1
|
Pandey PK, Patra M, Ranjan P, Kumar Pal N, Choudhary S, Bera JK. A Single Terminal [Ni II-OH] Catalyst for Direct Julia-Type Olefination and α-Alkylation Involving Sulfones and Alcohols. Chemistry 2024; 30:e202400337. [PMID: 38644351 DOI: 10.1002/chem.202400337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 04/08/2024] [Accepted: 04/21/2024] [Indexed: 04/23/2024]
Abstract
A terminal [NiII-OH] complex 1, supported by triflamide-functionalized NHC ligands, showed divergent reactivity for the reaction of sulfone with alcohol, contingent on base concentration, temperature, and time. Julia-type olefination of alcohols with sulfones was achieved using one equiv. of base, whereas lowering base loading to 0.5 equiv. afforded α-alkylated sulfones. Besides excellent substrate scope and selectivity, biologically active stilbene derivatives DMU-212, pinosylvin, resveratrol, and piceatannol were synthesized in high yield under Julia-type olefination conditions. An extensive array of controlled experiments and DFT calculations provide valuable insight on the reaction pathway.
Collapse
Affiliation(s)
- Prabhakar K Pandey
- Department of Chemistry and Centre for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Moumita Patra
- Department of Chemistry and Centre for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Prabodh Ranjan
- Department of Chemistry and Centre for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Nilay Kumar Pal
- Department of Chemistry and Centre for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Sanjay Choudhary
- Department of Chemistry and Centre for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Jitendra K Bera
- Department of Chemistry and Centre for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| |
Collapse
|
2
|
Park S, Seo MS, Kim M, Lee KM, Graham PM, Lee Y. Reactivity of low-valent nickel carbonyl species supported by acridane based PNP ligands towards iodoalkanes. Dalton Trans 2024; 53:10120-10125. [PMID: 38817194 DOI: 10.1039/d4dt01022a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2024]
Abstract
Nickel monocarbonyl species with Ni(I) and Ni(0) have been synthesized and fully characterized by employing an acriPNP-Ph pincer ligand having a -C(Ph)2- bridge moiety to tether two aromatic rings. To see the effect of the bridge moiety, these complexes were structurally compared with the previously studied nickel complexes supported by PNP and acriPNP-Me ligands and methylation of the nickel carbonyl species was particularly investigated. Since a Ni(I)-CO species is known to be one of the key intermediates during the C-C coupling reaction to give an acetyl species, according to the paramagnetic mechanism of acetyl coenzyme A synthase (ACS), their reactivity toward MeI has been examined. Methylation of a nickel(I)-CO species reveals enhanced C-C coupling when both acriPNP-Me and acriPNP-Ph ligands were used. According to spin density analysis calculated by density functional theory, all Ni(I)-CO species reveal similar spin density at nickel and the carbon atom of CO. X-ray crystallographic data suggest that the corresponding selectivity may be related to the steric influence. For both (acriPNP-Ph)Ni-CO (2) and (acriPNP-Me)Ni-CO (2'), the nickel(I) site is sterically well protected, leading to selective interaction with a methyl radical to give a nickel acyl product. Steric influence was marginally observed when an anionic {(acriPNP-R)Ni-CO}- (R = Me or Ph) species reacted with MeI. The corresponding C-C coupled product was also observed from the methylation of nickel(0)-CO species.
Collapse
Affiliation(s)
- Sanha Park
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea.
| | - Mi Sook Seo
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea.
| | - Mingi Kim
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Kang Mun Lee
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Peter M Graham
- Department of Chemistry, Saint Joseph's University, 5600 City Avenue, Philadelphia, PA 19131, USA
| | - Yunho Lee
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea.
| |
Collapse
|
3
|
Pavun A, Niess R, Scheibel LA, Seidl M, Hohloch S. A mesoionic carbene stabilized nickel(II) hydroxide complex: a facile precursor for C-H activation chemistry. Dalton Trans 2024; 53:2749-2761. [PMID: 38226674 DOI: 10.1039/d3dt03746k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2024]
Abstract
We report the synthesis of a new nickel(II) hydroxide complex 2 supported by a rigid, tridentate triazolylidene-carbazolid ligand. The complex can be accessed in high yields following a simple and stepwise extraction protocol using dichloromethane and aqueous ammonium chloride followed by aqeous sodium hydroxide solution. We found that complex 2 is highly basic, undergoing various deprotonation/desilylation reactions with E-H and C-H acidic and silylated compounds. In this context we synthesized a variety of novel, functionalized nickel(II) complexes with trimethylsilylolate (3), trityl sulfide (4), tosyl amide (5), azido (6), pyridine (7), acetylide (8, 9), fluoroarene (10 & 11) and enolate (12) ligands. We furthermore found that 2 reacts with malonic acid dimethyl ester in a knoevennagel-type condensation reaction, giving access to a new enolate ligand in complex 13, consisting of two malonic acid units. Furthermore, complex 2 reacts with acetonitrile to form the cyanido complex 14. The formation of complexes 13 and 14 is particularly interesting, as they underline the potential of complex 2 in both C-C bond formation and cleavage reactions.
Collapse
Affiliation(s)
- Anna Pavun
- Universität Innsbruck, Department of General, Inorganic and Theoretical Chemistry, Innrain 80-82, 6020 Innsbruck, Austria.
| | - Raffael Niess
- Universität Innsbruck, Department of General, Inorganic and Theoretical Chemistry, Innrain 80-82, 6020 Innsbruck, Austria.
| | - Lucas A Scheibel
- Universität Innsbruck, Department of General, Inorganic and Theoretical Chemistry, Innrain 80-82, 6020 Innsbruck, Austria.
| | - Michael Seidl
- Universität Innsbruck, Department of General, Inorganic and Theoretical Chemistry, Innrain 80-82, 6020 Innsbruck, Austria.
| | - Stephan Hohloch
- Universität Innsbruck, Department of General, Inorganic and Theoretical Chemistry, Innrain 80-82, 6020 Innsbruck, Austria.
| |
Collapse
|
4
|
Bermejo J, Ortega-Lepe I, Santos LL, Rendón N, López-Serrano J, Álvarez E, Suárez A. Nitrous oxide activation by picoline-derived Ni-CNP hydrides. Chem Commun (Camb) 2024; 60:1575-1578. [PMID: 38230654 DOI: 10.1039/d3cc05455a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
Oxygen atom transfer (OAT) from N2O to the Ni-H bond of proton-responsive picoline-derived CNP nickel complexes has been investigated both experimentally and theoretically. These Ni-CNP complexes efficiently catalyse the reduction of N2O with pinacolborane (HBpin) under mild conditions.
