1
|
Sander S, Cosgrove EJ, Müller R, Kaupp M, Braun T. Hydrogen Bonding in Platinum Indolylphosphine Polyfluorido and Fluorido Complexes. Chemistry 2023; 29:e202202768. [PMID: 36327144 PMCID: PMC10107128 DOI: 10.1002/chem.202202768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 11/02/2022] [Accepted: 11/03/2022] [Indexed: 11/06/2022]
Abstract
The reaction of the Pt complexes cis-[Pt(CH3 )(Ar){Ph2 P(Ind)}2 ] (Ind=2-(3-methyl)indolyl, Ar=4-tBuC6 H4 (1 a), 4-CH3 C6 H4 (1 b), Ph (1 c), 4-FC6 H4 (1 d), 4-ClC6 H4 (1 e), 4-CF3 C6 H4 (1 f)) with HF afforded the polyfluorido complexes trans-[Pt(F(HF)2 )(Ar){Ph2 P(Ind)}2 ] 2 a-f, which can be converted into the fluoride derivatives trans-[Pt(F)(Ar){Ph2 P(Ind)}2 ] (3 a-f) by treatment with CsF. The compounds 2 a-f and 3 a-f were characterised thoroughly by multinuclear NMR spectroscopy. The data reveal hydrogen bonding of the fluorido ligand with HF molecules and the indolylphosphine ligand. Polyfluorido complexes 2 a-f show larger |1 J(F,Pt)|, but lower 1 J(H,F) coupling constants when compared to the fluorido complexes 3 a-f. Decreasing 1 J(P,Pt) coupling constants in 2 a-f and 3 a-f suggest a cis influence of the aryl ligands in the following order: 4-tBuC6 H4 (a) ≈4-CH3 C6 H4 (b)<Ph (c)≪4-FC6 H4 (d)<4-ClC6 H4 (e)<4-CF3 C6 H4 (f). In addition, the larger cis influence of aryl ligands bearing electron-withdrawing groups in the para position correlates with decreasing magnitudes of |1 J(F,Pt)| coupling constants. The interpretation of the experimental data was supported by quantum-chemical DFT calculations.
Collapse
Affiliation(s)
- Stefan Sander
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489, Berlin, Germany
| | - Elizabeth J Cosgrove
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489, Berlin, Germany
| | - Robert Müller
- Institut für Chemie, Technische Universität Berlin, Theoretische Chemie/Quantenchemie, Sekr.C7, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Martin Kaupp
- Institut für Chemie, Technische Universität Berlin, Theoretische Chemie/Quantenchemie, Sekr.C7, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Thomas Braun
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489, Berlin, Germany
| |
Collapse
|
2
|
Sander S, Müller R, Ahrens M, Kaupp M, Braun T. Platinum Indolylphosphine Fluorido and Polyfluorido Complexes: An Interplay between Cyclometallation, Fluoride Migration, and Hydrogen Bonding. Chemistry 2021; 27:14287-14298. [PMID: 34337795 PMCID: PMC8596594 DOI: 10.1002/chem.202102451] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Indexed: 11/06/2022]
Abstract
The reaction of [PtCl2 (COD)] (COD=1,5-cyclooctadiene) with diisopropyl-2-(3-methyl)indolylphosphine (iPr2 P(C9 H8 N)) led to the formation of the platinum(ii) chlorido complexes, cis-[PtCl2 {iPr2 P(C9 H8 N)}2 ] (1) and trans-[PtCl2 {iPr2 P(C9 H8 N)}2 ] (2). The cis-complex 1 reacted with NEt3 yielding the complex cis-[PtCl{κ2 -(P,N)-iPr2 P(C9 H7 N)}{iPr2 P(C9 H8 N)}] (3) bearing a cyclometalated κ2 -(P,N)-phosphine ligand, while the isomer 2 with a trans-configuration did not show any reactivity towards NEt3 . Treatment of 1 or 3 with (CH3 )4 NF (TMAF) resulted in the formation of the twofold cyclometalated complex cis-[Pt{κ2 -(P,N)-iPr2 P(C9 H7 N)}2 ] (4). The molecular structures of the complexes 1-4 were determined by single-crystal X-ray diffraction. The fluorido complex cis-[PtF{κ2 -(P,N)-iPr2 P(C9 H7 N)}{iPr2 P(C9 H8 N)}] ⋅ (HF)4 (5 ⋅ (HF)4 ) was formed when complex 4 was treated with different hydrogen fluoride sources. The Pt(ii) fluorido