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Ballico M, Alessi D, Aneggi E, Busato M, Zuccaccia D, Allegri L, Damante G, Jandl C, Baratta W. Cyclometalated and NNN Terpyridine Ruthenium Photocatalysts and Their Cytotoxic Activity. Molecules 2024; 29:2146. [PMID: 38731639 PMCID: PMC11085208 DOI: 10.3390/molecules29092146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2024] [Revised: 04/16/2024] [Accepted: 04/30/2024] [Indexed: 05/13/2024] Open
Abstract
The cyclometalated terpyridine complexes [Ru(η2-OAc)(NC-tpy)(PP)] (PP = dppb 1, (R,R)-Skewphos 4, (S,S)-Skewphos 5) are easily obtained from the acetate derivatives [Ru(η2-OAc)2(PP)] (PP = dppb, (R,R)-Skewphos 2, (S,S)-Skewphos 3) and tpy in methanol by elimination of AcOH. The precursors 2, 3 are prepared from [Ru(η2-OAc)2(PPh3)2] and Skewphos in cyclohexane. Conversely, the NNN complexes [Ru(η1-OAc)(NNN-tpy)(PP)]OAc (PP = (R,R)-Skewphos 6, (S,S)-Skewphos 7) are synthesized in a one pot reaction from [Ru(η2-OAc)2(PPh3)2], PP and tpy in methanol. The neutral NC-tpy 1, 4, 5 and cationic NNN-tpy 6, 7 complexes catalyze the transfer hydrogenation of acetophenone (S/C = 1000) in 2-propanol with NaOiPr under light irradiation at 30 °C. Formation of (S)-1-phenylethanol has been observed with 4, 6 in a MeOH/iPrOH mixture, whereas the R-enantiomer is obtained with 5, 7 (50-52% ee). The tpy complexes show cytotoxic activity against the anaplastic thyroid cancer 8505C and SW1736 cell lines (ED50 = 0.31-8.53 µM), with the cationic 7 displaying an ED50 of 0.31 µM, four times lower compared to the enantiomer 6.
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Affiliation(s)
- Maurizio Ballico
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy; (D.A.); (E.A.); (M.B.); (D.Z.)
| | - Dario Alessi
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy; (D.A.); (E.A.); (M.B.); (D.Z.)
| | - Eleonora Aneggi
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy; (D.A.); (E.A.); (M.B.); (D.Z.)
| | - Marta Busato
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy; (D.A.); (E.A.); (M.B.); (D.Z.)
| | - Daniele Zuccaccia
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy; (D.A.); (E.A.); (M.B.); (D.Z.)
| | - Lorenzo Allegri
- Dipartimento di Medicina, Istituto di Genetica Medica, Università di Udine, Via Chiusaforte, F3, I-33100 Udine, Italy; (L.A.); (G.D.)
| | - Giuseppe Damante
- Dipartimento di Medicina, Istituto di Genetica Medica, Università di Udine, Via Chiusaforte, F3, I-33100 Udine, Italy; (L.A.); (G.D.)
| | - Christian Jandl
- Department of Chemistry & Catalysis Research Center, Technische Universität München, Ernst-Otto-Fischer-Str. 1, 85748 Garching bei München, Germany;
| | - Walter Baratta
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy; (D.A.); (E.A.); (M.B.); (D.Z.)
