter- or intra-molecular contacts involving fluorine of the BF3 group, possibly affecting these M-C distances. The binding energies of [CH2[double bond, length as m-dash]CHBF3]- to Cu+, Ag+ and Au+ have been calculated at the wB97XD/def2-TZVP level of theory, in the presence and absence of the supporting ligand CH2(3,5-(CH3)2Pz)2. The calculation shows that Au+ has the strongest binding to the [CH2[double bond, length as m-dash]CHBF3]- ligand, followed by Cu+ and Ag+, irrespective of the presence of the supporting ligand. However, in all three metals, the supporting ligand weakens the binding of olefin to the metal. The same trends were also found from the analysis of the σ-donation and π-backbonding interactions between the metal fragment and the π and π* orbitals of [CH2[double bond, length as m-dash]CHBF3]-.
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Affiliation(s)
- Adway O Zacharias
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, USA.
| | - James X Mao
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, USA.
| | - Kwangho Nam
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, USA.
| | - H V Rasika Dias
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, USA.
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7
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Abstract
Treatment of bis(pyrazolyl)borate ligand supported [(CF3)2Bp]Cu(NCMe) with 1,2,3-trisubstituted cyclopropenes produced thermally stable copper(I) η2-cyclopropene complexes amenable to detailed solution and solid-state analysis. The [(CF3)2Bp]Cu(NCMe) also catalyzed [2 + 1]-cycloaddition chemistry of terminal and internal alkynes with ethyl diazoacetate affording cyclopropenes, including those used as ligands in this work. The tris(pyrazolyl)borate [(CF3)2Tp]Cu(NCMe) is a competent catalyst for this process as well. The treatment of [(CF3)2Tp]Cu with ethyl 2,3-diethylcycloprop-2-enecarboxylate substrate gave an O-bonded rather than a η2-cyclopropene copper complex.
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Affiliation(s)
- Anurag Noonikara-Poyil
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019-0065, United States
| | - Shawn G Ridlen
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019-0065, United States
| | - H V Rasika Dias
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019-0065, United States
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8
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Elashkar AH, Parasar D, Muñoz-Castro A, Doherty CM, Cowan MG, Dias HVR. Isolable 1-Butene Copper(I) Complexes and 1-Butene/Butane Separation Using Structurally Adaptable Copper Pyrazolates. Chempluschem 2020; 86:364-372. [PMID: 33300685 DOI: 10.1002/cplu.202000694] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 11/25/2020] [Indexed: 11/11/2022]
Abstract
Non-porous small molecule adsorbents such as {[3,5-(CF3 )2 Pz]Cu}3 (where Pz=pyrazolate) are an emerging class of materials that display attractive features for ethene-ethane separation. This work examines the chemistry of fluorinated copper(I) pyrazolates {[3,5-(CF3 )2 Pz]Cu}3 and {[4-Br-3,5-(CF3 )2 Pz]Cu}3 with much larger 1-butene in both solution and solid state, and reports the isolation of rare 1-butene complexes of copper(I), {[3,5-(CF3 )2 Pz]Cu(H2 C=CHC2 H5 )}2 and {[4-Br-3,5-(CF3 )2 Pz]Cu(H2 C=CHC2 H5 )}2 and their structural, spectroscopic, and computational data. The copper-butene adduct formation in solution involves olefin-induced structural transformation of trinuclear copper(I) pyrazolates to dinuclear mixed-ligand systems. Remarkably, larger 1-butene is able to penetrate the dense solid material and to coordinate with copper(I) ions at high molar occupancy. A comparison to analogous ethene and propene complexes of copper(I) is also provided.
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Affiliation(s)
- Ahmed H Elashkar
- Department of Chemical and Process Engineering, University of Canterbury, Christchurch, 8140, New Zealand
| | - Devaborniny Parasar
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas, 76019, USA
| | - Alvaro Muñoz-Castro
- Grupo de Química Inorgánica y Materiales Moleculares Facultad de Ingeniería, Universidad Autonoma de Chile El Llano Subercaseaux, 2801, Santiago, Chile
| | | | - Matthew G Cowan
- Department of Chemical and Process Engineering, University of Canterbury, Christchurch, 8140, New Zealand
| | - H V Rasika Dias
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas, 76019, USA
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9
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Huang YC, Chen HY, Chang YL, Vasanthakumar P, Chen SY, Kao CL, Wu CHY, Hsu SC. Synthesis of triisocyanomesitylene β‑diketiminato copper(I) complexes and evaluation of isocyanide π-back bonding. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114828] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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10
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Parasar D, Elashkar AH, Yakovenko AA, Jayaratna NB, Edwards BL, Telfer SG, Dias HVR, Cowan MG. Overcoming Fundamental Limitations in Adsorbent Design: Alkene Adsorption by Non-porous Copper(I) Complexes. Angew Chem Int Ed Engl 2020; 59:21001-21006. [PMID: 32844553 DOI: 10.1002/anie.202010405] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Indexed: 11/08/2022]
Abstract
Purifying alkenes from alkanes requires cryogenic distillation. This consumes energy equivalent to countries of ca. 5 million people. Replacing distillation with adsorption processes would significantly increase energy efficiency. Trade-offs between kinetics, selectivity, capacity, and heat of adsorption have prevented production of an optimal adsorbent. We report adsorbents that overcome these trade-offs. [Cu-Br]3 and [Cu-H]3 are air-stable trinuclear complexes that undergo reversible solid-state inter-molecular rearrangements to produce dinuclear [Cu-Br⋅(alkene)]2 and [Cu-H⋅(alkene)]2 . The reversible solid-state rearrangement, confirmed in situ using powder X-ray diffraction, allows adsorbent design trade-offs to be overcome, coupling low heat of adsorption (-10 to -17 kJ mol-1 alkene ), high alkene:alkane selectivity (47; 29), and uptake capacity (>2.5 molalkene mol-1 Cu3 ). Most remarkably, [Cu-H]3 displays fast uptake and regenerates capacity within 10 minutes.
