1
|
Ketcham HE, Bennett MT, Reid CW, Gunnoe TB. Advances in arene alkylation and alkenylation catalyzed by transition metal complexes based on ruthenium, nickel, palladium, platinum, rhodium and iridium. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2023. [DOI: 10.1016/bs.adomc.2023.01.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
|
2
|
Synthesis and Characterization of Catecholato Copper(II) Complexes with Sterically Hindered Neutral and Anionic N3 Type Ligands: Tris(3,5-diisopropyl-1-pyrazolyl)methane and Hydrotris(3,5-diisopropyl-1-pyrazolyl)borate. INORGANICS 2020. [DOI: 10.3390/inorganics8050037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Three catecholato copper(II) complexes, [Cu(catCl4)(L1′)], [Cu(catBr4)(L1′)], and [Cu(catCl4)(L1H)], supported by sterically hindered neutral and anionic N3 type ligands: tris(3,5-diisopropyl-1-pyrazolyl)methane (referred to as L1′) and hydrotris(3,5-diisopropyl-1-pyrazolyl)borate (referred to as L1−), are synthesized and characterized in detail. Their X-ray structures reveal that both [Cu(catCl4)(L1′)] and [Cu(catBr4)(L1′)] complexes have a five-coordinate square-pyramidal geometry and [Cu(catCl4)(L1H)] complex has a four-coordinate square-planar geometry. The L1H is unusual protonated ligand that controls its overall charge. For the three catecholato copper(II) complexes, the oxidation state of copper is divalent, and catechol exists in catecholate as two minus anion. This difference in coordination geometry affects their d-d and CT transitions energy and ESR parameters.
Collapse
|
3
|
Warden E, Bartolotti L, Huo S, Li Y. Theoretical Probe to the Mechanism of Pt-Catalyzed C-H Acylation Reaction: Possible Pathways for the Acylation Reaction of a Platinacycle. Inorg Chem 2020; 59:555-562. [PMID: 31834795 DOI: 10.1021/acs.inorgchem.9b02835] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Density functional theory (DFT) and nudged elastic band (NEB) theory have been used to study the possible pathways for the acylation of cycloplatinated complex A derived from 2-phenoxypyridine, which is conceived as the key step in the platinum-catalyzed acylation of 2-aryloxypyridines. Geometry optimization indicates that the previously proposed intermediate, an arenium ion species as a result of analogous aromatic substitution, is not an energy minimum, but rather cationic Pt-arene η2-complex E is obtained as a stable intermediate. NEB simulations suggest that the minimum energy pathway for the acylation reaction has energy barrier of 33.6 kcal/mol and consists of the following steps: (1) Nucleophilic substitution at acetyl chloride by the platinum of the reactant A forms five-coordinate Pt(IV) acylplatinum complex B with an energy barrier of 21.7 kcal/mol. (2) B undergoes 1,2-acyl migration from the platinum to the cyclometalated carbon through a three-membered platinacycle transition state to give Pt-arene η2-complex E with an energy barrier of 14.0 kcal/mol. (3) E undergoes ligand exchange with chloride to form neutral Pt-arene η2-complex F. (4) F undergoes ligand substitution with acetonitrile to give the product and the energy barrier is small (10.6 kcal/mol). The rate-determining step is the 1,2-acyl migration step. It is interesting to note that intermediate F was not included in the proposed mechanism but was identified by the NEB simulations. Five-coordinate Pt(IV) acylplatinum complex B undergoes barrierless ligand coordination with chloride to form neutral formal oxidative addition acylplatinum complex D; however, D is less stable than reactant A by 2.9 kcal/mol, which also implies that the isolation of an oxidative addition product Pt(IV) complex may be very challenging. The direct reductive elimination of D to form product P has a higher energy barrier (36.6 kcal/mol).
Collapse
Affiliation(s)
- Elizabeth Warden
- Department of Chemistry , East Carolina University , Greenville , North Carolina 27858 , United States
| | - Libero Bartolotti
- Department of Chemistry , East Carolina University , Greenville , North Carolina 27858 , United States
| | - Shouquan Huo
- Department of Chemistry , East Carolina University , Greenville , North Carolina 27858 , United States
| | - Yumin Li
- Department of Chemistry , East Carolina University , Greenville , North Carolina 27858 , United States
| |
Collapse
|
4
|
Jerhaoui S, Djukic JP, Wencel-Delord J, Colobert F. Asymmetric, Nearly Barrierless C(sp3)–H Activation Promoted by Easily-Accessible N-Protected Aminosulfoxides as New Chiral Ligands. ACS Catal 2019. [DOI: 10.1021/acscatal.8b04946] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Soufyan Jerhaoui
- Laboratoire d’Innovation Moléculaire et Applications, ECPM, UMR 7042, Université de Strasbourg/Université de Haute—Alsace, 25 rue Becquerel, Cedex 67087, Strasbourg, France
| | - Jean-Pierre Djukic
- Institut de Chimie de Strasbourg, UMR 7177, Université de Strasbourg, Cedex 67087, Strasbourg, France
| | - Joanna Wencel-Delord
- Laboratoire d’Innovation Moléculaire et Applications, ECPM, UMR 7042, Université de Strasbourg/Université de Haute—Alsace, 25 rue Becquerel, Cedex 67087, Strasbourg, France
| | - Françoise Colobert
- Laboratoire d’Innovation Moléculaire et Applications, ECPM, UMR 7042, Université de Strasbourg/Université de Haute—Alsace, 25 rue Becquerel, Cedex 67087, Strasbourg, France
| |
Collapse
|
5
|
Cornaton Y, Djukic JP. A noncovalent interaction insight onto the concerted metallation deprotonation mechanism. Phys Chem Chem Phys 2019; 21:20486-20498. [DOI: 10.1039/c9cp03650d] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The CMD/AMLA mechanisms of cyclopalladation and the parent fictitious cyclonickelation of N,N-dimethylbenzylamine have been investigated by joint DFT-D and DLPNO-CCSD(T) methods assisted by QTAIM.