Collapse
Affiliation(s)
- José Bermejo
- Instituto de Investigaciones Químicas (IIQ) and Centro de Innovación en Química Avanzada (ORFEO-CINQA), CSIC-Universidad de Sevilla, Avda. Américo Vespucio 49, 41092, Sevilla, Spain.
| | - Isabel Ortega-Lepe
- Instituto de Investigaciones Químicas (IIQ) and Centro de Innovación en Química Avanzada (ORFEO-CINQA), CSIC-Universidad de Sevilla, Avda. Américo Vespucio 49, 41092, Sevilla, Spain.
| | - Laura L Santos
- Instituto de Investigaciones Químicas (IIQ) and Centro de Innovación en Química Avanzada (ORFEO-CINQA), CSIC-Universidad de Sevilla, Avda. Américo Vespucio 49, 41092, Sevilla, Spain.
| | - Nuria Rendón
- Instituto de Investigaciones Químicas (IIQ) and Centro de Innovación en Química Avanzada (ORFEO-CINQA), CSIC-Universidad de Sevilla, Avda. Américo Vespucio 49, 41092, Sevilla, Spain.
| | - Joaquín López-Serrano
- Instituto de Investigaciones Químicas (IIQ) and Centro de Innovación en Química Avanzada (ORFEO-CINQA), CSIC-Universidad de Sevilla, Avda. Américo Vespucio 49, 41092, Sevilla, Spain.
| | - Eleuterio Álvarez
- Instituto de Investigaciones Químicas (IIQ) and Centro de Innovación en Química Avanzada (ORFEO-CINQA), CSIC-Universidad de Sevilla, Avda. Américo Vespucio 49, 41092, Sevilla, Spain.
| | - Andrés Suárez
- Instituto de Investigaciones Químicas (IIQ) and Centro de Innovación en Química Avanzada (ORFEO-CINQA), CSIC-Universidad de Sevilla, Avda. Américo Vespucio 49, 41092, Sevilla, Spain.
| |
Collapse
|
5
|
Singh V, Jain H, Nath S, Adhikari D. Multielectron Redox Afforded by a Pincer Ligand Promoting Kumada Cross-Coupling Reactions. Chemistry 2023:e202303189. [PMID: 37988192 DOI: 10.1002/chem.202303189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 11/21/2023] [Accepted: 11/21/2023] [Indexed: 11/23/2023]
Abstract
The redox-active nature of a pincer has been exploited to conduct C-C cross-coupling reactions under mild conditions. A nickel complex with a NNN pincer was dimeric in the solid state, and the structure displayed a Ni2 N2 diamond core. In the dimeric structure, both ligand backbones house an electron, in the iminosemiquinonate form, to keep the metal's oxidation state at +2. In the presence of an aryl Grignard reagent, only 3 mol % loading the nickel complex generates a Kumada cross-coupled product in good yield from a wide variety of aryl-X (X= I, Br, Cl) substrates. That the ligand-based radical remains responsible for promoting such a coupling reaction following a radical pathway is suggested by TEMPO quenching. Furthermore, a radical-clock experiment along with tracing product distribution unambiguously supported the radical's involvement through the catalytic cycle. A series of thorough mechanistic probation, including computational DFT analysis, disclosed the cooperative action of both redox-active pincer ligand and the metal centre to drive the reaction.
Collapse
Affiliation(s)
- Vikramjeet Singh
- Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali, SAS Nagar, 140306, India
| | - Harshit Jain
- Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali, SAS Nagar, 140306, India
| | - Shounak Nath
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, United States
| | - Debashis Adhikari
- Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali, SAS Nagar, 140306, India
| |
Collapse
|
6
|
Stephens DN, Szilagyi RK, Roehling PN, Arulsamy N, Mock MT. Catalytic Ammonia Oxidation to Dinitrogen by a Nickel Complex. Angew Chem Int Ed Engl 2023; 62:e202213462. [PMID: 36279321 DOI: 10.1002/anie.202213462] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Indexed: 11/07/2022]
Abstract
We report a nickel complex for catalytic oxidation of ammonia to dinitrogen under ambient conditions. Using the aryloxyl radical 2,4,6-tri-tert-butylphenoxyl (t Bu3 ArO⋅) as a H atom acceptor to cleave the N-H bond of a coordinated NH3 ligand up to 56 equiv of N2 per Ni center can be generated. Employing the N-oxyl radical 2,2,6,6-(tetramethylpiperidin-1-yl)oxyl (TEMPO⋅) as the H-atom acceptor, up to 15 equiv of N2 per Ni center are formed. A bridging Ni-hydrazine product identified by isotopic nitrogen (15 N) studies and supported by computational models indicates the N-N bond forming step occurs by bimetallic homocoupling of two paramagnetic [Ni]-NH2 fragments. Ni-mediated hydrazine disproportionation to N2 and NH3 completes the catalytic cycle.
Collapse
Affiliation(s)
- David N Stephens
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, USA
| | - Robert K Szilagyi
- Department of Chemistry, University of British Columbia - Okanagan, Kelowna, British Columbia, Canada
| | - Paige N Roehling
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, USA
| | - Navamoney Arulsamy
- Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071, USA
| | - Michael T Mock
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, USA
| |
Collapse
|
7
|
Tannoux T, Auffrant A. Complexes featuring tridentate iminophosphorane ligands: Synthesis, reactivity, and catalysis. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
8
|
Tomomatsu K, Yamada Y, Koga Y, Matsubara K. Formation of Nickel(II) Cyanomethyl Complex Bearing Tridentate 1,2,3-Triazolylidene. CHEM LETT 2022. [DOI: 10.1246/cl.220232] [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)
- Kanta Tomomatsu
- Department of Chemistry, Fukuoka University, 8-19-1 Nanakuma, Fukuoka 814-0180
| | - Yuji Yamada
- Department of Chemistry, Fukuoka University, 8-19-1 Nanakuma, Fukuoka 814-0180
| | - Yuji Koga
- Department of Chemistry, Fukuoka University, 8-19-1 Nanakuma, Fukuoka 814-0180
| | - Kouki Matsubara
- Department of Chemistry, Fukuoka University, 8-19-1 Nanakuma, Fukuoka 814-0180
| |
Collapse
|
9
|
Ott JC, Bürgy D, Guan H, Gade LH. 3d Metal Complexes in T-shaped Geometry as a Gateway to Metalloradical Reactivity. Acc Chem Res 2022; 55:857-868. [PMID: 35164502 DOI: 10.1021/acs.accounts.1c00737] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
ConspectusLow-valent, low-coordinate 3d metal complexes represent a class of extraordinarily reactive compounds that can act as reagents and catalysts for challenging bond-activation reactions. The pursuit of these electron-deficient metal complexes in low oxidation states demands ancillary ligands capable of providing not only energetic stabilization but also sufficiently high steric bulk at the metal center. From this perspective, pincer ligands are particularly advantageous, as their prearranged, meridional coordination mode scaffolds the active center while the substituents of the peripheral donor atoms provide effective steric shielding for the coordination sphere. In a T-shaped geometry, the transition metal complexes possess a precisely defined vacant coordination site, which, combined with the often observed high-spin electron configuration, exhibits unusually high selectivity of these compounds with respect to one-electron redox chemistry. In light of the intractable reaction pathways typically observed with related electronically unsaturated 3d transition metal complexes, the pincer coordination mode enables the isolation of low-valent compounds with more controlled and unique reactivity. We have thus investigated a series of T-shaped metal(I) complexes using three different types of pincer ligands, which may be regarded as "metalloradicals" due to their selectively exposed unpaired electrons.These compounds display remarkably high thermal stability and represent rarely observed "naked" monovalent metal species featuring both monomeric and dimeric structures. Extensive reactivity studies using various organic substrates highlight a strong tendency of these paramagnetic compounds to undergo one-electron oxidation, leading to the isolation of a plethora of metal(II) species with reduced organic ligands as unusual structural elements. The exploration of C2 symmetric T-shaped Ni(I) complexes as asymmetric catalysts also shows success in enantioselective hydrodehalogenation of geminal dihalogenides. In addition, this specific class of low-valent, low-coordinate complexes can be further diversified by introducing redox-active pincer ligands or building homobimetallic systems with two T-shaped units.This Account focuses on the discussion of selected examples of iron, cobalt, and nickel pincer complexes bearing a [P,N,P] or [N,N,N] donor set; however, their electronic structure and radical-type reactivity can be broadly extended to other pincer systems. The availability of various types of pincer ligands should allow fine-tuning of the reactivity of the T-shaped complexes. Given the unprecedented reactivity observed with these compounds, we expect the studies of T-shaped 3d metal complexes to be a fertile field for advancing base metal catalysis.