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Affiliation(s)
- Devaborniny Parasar
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, TX, 76019, USA
| | - Ahmed H Elashkar
- Department of Chemical and Process Engineering, University of Canterbury, Christchurch, 8140, New Zealand
| | - Andrey A Yakovenko
- X-Ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Naleen B Jayaratna
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, TX, 76019, USA
| | - Brian L Edwards
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, TX, 76019, USA
| | - Shane G Telfer
- MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Fundamental Sciences, Massey University, Palmerston North, New Zealand
| | - H V Rasika Dias
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, TX, 76019, USA
| | - Matthew G Cowan
- Department of Chemical and Process Engineering, University of Canterbury, Christchurch, 8140, New Zealand
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11
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Parasar D, Elashkar AH, Yakovenko AA, Jayaratna NB, Edwards BL, Telfer SG, Dias HVR, Cowan MG. Overcoming Fundamental Limitations in Adsorbent Design: Alkene Adsorption by Non‐porous Copper(I) Complexes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010405] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Devaborniny Parasar
- Department of Chemistry and Biochemistry The University of Texas at Arlington Arlington TX 76019 USA
| | - Ahmed H. Elashkar
- Department of Chemical and Process Engineering University of Canterbury Christchurch 8140 New Zealand
| | - Andrey A. Yakovenko
- X-Ray Science Division Advanced Photon Source Argonne National Laboratory Argonne IL 60439 USA
| | - Naleen B. Jayaratna
- Department of Chemistry and Biochemistry The University of Texas at Arlington Arlington TX 76019 USA
| | - Brian L. Edwards
- Department of Chemistry and Biochemistry The University of Texas at Arlington Arlington TX 76019 USA
| | - Shane G. Telfer
- MacDiarmid Institute for Advanced Materials and Nanotechnology School of Fundamental Sciences Massey University Palmerston North New Zealand
| | - H. V. Rasika Dias
- Department of Chemistry and Biochemistry The University of Texas at Arlington Arlington TX 76019 USA
| | - Matthew G. Cowan
- Department of Chemical and Process Engineering University of Canterbury Christchurch 8140 New Zealand
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12
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Nicolay A, Ziegler MS, Small DW, Grünbauer R, Scheer M, Tilley TD. Isomerism and dynamic behavior of bridging phosphaalkynes bound to a dicopper complex. Chem Sci 2020; 11:1607-1616. [PMID: 32206279 PMCID: PMC7069238 DOI: 10.1039/c9sc05835d] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Accepted: 12/13/2019] [Indexed: 11/21/2022] Open
Abstract
A dicopper complex featuring a symmetrically bridging nitrile ligand and supported by a binucleating naphthyridine-based ligand, [Cu2(μ-η 1 :η 1 -MeCN)DPFN](NTf2)2, was treated with phosphaalkynes (RC[triple bond, length as m-dash]P, isoelectronic analogues of nitriles) to yield dicopper complexes that exhibit phosphaalkynes in rare μ-η 2:η 2 binding coordination modes. X-ray crystallography revealed that these unusual "tilted" structures exist in two isomeric forms (R "up" vs. R "sideways"), depending on the steric profile of the phosphaalkyne's alkyl group (R = Me, Ad, or t Bu). Only one isomer is observed in both solution and the solid state for R = Me (sideways) and t Bu (up). With intermediate steric bulk (R = Ad), the energy difference between the two geometries is small enough that both are observed in solution, and NMR spectroscopy and computations indicate that the solid-state structure corresponds to the minor isomer observed in solution. Meanwhile, treatment of [Cu2(μ-η 1:η 1-MeCN)DPFN](NTf2)2 with 2-butyne affords [Cu2(μ-η 2:η 2-(MeC[triple bond, length as m-dash]CMe))DPFN](NTf2)2: its similar ligand geometry demonstrates that the tilted μ-η 2:η 2 binding mode is not limited to phosphaalkynes but reflects a more general trend, which can be rationalized via an NBO analysis showing maximization of π-backbonding.