complex 5 ⋅ (HF)4 exhibits intramolecular hydrogen bonding in its outer coordination sphere between the fluorido ligand and the NH group of the 3-methylindolyl moiety. In contrast to its chlorido analogue 3, complex 5 ⋅ (HF)4 reacted with CO or the ynamide 1-(2-phenylethynyl)-2-pyrrolidinone to yield the complexes trans-[Pt(CO){κ2 -(P,C)-iPr2 P(C9 H7 NCO)}{iPr2 P(C9 H8 N)}][F(HF)4 ] (7) and a complex, which we suggest to be cis-[Pt{C=C(Ph)OCN(C3 H6 )}{κ2 -(P,N)-iPr2 P(C9 H7 N)}{iPr2 P(C9 H8 N)}][F(HF)4 ] (9), respectively. The structure of 9 was assigned on the basis of DFT calculations as well as NMR and IR data. Hydrogen bonding of HF and NH to fluoride was proven to be crucial for the existence of 7 and 9.
Collapse
Affiliation(s)
- Stefan Sander
- Department of ChemistryHumboldt-Universität zu BerlinBrook-Taylor-Str. 212489BerlinGermany
| | - Robert Müller
- Institut für ChemieTechnische Universität Berlin, Theoretische Chemie/Quantenchemie, Sekr.C7Straße des 17. Juni 13510623BerlinGermany
| | - Mike Ahrens
- Department of ChemistryHumboldt-Universität zu BerlinBrook-Taylor-Str. 212489BerlinGermany
| | - Martin Kaupp
- Institut für ChemieTechnische Universität Berlin, Theoretische Chemie/Quantenchemie, Sekr.C7Straße des 17. Juni 13510623BerlinGermany
| | - Thomas Braun
- Department of ChemistryHumboldt-Universität zu BerlinBrook-Taylor-Str. 212489BerlinGermany
| |
Collapse
|
3
|
Berger J, Braun T, Ahrens T, Kläring P, Laubenstein R, Braun-Cula B. The Versatile Behavior of Platinum Alkyne Complexes towards XeF 2 : Formation of Fluorovinyl and Fluorido Complexes. Chemistry 2017; 23:8886-8900. [PMID: 28472555 DOI: 10.1002/chem.201700403] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Indexed: 12/31/2022]
Abstract
Reactions of platinum(0) tolane complexes, bearing a chelating ligand with P and N donor atoms, with the electrophilic fluorinating agent XeF2 give facile access to platinum(II) β-fluorovinyl fluorido complexes. A series of new platinum(II) β-fluorovinyl complexes have been synthesized and were structurally characterized. Further oxidation with XeF2 led to ortho-metalated platinum(IV) fluorido compounds. Additional reactions of platinum(0) tolane complexes, bearing a chelating P,P donor ligand, with XeF2 led to a variety of fluorido and fluorovinyl complexes.
Collapse
Affiliation(s)
- Josefine Berger
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor Str. 2, 12489, Berlin, Germany
| | - Thomas Braun
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor Str. 2, 12489, Berlin, Germany
| | - Theresia Ahrens
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor Str. 2, 12489, Berlin, Germany
| | - Paul Kläring
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor Str. 2, 12489, Berlin, Germany
| | - Reik Laubenstein
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor Str. 2, 12489, Berlin, Germany
| | - Beatrice Braun-Cula
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor Str. 2, 12489, Berlin, Germany
| |
Collapse
|
4
|
Ahrens T, Ahrens M, Braun T, Braun B, Herrmann R. Synthesis of a rhodium(i) germyl complex: a useful tool for C–H and C–F bond activation reactions. Dalton Trans 2016; 45:4716-28. [DOI: 10.1039/c5dt04845a] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The rhodium(i) germyl complex [Rh(GePh3)(PEt3)3] is a useful tool for C–F and C–H bond activation reactions. For instance, treatment with hexafluoropropene results in the formation of two isomeric C–F activation products [Rh{(E)-CFCF(CF3)}(PEt3)3] and [Rh{(Z)-CFCF(CF3)}(PEt3)3] in a 3 : 1 ratio.