Collapse
Affiliation(s)
- Yann Cornaton
- Laboratoire de Mathématiques et de Physique
- F-66860 Perpignan
- France
- Institut de Chimie de Strasbourg
- UMR 7177
| | | |
Collapse
|
6
|
Marcos I, Ojea V, Vázquez-García D, Fernández JJ, Fernández A, López-Torres M, Lado J, Vila JM. Preparation and characterization of terdentate [C,N,N] acetophenone and acetylpyridine hydrazone platinacycles: a DFT insight into the reaction mechanism. Dalton Trans 2017; 46:16845-16860. [PMID: 29171854 DOI: 10.1039/c7dt03418k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of N-ortho-chlorophenyl-substituted acetylpyridine hydrazones (a and d) with K2[PtCl4] (n-butanol/water, 100 °C) gave mononuclear complexes 1a and 1d with the ligands as [N,N] bidentate. In contrast, the reaction of N-phenyl or N-meta-chlorophenyl hydrazones (b and c, respectively) under analogous reaction conditions gave the cycloplatinated species 2b and 2c with the ligand as [C,N,N] terdentate. The treatment of the mononuclear complexes 1a and 1d with NaOAc (n-butanol, 100 °C) gave the corresponding cycloplatinated complexes 2a and 2d. Acetophenone hydrazone platinacycle 2e was prepared in a similar fashion and its reaction with tertiary mono- and triphosphines gave mono- or trinuclear species depending on the reaction conditions. The X-ray crystal structures of some of these complexes showed interesting π-π slipped stacking interactions between metallacyclic rings which, according to NCI analyses, showed an aromatic character. With an aim to rationalize the different reactivities shown by acetylpyridine hydrazones and the precise role of the acetate anion, the energy profiles for the three main steps of cycloplatination (iminoplatinum complex formation, chelation and cyclometallation) have been determined by using the DFT (M06) methods. Calculations indicate that the cycloplatination of 1b proceeds via electrophilic substitution, involving the direct replacement of the chloride anion at the Pt(ii) centre with the N-phenyl moiety as the rate-determining step, to give an agostic intermediate 5b+ that, subsequently, leads to the elimination of a proton as hydrogen chloride. When present as an "external" base, acetate enters the coordination sphere around the Pt(ii) centre and facilitates hydrazone N-H deprotonation and electrophilic C-H activation through a dissociative route, leading to a Wheland-type σ-complex intermediate 9ac.
Collapse
Affiliation(s)
- Ismael Marcos
- Departamento de Química & Centro de Investigaciones Científicas Avanzadas (CICA), Universidade da Coruña, E-15008 La Coruña, Spain.
| | - Vicente Ojea
- Departamento de Química & Centro de Investigaciones Científicas Avanzadas (CICA), Universidade da Coruña, E-15008 La Coruña, Spain.
| | - Digna Vázquez-García
- Departamento de Química & Centro de Investigaciones Científicas Avanzadas (CICA), Universidade da Coruña, E-15008 La Coruña, Spain.
| | - Jesús J Fernández
- Departamento de Química & Centro de Investigaciones Científicas Avanzadas (CICA), Universidade da Coruña, E-15008 La Coruña, Spain.
| | - Alberto Fernández
- Departamento de Química & Centro de Investigaciones Científicas Avanzadas (CICA), Universidade da Coruña, E-15008 La Coruña, Spain.
| | - Margarita López-Torres
- Departamento de Química & Centro de Investigaciones Científicas Avanzadas (CICA), Universidade da Coruña, E-15008 La Coruña, Spain.
| | - Jorge Lado
- Departamento de Química & Centro de Investigaciones Científicas Avanzadas (CICA), Universidade da Coruña, E-15008 La Coruña, Spain.
| | - José M Vila
- Departamento de Química Inorgánica, Universidad de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| |
Collapse
|
7
|
McKeown BA, Lee JP, Mei J, Cundari TR, Gunnoe TB. Transition Metal Mediated C-H Activation and Functionalization: The Role of Poly(pyrazolyl)borate and Poly(pyrazolyl)alkane Ligands. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501470] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Bradley A. McKeown
- Department of Chemistry; University of Virginia; 22904 Charlottesville VA USA
| | - John P. Lee
- Department of Chemistry and Physics; The University of Tennessee at Chattanooga; 37403 Chattanooga TN USA
| | - Jiajun Mei
- Department of Chemistry; University of Virginia; 22904 Charlottesville VA USA
| | - Thomas R. Cundari
- Center for Advanced Scientific Computing and Modeling (CASCaM); Department of Chemistry; University of North Texas; 76203 Denton TX USA
| | - T. Brent Gunnoe
- Department of Chemistry; University of Virginia; 22904 Charlottesville VA USA
| |
Collapse
|
8
|
Affiliation(s)
- Olafs Daugulis
- Department
of Chemistry, University of Houston, Houston, Texas 77204-5003, United States
| | - Amy H. Roy MacArthur
- Department
of Chemistry, United States Naval Academy, 572M Holloway Road, Annapolis, Maryland 21402, United States
| | - Francis C. Rix
- ExxonMobil Chemical
Company, 5200 Bayway Drive, Baytown, Texas 77520, United States
| | - Joseph L. Templeton
- Department
of Chemistry, University of North Carolina at Chapel Hill, CB #3290, Chapel Hill, North Carolina 27599-3290, United States
| |
Collapse
|
9
|
Scheuermann ML, Grice KA, Ruppel MJ, Roselló-Merino M, Kaminsky W, Goldberg KI. Hemilability of P(X)N-type ligands (X = O, N-H): rollover cyclometalation and benzene C-H activation from (P(X)N)PtMe2 complexes. Dalton Trans 2015; 43:12018-25. [PMID: 24975590 DOI: 10.1039/c4dt01143k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The thermolyses of ((tBu)P(O)N)PtMe2 (, (tBu)P(O)N = (di-tert-butylphosphinito)pyridine) and ((tBu)P(N-H)N)PtMe2 (, (tBu)P(N-H)N = (di-tert-butylphosphino)-2-aminopyridine) in benzene-d6 were investigated. With ((tBu)P(O)N)PtMe2, the product of a rollover cyclometalation of the pyridyl ring was observed in 80% yield along with formation of CH4. In contrast, thermolysis of ((tBu)P(N-H)N)PtMe2 resulted in competing rollover cyclometalation and intermolecular benzene C-H activation with production of a mixture of CH4 and CH3D.