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Affiliation(s)
- Amélie Nicolay
- Department of Chemistry , University of California, Berkeley , Berkeley , CA 94720-1460 , USA . .,Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
| | - Micah S Ziegler
- Department of Chemistry , University of California, Berkeley , Berkeley , CA 94720-1460 , USA . .,Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
| | - David W Small
- Department of Chemistry , University of California, Berkeley , Berkeley , CA 94720-1460 , USA .
| | - Rebecca Grünbauer
- Institut für Anorganische Chemie , Universität Regensburg , 93040 Regensburg , Germany .
| | - Manfred Scheer
- Institut für Anorganische Chemie , Universität Regensburg , 93040 Regensburg , Germany .
| | - T Don Tilley
- Department of Chemistry , University of California, Berkeley , Berkeley , CA 94720-1460 , USA . .,Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
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13
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Wang Y, Ma X, Ding Y, Wang J, Yang Z. The study on the solubility of main group organometallics in selected solvents and the thermodynamic model of solubility correlation under inert atmosphere. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111541] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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Goettel JT, Braunschweig H. Recent advances in boron-centered ligands and their transition metal complexes. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2018.09.013] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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15
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Parasar D, Almotawa RM, Jayaratna NB, Ceylan YS, Cundari TR, Omary MA, Dias HVR. Synthesis, Photophysical Properties, and Computational Analysis of Di- and Tetranuclear Alkyne Complexes of Copper(I) Supported by a Highly Fluorinated Pyrazolate. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00657] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Devaborniny Parasar
- Department of Chemistry and Biochemistry, University of Texas at Arlington, Arlington, Texas 76019, United States
| | - Ruaa M. Almotawa
- Department of Chemistry, Center for Advanced Scientific Computing and Modeling (CASCaM), University of North Texas, Denton, Texas 76203, United States
| | - Naleen B. Jayaratna
- Department of Chemistry and Biochemistry, University of Texas at Arlington, Arlington, Texas 76019, United States
| | - Yavuz S. Ceylan
- Department of Chemistry, Center for Advanced Scientific Computing and Modeling (CASCaM), University of North Texas, Denton, Texas 76203, United States
| | - Thomas R. Cundari
- Department of Chemistry, Center for Advanced Scientific Computing and Modeling (CASCaM), University of North Texas, Denton, Texas 76203, United States
| | - Mohammad A. Omary
- Department of Chemistry, Center for Advanced Scientific Computing and Modeling (CASCaM), University of North Texas, Denton, Texas 76203, United States
| | - H. V. Rasika Dias
- Department of Chemistry and Biochemistry, University of Texas at Arlington, Arlington, Texas 76019, United States
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16
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Chand K, Tsai C, Chen H, Ching W, Hsu S, Carey JR, Hsu SCN. Improved Synthesis of Unsymmetrical
N
‐Aryl‐
N′
‐alkylpyridyl ß‐Diketimines Using Molecular Sieves and their Lithium Complexes. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201701383] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kuldeep Chand
- Department of Medicinal and Applied Chemistry Kaohsiung Medical University 807 Kaohsiung Taiwan
| | - Cheng‐Long Tsai
- Department of Medicinal and Applied Chemistry Kaohsiung Medical University 807 Kaohsiung Taiwan
| | - Hsuan‐Ying Chen
- Department of Medicinal and Applied Chemistry Kaohsiung Medical University 807 Kaohsiung Taiwan
| | - Wei‐Min Ching
- Instrumentation Center National Taiwan Normal University 11677 Department of Chemistry Taiwan
| | - Sung‐Po Hsu
- Department of Physiology School of Medicine College of Medicine Taipei Medical University 110 Taipei Taiwan
| | - James R. Carey
- Department of Medicinal and Applied Chemistry Kaohsiung Medical University 807 Kaohsiung Taiwan
- Department of Applied Chemistry National University of Kaohsiung 804 Kaohsiung Taiwan
| | - Sodio C. N. Hsu
- Department of Medicinal and Applied Chemistry Kaohsiung Medical University 807 Kaohsiung Taiwan
- Department of Medical Research Kaohsiung Medical University Hospital 807 Kaohsiung Taiwan
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17
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Zhu X, Li Y, Guo D, Wang S, Wei Y, Zhou S. Versatile reactivities of rare-earth metal dialkyl complexes supported by a neutral pyrrolyl-functionalized β-diketiminato ligand. Dalton Trans 2018; 47:3947-3957. [DOI: 10.1039/c7dt04410k] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first unprecedented examples of S-β-diketiminato species were disclosed in the reactions of rare-earth dialkyl complexes with S8.
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Affiliation(s)
- Xiancui Zhu
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Yang Li
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Dianjun Guo
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Shaowu Wang
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Yun Wei
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Shuangliu Zhou
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
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18
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Wang SR, Arrowsmith M, Braunschweig H, Dewhurst RD, Dömling M, Mattock JD, Pranckevicius C, Vargas A. Monomeric 16-Electron π-Diborene Complexes of Zn(II) and Cd(II). J Am Chem Soc 2017; 139:10661-10664. [PMID: 28745882 DOI: 10.1021/jacs.7b06644] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Despite the prevalence of stable π-complexes of most d10 metals, such as Cu(I) and Ni(0), with ethylene and other olefins, complexation of d10 Zn(II) to simple olefins is too weak to form isolable complexes due to the metal ion's limited capacity for π-backdonation. By employing more strongly donating π-ligands, namely neutral diborenes with a high-lying π(B═B) orbital, monomeric 16-electron M(II)-diborene (M = Zn, Cd) π-complexes were synthesized in good yields. Metal-B2 π-interactions in both the solid and solution state were confirmed by single-crystal X-ray analyses and their solution NMR and UV-vis absorption spectroscopy, respectively. The M(II) centers adopt a trigonal planar geometry and interact almost symmetrically with both boron atoms. The MB2 planes significantly twist out of the MX2 planes about the M-centroid(B-B) vector, with angles ranging from 47.0° to 85.5°, depending on the steric interactions between the diborene ligand and the MX2 fragment.