Collapse
Affiliation(s)
- Theresia Ahrens
- Humboldt-Universität zu Berlin
- Department of Chemistry
- D-12489 Berlin
- Germany
| | - Mike Ahrens
- Humboldt-Universität zu Berlin
- Department of Chemistry
- D-12489 Berlin
- Germany
| | - Thomas Braun
- Humboldt-Universität zu Berlin
- Department of Chemistry
- D-12489 Berlin
- Germany
| | - Beatrice Braun
- Humboldt-Universität zu Berlin
- Department of Chemistry
- D-12489 Berlin
- Germany
| | - Roy Herrmann
- Humboldt-Universität zu Berlin
- Department of Chemistry
- D-12489 Berlin
- Germany
| |
Collapse
|
5
|
|
6
|
Ohashi M, Ogoshi S. Transition-Metal Mediated Transformations of Tetrafluoroethylene intoVarious Polyfluorinated Organic Compounds. J SYN ORG CHEM JPN 2016. [DOI: 10.5059/yukigoseikyokaishi.74.1047] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
7
|
Guidone S, Songis O, Falivene L, Nahra F, Slawin AMZ, Jacobsen H, Cavallo L, Cazin CSJ. Ruthenium Olefin Metathesis Catalysts Containing Fluoride. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00219] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stefano Guidone
- EaStCHEM
School of Chemistry, University of St Andrews, St. Andrews KY16 9ST, United Kingdom
| | - Olivier Songis
- EaStCHEM
School of Chemistry, University of St Andrews, St. Andrews KY16 9ST, United Kingdom
| | - Laura Falivene
- Physical
Sciences and Engineering, Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Fady Nahra
- EaStCHEM
School of Chemistry, University of St Andrews, St. Andrews KY16 9ST, United Kingdom
| | - Alexandra M. Z. Slawin
- EaStCHEM
School of Chemistry, University of St Andrews, St. Andrews KY16 9ST, United Kingdom
| | - Heiko Jacobsen
- KemKom, 1215 Ursulines
Avenue, New
Orleans, Louisiana 70116, United States
| | - Luigi Cavallo
- Physical
Sciences and Engineering, Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Catherine S. J. Cazin
- EaStCHEM
School of Chemistry, University of St Andrews, St. Andrews KY16 9ST, United Kingdom
| |
Collapse
|
8
|
Ahrens T, Kohlmann J, Ahrens M, Braun T. Functionalization of fluorinated molecules by transition-metal-mediated C-F bond activation to access fluorinated building blocks. Chem Rev 2014; 115:931-72. [PMID: 25347593 DOI: 10.1021/cr500257c] [Citation(s) in RCA: 606] [Impact Index Per Article: 60.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Theresia Ahrens
- Humboldt-Universität zu Berlin , Department of Chemistry, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | | | | | | |
Collapse
|
9
|
|
10
|
Bramananthan N, Carmona M, Lowe JP, Mahon MF, Poulten RC, Whittlesey MK. Rh–FHF and Rh–F Complexes Containing Small N-Alkyl Substituted Six-Membered Ring N-Heterocyclic Carbenes. Organometallics 2014. [DOI: 10.1021/om500122e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Nicola Bramananthan
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2
7AY, U.K
| | - María Carmona
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2
7AY, U.K
| | - John P. Lowe
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2
7AY, U.K
| | - Mary F. Mahon
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2
7AY, U.K
| | - Rebecca C. Poulten
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2
7AY, U.K
| | | |
Collapse
|
11
|
Albéniz AC, Casares JA. Palladium-Mediated Organofluorine Chemistry. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2014. [DOI: 10.1016/b978-0-12-800976-5.00001-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
12
|
Zámostná L, Ahrens M, Braun T. Catalytic hydrodefluorination of fluoroaromatics with silanes as hydrogen source at a binuclear rhodium complex: Characterization of key intermediates. J Fluor Chem 2013. [DOI: 10.1016/j.jfluchem.2013.05.021] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