Collapse
|
10
|
Campos J, Ortega-Moreno L, Conejero S, Peloso R, López-Serrano J, Maya C, Carmona E. Reactivity of Cationic Agostic and Carbene Structures Derived from Platinum(II) Metallacycles. Chemistry 2015; 21:8883-96. [DOI: 10.1002/chem.201500756] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Indexed: 11/11/2022]
|
11
|
Falceto A, Carmona E, Alvarez S. Electronic and Structural Effects of Low-Hapticity Coordination of Arene Rings to Transition Metals. Organometallics 2014. [DOI: 10.1021/om5009583] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Andrés Falceto
- Departament
de Química Inorgànica and Institut de Química
Teòrica i Computacional, Universitat de Barcelona, Martí
i Franquès 1-11, 08028 Barcelona, Spain
| | - Ernesto Carmona
- Instituto
de Investigaciones Químicas and Departamento de Química
Inorgánica, Universidad de Sevilla−Consejo Superior de Investigaciones Científicas, Avenida Américo Vespucio 49, 41092 Sevilla, Spain
| | - Santiago Alvarez
- Departament
de Química Inorgànica and Institut de Química
Teòrica i Computacional, Universitat de Barcelona, Martí
i Franquès 1-11, 08028 Barcelona, Spain
| |
Collapse
|
12
|
Kapdi AR. Organometallic aspects of transition-metal catalysed regioselective C–H bond functionalisation of arenes and heteroarenes. Dalton Trans 2014; 43:3021-34. [DOI: 10.1039/c3dt52737a] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
13
|
Bendjeriou-Sedjerari A, Azzi JM, Abou-Hamad E, Anjum DH, Pasha FA, Huang KW, Emsley L, Basset JM. Bipodal Surface Organometallic Complexes with Surface N-Donor Ligands and Application to the Catalytic Cleavage of C–H and C–C Bonds in n-Butane. J Am Chem Soc 2013; 135:17943-51. [DOI: 10.1021/ja407902g] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Anissa Bendjeriou-Sedjerari
- KAUST Catalysis Center (KCC), King Abdullah University of Science & Technology, 23955-6900 Thuwal, Saudi Arabia
| | - Joachim M. Azzi
- KAUST Catalysis Center (KCC), King Abdullah University of Science & Technology, 23955-6900 Thuwal, Saudi Arabia
| | - Edy Abou-Hamad
- KAUST Catalysis Center (KCC), King Abdullah University of Science & Technology, 23955-6900 Thuwal, Saudi Arabia
| | - Dalaver H. Anjum
- KAUST Catalysis Center (KCC), King Abdullah University of Science & Technology, 23955-6900 Thuwal, Saudi Arabia
| | - Fahran A. Pasha
- KAUST Catalysis Center (KCC), King Abdullah University of Science & Technology, 23955-6900 Thuwal, Saudi Arabia
| | - Kuo-Wei Huang
- KAUST Catalysis Center (KCC), King Abdullah University of Science & Technology, 23955-6900 Thuwal, Saudi Arabia
| | - Lyndon Emsley
- Université de Lyon, Institut de Sciences Analytiques
(CNRS, ENS-Lyon, UCB Lyon 1), Centre de RMN à Très Hauts
Champs, 5 rue de la Doua, 69100 Villeurbanne, France
| | - Jean-Marie Basset
- KAUST Catalysis Center (KCC), King Abdullah University of Science & Technology, 23955-6900 Thuwal, Saudi Arabia
| |
Collapse
|
14
|
DeMott JC, Bhuvanesh N, Ozerov OV. Frustrated Lewis pair-like splitting of aromatic C–H bonds and abstraction of halogen atoms by a cationic [(FPNP)Pt]+species. Chem Sci 2013. [DOI: 10.1039/c2sc21385k] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
15
|
Rivada-Wheelaghan O, Ortuño MA, Díez J, Lledós A, Conejero S. Tuning N-Heterocyclic Carbenes in T-Shaped PtII Complexes for Intermolecular CH Bond Activation of Arenes. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201200070] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
16
|
Rivada-Wheelaghan O, Ortuño MA, Díez J, Lledós A, Conejero S. Tuning N-heterocyclic carbenes in T-shaped Pt(II) complexes for intermolecular C-H bond activation of arenes. Angew Chem Int Ed Engl 2012; 51:3936-9. [PMID: 22407835 DOI: 10.1002/anie.201200070] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2012] [Revised: 02/08/2012] [Indexed: 11/08/2022]
Abstract
Small change matters: T-shaped Pt(II) complexes with less flexible substituents, than, for example, isopropyl or tert-butyl groups, on N-heterocyclic carbene (NHC) ligands allow for C-H bond activation reactions of aromatic compounds (see scheme; BAr(f)(4)(-) =tetrakis[(3,5-trifluoromethyl)phenyl]borate; F yellow, Pt red). NHC substituents that are not highly branched prevent agostic interactions and reduce the barriers to achieve the C-H bond cleavage.
Collapse
Affiliation(s)
- Orestes Rivada-Wheelaghan
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, CSIC/Universidad de Sevilla, Spain
| | | | | | | | | |
Collapse
|
17
|
Maleckis A, Sanford MS. Facial Tridentate Ligands for Stabilizing Palladium(IV) Complexes. Organometallics 2011. [DOI: 10.1021/om200779j] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Ansis Maleckis
- Department of Chemistry, University of Michigan, 930 North University
Avenue, Ann Arbor, Michigan 48109, United States
| | - Melanie S. Sanford
- Department of Chemistry, University of Michigan, 930 North University
Avenue, Ann Arbor, Michigan 48109, United States
| |
Collapse
|
18
|
McKeown BA, Gonzalez HE, Friedfeld MR, Gunnoe TB, Cundari TR, Sabat M. Mechanistic Studies of Ethylene Hydrophenylation Catalyzed by Bipyridyl Pt(II) Complexes. J Am Chem Soc 2011; 133:19131-52. [DOI: 10.1021/ja206064v] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bradley A. McKeown
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Hector Emanuel Gonzalez
- Center for Advanced Scientific Computing and Modeling (CASCaM), Department of Chemistry, University of North Texas, Denton, Texas 76203, United States
| | - Max R. Friedfeld
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - T. Brent Gunnoe
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Thomas R. Cundari
- Center for Advanced Scientific Computing and Modeling (CASCaM), Department of Chemistry, University of North Texas, Denton, Texas 76203, United States
| | - Michal Sabat
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| |
Collapse
|
19
|