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Affiliation(s)
- Sunewang R Wang
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany.,Institute for Sustainable Chemistry and Catalysis with Boron, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Merle Arrowsmith
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany.,Institute for Sustainable Chemistry and Catalysis with Boron, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Holger Braunschweig
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany.,Institute for Sustainable Chemistry and Catalysis with Boron, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Rian D Dewhurst
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany.,Institute for Sustainable Chemistry and Catalysis with Boron, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Michael Dömling
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany.,Institute for Sustainable Chemistry and Catalysis with Boron, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - James D Mattock
- Department of Chemistry, School of Life Sciences, University of Sussex , Brighton BN1 9QJ, Sussex, United Kingdom
| | - Conor Pranckevicius
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany.,Institute for Sustainable Chemistry and Catalysis with Boron, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Alfredo Vargas
- Department of Chemistry, School of Life Sciences, University of Sussex , Brighton BN1 9QJ, Sussex, United Kingdom
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19
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Chuang WJ, Hsu SP, Chand K, Yu FL, Tsai CL, Tseng YH, Lu YH, Kuo JY, Carey JR, Chen HY, Chen HY, Chiang MY, Hsu SCN. Reactivity Study of Unsymmetrical β-Diketiminato Copper(I) Complexes: Effect of the Chelating Ring. Inorg Chem 2017; 56:2722-2735. [PMID: 28225607 DOI: 10.1021/acs.inorgchem.6b02876] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
β-Diketiminato copper(I) complexes play important roles in bioinspired catalytic chemistry and in applications to the materials industry. However, it has been observed that these complexes are very susceptible to disproportionation. Coordinating solvents or Lewis bases are typically used to prevent disproportionation and to block the coordination sites of the copper(I) center from further decomposition. Here, we incorporate this coordination protection directly into the molecule in order to increase the stability and reactivity of these complexes and to discover new copper(I) binding motifs. Here we describe the synthesis, structural characterization, and reactivity of a series of unsymmetrical N-aryl-N'-alkylpyridyl β-diketiminato copper(I) complexes and discuss the structures and reactivity of these complexes with respect to the length of the pyridyl arm. All of the aforementioned unsymmetrical ß-diketiminato copper(I) complexes bind CO reversibly and are stable to disproportionation. The binding ability of CO and the rate of pyridyl ligand decoordination of these copper(I) complexes are directly related to the competition between the degree of puckering of the chelate system and the steric demands of the N-aryl substituent.
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Affiliation(s)
- Wan-Jung Chuang
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Sung-Po Hsu
- Department of Physiology, School of Medicine, College of Medicine, Taipei Medical University , Taipei 110, Taiwan.,Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University , Taipei 110, Taiwan
| | - Kuldeep Chand
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Fu-Lun Yu
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Cheng-Long Tsai
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Yu-Hsuan Tseng
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Yuh-Hsiu Lu
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Jen-Yu Kuo
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - James R Carey
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan.,Department of Applied Chemistry, National University of Kaohsiung , Kaohsiung 804, Taiwan
| | - Hsuan-Ying Chen
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Hsing-Yin Chen
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Michael Y Chiang
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan.,Department of Chemistry, National Sun Yat-Sen University , Kaohsiung 804, Taiwan
| | - Sodio C N Hsu
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
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20
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Phanopoulos A, Leung AHM, Yow S, Palomas D, White AJP, Hellgardt K, Horton A, Crimmin MR. Binuclear β-diketiminate complexes of copper(i). Dalton Trans 2017; 46:2081-2090. [DOI: 10.1039/c6dt04246e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The reaction of a series of dinucleating bis(β-diketiminate) pro-ligands with mesitylcopper in the presence and absence of mono and diphosphines has allowed the isolation of a new series of dicopper(i) complexes.