13
|
|
14
|
Kläring P, Braun T. Insertion of CS2into Iridium-Fluorine Bonds. Angew Chem Int Ed Engl 2013; 52:11096-101. [DOI: 10.1002/anie.201305106] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Indexed: 01/22/2023]
|
15
|
Ohashi M, Shibata M, Saijo H, Kambara T, Ogoshi S. Carbon–Fluorine Bond Activation of Tetrafluoroethylene on Palladium(0) and Nickel(0): Heat or Lewis Acidic Additive Promoted Oxidative Addition. Organometallics 2013. [DOI: 10.1021/om400255t] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Masato Ohashi
- Department
of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Mitsutoshi Shibata
- Department
of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hiroki Saijo
- Department
of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Tadashi Kambara
- Department
of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Sensuke Ogoshi
- Department
of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
- JST, Advanced
Catalytic Transformation program for Carbon utilization
(ACT-C), Suita, Osaka 565-0871, Japan
| |
Collapse
|
16
|
Ohashi M, Saijo H, Shibata M, Ogoshi S. Palladium-Catalyzed Base-Free Suzuki-Miyaura Coupling Reactions of Fluorinated Alkenes and Arenes via a Palladium Fluoride Key Intermediate. European J Org Chem 2012. [DOI: 10.1002/ejoc.201201405] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
17
|
Breyer D, Berger J, Braun T, Mebs S. Nickel fluoro complexes as intermediates in catalytic cross-coupling reactions. J Fluor Chem 2012. [DOI: 10.1016/j.jfluchem.2012.06.025] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
18
|
Breyer D, Braun T, Kläring P. Synthesis and Reactivity of the Fluoro Complex trans-[Pd(F)(4-C5NF4)(iPr2PCH2CH2OCH3)2]: C–F Bond Formation and Catalytic C–F Bond Activation Reactions. Organometallics 2012. [DOI: 10.1021/om200998d] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David Breyer
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin,
Germany
| | - Thomas Braun
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin,
Germany
| | - Paul Kläring
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin,
Germany
| |
Collapse
|
19
|
Vergote T, Nahra F, Welle A, Luhmer M, Wouters J, Mager N, Riant O, Leyssens T. Unprecedented Copper(I) Bifluoride Complexes: Synthesis, Characterization and Reactivity. Chemistry 2011; 18:793-8. [DOI: 10.1002/chem.201102655] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2011] [Indexed: 11/08/2022]
|
20
|
Nova A, Mas-Ballesté R, Lledós A. Breaking C–F Bonds via Nucleophilic Attack of Coordinated Ligands: Transformations from C–F to C–X Bonds (X= H, N, O, S). Organometallics 2011. [DOI: 10.1021/om2010386] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ainara Nova
- Institute of Chemical Research of Catalonia (ICIQ), Avinguda Paı̈sos
Catalans 16, 43007 Tarragona, Spain
| | - Rubén Mas-Ballesté
- Departamento de Quı́mica
Inorgánica, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Agustí Lledós
- Departament de Quı́mica, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès,
Barcelona, Spain
| |
Collapse
|
21
|
Braun T, Wehmeier F. C–F Bond Activation of Highly Fluorinated Molecules at Rhodium: From Model Reactions to Catalysis. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201001184] [Citation(s) in RCA: 132] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Thomas Braun
- Humboldt‐Universität zu Berlin, Institut für Chemie, Brook‐Taylor‐Str. 2 12489 Berlin, Germany, Fax: +49‐30‐2093‐6966
| | - Falk Wehmeier