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Mollar-Cuni A, Ibáñez-Ibáñez L, Guisado-Barrios G, Mata JA, Vicent C. Introducing Ion Mobility Mass Spectrometry to Identify Site-Selective C-H Bond Activation in N-Heterocyclic Carbene Metal Complexes. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2022; 33:2291-2300. [PMID: 36374280 DOI: 10.1021/jasms.2c00257] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The activation of C-H bonds in a selective manner still constitutes a major challenge from a synthetic point of view; thus, it remains an active area of fundamental and applied research. Herein, we introduce ion mobility spectrometry mass spectrometry-based (IM-MS) approaches to uncover site-selective C-H bond activation in a series of metal complexes of general formula [(NHC)LMCl]+ (NHC = N-heterocyclic carbene; L = pentamethylcyclopentadiene (Cp*) or p-cymene; M = Pd, Ru, and Ir). The C-H bond activation at the N-bound groups of the NHC ligand is promoted upon collision induced dissociation (CID). The identification of the resulting [(NHC-H)LM]+ isomers relies on the distinctive topology that such cyclometalated isomers adopt upon site-selective C-H bond activation. Such topological differences can be reliably evidenced as different mobility peaks in their respective CID-IM mass spectra. Alternative isomers are also identified via dehydrogenation at the Cp*/p-cymene (L) ligands to afford [(NHC)(L-H)M]+. The fragmentation of the ion mobility-resolved peaks is also investigated by CID-IM-CID. It enables the assignment of mobility peaks to the specific isomers formed from C(sp2)-H or C(sp3)-H bond activation and distinguishes them from the Cp*/p-cymene (L) dehydrogenation isomers. The conformational change of the NHC ligands upon C-H bond activation, concomitant with cyclometalation, is also discussed on the basis of the estimated collision cross section (CCS). A unique conformation change of the pyrene-tagged NHC members is identified that involves the reorientation of the NHC ring accompanied by a folding of the pyrene moiety.
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Affiliation(s)
- Andrés Mollar-Cuni
- Institute of Advanced Materials (INAM), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universitat Jaume I, Avda. Sos Baynat s/n, 12071, Castellón, Spain
| | - Laura Ibáñez-Ibáñez
- Institute of Advanced Materials (INAM), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universitat Jaume I, Avda. Sos Baynat s/n, 12071, Castellón, Spain
| | - Gregorio Guisado-Barrios
- Departamento de Química Inorgánica. Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, 50009Zaragoza, Spain
| | - Jose A Mata
- Institute of Advanced Materials (INAM), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universitat Jaume I, Avda. Sos Baynat s/n, 12071, Castellón, Spain
| | - Cristian Vicent
- Serveis Centrals d'Intrumentació Científica (SCIC). Universitat Jaume I, Avda. Sos Baynat s/n, 12071Castellón, Spain
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3
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Citta RJ, Koteles BL, Delgado-Perez B, Chan BC, Kalman SE. Ruthenium(II) Complexes of an Imidazole Carboxamido Ligand for Base-Free Transfer Hydrogenation in Air. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Richard J. Citta
- Chemistry Program, School of Natural Sciences and Mathematics, Stockton University, Galloway, New Jersey 08205, United States
| | - Brandon L. Koteles
- Chemistry Program, School of Natural Sciences and Mathematics, Stockton University, Galloway, New Jersey 08205, United States
| | - Brenda Delgado-Perez
- Chemistry Program, School of Natural Sciences and Mathematics, Stockton University, Galloway, New Jersey 08205, United States
| | - Benny C. Chan
- Chemistry Department, The College of New Jersey, Ewing, New Jersey 08618, United States
| | - Steven E. Kalman
- Chemistry Program, School of Natural Sciences and Mathematics, Stockton University, Galloway, New Jersey 08205, United States
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4
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Puig E, Verron R, Kechaou-Perrot M, Vendier L, Gornitzka H, Miqueu K, Sotiropoulos JM, Fischmeister C, Sutra P, Igau A. Shvo-Type Metal–Ligand Cooperative Catalysts: Tethered η 5-Oxocyclohexadienyl Ruthenium Complexes. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Emmanuel Puig
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, BP 44099, Toulouse Cedex 4 F-31077, France
- Université de Toulouse, UPS, INPT, Toulouse Cedex 4 F-31077, France
| | - Raphaël Verron
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)─UMR 6226, Rennes F-35042, France
| | - Manel Kechaou-Perrot
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, BP 44099, Toulouse Cedex 4 F-31077, France