Collapse
Affiliation(s)
- Jonas C. Ott
- Anorganisch-Chemisches Institut, Universität Heidelberg, 69120 Heidelberg, Germany
| | - David Bürgy
- Anorganisch-Chemisches Institut, Universität Heidelberg, 69120 Heidelberg, Germany
| | - Hairong Guan
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| | - Lutz H. Gade
- Anorganisch-Chemisches Institut, Universität Heidelberg, 69120 Heidelberg, Germany
| |
Collapse
|
10
|
Watt FA, Sieland B, Dickmann N, Schoch R, Herbst-Irmer R, Ott H, Paradies J, Kuckling D, Hohloch S. Coupling of CO 2 and epoxides catalysed by novel N-fused mesoionic carbene complexes of nickel(II). Dalton Trans 2021; 50:17361-17371. [PMID: 34788774 DOI: 10.1039/d1dt03311e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the syntheses of two rigid mesoionic carbene (MIC) ligands with a carbazole backbone via an intramolecular Finkelstein-cyclisation cascade and investigate their coordination behavior towards nickel(II) acetate. Despite the nickel(II) carbene complexes 4a,b showing only minor differences in their chemical composition, they display curious differences in their chemical properties, e.g. solubility. Furthermore, the potential of these novel MIC complexes in the coupling of carbon dioxide and epoxides as well as the differences in reactivity compared to classical NHC-derived complexes are evaluated.
Collapse
Affiliation(s)
- Fabian A Watt
- Paderborn University, Faculty of Science, Department of Chemistry, Warburger Straße 100, 33098 Paderborn, Germany
| | - Benedikt Sieland
- Paderborn University, Faculty of Science, Department of Chemistry, Warburger Straße 100, 33098 Paderborn, Germany
| | - Nicole Dickmann
- Paderborn University, Faculty of Science, Department of Chemistry, Warburger Straße 100, 33098 Paderborn, Germany
| | - Roland Schoch
- Paderborn University, Faculty of Science, Department of Chemistry, Warburger Straße 100, 33098 Paderborn, Germany
| | - Regine Herbst-Irmer
- University of Göttingen, Institute of Inorganic Chemistry, Tammannstraße 4, 37077 Göttingen, Germany
| | - Holger Ott
- Bruker AXS GmbH, Östliche Rheinbrückenstraße 49, 76187 Karlsruhe, Germany
| | - Jan Paradies
- Paderborn University, Faculty of Science, Department of Chemistry, Warburger Straße 100, 33098 Paderborn, Germany
| | - Dirk Kuckling
- Paderborn University, Faculty of Science, Department of Chemistry, Warburger Straße 100, 33098 Paderborn, Germany
| | - Stephan Hohloch
- University of Innsbruck, Faculty of Chemistry and Pharmacy, Institute of General, Inorganic and Theoretical Chemistry, Innrain 80-82, 6020 Innsbruck, Austria.
| |
Collapse
|
11
|
Park J, Cho M, Rhee YM, Jung Y. Theoretical Study on the Degree of CO 2 Activation in CO 2-Coordinated Ni(0) Complexes. ACS OMEGA 2021; 6:7646-7654. [PMID: 33778275 PMCID: PMC7992152 DOI: 10.1021/acsomega.0c06257] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 02/12/2021] [Indexed: 06/12/2023]
Abstract
The geometrical characteristic and the degree of CO2 activation of the CO2-coordinated Ni(0) complexes were investigated computationally by quantum chemical means for bidentate and tridentate ligands of PP, PPMeP, and PNP, and sometimes with co-complexing Fe(II) to differently coordinate CO2. We show that the coordination geometry of the central metal is determined by the ligand geometry. The charge and the energy decomposition analyses show that the charge transfer energy through orbital mixing has a strong correlation with CO2 net charge, while the binding energy cannot due to the lack of the coordination number and the deformation energy of the ligand. Among the examined ligands, PNP with negatively charged secondary amine makes Ni(0) an electron-rich atom, which results in an ∼20% higher CO2 activation than those of PP and PPMeP. In particular, Fe(II)-PNP in the CO2-bridged diatomic complex enhances CO2 activation by another ∼20%, partly through the inductive effect of Fe(II), which pulls electron density from Ni-PNP across the CO2-bridge and partly by the backward donation from Fe(II)-PNP. Therefore, the present study encourages us to design a strongly electron-donating ligand and a CO2-bridged diatomic complex to develop more efficient homogeneous catalyst.
Collapse
Affiliation(s)
- Joonho Park
- Department
of Chemistry, Korea Advanced Institute of
Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Moses Cho
- Neutron
Science Division, Korea Atomic Energy Research
Institute (KAERI), Daejeon 34057, Republic of Korea
| | - Young Min Rhee
- Department
of Chemistry, Korea Advanced Institute of
Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Yousung Jung
- Department
of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| |
Collapse
|
12
|
Gu NX, Oyala PH, Peters JC. Hydrazine Formation via Coupling of a Nickel(III)-NH 2 Radical. Angew Chem Int Ed Engl 2021; 60:4009-4013. [PMID: 33152166 PMCID: PMC7902478 DOI: 10.1002/anie.202013119] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Indexed: 12/12/2022]
Abstract
M(NHx ) intermediates involved in N-N bond formation are central to ammonia oxidation (AO) catalysis, an enabling technology to ultimately exploit ammonia (NH3 ) as an alternative fuel source. While homocoupling of a terminal amide species (M-NH2 ) to form hydrazine (N2 H4 ) has been proposed, well-defined examples are without precedent. Herein, we discuss the generation and electronic structure of a NiIII -NH2 species that undergoes bimolecular coupling to generate a NiII 2 (N2 H4 ) complex. This hydrazine adduct can be further oxidized to a structurally unusual Ni2 (N2 H2 ) species; this releases N2 in the presence of NH3 , thus establishing a synthetic cycle for Ni-mediated AO. Distribution of the redox load for H2 N-NH2 formation via NH2 coupling between two metal centers presents an attractive strategy for AO catalysis using Earth-abundant, late first-row metals.