- Humboldt‐Universität zu Berlin, Institut für Chemie, Brook‐Taylor‐Str. 2 12489 Berlin, Germany, Fax: +49‐30‐2093‐6966
| |
Collapse
|
22
|
Fernández A, López-Torres M, Castro-Juiz S, Merino M, Vázquez-García D, Vila JM, Fernández JJ. Dimetalated Crown Ether Schiff Base Palladacycles. Influence of the Carbon Chain Length on the Coordination Mode of Bidentate Phosphines. Crystal and Molecular Structure of the Novel Complex [Pd2{1,4-[C(H)═N{9,10-(C8H16O5)C6H3}]2C6H2-C2,C5}(Cl)2{μ-Ph2P(CH2)5PPh2}2]. Organometallics 2011. [DOI: 10.1021/om100833w] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alberto Fernández
- Departamento de Química Fundamental, Universidade da Coruña, E-15071 La Coruña, Spain
| | | | - Samuel Castro-Juiz
- Departamento de Química Fundamental, Universidade da Coruña, E-15071 La Coruña, Spain
| | - Manuel Merino
- Departamento de Química Fundamental, Universidade da Coruña, E-15071 La Coruña, Spain
| | - Digna Vázquez-García
- Departamento de Química Fundamental, Universidade da Coruña, E-15071 La Coruña, Spain
| | - José M. Vila
- Departamento de Química Inorgánica, Universidad de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - Jesús J. Fernández
- Departamento de Química Fundamental, Universidade da Coruña, E-15071 La Coruña, Spain
| |
Collapse
|
23
|
Voigt J, Braun T. Si–H and Si–Si activation at Pt: synthesis and reactivity of neutral and cationic silyl complexes. Dalton Trans 2011; 40:12699-704. [DOI: 10.1039/c1dt11351h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
24
|
Xu X, Sun H, Shi Y, Jia J, Li X. Imine-assisted C–F bond activation by electron-rich iron complexes supported by trimethylphosphine. Dalton Trans 2011; 40:7866-72. [DOI: 10.1039/c1dt10843c] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
25
|
|
26
|
Mendoza C, Bernès S, Torrens H, Arroyo M. Carbon−Fluorine Bond Activation in Thermolysis Reactions of the Osmium(IV) Perfluorothiolate Compounds [Os(SC6F5)4(P(C6H4X-4)3)] (X = CF3, Cl, F, H, CH3, and OCH3). Organometallics 2010. [DOI: 10.1021/om901065g] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Consuelo Mendoza
- Centro de Química, Instituto de Ciencias, BUAP, Ciudad Universitaria, San Manuel, 72570 Puebla, Puebla, Mexico
| | - Sylvain Bernès
- DEP, Facultad de Ciencias Químicas, UANL, Guerrero y Progreso S/N, Col. Treviño 64570 Monterrey, Nuevo León, Mexico
| | - Hugo Torrens
- DEP, Facultad de Química, UNAM, Ciudad Universitaria, 04510 México D.F., Mexico
| | - Maribel Arroyo
- Centro de Química, Instituto de Ciencias, BUAP, Ciudad Universitaria, San Manuel, 72570 Puebla, Puebla, Mexico
| |
Collapse
|
27
|
Ball ND, Kampf JW, Sanford MS. Synthesis and reactivity of palladium(II) fluoride complexes containing nitrogen-donor ligands. Dalton Trans 2010; 39:632-40. [PMID: 20024002 PMCID: PMC2855696 DOI: 10.1039/b914426a] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This article describes the synthesis, characterization, and reactivity of palladium(II) fluoride complexes containing sp(2) and sp(3) nitrogen-containing supporting ligands. Both cis and trans complexes of general structure (N)(N')Pd(II)(R)(F) (R = Ar or CH(3)) as well as cis-(N)(2)Pd(II)(F)(2) are reported. Crystallographic characterization of these molecules has allowed structural comparisons to related phosphine-ligated species. Furthermore, these studies have revealed that nitrogen-donor ligands support some of the longest and the shortest Pd-F bonds reported to date. The thermal decomposition of (N)(N')Pd(II)(R)(F) has also been examined, and no products of C-F bond-forming reductive elimination were obtained in any case.