- Université de Toulouse, UPS, INPT, Toulouse Cedex 4 F-31077, France
| | - Laure Vendier
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, BP 44099, Toulouse Cedex 4 F-31077, France
- Université de Toulouse, UPS, INPT, Toulouse Cedex 4 F-31077, France
| | - Heinz Gornitzka
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, BP 44099, Toulouse Cedex 4 F-31077, France
- Université de Toulouse, UPS, INPT, Toulouse Cedex 4 F-31077, France
| | - Karinne Miqueu
- CNRS/Université de Pau & des Pays de l’Adour, E2S-UPPA, Institut des Sciences Analytiques et de Physico-Chimie pour l’Environnement et les Matériaux (IPREM), UMR CNRS 5254, 2 Avenue du Président P. Angot, Pau 64053, Cedex 09, France
| | - Jean-Marc Sotiropoulos
- CNRS/Université de Pau & des Pays de l’Adour, E2S-UPPA, Institut des Sciences Analytiques et de Physico-Chimie pour l’Environnement et les Matériaux (IPREM), UMR CNRS 5254, 2 Avenue du Président P. Angot, Pau 64053, Cedex 09, France
| | - Cédric Fischmeister
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)─UMR 6226, Rennes F-35042, France
| | - Pierre Sutra
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, BP 44099, Toulouse Cedex 4 F-31077, France
- Université de Toulouse, UPS, INPT, Toulouse Cedex 4 F-31077, France
| | - Alain Igau
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, BP 44099, Toulouse Cedex 4 F-31077, France
- Université de Toulouse, UPS, INPT, Toulouse Cedex 4 F-31077, France
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5
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Walg SP, Dietrich F, Grün A, Cayir Kücükdisli M, Sun Y, Thiel WR, Gerhards M. Synthesis and photophysical properties of multimetallic gold/zinc complexes of (P,N,N,N,P) and (P,N,N) ligands. NEW J CHEM 2022. [DOI: 10.1039/d1nj05806a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Orthogonal coordination of gold and zinc yields mono- and bimetallic complexes, which are investigated concerning their photophysics.
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Affiliation(s)
- Simon P. Walg
- Institute of Inorganic Chemistry, Technische Universität Kaiserslautern, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Fabian Dietrich
- Institute of Physical and Theoretical Chemistry & Reseach Center Optimas, Technische Universität Kaiserslautern, Erwin-Schrödinger-Str. 52, 67663 Kaiserslautern, Germany
- Núcleo Milenio Multimat & Departamento de Ciencias Físicas, Universidad de La Frontera, Francisco Salazar 01145, Temuco, Chile
| | - Anneken Grün
- Institute of Physical and Theoretical Chemistry & Reseach Center Optimas, Technische Universität Kaiserslautern, Erwin-Schrödinger-Str. 52, 67663 Kaiserslautern, Germany
| | - Merve Cayir Kücükdisli
- Institute of Inorganic Chemistry, Technische Universität Kaiserslautern, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Yu Sun
- Institute of Inorganic Chemistry, Technische Universität Kaiserslautern, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Werner R. Thiel
- Institute of Physical and Theoretical Chemistry & Reseach Center Optimas, Technische Universität Kaiserslautern, Erwin-Schrödinger-Str. 52, 67663 Kaiserslautern, Germany
| | - Markus Gerhards
- Institute of Inorganic Chemistry, Technische Universität Kaiserslautern, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
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A gas-phase study on the cyclometallation of a series of Cp*Ir(III) complexes bearing bidentate pyrimidine ligands. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.122063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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7
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Ruthenacycles and Iridacycles as Transfer Hydrogenation Catalysts. Molecules 2021; 26:molecules26134076. [PMID: 34279416 PMCID: PMC8271416 DOI: 10.3390/molecules26134076] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 06/22/2021] [Accepted: 06/29/2021] [Indexed: 11/29/2022] Open
Abstract
In this review, we describe the synthesis and use in hydrogen transfer reactions of ruthenacycles and iridacycles. The review limits itself to metallacycles where a ligand is bound in bidentate fashion to either ruthenium or iridium via a carbon–metal sigma bond, as well as a dative bond from a heteroatom or an N-heterocyclic carbene. Pincer complexes fall outside the scope. Described are applications in (asymmetric) transfer hydrogenation of aldehydes, ketones, and imines, as well as reductive aminations. Oxidation reactions, i.e., classical Oppenauer oxidation, which is the reverse of transfer hydrogenation, as well as dehydrogenations and oxidations with oxygen, are described. Racemizations of alcohols and secondary amines are also catalyzed by ruthenacycles and iridacycles.