Mazzone G, Russo N, Sicilia E. Dimethylplatinum(II) Complexes: Computational Insights into Pt–C Bond Protonolysis. Inorg Chem 2011; 50:10091-101. [DOI: 10.1021/ic201004n] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gloria Mazzone
- Dipartimento di Chimica and Centro di Calcolo ad Alte Prestazioni per Elaborazioni Parallele e Distribuite-Centro d’Eccellenza MIUR, Università della Calabria, I-87036 Arcavacata di Rende, Italy
| | - Nino Russo
- Dipartimento di Chimica and Centro di Calcolo ad Alte Prestazioni per Elaborazioni Parallele e Distribuite-Centro d’Eccellenza MIUR, Università della Calabria, I-87036 Arcavacata di Rende, Italy
| | - Emilia Sicilia
- Dipartimento di Chimica and Centro di Calcolo ad Alte Prestazioni per Elaborazioni Parallele e Distribuite-Centro d’Eccellenza MIUR, Università della Calabria, I-87036 Arcavacata di Rende, Italy
| |
Collapse
|
20
|
Clot E, Eisenstein O, Jasim N, Macgregor SA, McGrady JE, Perutz RN. C-F and C-H bond activation of fluorobenzenes and fluoropyridines at transition metal centers: how fluorine tips the scales. Acc Chem Res 2011; 44:333-48. [PMID: 21410234 DOI: 10.1021/ar100136x] [Citation(s) in RCA: 397] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
In this Account, we describe the transition metal-mediated cleavage of C-F and C-H bonds in fluoroaromatic and fluoroheteroaromatic molecules. The simplest reactions of perfluoroarenes result in C-F oxida tive addition, but C-H activation competes with C-F activation for partially fluorinated molecules. We first consider the reactivity of the fluoroaromatics toward nickel and platinum complexes, but extend to rhenium and rhodium where they give special insight. Sections on spectroscopy and molecular structure are followed by discussions of energetics and mechanism that incorporate experimental and computational results. We highlight special characteristics of the metal-fluorine bond and the influence of the fluorine substituents on energetics and mechanism. Fluoroaromatics reacting at an ML(2) center initially yield η(2)-arene complexes, followed usually by oxidative addition to generate MF(Ar(F))(L)(2) or MH(Ar(F))(L)(2) (M is Ni, Pd, or Pt; L is trialkylphosphine). The outcome of competition between C-F and C-H bond activation is strongly metal dependent and regioselective. When C-H bonds of fluoroaromatics are activated, there is a preference for the remaining C-F bonds to lie ortho to the metal. An unusual feature of metal-fluorine bonds is their response to replacement of nickel by platinum. The Pt-F bonds are weaker than their nickel counterparts; the opposite is true for M-H bonds. Metal-fluorine bonds are sufficiently polar to form M-F···H-X hydrogen bonds and M-F···I-C(6)F(5) halogen bonds. In the competition between C-F and C-H activation, the thermodynamic product is always the metal fluoride, but marked differences emerge between metals in the energetics of C-H activation. In metal-fluoroaryl bonds, ortho-fluorine substituents generally control regioselectivity and make C-H activation more energetically favorable. The role of fluorine substituents in directing C-H activation is traced to their effect on bond energies. Correlations between M-C and H-C bond energies demonstrate that M-C bond energies increase far more on ortho-fluorine substitution than do H-C bonds. Conventional oxidative addition reactions involve a three-center triangular transition state between the carbon, metal, and X, where X is hydrogen or fluorine, but M(d)-F(2p) repulsion raises the activation energies when X is fluorine. Platinum complexes exhibit an alternative set of reactions involving rearrangement of the phosphine and the fluoroaromatics to a metal(alkyl)(fluorophosphine), M(R)(Ar(F))(PR(3))(PR(2)F). In these phosphine-assisted C-F activation reactions, the phosphine is no spectator but rather is intimately involved as a fluorine acceptor. Addition of the C-F bond across the M-PR(3) bond leads to a metallophosphorane four-center transition state; subsequent transfer of the R group to the metal generates the fluorophosphine product. We find evidence that a phosphine-assisted pathway may even be significant in some apparently simple oxidative addition reactions. While transition metal catalysis has revolutionized hydrocarbon chemistry, its impact on fluorocarbon chemistry has been more limited. Recent developments have changed the outlook as catalytic reactions involving C-F or C-H bond activation of fluorocarbons have emerged. The principles established here have several implications for catalysis, including the regioselectivity of C-H activation and the unfavorable energetics of C-F reductive elimination. Palladium-catalyzed C-H arylation is analyzed to illustrate how ortho-fluorine substituents influence thermodynamics, kinetics, and regioselectivity.
Collapse
Affiliation(s)
- Eric Clot
- Institut Charles Gerhardt, Université Montpellier 2, CNRS UMR 5253, cc 1501 Place Eugène Bataillon, 34000 Montpellier, France
| | - Odile Eisenstein
- Institut Charles Gerhardt, Université Montpellier 2, CNRS UMR 5253, cc 1501 Place Eugène Bataillon, 34000 Montpellier, France
| | - Naseralla Jasim
- Department of Chemistry, University of York, York YO10 5DD, United Kingdom
| | - Stuart A. Macgregor
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - John E. McGrady
- Department of Chemistry, Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
| | - Robin N. Perutz
- Department of Chemistry, University of York, York YO10 5DD, United Kingdom
| |
Collapse
|
21
|
Gómez-Gallego M, Sierra MA. Kinetic isotope effects in the study of organometallic reaction mechanisms. Chem Rev 2011; 111:4857-963. [PMID: 21545118 DOI: 10.1021/cr100436k] [Citation(s) in RCA: 527] [Impact Index Per Article: 40.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Mar Gómez-Gallego
- Departamento de Química Orgánica I, Facultad de Química, Universidad Complutense, 28040 Madrid, Spain.