Collapse
Affiliation(s)
| | | | - Melanie S. Sanford
- Department of Chemistry, University of Michigan, 930 N. University Ave., Ann Arbor, Michigan, USA. Fax: +1 734-647-4865; Tel: +1 734-615-0451
| |
Collapse
|
28
|
Tsukada N, Wada M, Takahashi N, Inoue Y. Synthesis of dinuclear palladium complexes having two parallel isocyanide ligands, and their application as catalysts to pyrrole formation from tert-butylisocyanide and alkynes. J Organomet Chem 2009. [DOI: 10.1016/j.jorganchem.2008.12.039] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
29
|
Ahijado Salomon M, Braun T, Penner A. Stepwise Oxygenation of Pinacolborane by a Rhodiumperoxo Complex: Detection of an Intermediate Metal Borate and Perborate. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200803768] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
30
|
Stepwise Oxygenation of Pinacolborane by a Rhodiumperoxo Complex: Detection of an Intermediate Metal Borate and Perborate. Angew Chem Int Ed Engl 2008; 47:8867-71. [DOI: 10.1002/anie.200803768] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
31
|
Schaub T, Fischer P, Steffen A, Braun T, Radius U, Mix A. C−F Activation of Fluorinated Arenes using NHC-Stabilized Nickel(0) Complexes: Selectivity and Mechanistic Investigations. J Am Chem Soc 2008; 130:9304-17. [DOI: 10.1021/ja074640e] [Citation(s) in RCA: 209] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Thomas Schaub
- Institut für Anorganische Chemie der Universität Karlsruhe, 76131 Karlsruhe, Germany, Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489 Berlin, Germany, and Fakultät für Chemie, Universität Bielefeld, Universitätsstrasse 25, 33615 Bielefeld, Germany
| | - Peter Fischer
- Institut für Anorganische Chemie der Universität Karlsruhe, 76131 Karlsruhe, Germany, Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489 Berlin, Germany, and Fakultät für Chemie, Universität Bielefeld, Universitätsstrasse 25, 33615 Bielefeld, Germany
| | - Andreas Steffen
- Institut für Anorganische Chemie der Universität Karlsruhe, 76131 Karlsruhe, Germany, Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489 Berlin, Germany, and Fakultät für Chemie, Universität Bielefeld, Universitätsstrasse 25, 33615 Bielefeld, Germany
| | - Thomas Braun
- Institut für Anorganische Chemie der Universität Karlsruhe, 76131 Karlsruhe, Germany, Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489 Berlin, Germany, and Fakultät für Chemie, Universität Bielefeld, Universitätsstrasse 25, 33615 Bielefeld, Germany
| | - Udo Radius
- Institut für Anorganische Chemie der Universität Karlsruhe, 76131 Karlsruhe, Germany, Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489 Berlin, Germany, and Fakultät für Chemie, Universität Bielefeld, Universitätsstrasse 25, 33615 Bielefeld, Germany
| | - Andreas Mix
- Institut für Anorganische Chemie der Universität Karlsruhe, 76131 Karlsruhe, Germany, Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489 Berlin, Germany, and Fakultät für Chemie, Universität Bielefeld, Universitätsstrasse 25, 33615 Bielefeld, Germany
| |
Collapse
|
32
|
Ahijado M, Braun T. Rhodium Derivatives of Peroxoboronic Acids and Peroxoboric Acid: Formation of Metallatrioxaborolanes from an η2-Peroxo Complex. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200705715] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
33
|
Ahijado M, Braun T. Rhodium Derivatives of Peroxoboronic Acids and Peroxoboric Acid: Formation of Metallatrioxaborolanes from an η2-Peroxo Complex. Angew Chem Int Ed Engl 2008; 47:2954-8. [DOI: 10.1002/anie.200705715] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
34
|
Steffen A, Braun T, Neumann B, Stammler HG. Palladium Fluoro Complexes: Useful Tools To Access Organometallic Metallamacrocycles. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200703393] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
35
|
Steffen A, Braun T, Neumann B, Stammler HG. Palladium Fluoro Complexes: Useful Tools To Access Organometallic Metallamacrocycles. Angew Chem Int Ed Engl 2007; 46:8674-8. [DOI: 10.1002/anie.200703393] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
36
|
Braun T, Noveski D, Ahijado M, Wehmeier F. Hydrodefluorination of pentafluoropyridine at rhodium using dihydrogen: detection of unusual rhodium hydrido complexes. Dalton Trans 2007:3820-5. [PMID: 17712449 DOI: 10.1039/b706846h] [Citation(s) in RCA: 96] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The pentafluoropyridyl complex [Rh(4-C5NF4)(PEt3)3] (3) reacts with H2 to give initially the dihydrido complex cis-mer-[Rh(H)2(4-C5NF4)(PEt3)3] (6). Within a few hours 2,3,5,6-tetrafluoropyridine as well as two rhodium(III) complexes mer-[Rh(H)3(PEt3)3] (mer-) and fac-[Rh(H)3(PEt3)3] (fac-) are formed. A catalytic C-F activation process for the formation of 2,3,5,6-tetrafluoropyridine starting from pentafluoropyridine and dihydrogen using 3 as a catalyst has been developed. Reaction of [RhH(PEt3)3] (1) with hydrogen affords fac-[Rh(H)3(PEt3)3] (fac-7) and mer-[Rh(H)3(PEt3)3] (mer-7) in a ratio of 1 : 7.25 at 193 K. The latter complex represents the first mononuclear rhodium compound bearing trans-hydrides.