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Hagimori M, Karimine Y, Mizuyama N, Hara F, Fujino T, Saji H, Mukai T. Selective Cadmium Fluorescence Probe Based on Bis-heterocyclic Molecule and its Imaging in Cells. J Fluoresc 2021; 31:1161-1167. [PMID: 33983566 DOI: 10.1007/s10895-021-02748-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 05/07/2021] [Indexed: 10/21/2022]
Abstract
Fluorescence probes that selectively image cadmium are useful for detecting and tracking the amount of Cd2+ in cells and tissues. In this study, we designed and synthesized a novel Cd2+ fluorescence probe based on the pyridine-pyrimidine structure, 4-(methylsulfanyl)-6-(pyridin-2-yl)pyrimidin-2-amine (3), as a low-molecular-weight fluorescence probe for Cd2+. Compound 3 could successfully discriminate between Cd2+ and Zn2+ and exhibited a highly selective turn-on response toward Cd2+ over biologically related metal ions. The dissociation constant (Kd) and the limit of detection (LOD) of 5.4 × 10- 6 mol L- 1 and 4.4 × 10- 7 mol L- 1, respectively, were calculated using fluorescence titration experiments. Studies with closely related analogs showed that the bis-heterocyclic moiety of 3 acted as both a coordination site for Cd2+ and a fluorophore. Further, the methylsulfanyl group of compound 3 is essential for achieving selective and sensitive Cd2+ detection. Fluorescence microscopy studies using living cells revealed that the cell membrane permeability of compound 3 is sufficient to detect intracellular Cd2+. These results indicate that novel bis-heterocyclic molecule 3 has considerable potential as a fluorescence probe for Cd2+ in biological applications.
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Affiliation(s)
- Masayori Hagimori
- Faculty of Pharmaceutical Sciences, Mukogawa Women's University, 11-68 Koshien Kyubancho, Nishinomiya, 663-8179, Japan.
- Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1 Sakamoto, Nagasaki, 852- 8501, Japan.
| | - Yasushi Karimine
- Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1 Sakamoto, Nagasaki, 852- 8501, Japan
| | - Naoko Mizuyama
- Division of Medical Innovation, Translational Research Center for Medical Innovation, 1-5-4 Minatojima-minamimachi, Chuo-ku, Kobe, 650-0047, Japan
| | - Fumiko Hara
- Faculty of Pharmaceutical Sciences, Mukogawa Women's University, 11-68 Koshien Kyubancho, Nishinomiya, 663-8179, Japan
| | - Takeshi Fujino
- Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakura- ku, 338-8570, Saitama, Japan
| | - Hideo Saji
- Graduate School of Pharmaceutical Sciences, Kyoto University, 46-29 Yoshida-Shimoadachi- cho, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Takahiro Mukai
- Department of Biophysical Chemistry, Kobe Pharmaceutical University, 4-19-1 Motoyamakita Machi, Higashinada-Ku, Kobe, 658-8558, Japan
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Structure-dependent regioselectivity of a roll-over cyclopalladation occuring at 2,2′-bipyridine-type ligands. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121780] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Wall T, Leist M, Dietrich F, Thiel WR, Gerhards M. Quantification of Cooperativity between Metal Sites in Dinuclear Transition Metal Complexes Containing the (2-Dimethylamino)-4-(2-pyrimidinyl)pyrimidine Ligand. Chempluschem 2021; 86:622-628. [PMID: 33851792 DOI: 10.1002/cplu.202100049] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 03/17/2021] [Indexed: 01/25/2023]
Abstract
A concept for the quantification of cooperative effects in transition-metal complexes is presented. It is demonstrated for a series of novel N,N- (mononuclear) and C,N-coordinated homo- and heterometallic binuclear complexes based on the (2-dimethylamino)-4-(2-pyrimidinyl)pyrimidine ligand, which are accessible by applying roll-over cyclometallation. These iridium-, platinum-, and palladium-containing compounds are investigated with respect to their absorption and fluorescence spectra. The cooperative effects in the electronic absorptions, i. e., the energetic shifts between mononuclear and dinuclear complexes, and free ligands are analyzed on the basis of the lowest energy π-π* transitions and compared to calculated data, obtained from TD-DFT calculations. Furthermore the corresponding fluorescence spectra are presented and analyzed with respect to the concept of cooperativity.