| | | |
Collapse
|
22
|
Guido E, D’Amico G, Russo N, Sicilia E, Rizzato S, Albinati A, Romeo A, Plutino MR, Romeo R. Mechanistic Insight into Protonolysis and Cis−Trans Isomerization of Benzylplatinum(II) Complexes Assisted by Weak Ligand-to-Metal Interactions. A Combined Kinetic and DFT Study. Inorg Chem 2011; 50:2224-39. [DOI: 10.1021/ic101879s] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Emanuela Guido
- Dipartimento di Chimica Inorganica, Chimica Analitica e Chimica Fisica, Università di Messina, Viale F. Stagno D'Alcontres 31, Vill. S. Agata, I-98166 Messina, Italy
| | - Giuseppina D’Amico
- Dipartimento di Chimica Inorganica, Chimica Analitica e Chimica Fisica, Università di Messina, Viale F. Stagno D'Alcontres 31, Vill. S. Agata, I-98166 Messina, Italy
| | - Nino Russo
- Dipartimento di Chimica, Università della Calabria, I-87030 Arcavacata di Rende (Cs), Italy
| | - Emilia Sicilia
- Dipartimento di Chimica, Università della Calabria, I-87030 Arcavacata di Rende (Cs), Italy
| | - Silvia Rizzato
- Dipartimento di Chimica Strutturale e Facoltà di Farmacia, via Venezian 21, Università di Milano, Milano, Italy
| | - Alberto Albinati
- Dipartimento di Chimica Strutturale e Facoltà di Farmacia, via Venezian 21, Università di Milano, Milano, Italy
| | - Andrea Romeo
- Dipartimento di Chimica Inorganica, Chimica Analitica e Chimica Fisica, Università di Messina, Viale F. Stagno D'Alcontres 31, Vill. S. Agata, I-98166 Messina, Italy
| | - M. Rosaria Plutino
- Istituto per lo Studio dei Materiali Nanostrutturati, ISMN-CNR, Unità di Messina-Sezione di Palermo, c/o Dip. di Chim. Inorg., Chim. Anal., Chim. Fis., Università di Messina, Viale F. Stagno D'Alcontres 31, Vill. S. Agata, I-98166 Messina, Italy
| | - Raffaello Romeo
- Dipartimento di Chimica Inorganica, Chimica Analitica e Chimica Fisica, Università di Messina, Viale F. Stagno D'Alcontres 31, Vill. S. Agata, I-98166 Messina, Italy
| |
Collapse
|
23
|
Butschke B, Schwarz H. Thermal C−H Bond Activation of Benzene, Toluene, and Methane with Cationic [M(X)(bipy)]+ (M = Ni, Pd, Pt; X = CH3, Cl; bipy = 2,2′-bipyridine): A Mechanistic Study. Organometallics 2011. [DOI: 10.1021/om101138d] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Burkhard Butschke
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany
| | - Helmut Schwarz
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany
| |
Collapse
|
24
|
Pfirrmann S, Limberg C, Herwig C, Knispel C, Braun B, Bill E, Stösser R. A reduced β-diketiminato-ligated Ni3H4 unit catalyzing H/D exchange. J Am Chem Soc 2011; 132:13684-91. [PMID: 20828129 DOI: 10.1021/ja106266v] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
An investigation concerning the stepwise reduction of the β-diketiminato nickel(II) hydride dimer [LNi(μ-H)(2)NiL], 1 (L = [HC(CMeNC(6)H(3)(iPr)(2))(2)](-)), has been carried out. While the reaction with one equivalent of potassium graphite, KC(8), led to the mixed valent Ni(I)/Ni(II) complex K[LNi(μ-H)(2)NiL], 3, treatment of 1 with two equivalents of KC(8) surprisingly yielded in the trinuclear complex K(2)[LNi(μ-H)(2)Ni(μ-H)(2)NiL], 4, in good yields. The Ni(3)H(4) core contains one Ni(II) and two Ni(I) centers, which are antiferromagnetically coupled so that a singlet ground state results. 4 represents the first structurally characterized molecular compound with three nickel atoms bridged by hydride ligands, and it shows a very interesting chemical behavior: Single-electron oxidation yields in the Ni(II)(2)Ni(I) compound K[LNi(μ-H)(2)Ni(μ-H)(2)NiL], 5, and treatment with CO leads to the elimination of H(2) with formation of the carbonyl complex K(2)[LNi(CO)](2), 6. Beyond that, it could be shown that 4 undergoes H/D exchange with deuterated solvents and the deuteride-compound 4-D(4) reacts with H(2) to give back 4. The crystal structures of the novel compounds 3-6 have been determined, and their electronic structures have been investigated by EPR and NMR spectroscopy, magnetic measurements, and DFT calculations.
Collapse
Affiliation(s)
- Stefan Pfirrmann
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Strasse 2, 12489 Berlin, Germany
| | | | | | | | | | | | | |
Collapse
|
25
|
Mazzeo M, Strianese M, Kühl O, Peters JC. Phosphido pincer complexes of platinum: synthesis, structure and reactivity. Dalton Trans 2011; 40:9026-33. [DOI: 10.1039/c1dt10825e] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
26
|
Figueroa JS, Piro NA, Mindiola DJ, Fickes MG, Cummins CC. Niobaziridine Hydrides. Organometallics 2010. [DOI: 10.1021/om100522p] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Joshua S. Figueroa
- Department of Chemistry, Massachusetts Institute of Technology, Room 6-435, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, United States
| | - Nicholas A. Piro
- Department of Chemistry, Massachusetts Institute of Technology, Room 6-435, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, United States
| | - Daniel J. Mindiola
- Department of Chemistry, Massachusetts Institute of Technology, Room 6-435, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, United States
| | - Michael G. Fickes
- Department of Chemistry, Massachusetts Institute of Technology, Room 6-435, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, United States
| | - Christopher C. Cummins
- Department of Chemistry, Massachusetts Institute of Technology, Room 6-435, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, United States
| |
Collapse
|
27
|
Albert J, Bosque R, Crespo M, Granell J, Rodríguez J, Zafrilla J. Platinum-Mediated C−H Bond Activation of Arene Solvents and Subsequent C−C Bond Formation. Organometallics 2010. [DOI: 10.1021/om100743z] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joan Albert
- Departament de Química Inorgànica, Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain
| | - Ramon Bosque
- Departament de Química Inorgànica, Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain
| | - Margarita Crespo
- Departament de Química Inorgànica, Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain
| | - Jaume Granell
- Departament de Química Inorgànica, Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain
| | - Judit Rodríguez
- Departament de Química Inorgànica, Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain
| | - Javier Zafrilla
- Departament de Química Inorgànica, Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain
| |
Collapse
|
28
|
Moret ME, Chen P. Mononuclear Platinum(II) Complexes of a Bis(bidentate) Ligand Based on 1,3,4-Oxadiazole and Their Reactions with Copper(I) Salts. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.200900890] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
29
|
Crossley IR. The Organometallic Chemistry of Group 10 Poly(pyrazolyl)borate Complexes. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2010. [DOI: 10.1016/b978-0-12-374784-6.00002-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