Collapse
Affiliation(s)
- Nina X Gu
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Paul H Oyala
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Jonas C Peters
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125, USA
| |
Collapse
|
13
|
Gu NX, Oyala PH, Peters JC. Hydrazine Formation via Coupling of a Nickel(III)–NH
2
Radical. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202013119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Nina X. Gu
- Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
| | - Paul H. Oyala
- Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
| | - Jonas C. Peters
- Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
| |
Collapse
|
14
|
Xing X, Zhang S, Thierer LM, Gau MR, Carroll PJ, Tomson NC. Reversible nickel-metallacycle formation with a phosphinimine-based pincer ligand. Dalton Trans 2020; 49:7796-7806. [PMID: 32459241 PMCID: PMC7370460 DOI: 10.1039/d0dt01118e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pincer ligands have a remarkable ability to impart control over small molecule activation chemistry and catalytic activity; therefore, the design of new pincer ligands and the exploration of their reactivity profiles continues to be a frontier in synthetic inorganic chemistry. In this work, a novel, monoanionic NNN pincer ligand containing two phosphinimine donors was used to create a series of mononuclear Ni complexes. Ligand metallation in the presence of NaOPh yielded a nickel phenoxide complex that was used to form a mononuclear hydride complex on treatment with pinacolborane. Attempts at ligand metallation with NaN(SiMe3)2 resulted in the activation of both phosphinimine methyl groups to yield an anionic, cis-dialkyl product, in which dissociation of one phosphinimine nitrogen leads to retention of a square planar coordination environment about Ni. Protonolysis of this dialkyl species generated a monoalkyl product that retained the 4-membered metallacycle. The insertion of 2,6-dimethylphenyl isocyanide (xylNC) into this nickel metallacycle, followed by proton transfer, generated a new five-membered nickel metallacycle. Kinetic studies suggested rate-limiting proton transfer (KIE ≥ 3.9 ± 0.5) from the α-methylene unit of the putative iminoacyl intermediate.
Collapse
Affiliation(s)
- Xiujing Xing
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, PA 19104, USA.
| | | | | | | | | | | |
Collapse
|
15
|
Santiago TG, Urbaneja C, Álvarez E, Ávila E, Palma P, Cámpora J. Neutral, cationic and anionic organonickel and -palladium complexes supported by iminophosphine/phosphinoenaminato ligands. Dalton Trans 2020; 49:322-335. [PMID: 31802075 DOI: 10.1039/c9dt04062e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a series of organometallic nickel and palladium complexes containing iminophosphine ligands R2PCH2C(Ph) = N-Dipp (Dipp = 2,6-diisopropylphenyl; R = iPr, La; R = Ph, Lb; and R = o-C6H4OMe, Lc), synthesized by ligand exchange or oxidative addition reactions, and we investigate the capacity of such ligands to undergo reversible deprotonation to the corresponding phosphinoenaminato species. In the attempted ligand exchange reaction of the nickel bis(trimethylsilyl)methyl precursor [Ni(CH2SiMe3)2Py2] with Lb, the iminophosphine acts as a weak acid rather than a neutral ligand, cleaving one of the Ni-C bonds, to afford the phosphinoenaminato complex [Ni(CH2SiMe3)(L'b)(Py)] (L'b = conjugate base of Lb). We disclose a general method for the syntheses of complexes [Ni(CH2SiMe3)(L)(Py)]+ (L = La, Lb or Lc), and demonstrate that iminophosphine deprotonation is a general feature and occurs reversibly in the coordination sphere of the metal. By studying proton exchange reactions of the cation [Ni(CH2SiMe3)(Lb)(Py)]+ with bases of different strength we show that the conjugate phosphinoenaminato ligand in [Ni(CH2SiMe3)(L'b)(Py)] is a base with strength comparable to DBU in THF. The acyl group in the functionalized aryl complex [Ni(p-C6H4COCH3)(Br)(La)] does not interfere in the iminophosphine deprotonation with NaH. The latter reaction affords the unusual anionic hydroxide species [Ni(p-C6H4COCH3)(OH)(L'a)]-Na+, which was isolated and fully characterized.
Collapse
Affiliation(s)
- Tomás G Santiago
- Instituto de Investigaciones Químicas, CSIC-Universidad de Sevilla. CIC-Cartuja, c/Américo Vespucio, 49, 41092, Sevilla, Spain.
| | | | | | | | | | | |
Collapse
|
16
|
Metal-Ligand Cooperativity of Phosphorus-Containing Pincer Systems. TOP ORGANOMETAL CHEM 2020. [DOI: 10.1007/3418_2020_69] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
17
|
van der Vlugt JI. Redox-Active Pincer Ligands. TOP ORGANOMETAL CHEM 2020. [DOI: 10.1007/3418_2020_68] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
18
|
Kim J, Kim YE, Park K, Lee Y. A Silyl-Nickel Moiety as a Metal–Ligand Cooperative Site. Inorg Chem 2019; 58:11534-11545. [DOI: 10.1021/acs.inorgchem.9b01388] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jin Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Yeong-Eun Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Koeun Park
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Yunho Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| |
Collapse
|
19
|
The facile reaction of water with a bimetallic nickel tetrachloride tetraphosphine: A tale of two chelates. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.02.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
20
|
Eberhardt NA, Wellala NPN, Li Y, Krause JA, Guan H. Dehydrogenative Coupling of Aldehydes with Alcohols Catalyzed by a Nickel Hydride Complex. Organometallics 2019. [DOI: 10.1021/acs.organomet.8b00888] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nathan A. Eberhardt
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| | - Nadeesha P. N. Wellala
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| | - Yingze Li
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| | - Jeanette A. Krause
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| | - Hairong Guan
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| |
Collapse
|
21
|
Gudun KA, Segizbayev M, Adamov A, Plessow PN, Lyssenko KA, Balanay MP, Khalimon AY. POCN Ni(ii) pincer complexes: synthesis, characterization and evaluation of catalytic hydrosilylation and hydroboration activities. Dalton Trans 2019; 48:1732-1746. [DOI: 10.1039/c8dt04854a] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
(POCN)Ni(ii) complexes were found to mediate a variety of carbonyl hydroboration reactions, including chemoselective hydroboration of benzaldehyde and hydroborative reduction of amides.
Collapse
Affiliation(s)
- Kristina A. Gudun
- Department of Chemistry
- School of Science and Technology
- Nazarbayev University
- Astana 010000
- Kazakhstan
| | - Medet Segizbayev
- Department of Chemistry
- School of Science and Technology
- Nazarbayev University
- Astana 010000
- Kazakhstan
| | - Assyl Adamov
- Department of Chemistry
- School of Science and Technology
- Nazarbayev University
- Astana 010000
- Kazakhstan
| | - Philipp N. Plessow
- Institute of Catalysis Research and Technology (IKFT)
- D-76344 Eggenstein-Leopoldshafen
- Germany
| | - Konstantin A. Lyssenko
- Department of Chemistry
- M. V. Lomonosov Moscow State University
- Moscow 119991
- Russia
- Plekhanov Russian University of Economics
| | - Mannix P. Balanay
- Department of Chemistry
- School of Science and Technology
- Nazarbayev University
- Astana 010000
- Kazakhstan
| | - Andrey Y. Khalimon
- Department of Chemistry
- School of Science and Technology
- Nazarbayev University
- Astana 010000
- Kazakhstan
| |
Collapse
|
22
|
Anderson NH, Boncella JM, Tondreau AM. Investigation of Nitrile Hydration Chemistry by Two Transition Metal Hydroxide Complexes: Mn–OH and Ni–OH Nitrile Insertion Chemistry. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00687] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Nickolas H. Anderson
- Chemistry Division, Los Alamos National Laboratory, MS J514, Los Alamos, New Mexico 87545, United States
| | - James M. Boncella
- Chemistry Division, Los Alamos National Laboratory, MS J514, Los Alamos, New Mexico 87545, United States
| | - Aaron M. Tondreau
- Chemistry Division, Los Alamos National Laboratory, MS J514, Los Alamos, New Mexico 87545, United States
| |
Collapse
|
23
|
Wang D, Ekanayake DM, Lindeman SV, Verani CN, Fiedler AT. Multielectron Redox Chemistry of Transition Metal Complexes Supported by a Non‐Innocent N
3
P
2
Ligand: Synthesis, Characterization, and Catalytic Properties. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Denan Wang
- Department of Chemistry Marquette University 53201 Milwaukee Wisconsin United States
| | - Danushka M. Ekanayake
- Department of Chemistry Wayne State University 5101 Cass Ave 48202 Detroit MI United States
| | - Sergey V. Lindeman
- Department of Chemistry Marquette University 53201 Milwaukee Wisconsin United States
| | - Cláudio N. Verani
- Department of Chemistry Wayne State University 5101 Cass Ave 48202 Detroit MI United States
| | - Adam T. Fiedler
- Department of Chemistry Marquette University 53201 Milwaukee Wisconsin United States
| |
Collapse
|
24
|
Yao C, Chakraborty P, Aresu E, Li H, Guan C, Zhou C, Liang LC, Huang KW. Monomeric nickel hydroxide stabilized by a sterically demanding phosphorus–nitrogen PN3P-pincer ligand: synthesis, reactivity and catalysis. Dalton Trans 2018; 47:16057-16065. [DOI: 10.1039/c8dt03403f] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Various new nickel complexes and amides are synthesized using monomeric nickel hydroxide (PN3P)Ni(OH) (3) as the precursor or catalyst.