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Affiliation(s)
| | | | - Shuhui Yow
- Department of Chemistry
- Imperial College London
- London
- UK
| | - David Palomas
- Department of Chemistry
- Imperial College London
- London
- UK
| | | | - Klaus Hellgardt
- Department of Chemical Engineering
- Imperial College London
- London
- UK
| | - Andrew Horton
- PTI/DX Emerging Technologies
- Shell Global Solutions International B.V
- 1030 BN Amsterdam
- The Netherlands
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21
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Bussey KA, Cavalier AR, Mraz ME, Oshin KD, Sarjeant A, Pintauer T. Synthesis, characterization, X-ray crystallography analysis, and catalytic activity of bis(2-pyridylmethyl)amine copper complexes containing coupled pendent olefinic arms in atom transfer radical addition (ATRA) reactions. Polyhedron 2016. [DOI: 10.1016/j.poly.2015.12.043] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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22
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Li X, Meng F, Torker S, Shi Y, Hoveyda AH. Catalytic Enantioselective Conjugate Additions of (pin)B-Substituted Allylcopper Compounds Generated in situ from Butadiene or Isoprene. Angew Chem Int Ed Engl 2016; 55:9997-10002. [PMID: 27436785 DOI: 10.1002/anie.201605001] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2016] [Indexed: 02/03/2023]
Abstract
Multicomponent catalytic enantioselective transformations that entail the combination of butadiene or isoprene (common feedstock), an enoate (prepared in one step) and B2 (pin)2 (commercially available) are presented. These processes constitute an uncommon instance of conjugate addition of an allyl moiety and afford the desired products in up to 83 % yield and 98:2 enantiomeric ratio. Based on DFT calculations stereochemical models and rationale for the observed profiles in selectivity are provided.
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Affiliation(s)
- Xiben Li
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Fanke Meng
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Sebastian Torker
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Ying Shi
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Amir H Hoveyda
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA.
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23
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Li X, Meng F, Torker S, Shi Y, Hoveyda AH. Catalytic Enantioselective Conjugate Additions of (pin)B‐Substituted Allylcopper Compounds Generated in situ from Butadiene or Isoprene. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605001] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Xiben Li
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| | - Fanke Meng
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| | - Sebastian Torker
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| | - Ying Shi
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| | - Amir H. Hoveyda
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
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24
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Hong Y, Zheng Y, Xue M, Yao Y, Zhang Y, Shen Q. Phenylene-bridged β-Ketoiminate Dilanthanide Aryloxides: Synthesis, Structure, and Catalytic Activity for Addition of Amines to Carbodiimides. Z Anorg Allg Chem 2015. [DOI: 10.1002/zaac.201500047] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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25
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Halbert S, Gérard H. A computational study of the effects of ancillary ligands on copper(i)–ethylene interaction. NEW J CHEM 2015. [DOI: 10.1039/c5nj00546a] [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
Structural and electronic calculations on a ligand database are used to quantify the influence of the ancillary ligands and coordination mode on the electronic structure of Cu(i) ethylene complexes.
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Affiliation(s)
- Stéphanie Halbert
- Sorbonne Universités
- UPMC Univ Paris 06
- UMR 7616
- Laboratoire de Chimie Théorique
- Paris
| | - Hélène Gérard
- Sorbonne Universités
- UPMC Univ Paris 06
- UMR 7616
- Laboratoire de Chimie Théorique
- Paris
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26
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Huang TH, Yan J, Liu YF, Xie YT, Jia C. Synthesis, Structural Characterisation, and Spectroscopic Properties of Copper(I) Complexes and their Applications to Dye-Sensitised Solar Cells. Aust J Chem 2015. [DOI: 10.1071/ch14562] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Based on the ligand 1,4-bis(2-(diphenylphophino)benzylideneamino)benzene (pbb), two complexes, [Cu2(pbb)(2,2′-bipyridine)2](BF4)2 (1) and [Cu2(pbb)(phen)2](BF4)2 (2), have been prepared and characterised by IR, 1H NMR, 31P NMR, 19F NMR, and 11B NMR spectroscopy and X-ray crystal structure analysis. Structural analysis reveals that complexes 1 and 2 contain 1D infinite chains and 2D supramolecular networks constructed by C–H···π and π···π interactions, and an ordered-layer-lattice of BF4– is located between these 2D networks. The results show that C–H···π and π···π interactions play an important role in the formation of 2D supramolecular networks. The UV-vis absorption peaks of complexes 1 and 2 display intraligand charge transfer and metal to ligand charge transfer (MLCT) absorption. Complexes 1 and 2 display efficient luminescent emission assigned to MLCT excited states, and the maximum emissions of these complexes in acetonitrile solution are different from those of the solid-state samples. In addition, complexes 1 and 2 have been exploited as sensitisers in dye-sensitised solar cells, and efficiencies are also observed.