30
|
Parmene J, Ivanović-Burmazović I, Tilset M, van Eldik R. Combined Low Temperature Rapid Scan and 1H NMR Mechanistic Study of the Protonation and Subsequent Benzene Elimination from a (Diimine)platinum(II) Diphenyl Complex Relevant to Arene C−H Activation. Inorg Chem 2009; 48:9092-103. [DOI: 10.1021/ic9005746] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jerome Parmene
- Centre for Theoretical and Computational Chemistry, Department of Chemistry, University of Oslo, P.O. Box 1033 Blindern, N-0315 Oslo, Norway
| | - Ivana Ivanović-Burmazović
- Inorganic Chemistry, Department of Chemistry and Pharmacy, University of Erlangen-Nürnberg, Egerlandstrasse 1, D-91058 Erlangen, Germany
| | - Mats Tilset
- Centre for Theoretical and Computational Chemistry, Department of Chemistry, University of Oslo, P.O. Box 1033 Blindern, N-0315 Oslo, Norway
| | - Rudi van Eldik
- Inorganic Chemistry, Department of Chemistry and Pharmacy, University of Erlangen-Nürnberg, Egerlandstrasse 1, D-91058 Erlangen, Germany
| |
Collapse
|
31
|
Tris(pyrazol-1-yl)borate and tris(pyrazol-1-yl)methane: A DFT study of their different binding capability toward Ag(I) and Cu(I) cations. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2009.02.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
32
|
Bernskoetter WH, Hanson SK, Buzak SK, Davis Z, White PS, Swartz R, Goldberg KI, Brookhart M. Investigations of Iridium-Mediated Reversible C−H Bond Cleavage: Characterization of a 16-Electron Iridium(III) Methyl Hydride Complex. J Am Chem Soc 2009; 131:8603-13. [DOI: 10.1021/ja901706b] [Citation(s) in RCA: 100] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wesley H. Bernskoetter
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, and Department of Chemistry, Box 351700, University of Washington, Seattle, Washington 98195-1700
| | - Susan Kloek Hanson
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, and Department of Chemistry, Box 351700, University of Washington, Seattle, Washington 98195-1700
| | - Sara K. Buzak
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, and Department of Chemistry, Box 351700, University of Washington, Seattle, Washington 98195-1700
| | - Zoe Davis
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, and Department of Chemistry, Box 351700, University of Washington, Seattle, Washington 98195-1700
| | - Peter S. White
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, and Department of Chemistry, Box 351700, University of Washington, Seattle, Washington 98195-1700
| | - Rodney Swartz
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, and Department of Chemistry, Box 351700, University of Washington, Seattle, Washington 98195-1700
| | - Karen I. Goldberg
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, and Department of Chemistry, Box 351700, University of Washington, Seattle, Washington 98195-1700
| | - Maurice Brookhart
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, and Department of Chemistry, Box 351700, University of Washington, Seattle, Washington 98195-1700
| |
Collapse
|
33
|
Eguillor B, Esteruelas MA, García-Raboso J, Oliván M, Oñate E. Stoichiometric and Catalytic Deuteration of Pyridine and Methylpyridines by H/D Exchange with Benzene-d6 Promoted by an Unsaturated Osmium Tetrahydride Species. Organometallics 2009. [DOI: 10.1021/om900335b] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Beatriz Eguillor
- Departamento de Química Inorgánica−Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza−CSIC, 50009 Zaragoza, Spain
| | - Miguel A. Esteruelas
- Departamento de Química Inorgánica−Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza−CSIC, 50009 Zaragoza, Spain
| | - Jorge García-Raboso
- Departamento de Química Inorgánica−Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza−CSIC, 50009 Zaragoza, Spain
| | - Montserrat Oliván
- Departamento de Química Inorgánica−Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza−CSIC, 50009 Zaragoza, Spain
| | - Enrique Oñate
- Departamento de Química Inorgánica−Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza−CSIC, 50009 Zaragoza, Spain
| |
Collapse
|
34
|
Yi HB, Lee HM, Kim KS. Interaction of Benzene with Transition Metal Cations: Theoretical Study of Structures, Energies, and IR Spectra. J Chem Theory Comput 2009; 5:1709-17. [PMID: 26609861 DOI: 10.1021/ct900154x] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hai-Bo Yi
- College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China, Department of Chemistry and Center for Basic Sciences, Pohang University of Science and Technology, Pohang 790-784, Korea, and Center for Superfunctional Materials, Department of Chemistry, Pohang University of Science and Technology, San 31, Hyojadong, Namgu, Pohang 790-784, Korea
| | - Han Myoung Lee
- College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China, Department of Chemistry and Center for Basic Sciences, Pohang University of Science and Technology, Pohang 790-784, Korea, and Center for Superfunctional Materials, Department of Chemistry, Pohang University of Science and Technology, San 31, Hyojadong, Namgu, Pohang 790-784, Korea
| | - Kwang S. Kim
- College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China, Department of Chemistry and Center for Basic Sciences, Pohang University of Science and Technology, Pohang 790-784, Korea, and Center for Superfunctional Materials, Department of Chemistry, Pohang University of Science and Technology, San 31, Hyojadong, Namgu, Pohang 790-784, Korea
| |
Collapse
|
35
|
West NM, Templeton JL. Approaches to alkane functionalization with Tp′Pt and (nacnac)Pt reagents. CAN J CHEM 2009. [DOI: 10.1139/v08-141] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In this perspective article we give an overview of our studies of C–H activation with platinum over the past decade. The scorpionate ligand Tp′ (Tp′ = hydrotris(3,5-dimethylpyrazolyl)borate) has exhibited the ability to stabilize both Pt(IV) and Pt(II) complexes due to flexibility between κ3 and κ2 binding modes. Control of the Tp′ coordination mode and Pt oxidation state is tightly coupled with acid/base chemistry. This ability allowed us to model a spectrum of intermediates in C–H activation reactions, including Pt(IV) alkyl hydrides, five-coordinate Pt(IV) silyl hydrides, and Pt(II) benzene complexes. We have been able to observe sturdy Pt(II) benzene complexes and probe their equilibria with the respective C–H activated Pt(IV) species in the presence of an added ligand. We have also taken steps toward functionalizing hydrocarbons with Tp′Pt by dehydrogenation of alkanes and by arylation of olefins. We have recently turned to bidentate nacnac (nacnac = N-phenyl-β-enamineimine) ligands in the hopes of catalytically functionalizing hydrocarbons.Key words: C–H activation, reductive elimination, Tp′Pt, five-coordinate, β-diiminate.