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Affiliation(s)
- Tatjana Wall
- Research Center Optimas, TU Kaiserlautern, Erwin-Schrödinger-Str. 52, 67663, Kaiserslautern, Germany.,Fachbereich Chemie, TU Kaiserslautern, Erwin-Schrödinger-Str. 54, 67663, Kaiserslautern, Germany
| | - Marko Leist
- Fachbereich Chemie, TU Kaiserslautern, Erwin-Schrödinger-Str. 54, 67663, Kaiserslautern, Germany
| | - Fabian Dietrich
- Research Center Optimas, TU Kaiserlautern, Erwin-Schrödinger-Str. 52, 67663, Kaiserslautern, Germany.,Fachbereich Chemie, TU Kaiserslautern, Erwin-Schrödinger-Str. 54, 67663, Kaiserslautern, Germany.,Núcleo Milenio MultiMat & Physics Department, Universidad de La Frontera, Francisco Salazar, 01145, Temuco, Chile
| | - Werner R Thiel
- Fachbereich Chemie, TU Kaiserslautern, Erwin-Schrödinger-Str. 54, 67663, Kaiserslautern, Germany
| | - Markus Gerhards
- Research Center Optimas, TU Kaiserlautern, Erwin-Schrödinger-Str. 52, 67663, Kaiserslautern, Germany.,Fachbereich Chemie, TU Kaiserslautern, Erwin-Schrödinger-Str. 54, 67663, Kaiserslautern, Germany
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Zucca A, Pilo MI. Rollover Cyclometalation as a Valuable Tool for Regioselective C-H Bond Activation and Functionalization. Molecules 2021; 26:E328. [PMID: 33435257 PMCID: PMC7827749 DOI: 10.3390/molecules26020328] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 01/03/2021] [Accepted: 01/04/2021] [Indexed: 01/31/2023] Open
Abstract
Rollover cyclometalation constitutes a particular case of cyclometallation reaction. This reaction occurs when a chelated heterocyclic ligand loses its bidentate coordination mode and undergoes an internal rotation, after which a remote C-H bond is regioselectively activated, affording an uncommon cyclometalated complex, called "rollover cyclometalated complex". The key of the process is the internal rotation of the ligand, which occurs before the C-H bond activation and releases from coordination a donor atom. The new "rollover" ligand has peculiar properties, being a ligand with multiple personalities, no more a spectator in the reactivity of the complex. The main reason of this peculiarity is the presence of an uncoordinated donor atom (the one initially involved in the chelation), able to promote a series of reactions not available for classic cyclometalated complexes. The rollover reaction is highly regioselective, because the activated C-H bond is usually in a symmetric position with respect to the donor atom which detaches from the metal stating the rollover process. Due to this novel behavior, a series of potential applications have appeared in the literature, in fields such as catalysis, organic synthesis, and advanced materials.