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27
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Gutiérrez-Ramos BD, Bañuelos J, Arbeloa T, Arbeloa IL, González-Navarro PE, Wrobel K, Cerdán L, García-Moreno I, Costela A, Peña-Cabrera E. Straightforward Synthetic Protocol for the Introduction of Stabilized C Nucleophiles in the BODIPY Core for Advanced Sensing and Photonic Applications. Chemistry 2014; 21:1755-64. [DOI: 10.1002/chem.201405233] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Indexed: 12/22/2022]
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28
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Murray LJ, Weare WW, Shearer J, Mitchell AD, Abboud KA. Isolation of a (Dinitrogen)Tricopper(I) Complex. J Am Chem Soc 2014; 136:13502-5. [DOI: 10.1021/ja506445d] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Leslie J. Murray
- Department
of Chemistry, Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Walter W. Weare
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Jason Shearer
- Department
of Chemistry, University of Nevada, Reno, Reno, Nevada 89557, United States
| | - Alyssa D. Mitchell
- Department
of Chemistry, Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Khalil A. Abboud
- Department
of Chemistry, Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
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29
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Setsune JI, Su CL, Takao Y. Structure of Copper(I) π Complex of N, N′-Etheno-bridged Porphyrin and Its Oxidation to Di(µ-hydroxo)dicopper(II) Diporphyrin. CHEM LETT 2014. [DOI: 10.1246/cl.140289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | - Chuen Lin Su
- Department of Chemistry, Graduate School of Science, Kobe University
| | - Yuko Takao
- Osaka Municipal Technical Research Institute
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30
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Whitehorne TJJ, Vabre B, Schaper F. Lactide polymerization catalyzed by Mg and Zn diketiminate complexes with flexible ligand frameworks. Dalton Trans 2014; 43:6339-52. [PMID: 24599488 DOI: 10.1039/c3dt53278j] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Diketimine ligands bearing N-benzyl, N-9-anthrylmethyl and N-mesitylmethyl substituents (nacnac(Bn)H, nacnac(An)H, and nacnac(Mes)H) were prepared from condensation of the amine with either acetyl acetone or its ethylene glycol monoketal. Chlorination with N-chlorosuccinimide in the 3-position yielded Clnacnac(Bn)H and Clnacnac(An)H. The ligands were reacted with Zn(TMSA)2 (TMSA = N(SiMe3)2) to yield nacnac(An)Zn(TMSA) and Clnacnac(Bn)Zn(TMSA). Protonation with isopropanol afforded nacnac(An)ZnOiPr and Clnacnac(Bn)ZnOiPr. Reaction of the diketimines with Mg(TMSA)2 afforded nacnac(An)Mg(TMSA), nacnac(Mes)Mg(TMSA), Clnacnac(Bn)Mg(TMSA) and Clnacnac(An)Mg(TMSA). Subsequent protonation with tert-butanol produced nacnac(Mes)MgOtBu and Clnacnac(Bn)MgOtBu, but only decomposition was observed with N-anthrylmethyl substituents. Most complexes were characterized by X-ray diffraction studies. TMSA complexes were monomeric and alkoxide complexes dimeric in the solid state. All alkoxide complexes, as well as nacnac(An)Mg(TMSA)/BnOH and Clnacnac(An)Mg(TMSA)/BnOH were moderately to highly active in rac-lactide polymerization (90% conversion in 30 s to 3 h). nacnac(An)ZnOiPr produced highly heterotactic polymers (P(r) = 0.90), Clnacnac(Bn)MgOtBu/BnOH produced slightly isotactic polymers at -30 °C (P(r) = 0.43), and all other catalysts produced atactic polymers with a slight heterotactic bias.
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Affiliation(s)
- Todd J J Whitehorne
- Centre in Green Chemistry and Catalysis (CGCC), Département de chimie, Université de Montréal, 2900 Boul. E.-Montpetit, Montréal, QC, H3T 1J4, Canada.
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31
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Zheng Y, Jiao R, Shen X, Xue M, Yao Y, Zhang Y, Shen Q. Bis(β‐diketiminato) lanthanide amides: synthesis, structure and catalysis for the polymerization of
l
‐lactide and ε‐caprolactone. Appl Organomet Chem 2014. [DOI: 10.1002/aoc.3150] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yu Zheng
- Key Laboratory of Organic Synthesis of Jiangsu ProvinceCollege of ChemistryChemical Engineering and Materials ScienceSoochow University Suzhou 215123 People's Republic of China
| | - Rui Jiao
- Key Laboratory of Organic Synthesis of Jiangsu ProvinceCollege of ChemistryChemical Engineering and Materials ScienceSoochow University Suzhou 215123 People's Republic of China
| | - Xiao‐dong Shen
- Key Laboratory of Organic Synthesis of Jiangsu ProvinceCollege of ChemistryChemical Engineering and Materials ScienceSoochow University Suzhou 215123 People's Republic of China
| | - Ming‐qiang Xue
- Key Laboratory of Organic Synthesis of Jiangsu ProvinceCollege of ChemistryChemical Engineering and Materials ScienceSoochow University Suzhou 215123 People's Republic of China
| | - Ying‐ming Yao
- Key Laboratory of Organic Synthesis of Jiangsu ProvinceCollege of ChemistryChemical Engineering and Materials ScienceSoochow University Suzhou 215123 People's Republic of China
| | - Yong Zhang
- Key Laboratory of Organic Synthesis of Jiangsu ProvinceCollege of ChemistryChemical Engineering and Materials ScienceSoochow University Suzhou 215123 People's Republic of China
| | - Qi Shen
- Key Laboratory of Organic Synthesis of Jiangsu ProvinceCollege of ChemistryChemical Engineering and Materials ScienceSoochow University Suzhou 215123 People's Republic of China
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32
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Li D, Peng Y, Geng C, Liu K, Kong D. Well-controlled ring-opening polymerization of cyclic esters initiated by dialkylaluminum β-diketiminates. Dalton Trans 2014; 42:11295-303. [PMID: 23817900 DOI: 10.1039/c3dt50372k] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A series of aluminum alkyl complexes nacnacRAlMe2 (2a-2h) bearing aliphatic N-substituted β-diketiminate ligands (nacnacRH = N,N'-dialkyl-2-amino-4-iminopent-2-enes), were prepared from the reaction of trialkyl aluminum and the corresponding β-diketimines. All these aluminum complexes were characterized by NMR, elemental analysis and HRMS spectroscopy. The molecular structures of complexes 2a, 2c and 2h were confirmed by single-crystal X-ray diffraction. These aluminum alkyl complexes show notable activity towards the ring-opening polymerization of ε-caprolactone in the absence and presence of alcohol, and the resulting polymers have narrow molecular weight distributions.