Collapse
Affiliation(s)
- Changguang Yao
- KAUST Catalysis Center and Division of Physical Sciences and Engineering
- King Abdullah University of Science and Technology
- Thuwal 23955-6900
- Saudi Arabia
| | - Priyanka Chakraborty
- KAUST Catalysis Center and Division of Physical Sciences and Engineering
- King Abdullah University of Science and Technology
- Thuwal 23955-6900
- Saudi Arabia
| | - Emanuele Aresu
- KAUST Catalysis Center and Division of Physical Sciences and Engineering
- King Abdullah University of Science and Technology
- Thuwal 23955-6900
- Saudi Arabia
| | - Huaifeng Li
- KAUST Catalysis Center and Division of Physical Sciences and Engineering
- King Abdullah University of Science and Technology
- Thuwal 23955-6900
- Saudi Arabia
| | - Chao Guan
- KAUST Catalysis Center and Division of Physical Sciences and Engineering
- King Abdullah University of Science and Technology
- Thuwal 23955-6900
- Saudi Arabia
| | - Chunhui Zhou
- KAUST Catalysis Center and Division of Physical Sciences and Engineering
- King Abdullah University of Science and Technology
- Thuwal 23955-6900
- Saudi Arabia
| | - Lan-Chang Liang
- Department of Chemistry
- National Sun Yat-sen University
- Kaohsiung 80424
- Taiwan
- Department of Medicinal and Applied Chemistry
| | - Kuo-Wei Huang
- KAUST Catalysis Center and Division of Physical Sciences and Engineering
- King Abdullah University of Science and Technology
- Thuwal 23955-6900
- Saudi Arabia
| |
Collapse
|
25
|
Yoo C, Lee Y. A T-Shaped Nickel(I) Metalloradical Species. Angew Chem Int Ed Engl 2017; 56:9502-9506. [PMID: 28556527 DOI: 10.1002/anie.201704487] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Indexed: 12/11/2022]
Abstract
A T-shaped NiI complex was synthesized using a rigid acridane-based pincer ligand to prepare a metalloradical center. Structural data displays a nickel ion is embedded in the plane of a PNP ligand. Having a sterically exposed half-filled dx2-y2 orbital, this three-coordinate NiI species reveals unique open-shell reactivity including the homolytic cleavage of various σ-bonds, such as H-H, N-N, and C-C.
Collapse
Affiliation(s)
- Changho Yoo
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Yunho Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| |
Collapse
|
26
|
Affiliation(s)
- Changho Yoo
- Department of Chemistry; Korea Advanced Institute of Science and Technology (KAIST); 291 Daehak-ro, Yuseong-gu Daejeon 34141 Republic of Korea
| | - Yunho Lee
- Department of Chemistry; Korea Advanced Institute of Science and Technology (KAIST); 291 Daehak-ro, Yuseong-gu Daejeon 34141 Republic of Korea
| |
Collapse
|
27
|
Kim J, Park K, Lee Y. Synthesis and characterization of a four-coordinate nickel carbamato species (MeSiP i Pr 2 )Ni(OC(O)NHMes) generated from the reaction of (MeSiP i Pr 2 )Ni(NHMes) with CO 2. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2016.08.042] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
28
|
Lau N, Sano Y, Ziller JW, Borovik AS. Terminal Ni II-OH/-OH 2 complexes in trigonal bipyramidal geometries derived from H 2O. Polyhedron 2017; 125:179-185. [PMID: 29170577 PMCID: PMC5695699 DOI: 10.1016/j.poly.2016.11.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The preparation and characterization of two NiII complexes are described, a terminal NiII-OH complex with the tripodal ligand tris[(N)-tertbutylureaylato)-N-ethyl)]aminato ([H3buea]3-) and a terminal Ni II-OH2 complex with the tripodal ligand N,N',N″-[2,2',2″-nitrilotris(ethane-2,1-diyl)]tris(2,4,6-trimethylbenzenesulfonamido) ([MST]3-). For both complexes, the source of the -OH and -OH2 ligand is water. The salts K2[NiIIH3buea(OH)] and NMe4[NiIIMST(OH2)] were characterized using perpendicular-mode X-band electronic paramagnetic resonance, Fourier transform infrared, UV-visible spectroscopies, and its electrochemical properties were evaluated using cyclic voltammetry. The solid state structures of these complexes determined by X-ray diffraction methods reveal that they adopt a distorted trigonal bipyramidal geometry, an unusual structure for 5-coordinate NiII complexes. Moreover, the NiII-OH and NiII-OH2 units form intramolecular hydrogen bonding networks with the [H3buea]3- and [MST]3- ligands. The oxidation chemistry of these complexes was explored by treating the high-spin NiII compounds with one-electron oxidants. Species were formed with S = 1/2 spin ground states that are consistent with formation of monomeric NiIII species. While the formation of NiIII-OH complexes cannot be ruled out, the lack of observable O-H vibrations from the putative Ni-OH units suggest the possibility that other high valent Ni species are formed.
Collapse
Affiliation(s)
- Nathanael Lau
- Department of Chemistry, University of California - Irvine, 1102 Natural Sciences II, Irvine, CA 92697-2025, United States
| | - Yohei Sano
- Department of Chemistry, University of California - Irvine, 1102 Natural Sciences II, Irvine, CA 92697-2025, United States
| | - Joseph W Ziller
- Department of Chemistry, University of California - Irvine, 1102 Natural Sciences II, Irvine, CA 92697-2025, United States
| | - A S Borovik
- Department of Chemistry, University of California - Irvine, 1102 Natural Sciences II, Irvine, CA 92697-2025, United States
| |
Collapse
|
29
|
Wenz J, Kochan A, Wadepohl H, Gade LH. A Readily Accessible Chiral NNN Pincer Ligand with a Pyrrole Backbone and Its Ni(II) Chemistry: Syntheses, Structural Chemistry, and Bond Activations. Inorg Chem 2017; 56:3631-3643. [DOI: 10.1021/acs.inorgchem.7b00077] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Jan Wenz
- Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Alexander Kochan
- Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Lutz H. Gade
- Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| |
Collapse
|
30
|
Zimmermann P, Limberg C. Activation of Small Molecules at Nickel(I) Moieties. J Am Chem Soc 2017; 139:4233-4242. [DOI: 10.1021/jacs.6b12434] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Philipp Zimmermann
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | - Christian Limberg
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| |
Collapse
|
31
|
Lin CY, Power PP. Complexes of Ni(i): a “rare” oxidation state of growing importance. Chem Soc Rev 2017; 46:5347-5399. [DOI: 10.1039/c7cs00216e] [Citation(s) in RCA: 125] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The synthesis and diverse structures, reactivity (small molecule activation and catalysis) and magnetic properties of Ni(i) complexes are summarized.