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Affiliation(s)
- Antonio Zucca
- Department of Chemistry and Pharmacy, University of Sassari, via Vienna 2, 07100 Sassari, Italy;
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Sánchez-Page B, Munarriz J, Jiménez MV, Pérez-Torrente JJ, Blasco J, Subias G, Passarelli V, Álvarez P. β-(Z) Selectivity Control by Cyclometalated Rhodium(III)–Triazolylidene Homogeneous and Heterogeneous Terminal Alkyne Hydrosilylation Catalysts. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03295] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Beatriz Sánchez-Page
- Departamento de Quı́mica Inorgánica, Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-C.S.I.C., 50009 Zaragoza, Spain
| | - Julen Munarriz
- Department of Chemistry & Biochemistry, University of California—Los Angeles, Los Angeles, California 90095, United States
- Departamento de Quı́mica Fı́sica and Instituto de Biocomputación y Fı́sica de Sistemas Complejos (BIFI), Universidad de Zaragoza, Facultad de Ciencias, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - M. Victoria Jiménez
- Departamento de Quı́mica Inorgánica, Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-C.S.I.C., 50009 Zaragoza, Spain
| | - Jesús J. Pérez-Torrente
- Departamento de Quı́mica Inorgánica, Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-C.S.I.C., 50009 Zaragoza, Spain
| | - Javier Blasco
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC - Universidad de Zaragoza, 50009 Zaragoza, Spain
- Departamento de Fı́sica de la Materia Condensada, Universidad de Zaragoza, Zaragoza 50009, Spain
| | - Gloria Subias
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC - Universidad de Zaragoza, 50009 Zaragoza, Spain
- Departamento de Fı́sica de la Materia Condensada, Universidad de Zaragoza, Zaragoza 50009, Spain
| | - Vincenzo Passarelli
- Centro Universitario de la Defensa, Ctra. Huesca s/n, ES-50090 Zaragoza, Spain
| | - Patricia Álvarez
- Instituto de Ciencia y Tecnologı́a del Carbono, INCAR, CSIC, P.O. Box, 73, 33080 Oviedo, Spain
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Synthesis and spectral studies of sterically hindered half-sandwich d 6 metal complexes containing quinoxaline based electron rich heterocyclic pyrazoles. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.01.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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14
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Leist M, Kerner C, Ghoochany LT, Farsadpour S, Fizia A, Neu JP, Schön F, Sun Y, Oelkers B, Lang J, Menges F, Niedner-Schatteburg G, Salih KS, Thiel WR. Roll-over cyclometalation: A versatile tool to enhance the catalytic activity of transition metal complexes. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.03.022] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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15
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Schön F, Leist M, Neuba A, Lang J, Braun C, Sun Y, Niedner-Schatteburg G, Bräse S, Thiel WR. A direct access to heterobimetallic complexes by roll-over cyclometallation. Chem Commun (Camb) 2018; 53:12016-12019. [PMID: 29057406 DOI: 10.1039/c7cc07119a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Complexes of the type [Cp*Ir(N,N')Cl]+ (N,N' = 2-(2-dialkylaminopyrimidin-4-yl)pyrimidine) can undergo roll-over cyclometallation leading to a novel N,N'-donor site. Following this strategy heterobimetallic complexes including iridium(iii) and a Group X metal centre in the oxidation state +II were achieved.
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Affiliation(s)
- F Schön
- Fachbereich Chemie, TU Kaiserslautern, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany.
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16
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Kruppa SV, Bäppler F, Holzer C, Klopper W, Diller R, Riehn C. Vibrational Coherence Controls Molecular Fragmentation: Ultrafast Photodynamics of the [Ag 2Cl] + Scaffold. J Phys Chem Lett 2018; 9:804-810. [PMID: 29370699 DOI: 10.1021/acs.jpclett.7b03167] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The recently introduced pump-probe fragmentation action spectroscopy reveals a unique observation of excited state vibrational coherence (430-460 fs) in the isolated metal complex [Ag2(Cl)(dcpm)2)]+ (dcpm = bis(dicyclohexylphosphino)methane) containing the [Ag2Cl]+ scaffold. After photoexcitation by an 1XMCT transition (260 nm) in an ion trap, an unexpected correlation between specific fragment ions (loss of HCl/Cl- vs loss of dcpm) and the phase of the wave packet is probed (1150 nm). Based on ab initio calculations, we assign the primary electronically excited state and ascribe the observed coherences (72-78 cm-1) to contain predominantly Ag-Ag stretch character. We propose specific probe absorption and vibronic coupling at the classical turning points to switch remarkably early on between the different fragmentation pathways. The overall excited state dynamics are fitted to a multiexponential decay with time constants: 0.2-0.4/3-4/19-26/104-161 ps. These findings open new perspectives for further dynamics investigations and possible applications in photocatalysis.