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Affiliation(s)
- Di Li
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and Technology, Dalian University of Technology, Dalian 116024, PR China
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33
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Whitehorne TJJ, Schaper F. Square-Planar Cu(II) Diketiminate Complexes in Lactide Polymerization. Inorg Chem 2013; 52:13612-22. [DOI: 10.1021/ic402133c] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Todd J. J. Whitehorne
- Département
de chimie, Université de Montréal, 2900 Boul. E.-Montpetit, Montréal, Quebec, H3T 1J4, Canada
| | - Frank Schaper
- Département
de chimie, Université de Montréal, 2900 Boul. E.-Montpetit, Montréal, Quebec, H3T 1J4, Canada
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34
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Cai LX, Yao YM, Xue MQ, Zhang Y, Shen Q. β-Diketiminatoytterbium aryloxides: synthesis, structural characterization, and catalytic activity for addition of amines to carbodiimides. Appl Organomet Chem 2013. [DOI: 10.1002/aoc.2996] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ling-xia Cai
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
| | - Ying-ming Yao
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
| | - Ming-qiang Xue
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
| | - Yong Zhang
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
| | - Qi Shen
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
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35
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Ebrahimpour P, Haddow MF, Wass DF. New Cu(I)-Ethylene Complexes Based on Tridentate Imine Ligands: Synthesis and Structure. Inorg Chem 2013; 52:3765-71. [DOI: 10.1021/ic302325u] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Parisa Ebrahimpour
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol
BS8 1TS, U.K
| | - Mairi F. Haddow
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol
BS8 1TS, U.K
| | - Duncan F. Wass
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol
BS8 1TS, U.K
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36
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Affiliation(s)
- Heinrich Lang
- Department of Inorganic
Chemistry, Institute of Chemistry, Faculty of Natural
Sciences, Chemnitz University of Technology, Straße der Nationen 62, 09111 Chemnitz, Germany
| | - Alexander Jakob
- Department of Inorganic
Chemistry, Institute of Chemistry, Faculty of Natural
Sciences, Chemnitz University of Technology, Straße der Nationen 62, 09111 Chemnitz, Germany
| | - Bianca Milde
- Department of Inorganic
Chemistry, Institute of Chemistry, Faculty of Natural
Sciences, Chemnitz University of Technology, Straße der Nationen 62, 09111 Chemnitz, Germany
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37
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Shen X, Xue M, Jiao R, Ma Y, Zhang Y, Shen Q. Bis(β-diketiminate) Rare-Earth-Metal Borohydrides: Syntheses, Structures, and Catalysis for the Polymerizations of l-Lactide, ε-Caprolactone, and Methyl Methacrylate. Organometallics 2012. [DOI: 10.1021/om3005299] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiaodong Shen
- Key Laboratory of
Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s
Republic of China
| | - Mingqiang Xue
- Key Laboratory of
Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s
Republic of China
| | - Rui Jiao
- Key Laboratory of
Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s
Republic of China
| | - Yong Ma
- Key Laboratory of
Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s
Republic of China
| | - Yong Zhang
- Key Laboratory of
Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s
Republic of China
| | - Qi Shen
- Key Laboratory of
Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s
Republic of China
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences,
Shanghai 200032, People’s Republic of China
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38
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Examining the impact of ancillary ligand basicity on copper(I)–ethylene binding interactions: a DFT study. Theor Chem Acc 2012. [DOI: 10.1007/s00214-012-1105-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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39
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40
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Carrera N, Savjani N, Simpson J, Hughes DL, Bochmann M. Syntheses and structures of thermally stable diketiminato complexes of gold and copper. Dalton Trans 2011; 40:1016-9. [DOI: 10.1039/c0dt01422b] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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41
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Drouin F, Whitehorne TJJ, Schaper F. NacnacBnMgOtBu: a diketiminate-based catalyst for the polymerisation of rac-lactide with slight isotactic preference. Dalton Trans 2011; 40:1396-400. [DOI: 10.1039/c0dt01294g] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Michon C, Medina F, Capet F, Roussel P, Agbossou-Niedercorn F. Inter- and Intramolecular Hydroamination of Unactivated Alkenes Catalysed by a Combination of Copper and Silver Salts: The Unveiling of a Brønstedt Acid Catalysis. Adv Synth Catal 2010. [DOI: 10.1002/adsc.201000536] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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43
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Cabrera AR, Schneider Y, Valderrama M, Fröhlich R, Kehr G, Erker G, Rojas RS. Synthesis of a [(π-Cyano-nacnac)Cp]zirconium Complex and Its Remote Activation for Ethylene Polymerization. Organometallics 2010. [DOI: 10.1021/om100866t] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Alan R. Cabrera