Collapse
Affiliation(s)
- Chun-Yi Lin
- Department of Chemistry
- University of California
- Davis
- USA
| | | |
Collapse
|
32
|
Pelties S, Carter E, Folli A, Mahon MF, Murphy DM, Whittlesey MK, Wolf R. Influence of Ring-Expanded N-Heterocyclic Carbenes on the Structures of Half-Sandwich Ni(I) Complexes: An X-ray, Electron Paramagnetic Resonance (EPR), and Electron Nuclear Double Resonance (ENDOR) Study. Inorg Chem 2016; 55:11006-11017. [PMID: 27731984 DOI: 10.1021/acs.inorgchem.6b01540] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Potassium graphite reduction of the half-sandwich Ni(II) ring-expanded diamino/diamidocarbene complexes CpNi(RE-NHC)Br gave the Ni(I) derivatives CpNi(RE-NHC) (where RE-NHC = 6-Mes (1), 7-Mes (2), 6-MesDAC (3)) in yields of 40%-50%. The electronic structures of paramagnetic 1-3 were investigated by CW X-/Q-band electron paramagnetic resonance (EPR) and Q-band 1H electron nuclear double resonance (ENDOR) spectroscopy. While small variations in the g-values were observed between the diaminocarbene complexes 1 and 2, pronounced changes in the g-values were detected between the almost isostructural species (1) and diamidocarbene species (3). These results highlight the sensitivity of the EPR g-tensor to changes in the electronic structure of the Ni(I) centers generated by incorporation of heteroatom substituents onto the backbone ring positions. Variable-temperature EPR analysis also revealed the presence of a second Ni(I) site in 3. The experimental g-values for these two Ni(I) sites detected by EPR in frozen solutions of 3 are consistent with resolution on the EPR time scale of the disordered components evident in the X-ray crystallographically determined structure and the corresponding density functional theory (DFT)-calculated g-tensor. Q-band 1H ENDOR measurements revealed a small amount of unpaired electron spin density on the Cp rings, consistent with the calculated SOMO of complexes 1-3. The magnitude of the 1H A values for 3 were also notably larger, compared to 1 and 2, again highlighting the influence of the diamidocarbene on the electronic properties of 3.
Collapse
Affiliation(s)
- Stefan Pelties
- Institute of Inorganic Chemistry, University of Regensburg , 93040 Regensburg, Germany
| | - Emma Carter
- School of Chemistry, Cardiff University , Park Place, Cardiff CF10 3AT, United Kingdom
| | - Andrea Folli
- School of Chemistry, Cardiff University , Park Place, Cardiff CF10 3AT, United Kingdom
| | - Mary F Mahon
- Department of Chemistry, University of Bath , Claverton Down, Bath BA2 7AY, United Kingdom
| | - Damien M Murphy
- School of Chemistry, Cardiff University , Park Place, Cardiff CF10 3AT, United Kingdom
| | - Michael K Whittlesey
- Department of Chemistry, University of Bath , Claverton Down, Bath BA2 7AY, United Kingdom
| | - Robert Wolf
- Institute of Inorganic Chemistry, University of Regensburg , 93040 Regensburg, Germany
| |
Collapse
|
33
|
Corona T, Company A. Spectroscopically Characterized Synthetic Mononuclear Nickel-Oxygen Species. Chemistry 2016; 22:13422-9. [PMID: 27484613 DOI: 10.1002/chem.201602414] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Indexed: 11/07/2022]
Abstract
Iron, copper, and manganese are the predominant metals found in oxygenases that perform efficient and selective hydrocarbon oxidations and for this reason, a large number of the corresponding metal-oxygen species has been described. However, in recent years nickel has been found in the active site of enzymes involved in oxidation processes, in which nickel-dioxygen species are proposed to play a key role. Owing to this biological relevance and to the existence of different catalytic protocols that involve the use of nickel catalysts in oxidation reactions, there is a growing interest in the detection and characterization of nickel-oxygen species relevant to these processes. In this Minireview the spectroscopically/structurally characterized synthetic superoxo, peroxo, and oxonickel species that have been reported to date are described. From these studies it becomes clear that nickel is a very promising metal in the field of oxidation chemistry with still unexplored possibilities.
Collapse
Affiliation(s)
- Teresa Corona
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, 17003, Girona, Catalonia, Spain
| | - Anna Company
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, 17003, Girona, Catalonia, Spain.
| |
Collapse
|
34
|
Neeve EC, Geier SJ, Mkhalid IAI, Westcott SA, Marder TB. Diboron(4) Compounds: From Structural Curiosity to Synthetic Workhorse. Chem Rev 2016; 116:9091-161. [PMID: 27434758 DOI: 10.1021/acs.chemrev.6b00193] [Citation(s) in RCA: 730] [Impact Index Per Article: 91.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Although known for over 90 years, only in the past two decades has the chemistry of diboron(4) compounds been extensively explored. Many interesting structural features and reaction patterns have emerged, and more importantly, these compounds now feature prominently in both metal-catalyzed and metal-free methodologies for the formation of B-C bonds and other processes.
Collapse
Affiliation(s)
- Emily C Neeve
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Würzburg 97074, Germany
| | - Stephen J Geier
- Mount Allison University , Department of Biochemistry and Chemistry, Sackville, New Brunswick E4L 1G8, Canada
| | | | - Stephen A Westcott
- Mount Allison University , Department of Biochemistry and Chemistry, Sackville, New Brunswick E4L 1G8, Canada
| | - Todd B Marder
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Würzburg 97074, Germany
| |
Collapse
|
35
|
Jansa J, Řezníček T, Dostál L, Růžičková Z, Bureš F, Jambor R. Amidophosphine-stabilized palladium complexes catalyse Suzuki-Miyaura cross-couplings in aqueous media. Appl Organomet Chem 2016. [DOI: 10.1002/aoc.3539] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Josef Jansa
- Research Institute for Organic Syntheses (VUOS); Rybitví 296 CZ-533 54 Pardubice-Rybitví Czech Republic
| | - Tomáš Řezníček
- Research Institute for Organic Syntheses (VUOS); Rybitví 296 CZ-533 54 Pardubice-Rybitví Czech Republic
| | - Libor Dostál
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology; University of Pardubice; Studentská 573 CZ-532 10 Pardubice Czech Republic
| | - Zdena Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology; University of Pardubice; Studentská 573 CZ-532 10 Pardubice Czech Republic
| | - Filip Bureš
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology; University of Pardubice; Studentská 573 CZ-532 10 Pardubice Czech Republic
| | - Roman Jambor
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology; University of Pardubice; Studentská 573 CZ-532 10 Pardubice Czech Republic
| |
Collapse
|
36
|
Yoo C, Lee Y. Formation of a tetranickel octacarbonyl cluster from the CO2 reaction of a zero-valent nickel monocarbonyl species. Inorg Chem Front 2016. [DOI: 10.1039/c6qi00011h] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The CO2 reaction of a nickel(0) complex involves multiple reaction pathways including tetranickel cluster formation via reductive disproportionation of CO2.