Collapse
Affiliation(s)
- Thomas Braun
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Strasse 2, 12489 Berlin, Germany.
| | | | | | | |
Collapse
|
37
|
Reger DL, Watson RP, Gardinier JR, Smith MD, Pellechia PJ. Metallacycles of Iron, Zinc, and Cadmium Assembled by Polytopic Bis(pyrazolyl)methane Ligands and Fluoride Abstraction from BF4-. Inorg Chem 2006; 45:10088-97. [PMID: 17140214 DOI: 10.1021/ic0613154] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reactions of the arene-linked bis(pyrazolyl)methane ligands m-bis[bis(1-pyrazolyl)methyl]benzene (m-[CH(pz)2]2C6H4, Lm) and 1,3,5-tris[bis(1-pyrazolyl)methyl]benzene (1,3,5-[CH(pz)2]3C6H3, L3) with BF4- salts of divalent iron, zinc, and cadmium result in fluoride abstraction from BF4- and formation of fluoride-bridged metallacyclic complexes. Treatment of Fe(BF4)2.6H2O and Zn(BF4)2.5H2O with Lm leads to the complexes [Fe2(mu-F)(mu-Lm)2](BF4)3 (1) and [Zn2(mu-F)(mu-Lm)2](BF4)3 (2), in which a single fluoride ligand and two Lm molecules bridge the two metal centers. The reaction of [Cd2(thf)5](BF4)4 with Lm results in the complex [Cd2(mu-F)2(mu-Lm)2](BF4)2 (3), which contains dimeric cations in which two fluoride and two Lm ligands bridge the cadmium centers. Equimolar amounts of the tritopic ligand L3 and Zn(BF4)2.5H2O react to give the related monofluoride-bridged complex [Zn2(mu-F)(mu-L3)2](BF4)3 (4), in which one bis(pyrazolyl)methane unit on each ligand remains unbound. NMR spectroscopic studies show that in acetonitrile the zinc metallacycles observed in the solid-state remain intact in solution.
Collapse
Affiliation(s)
- Daniel L Reger
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA.
| | | | | | | | | |
Collapse
|
38
|
Kannan S, Moody MA, Barnes CL, Duval PB. Fluoride Abstraction and Reversible Photochemical Reduction of Cationic Uranyl(VI) Phosphine Oxide Complexes. Inorg Chem 2006; 45:9206-12. [PMID: 17083218 DOI: 10.1021/ic060742e] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The syntheses, structural and spectroscopic characterization, fluoride abstraction reactions, and photochemical reactivity of cationic uranyl(VI) phosphine oxide complexes are described. [UO2(OPPh3)4][X]2 (1a, X = OTf; 1b, X = BF4) and [UO2(dppmo)2(OPPh3)][X]2 (2a, X = OTf; 2b, X = BF(4)) are prepared from the corresponding uranyl(VI) chloride precursor and 2 equiv each of AgX and phosphine oxide. The BF4- compounds 1b and 2b are prone to fluoride abstraction reactions in methanol, leading to dinuclear fluoride-bridged uranyl(VI) complexes. Fluoride abstraction of 2b in methanol generates two structural isomers of the fluoride-bridged uranyl(VI) dimer [(UO2(dppmo)2)2(mu-F)][BF4]3 (4), both of which have been structurally characterized. In the major isomer 4C, the four dppmo ligands are all chelating, while in the minor isomer 4B, two of the dppmo ligands bridge adjacent uranyl(VI) centers. Photolysis of 2b in methanol proceeds through 4 to form the uranium(IV) fluoride complex [UO2F2(dppmo)3][BF4]2 (5), involving another fluoride abstraction step. X-ray crystallography shows 5 to be a rare example of a structurally characterized uranium(IV) complex possessing terminal U-F bonds. Complex 5 reverts to 4 in solution upon exposure to air.