- Departamento de Química Inorgánica, Facultad de Química, Pontificia Universidad Católica de Chile, Casilla 306, Santiago-22, Chile
| | - Yanika Schneider
- Departments of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106
| | - Mauricio Valderrama
- Departamento de Química Inorgánica, Facultad de Química, Pontificia Universidad Católica de Chile, Casilla 306, Santiago-22, Chile
| | - Roland Fröhlich
- Organisch-Chemisches Institut, Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
| | - Gerald Kehr
- Organisch-Chemisches Institut, Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
| | - Gerhard Erker
- Organisch-Chemisches Institut, Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
| | - Rene S. Rojas
- Departamento de Química Inorgánica, Facultad de Química, Pontificia Universidad Católica de Chile, Casilla 306, Santiago-22, Chile
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44
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El-Zoghbi I, Ased A, Oguadinma PO, Tchirioua E, Schaper F. One-pot synthesis of β-diketimine ligands. CAN J CHEM 2010. [DOI: 10.1139/v10-109] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Symmetric N,N′-dialkyl-2-amino-4-imino-pent-2-enes (nacnacRH) can be prepared in high yields in a simple one-pot reaction from acetylacetone and 2 equiv. of amine. Optimized conditions require the azeotropic removal of water, use of a minimum amount of solvent, and of 1 equiv. of acid. Either para-toluenesulfonic acid, hydrochloric acid, or a mixture of both can be employed, with the latter being most advantageous. Symmetric nacnacRH are thus obtained in higher than 95% purity and with 65% yield for R = Me and 80%–95% yields for R = n-Pr, i-Pr, i-Bu, Bn, Cy, and (+)-CH(Me)Ph.
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Affiliation(s)
- Ibrahim El-Zoghbi
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - Aysha Ased
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - Paul O. Oguadinma
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - Ekou Tchirioua
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - Frank Schaper
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
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45
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Oguadinma PO, Schaper F. Synthesis and structures of isopropyl-β-diketiminato copper(I) complexes. CAN J CHEM 2010. [DOI: 10.1139/v10-013] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The reaction of N,N′-diisopropyl-2-amino-4-iminopent-2-ene (nacnaci-PrH, 1) either with CuOt-Bu or with a mixture of mesityl copper and 10% CuOt-Bu afforded, in the presence of PPh3, CN(C6Me2H3), or MeCN, the Lewis base coordinated complexes nacnaci-PrCuPPh3·0.5 C6H14 (2), nacnaci-PrCuCN(C6Me2H3) (3), and nacnaci-PrCu(NCMe) (4). Compounds 2, 3, and 4 were characterized by single-crystal X-ray diffraction studies. Compound 4 afforded two species in deuterated benzene in a 2:1 ratio, which were assigned to {nacnaci-PrCu}2(μ-NCMe) and nacnaci-PrCuNCMe (4). Upon addition of 5 equiv. of MeCN, the two sets collapsed into that of 4. No copper complexes were formed in the presence of styrene, stilbene, or diphenylacetylene.
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Affiliation(s)
- Paul O. Oguadinma
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - Frank Schaper
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
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46
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Drouin F, Oguadinma PO, Whitehorne TJJ, Prud’homme RE, Schaper F. Lactide Polymerization with Chiral β-Diketiminate Zinc Complexes. Organometallics 2010. [DOI: 10.1021/om100154w] [Citation(s) in RCA: 149] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Frédéric Drouin
- Département de Chimie, Université de Montréal, 2900 Boulevard E.-Montpetit, Montréal, QC, H3T 1J4, Canada
| | - Paul O. Oguadinma
- Département de Chimie, Université de Montréal, 2900 Boulevard E.-Montpetit, Montréal, QC, H3T 1J4, Canada
| | - Todd J. J. Whitehorne
- Département de Chimie, Université de Montréal, 2900 Boulevard E.-Montpetit, Montréal, QC, H3T 1J4, Canada
| | - Robert E. Prud’homme
- Département de Chimie, Université de Montréal, 2900 Boulevard E.-Montpetit, Montréal, QC, H3T 1J4, Canada
| | - Frank Schaper
- Département de Chimie, Université de Montréal, 2900 Boulevard E.-Montpetit, Montréal, QC, H3T 1J4, Canada
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47
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Affiliation(s)
- Saïda Latreche
- 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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48
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El-Zoghbi I, Latreche S, Schaper F. Zirconium Complexes of Symmetric and of Chiral Diketiminate Ligands: Synthesis, Crystal Structures, and Reactivities. Organometallics 2010. [DOI: 10.1021/om900852y] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ibrahim El-Zoghbi
- Département de Chimie, Université de Montréal, Montréal, Québec, H3C 3J7, Canada
| | - Saïda Latreche
- 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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49
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Oguadinma PO, Rodrigue-Witchel A, Reber C, Schaper F. Intramolecular π-stacking in copper(i) diketiminate phenanthroline complexes. Dalton Trans 2010; 39:8759-68. [DOI: 10.1039/c0dt00240b] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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