Collapse
Affiliation(s)
- Changho Yoo
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 305-701
- Republic of Korea
- Center for Catalytic Hydrocarbon Functionalization
| | - Yunho Lee
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 305-701
- Republic of Korea
- Center for Catalytic Hydrocarbon Functionalization
| |
Collapse
|
37
|
Liu CC, Liu QL, Wu ZY, Chen YC, Xie HJ, Lei QF, Fang WJ. Mechanistic insights into small molecule activation induced by ligand cooperativity in PCcarbeneP nickel pincer complexes: a quantum chemistry study. J Mol Model 2015; 21:242. [DOI: 10.1007/s00894-015-2792-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Accepted: 08/13/2015] [Indexed: 12/22/2022]
|
38
|
Wang D, Lindeman SV, Fiedler AT. Bimetallic Complexes Supported by a Redox-Active Ligand with Fused Pincer-Type Coordination Sites. Inorg Chem 2015; 54:8744-54. [PMID: 26280846 DOI: 10.1021/acs.inorgchem.5b01380] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The remarkable chemistry of mononuclear complexes featuring tridentate, meridionally chelating "pincer" ligands has stimulated the development of ligand frameworks containing multiple pincer sites. Here, the coordination chemistry of a novel pentadentate ligand (L(N3O2)) that provides two closely spaced NNO pincer-type compartments fused together at a central diarylamido unit is described. The trianionic L(N3O2) chelate supports homobimetallic structures in which each M(II) ion (M = Co, Cu, Zn) is bound in a meridional fashion by the bridging diarylamido N atom and O,N-donors of the salicyaldimine arms. The metal centers are also coordinated by a mono- or bidentate auxiliary ligand (L(aux)), resulting in complexes with the general form [M2(L(N3O2))(L(aux))2](+) (where L(aux) = 1-methyl-benzimidazole (1MeBI), 2,2'-bipyridine (bpy), 4,4'-dibromo-2,2'-bipyridine (bpy(Br2)), or (S)-2-(4-isopropyl-4,5-dihydrooxazolyl)pyridine (S-(iPr)OxPy)). The fused nature of the NNO pincer sites results in short metal-metal distances ranging from 2.70 Å for [Co2(L(N3O2)) (bpy)2](+) to 3.28 Å for [Zn2(L(N3O2)) (bpy)2](+), as revealed by X-ray crystallography. The complexes possess C2 symmetry due to the twisting of the aryl rings of the μ-NAr2 core; spectroscopic studies indicate that chiral L(aux) ligands, such as S-(iPr)OxPy, are capable of controlling the helical sense of the L(N3O2) scaffold. Since the four- or five-coordinate M(II) centers are linked solely by the amido moiety, each features an open coordination site in the intermetallic region, allowing for the possibility of metal-metal cooperativity in small-molecule activation. Indeed, the dicobalt(II) complex [Co2(L(N3O2)) (bpy(Br2))2](+) reacts with O2 to yield a dicobalt(III) species with a μ-1,2-peroxo ligand. The bpy-containing complexes exhibit rich electrochemical properties due to multiple metal- and ligand-based redox events across a wide (3.0 V) potential window. Using electron paramagnetic resonance (EPR) spectroscopy and density functional theory (DFT), it was determined that one-electron oxidation of [Co2(L(N3O2)) (bpy)2](+) results in formation of a S = 1/2 species with a L(N3O2)-based radical coupled to low-spin Co(II) centers.
Collapse
Affiliation(s)
- Denan Wang
- Department of Chemistry, Marquette University , Milwaukee, Wisconsin 53201, United States
| | - Sergey V Lindeman
- Department of Chemistry, Marquette University , Milwaukee, Wisconsin 53201, United States
| | - Adam T Fiedler
- Department of Chemistry, Marquette University , Milwaukee, Wisconsin 53201, United States
| |
Collapse
|
39
|
Vreeken V, Siegler MA, de Bruin B, Reek JNH, Lutz M, van der Vlugt JI. CH Activation of Benzene by a Photoactivated NiII(azide): Formation of a Transient Nickel Nitrido Complex. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201501437] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
40
|
Vreeken V, Siegler MA, de Bruin B, Reek JNH, Lutz M, van der Vlugt JI. C-H Activation of Benzene by a Photoactivated Ni(II)(azide): Formation of a Transient Nickel Nitrido Complex. Angew Chem Int Ed Engl 2015; 54:7055-9. [PMID: 25925657 DOI: 10.1002/anie.201501437] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 03/27/2015] [Indexed: 11/08/2022]
Abstract
Photochemical activation of nickel-azido complex 2 [Ni(N3)(PNP)] (PN(H)P=2,2'-di(isopropylphosphino)-4,4'-ditolylamine) in neat benzene produces diamagnetic complex 3 [Ni(Ph)(PN(P)N(H))], which is crystallographically characterized. DFT calculations support photoinitiated N2-loss of the azido complex to generate a rare, transient Ni(IV) nitrido species, which bears significant nitridyl radical character. Subsequent trapping of this nitrido through insertion into the Ni-P bond generates a coordinatively unsaturated Ni(II) imidophosphorane P=N donor. This species shows unprecedented reactivity toward 1,2-addition of a C-H bond of benzene to form 3. The structurally characterized chlorido complex 4 [Ni(Cl)(PN(P)N(H))] is generated by reaction of 3 with HCl or by direct photolysis of 2 in chlorobenzene. This is the first report of aromatic C-H bond activation by a trapped transient nitrido species of a late transition metal.
Collapse
Affiliation(s)
- Vincent Vreeken
- Homogeneous, Bioinspired & Supramolecular Catalysis van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam (The Netherlands)
| | - Maxime A Siegler
- Department of Chemistry, John Hopkins University, 3400 N Charles Street, Baltimore, MD 21218 (USA)
| | - Bas de Bruin
- Homogeneous, Bioinspired & Supramolecular Catalysis van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam (The Netherlands)
| | - Joost N H Reek
- Homogeneous, Bioinspired & Supramolecular Catalysis van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam (The Netherlands)
| | - Martin Lutz
- Department of Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht (The Netherlands)
| | - Jarl Ivar van der Vlugt
- Homogeneous, Bioinspired & Supramolecular Catalysis van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam (The Netherlands).
| |
Collapse
|
41
|
Koch F, Schubert H, Sirsch P, Berkefeld A. Binuclear complexes of Ni(i) from 4-terphenyldithiophenol. Dalton Trans 2015; 44:13315-24. [DOI: 10.1039/c5dt01178g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The preparation and characterisation of binuclear Ni(i) complexes from a 4-terphenyldithiophenol ligand is described.