Collapse
Affiliation(s)
- Shanmugaperumal Kannan
- Department of Chemistry, University of Missouri-Columbia, 601 South College Avenue, Columbia, Missouri 65211, USA
| | | | | | | |
Collapse
|
39
|
Azerraf C, Cohen S, Gelman D. Roof-Shaped Halide-Bridged Bimetallic Complexes via Ring Expansion Reaction. Inorg Chem 2006; 45:7010-7. [PMID: 16903761 DOI: 10.1021/ic060700q] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Binucleating behavior of rigid triptycene-based ligands has been studied. It has been demonstrated that trans-spanned transition-metal mononuclear complexes bearing 1,8-bis(diisopropylphosphino)triptycene (L1) and 1-diisopropylphosphino-8-diphenylphosphinotriptycene (L2) react with an appropriate transition-metal precursor via a ring-expansion pathway to form unusual bimetallic quasi-closed structures. New palladium and rhodium complexes featuring strongly bent (ca. 115 degrees ) M2(mu-Cl2) cores with very closely spanned metal centers (less than 3 A) have been prepared using the described ring-expansion reaction and have been fully characterized. Despite a constrained arrangement of the binuclear system, halogen bridges in all new compounds were stable in both the solid state and solution showing no tendency for dissociation even in the presence of added Lewis bases. Spontaneous resolution of the dissymmetric Pd2(mu-Cl)2Cl2(1-diisopropylphosphino-8-diphenylphosphinotriptycene) (2) into enantiopure antipodes is discussed as well.
Collapse
Affiliation(s)
- Clarite Azerraf
- Department of Organic Chemistry, The Hebrew University of Jerusalem, Jerusalem, 91904 Israel
| | | | | |
Collapse
|
40
|
Palladium mediated activation of C–F bonds in 2,4,6-trifluoropyrimidine: Synthesis and structure of palladium pyrimidyloxy and pyrimidinone derivatives. J Fluor Chem 2006. [DOI: 10.1016/j.jfluchem.2005.12.025] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
41
|
Braun T, Izundu J, Steffen A, Neumann B, Stammler HG. Reactivity of a palladium fluoro complex towards silanes and Bu3SnCHCH2: catalytic derivatisation of pentafluoropyridine based on carbon–fluorine bond activation reactions. Dalton Trans 2006:5118-23. [PMID: 17077884 DOI: 10.1039/b608410a] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The chloro and azido complexes trans-[PdCl(4-C5NF4)(PiPr3)2] (3) and trans-[Pd(N3)(4-C5NF4)(PiPr3)2] (4) can be prepared by reaction of [PdF(4-C5NF4)(PiPr3)2] (2) with Et3SiCl or MeSiN3, respectively. In contrast, reactions of 2 with Ph3SiH or Me2FSiSiFMe2 give the products of reductive elimination 2,3,5,6-tetrafluoropyridine (5) or 4-(fluorodimethylsilyl)tetrafluoropyridine (6) as well as [Pd(PiPr3)2] (1). In a catalytic experiment, pentafluoropyridine can be converted with Ph3SiH into 5 in 62% yield, when 10% of 2 is employed as catalyst. Treatment of trans-[PdF(4-C5NF4)(PiPr3)2] (2) with Bu3SnCH=CH2 in THF at 50 degrees C results in the formation of [Pd(PiPr3)2] (1) and 4-vinyltetrafluoropyridine (7). Complex 2 is also active as a catalyst towards a Stille cross-coupling reaction of pentafluoropyridine with Bu3SnCH=CH2 to give 4-vinyltetrafluoropyridine (7) with a TON of 6. The molecular structure of the complex 3 has been determined by X-ray crystallography.
Collapse
Affiliation(s)
- Thomas Braun
- Fakultät für Chemie, Universität Bielefeld, Postfach 100131, 33501 Bielefeld, Germany.
| | | | | | | | | |
Collapse
|