Collapse
|
36
|
Moret ME, Chen P. Mononuclear Organometallic Platinum(II) Complexes and Platinum(II)−Copper(I) Mixed Complexes from Symmetrical 3,5-Bis(iminoacetyl)pyrazolate Ligands. Organometallics 2008. [DOI: 10.1021/om800403y] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Peter Chen
- Labor für Organische Chemie, ETH Zürich, CH-8093 Zürich, Switzerland
| |
Collapse
|
37
|
Cheng TY, Szalda DJ, Hanson JC, Muckerman JT, Bullock RM. Four-Electron-Donor Hemilabile η3-PPh3 Ligand that Binds through a C═C Bond Rather than an Agostic C−H Interaction, and Displacement of the C═C by Methyl Iodide or Water. Organometallics 2008. [DOI: 10.1021/om800401d] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tan-Yun Cheng
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973-5000, and Chemical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, K2-57, Richland, Washington 99352
| | - David J. Szalda
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973-5000, and Chemical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, K2-57, Richland, Washington 99352
| | - Jonathan C. Hanson
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973-5000, and Chemical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, K2-57, Richland, Washington 99352
| | - James T. Muckerman
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973-5000, and Chemical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, K2-57, Richland, Washington 99352
| | - R. Morris Bullock
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973-5000, and Chemical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, K2-57, Richland, Washington 99352
| |
Collapse
|
38
|
Vastine BA, Webster CE, Hall MB. Carbon−Hydrogen Bond Activation in Hydridotris(pyrazolyl)borate Platinum(IV) Complexes: Comparison of Density Functionals, Basis Sets, and Bonding Patterns. J Chem Theory Comput 2007; 3:2268-81. [DOI: 10.1021/ct700120d] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Benjamin Alan Vastine
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77841-3012
| | - Charles Edwin Webster
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77841-3012
| | - Michael B. Hall
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77841-3012
| |
Collapse
|
39
|
Li JL, Geng CY, Huang XR, Zhang X, Sun CC. Theoretical Elucidation of the Platinum-Mediated Arene C−H Activation Reactions. Organometallics 2007. [DOI: 10.1021/om070039d] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ji-Lai Li
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People's Republic of China, and State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China
| | - Cai-Yun Geng
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People's Republic of China, and State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China
| | - Xu-Ri Huang
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People's Republic of China, and State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China
| | - Xiang Zhang
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People's Republic of China, and State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China
| | - Chia-Chung Sun
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People's Republic of China, and State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China
| |
Collapse
|
40
|
Liang LC, Chien PS, Huang YL. Intermolecular arene C-H activation by nickel(II). J Am Chem Soc 2007; 128:15562-3. [PMID: 17147345 DOI: 10.1021/ja065505p] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Intermolecular arene C-H activation mediated by a divalent nickel species under extremely mild conditions is described. The reactions of either Ni(COD)2 with H[N(o-C6H4PR2)2] (H[R-PNP]; R = iPr, Cy) in benzene at room temperature or [R-PNP]NiCl with LiBHEt3 in THF at -35 degrees C produced the corresponding [R-PNP]NiH in high yield. Addition of 1 equiv of B(C6F5)3 to a benzene solution of [R-PNP]NiH at room temperature led to the formation of a mixture that contains [R-PNP]NiPh and [R-PNP]Ni(C6F5), both of which are proposed to evolve from zwitterionic [R-PNP]Ni(mu-H)B(C6F5)3. In contrast, the reaction of [R-PNP]NiH with AlMe3 in benzene at room temperature afforded exclusively the corresponding [R-PNP]NiPh. Similar results were also observed for intermolecular toluene and m-xylene C-H activation by [R-PNP]NiH. A parallel study involving [R-PNP]NiMe (R = Ph, iPr, Cy) on the reactivity of intermolecular arene activation reveals the significance of pi basicity of Ni(II) in these molecules. The remarkable reactivity of inexpensive Ni(II) species established in this study is attractive, particularly from an economic viewpoint, as compared to the current alternatives of 4d and 5d metals.
Collapse
Affiliation(s)
- Lan-Chang Liang
- Department of Chemistry and Center for Nanoscience & Nanotechnology, National Sun Yat-sen University, Kaohsiung 80424, Taiwan.
| | | | | |
Collapse
|
41
|
Michel C, Laio A, Mohamed F, Krack M, Parrinello M, Milet A. Free Energy ab Initio Metadynamics: A New Tool for the Theoretical Study of Organometallic Reactivity? Example of the C−C and C−H Reductive Eliminations from Platinum(IV) Complexes. Organometallics 2007. [DOI: 10.1021/om060980h] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Carine Michel
- LEDSS, UMR 5616 FR2607, University Joseph Fourier-CNRS, 301 rue de la Chimie DU BP, 53 F-38041 Grenoble Cedex 9, France, and Computational Science and Department of Chemistry and Applied Biosciences, ETH Zurich, USI Campus, via Giuseppe Buffi 13, CH-6900 Lugano, Switzerland
| | - Alessandro Laio
- LEDSS, UMR 5616 FR2607, University Joseph Fourier-CNRS, 301 rue de la Chimie DU BP, 53 F-38041 Grenoble Cedex 9, France, and Computational Science and Department of Chemistry and Applied Biosciences, ETH Zurich, USI Campus, via Giuseppe Buffi 13, CH-6900 Lugano, Switzerland
| | - Fawzi Mohamed
- LEDSS, UMR 5616 FR2607, University Joseph Fourier-CNRS, 301 rue de la Chimie DU BP, 53 F-38041 Grenoble Cedex 9, France, and Computational Science and Department of Chemistry and Applied Biosciences, ETH Zurich, USI Campus, via Giuseppe Buffi 13, CH-6900 Lugano, Switzerland
| | - Matthias Krack
- LEDSS, UMR 5616 FR2607, University Joseph Fourier-CNRS, 301 rue de la Chimie DU BP, 53 F-38041 Grenoble Cedex 9, France, and Computational Science and Department of Chemistry and Applied Biosciences, ETH Zurich, USI Campus, via Giuseppe Buffi 13, CH-6900 Lugano, Switzerland
| | - Michele Parrinello
- LEDSS, UMR 5616 FR2607, University Joseph Fourier-CNRS, 301 rue de la Chimie DU BP, 53 F-38041 Grenoble Cedex 9, France, and Computational Science and Department of Chemistry and Applied Biosciences, ETH Zurich, USI Campus, via Giuseppe Buffi 13, CH-6900 Lugano, Switzerland
| | - Anne Milet
- LEDSS, UMR 5616 FR2607, University Joseph Fourier-CNRS, 301 rue de la Chimie DU BP, 53 F-38041 Grenoble Cedex 9, France, and Computational Science and Department of Chemistry and Applied Biosciences, ETH Zurich, USI Campus, via Giuseppe Buffi 13, CH-6900 Lugano, Switzerland
| |
Collapse
|
42
|
Cowley RE, Bontchev RP, Duesler EN, Smith JM. Removing the Sting from the Tail: Reversible Protonation of Scorpionate Ligands in Cobalt(II) Tris(carbene)borate Complexes. Inorg Chem 2006; 45:9771-9. [PMID: 17112274 DOI: 10.1021/ic061299a] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Low-temperature deprotonation of the phenylborane dications, PhB(RIm)3OTf2 (R = tBu, Mes), followed by in situ reaction with CoCl2(thf)1.5, results in the formation of the four-coordinate complexes, kappa3-PhB(RIm)3CoCl, in which the metal is supported by tripodal N-heterocyclic carbene-based ligands. The chloride complexes are exceptionally sensitive to acid and can be reversibly protonated to form the zwitterions kappa2-{PhB(RIm)2(RIm.H)}CoCl2. This unexpected reactivity is attributed to the highly basic nature of the tris(carbene)borate ligands. Reaction of the chloride complexes with methylating reagents results in products that depend on the N-heterocyclic carbene substituent. For R = tBu, the four-coordinate high-spin complex, kappa3-PhB(tBuIm)3CoMe, is formed, while for R = Mes, reduction to a multitude of complexes occurs.