Collapse
Affiliation(s)
- Felix Koch
- Institut für Anorganische Chemie
- Eberhard Karls Universität Tübingen
- 72076 Tübingen
- Germany
| | - Hartmut Schubert
- Institut für Anorganische Chemie
- Eberhard Karls Universität Tübingen
- 72076 Tübingen
- Germany
| | - Peter Sirsch
- Institut für Anorganische Chemie
- Eberhard Karls Universität Tübingen
- 72076 Tübingen
- Germany
| | - Andreas Berkefeld
- Institut für Anorganische Chemie
- Eberhard Karls Universität Tübingen
- 72076 Tübingen
- Germany
| |
Collapse
|
42
|
Borau-Garcia J, Gutsulyak DV, Burford RJ, Piers WE. Selective hydration of nitriles to amides catalysed by PCP pincer supported nickel(ii) complexes. Dalton Trans 2015; 44:12082-5. [DOI: 10.1039/c4dt03902e] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Nickel(ii) hydroxo compounds supported by an electron rich PCP pincer ligand are active catalysts for the selective hydration of a variety of nitriles at low catalyst loadings and mild conditions.
Collapse
Affiliation(s)
| | | | - R. J. Burford
- Department of Chemistry
- University of Calgary
- Calgary
- Canada
| | - W. E. Piers
- Department of Chemistry
- University of Calgary
- Calgary
- Canada
| |
Collapse
|
43
|
Westcott SA, Fernández E. Singular Metal Activation of Diboron Compounds. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2015. [DOI: 10.1016/bs.adomc.2015.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
44
|
Hewage JS, Wanniarachchi S, Morin TJ, Liddle BJ, Banaszynski M, Lindeman SV, Bennett B, Gardinier JR. Homoleptic nickel(II) complexes of redox-tunable pincer-type ligands. Inorg Chem 2014; 53:10070-84. [PMID: 25222027 PMCID: PMC5047063 DOI: 10.1021/ic500657e] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Different synthetic methods have been developed to prepare eight new redox-active pincer-type ligands, H(X,Y), that have pyrazol-1-yl flanking donors attached to an ortho-position of each ring of a diarylamine anchor and that have different groups, X and Y, at the para-aryl positions. Together with four previously known H(X,Y) ligands, a series of 12 Ni(X,Y)2 complexes were prepared in high yields by a simple one-pot reaction. Six of the 12 derivatives were characterized by single-crystal X-ray diffraction, which showed tetragonally distorted hexacoordinate nickel(II) centers. The nickel(II) complexes exhibit two quasi-reversible one-electron oxidation waves in their cyclic voltammograms, with half-wave potentials that varied over a remarkable 700 mV range with the average of the Hammett σ(p) parameters of the para-aryl X, Y groups. The one- and two-electron oxidized derivatives [Ni(Me,Me)2](BF4)n (n = 1, 2) were prepared synthetically, were characterized by X-band EPR, electronic spectroscopy, and single-crystal X-ray diffraction (for n = 2), and were studied computationally by DFT methods. The dioxidized complex, [Ni(Me,Me)2](BF4)2, is an S = 2 species, with nickel(II) bound to two ligand radicals. The mono-oxidized complex [Ni(Me,Me)2](BF4), prepared by comproportionation, is best described as nickel(II) with one ligand centered radical. Neither the mono- nor the dioxidized derivative shows any substantial electronic coupling between the metal and their bound ligand radicals because of the orthogonal nature of their magnetic orbitals. On the other hand, weak electronic communication occurs between ligands in the mono-oxidized complex as evident from the intervalence charge transfer (IVCT) transition found in the near-IR absorption spectrum. Band shape analysis of the IVCT transition allowed comparisons of the strength of the electronic interaction with that in the related, previously known, Robin-Day class II mixed valence complex, [Ga(Me,Me)2](2+).
Collapse
Affiliation(s)
- Jeewantha S. Hewage
- Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53201-1881, United States
| | - Sarath Wanniarachchi
- Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53201-1881, United States
| | - Tyler J. Morin
- Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53201-1881, United States
| | - Brendan J. Liddle
- Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53201-1881, United States
| | - Megan Banaszynski
- Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53201-1881, United States
| | - Sergey V. Lindeman
- Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53201-1881, United States
| | - Brian Bennett
- Department of Biophysics, Medical College of Wisconsin, Milwaukee, Wisconsin 53226, United States
| | - James R. Gardinier
- Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53201-1881, United States
| |
Collapse
|
45
|
Venkanna GT, Arman HD, Tonzetich ZJ. Catalytic C–S Cross-Coupling Reactions Employing Ni Complexes of Pyrrole-Based Pincer Ligands. ACS Catal 2014. [DOI: 10.1021/cs500874z] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Gopaladasu T. Venkanna
- Department of Chemistry, University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Hadi D. Arman
- Department of Chemistry, University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Zachary J. Tonzetich
- Department of Chemistry, University of Texas at San Antonio, San Antonio, Texas 78249, United States
| |
Collapse
|
46
|
Hounjet LJ, Adhikari D, Pink M, Carroll PJ, Mindiola DJ. Synthesis of an Iron(II) Ethyl Complex Accompanied by Formation of an Unusual Dinitrogen-Ligated Iron(I) Hydride. Z Anorg Allg Chem 2014. [DOI: 10.1002/zaac.201400173] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
47
|
Wu J, Nova A, Balcells D, Brudvig GW, Dai W, Guard LM, Hazari N, Lin PH, Pokhrel R, Takase MK. Nickel(I) Monomers and Dimers with Cyclopentadienyl and Indenyl Ligands. Chemistry 2014; 20:5327-37. [DOI: 10.1002/chem.201305021] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2013] [Revised: 01/28/2014] [Indexed: 11/10/2022]
|
48
|
Yoo C, Oh S, Kim J, Lee Y. Transmethylation of a four-coordinate nickel(i) monocarbonyl species with methyl iodide. Chem Sci 2014. [DOI: 10.1039/c4sc01089b] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The reaction of a nickel(i) carbonyl species with CH3I revealed the formation of (PNP)NiCOCH3 which differs from its zerovalent congener.
Collapse
Affiliation(s)
- Changho Yoo
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 305-701, Republic of Korea
| | - Seohee Oh
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 305-701, Republic of Korea
| | - Jin Kim
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 305-701, Republic of Korea
| | - Yunho Lee
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 305-701, Republic of Korea
| |
Collapse
|
49
|
Yoo C, Kim J, Lee Y. Synthesis and Reactivity of Nickel(II) Hydroxycarbonyl Species, NiCOOH-κC. Organometallics 2013. [DOI: 10.1021/om400881j] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Changho Yoo
- Department
of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
| | - Jin Kim
- Department
of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
| | - Yunho Lee
- Department
of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
| |
Collapse
|
50
|
Gutsulyak DV, Piers WE, Borau-Garcia J, Parvez M. Activation of water, ammonia, and other small molecules by PC(carbene)P nickel pincer complexes. J Am Chem Soc 2013; 135:11776-9. [PMID: 23906261 DOI: 10.1021/ja406742n] [Citation(s) in RCA: 195] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Nickel complexes of a PC(carbene)P pincer ligand framework are described. Dehydrobromination of the precursor (PC(sp)(3)P)NiBr in the presence of a donor (PPh3 or NC(t)Bu) leads to the title complexes, which feature a rare nickel-carbene linkage as the pincer ligand anchor point. This strongly donating, nucleophilic carbene center engages in a variety of E-H bond activations (E = H, C, N, O), some of which are reversible. This represents a new mode of bond activation by ligand cooperativity in nickel pincer complexes.
Collapse
Affiliation(s)
- Dmitry V Gutsulyak
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada, T2N 1N4
| | | | | | | |
Collapse
|