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Affiliation(s)
- Sebastian V Kruppa
- Department of Chemistry, TU Kaiserslautern , Erwin-Schrödinger-Straße 52-54, 67663 Kaiserslautern, Germany
| | - Florian Bäppler
- Department of Physics, TU Kaiserslautern , Erwin-Schrödinger-Straße 46, 67663 Kaiserslautern, Germany
| | - Christof Holzer
- Institute of Physical Chemistry, Karlsruhe Institute of Technology , Fritz-Haber Weg 2, 76131 Karlsruhe, Germany
| | - Wim Klopper
- Institute of Physical Chemistry, Karlsruhe Institute of Technology , Fritz-Haber Weg 2, 76131 Karlsruhe, Germany
| | - Rolf Diller
- Department of Physics, TU Kaiserslautern , Erwin-Schrödinger-Straße 46, 67663 Kaiserslautern, Germany
| | - Christoph Riehn
- Department of Chemistry, TU Kaiserslautern , Erwin-Schrödinger-Straße 52-54, 67663 Kaiserslautern, Germany
- Landesforschungszentrum OPTIMAS , Erwin-Schrödinger-Straße 46, 67663 Kaiserslautern, Germany
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17
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Niroomand Hosseini F, Nabavizadeh SM, Abu-Omar MM. Which is the Stronger Nucleophile, Platinum or Nitrogen in Rollover Cycloplatinated(II) Complexes? Inorg Chem 2017; 56:14706-14713. [PMID: 29154540 DOI: 10.1021/acs.inorgchem.7b02678] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The rollover cyclometalated platinum(II) complexes [PtMe(2,X'-bpy-H)(PPh3)], (X = 2, 1a; X = 3, 1b; and X = 4, 1c) containing two potential nucleophilic centers have been investigated to elucidate which center is the stronger nucleophile toward methyl iodide. On the basis of DFT calculations, complexes 1b and 1c are predicted reacting with MeI through the free nitrogen donor to form N-methylated platinum(II) complexes, while complex 1a reacts through oxidative addition on platinum to give a platinum(IV) complex, which is in agreement with experimental findings. The reasons for this difference in selectivity for complexes 1a-1c are discussed based on the energy barrier needed for N-methylation versus oxidative addition reactions.
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Affiliation(s)
| | - S Masoud Nabavizadeh
- Department of Chemistry and Biochemistry, University of California , Santa Barbara, California 93106, United States.,Department of Chemistry, College of Sciences, Shiraz University , Shiraz 71467-13565, Iran
| | - Mahdi M Abu-Omar
- Department of Chemistry and Biochemistry, University of California , Santa Barbara, California 93106, United States
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18
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Braun C, Nieger M, Thiel WR, Bräse S. [2.2]Paracyclophanes with N-Heterocycles as Ligands for Mono- and Dinuclear Ruthenium(II) Complexes. Chemistry 2017; 23:15474-15483. [DOI: 10.1002/chem.201703291] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Indexed: 12/13/2022]
Affiliation(s)
- Carolin Braun
- Institute of Organic Chemistry; Karlsruhe Institute of Technology (KIT); Fritz-Haber-Weg 6 76131 Karlsruhe Germany
| | - Martin Nieger
- Department of Chemistry; University of Helsinki; P.O. Box 55 00014 Helsinki Finland
| | - Werner R. Thiel
- Fachbereich Chemie; Technische Universität Kaiserslautern; Erwin-Schrödinger-Straße 54 67663 Kaiserslautern Germany
| | - Stefan Bräse
- Institute of Organic Chemistry; Karlsruhe Institute of Technology (KIT); Fritz-Haber-Weg 6 76131 Karlsruhe Germany
- Institute of Toxicology and Genetics; Karlsruhe Institute of Technology (KIT); Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
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19
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Fizia A, Gaffga M, Lang J, Sun Y, Niedner-Schatteburg G, Thiel WR. Cyclopalladation in the Periphery of a NHC Ligand as the Crucial Step in the Synthesis of Highly Active Suzuki-Miyaura Cross-Coupling Catalysts. Chemistry 2017; 23:14563-14575. [PMID: 28783207 DOI: 10.1002/chem.201702877] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Indexed: 11/11/2022]
Abstract
Starting from 2,4-dichloropyrimidine, 4-(2-dialkylamino)pyrimidinyl functionalized mesitylimidazolium chlorides are accessible in a five-step reaction sequence. Two routes leading to palladium NHC complexes derived from these ligands have been worked out: By transmetalation with the corresponding NHC-AgCl complexes, C,N-coordinated palladium(II) complexes can be obtained. Treatment of palladium dichloride with the imidazolium salts in pyridine and in the presence of K2 CO3 gives cyclometalated and thus C,C-coordinated compounds. The reactivities of all these compounds were investigated in detail as well as their performance in the catalytic Suzuki-Miyaura cross-coupling reaction. It turned out that the C,C-coordinated derivatives exhibit high catalytic activities in the coupling of arylboronic acids with aryl chlorides, which is consistent with the generally accepted mechanistic ideas on substrate activation.