Collapse
Affiliation(s)
- Ryan E Cowley
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, New Mexico 88003, USA
| | | | | | | |
Collapse
|
43
|
Zhang F, Prokopchuk EM, Broczkowski ME, Jennings MC, Puddephatt RJ. Hydridodimethylplatinum(IV) Complexes with Bis(pyridine) Ligands: Effect of Chelate Ring Size on Reactivity. Organometallics 2006. [DOI: 10.1021/om050982m] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fenbao Zhang
- Department of Chemistry, University of Western Ontario, London, Canada N6A 5B7
| | | | | | - Michael C. Jennings
- Department of Chemistry, University of Western Ontario, London, Canada N6A 5B7
| | | |
Collapse
|
44
|
Ponomarenko VI, Pilyugina TS, Khripun VD, Grachova EV, Tunik SP, Haukka M, Pakkanen TA. Reactions of diphenylpyridylphosphine with H2Os3(CO)10 and H4Ru4(CO)12, P–C bond splitting in the coordinated ligand and isolation of the oxidative addition products. J Organomet Chem 2006. [DOI: 10.1016/j.jorganchem.2005.08.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
45
|
Capapé A, Crespo M, Granell J, Vizcarro A, Zafrilla J, Font-Bardía M, Solans X. Unprecedented intermolecular C–H bond activation of a solvent toluene molecule leading to a seven-membered platinacycle. Chem Commun (Camb) 2006:4128-30. [PMID: 17024271 DOI: 10.1039/b608666g] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel platinum-mediated process involving intermolecular activation of a C(aryl)-H bond of toluene, intramolecular activation of an imine C(aryl)-Cl bond and formation of a C-C bond is reported.
Collapse
Affiliation(s)
- Alejandro Capapé
- Departament de Química Inorgànica, Universitat de Barcelona, Diagonal 647, 08028, Barcelona, Spain
| | | | | | | | | | | | | |
Collapse
|
46
|
Berenguer JR, Forniés J, Martín LF, Martín A, Menjón B. Unassisted η2-Coordination of Polycyclic Aromatic Hydrocarbons to Platinum(II). Inorg Chem 2005; 44:7265-7. [PMID: 16212338 DOI: 10.1021/ic050405q] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The coordination of phenanthrene to the d8 Pt(II) center in (SP-4-2)-[Pt(C6F5)2(CO)(eta2-C14H10)] causes a slight pyramidalization at the metal-bound C atoms (C9 and C10), but no perceptible elongation of the corresponding C-C bond [C(13)-C(14) 132.0(5) vs. 133.8(5) pm in the free ligand].
Collapse
Affiliation(s)
- Jesús R Berenguer
- Instituto de Ciencia de Materiales de Aragón, Facultad de Ciencias, Universidad de Zaragoza-C.S.I.C., C/Pedro Cerbuna 12, E-50009 Zaragoza, Spain
| | | | | | | | | |
Collapse
|
47
|
|
48
|
Tsukada N, Hartwig JF. Intermolecular and intramolecular, platinum-catalyzed, acceptorless dehydrogenative coupling of hydrosilanes with aryl and aliphatic methyl C-H bonds. J Am Chem Soc 2005; 127:5022-3. [PMID: 15810828 DOI: 10.1021/ja050612p] [Citation(s) in RCA: 171] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Intermolecular acceptorless dehydrogenative coupling of silanes with arene C-H bonds and intramolecular coupling of silanes with aryl and alkyl C-H bonds occur in good yield in the presence of 5 mol % of TpMe2PtMe2H (TpMe2 = hydridotris(3,5-dimethylpyrazolyl)borate) and related platinum(IV) complexes. The intermolecular reactions of arenes occurred with both trialkyl and dialkylaryl silanes. Intramolecular reactions of dialkylsilylalkylarenes occurred at aryl C-H bonds, and reactions of tributylsilane or dibutylphenylsilane occurred intramolecularly at the aliphatic, primary C-H bond. The reactions of arenes occurred preferentially at the least sterically hindered C-H bonds and preferentially with more electron-poor arenes. Crossover experiments and the lack of reactivity of the arylsilanes with H2 imply that the dehydrogenative silylation of arenes can be irreversible, even in a closed reaction vessel.
Collapse
Affiliation(s)
- Naofumi Tsukada
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520-8107, USA
| | | |
Collapse
|
49
|
Malinowska A, Czeluśniak I, Górski M, Szymańska-Buzar T. W(II)-catalyzed hydroarylation of bicyclo[2.2.1]hept-2-ene by simple arenes. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.01.031] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
50
|
Liang LC, Lin JM, Lee WY. Benzene C–H activation by platinum(ii) complexes of bis(2-diphenylphosphinophenyl)amide. Chem Commun (Camb) 2005:2462-4. [PMID: 15886771 DOI: 10.1039/b501520k] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The amido diphosphine complexes [PNP]PtMe and [PNP]PtOTf, where [PNP]- is bis(2-diphenylphosphinophenyl)amide, effectively activate the benzene C-H bond in the presence of an appropriate Lewis acid or base, leading to the formation of [PNP]PtPh quantitatively.
Collapse
Affiliation(s)
- Lan-Chang Liang
- Department of Chemistry and Center for Nanoscience & Nanotechnology, National Sun Yat-sen University, Kaohsiung 80424, Taiwan.
| | | | | |
Collapse
|