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Affiliation(s)
- Agnes Fizia
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany
| | - Maximilian Gaffga
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany.,Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663, Kaiserslautern, Germany
| | - Johannes Lang
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany.,Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663, Kaiserslautern, Germany
| | - Yu Sun
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany
| | - Gereon Niedner-Schatteburg
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany.,Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663, Kaiserslautern, Germany
| | - Werner R Thiel
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany
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20
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Sluijter SN, Korstanje TJ, van der Vlugt JI, Elsevier CJ. Mechanistic insights into catalytic carboxylic ester hydrogenation with cooperative Ru(II)-bis{1,2,3-triazolylidene}pyridine pincer complexes. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.01.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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21
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Menges FS, Lang J, Nosenko Y, Kerner C, Gaffga M, Ghoochany LT, Thiel WR, Riehn C, Niedner-Schatteburg G. Exploring the Gas-Phase Activation and Reactivity of a Ruthenium Transfer Hydrogenation Catalyst by Experiment and Theory in Concert. J Phys Chem A 2017; 121:4422-4434. [PMID: 28509543 DOI: 10.1021/acs.jpca.7b02459] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This study elucidates structures, activation barriers, and the gas-phase reactivity of cationic ruthenium transfer hydrogenation catalysts of the structural type [(η6-cym)RuX(pympyr)]+. In these complexes, the central ruthenium(+II) ion is coordinated to an η6-bound p-cymene (η6-cym), a bidentate 2-R-4-(2-pyridinyl)pyrimidine ligand (pympyr) with R = NH2 or N(CH3)2, and an anion X = I-, Br-, Cl-, or CF3SO3-. We present infrared multiple-photon dissociation (IR-MPD) spectra of precursors (before HCl loss) and of activated complexes (after HCl loss), which elucidates C-H activation as the key step in the activation mechanism. A resonant two-color IR-MPD scheme serves to record several otherwise "dark" bands and enhances the validity of spectral assignments. We show that collision-induced dissociation (CID)-derived activation energies of the [(η6-cym)RuX(pympyr)]+ (R = N(CH3)2) complexes depend crucially on the anion X. The obtained activation energies for the HX loss correlate well with quantum chemical activation barriers and are in line with the HSAB concept. We further elucidate the reaction of the activated complexes with D2 under single-collision conditions. Quantum mechanical simulations substantiate that the resulting species represent analogues for hydrido intermediates formed after abstraction of H+ and H- from isopropanol, as postulated for the catalytic cycle of transfer hydrogenation by us before.
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Affiliation(s)
- Fabian S Menges
- Department of Chemistry, Yale University , New Haven, Connecticut 06520, United States
| | - Johannes Lang
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Yevgeniy Nosenko
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Christian Kerner
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Maximilian Gaffga
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Leila Taghizadeh Ghoochany
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Werner R Thiel
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Christoph Riehn
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
| | - Gereon Niedner-Schatteburg
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern , 67663 Kaiserslautern, Germany
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22
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Adhikari S, Kaminsky W, Kollipara MR. Pyridyl azine Schiff-base ligands exhibiting unexpected bonding modes towards ruthenium, rhodium and iridium half-sandwich complexes: Synthesis and structural studies. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.03.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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23
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de Boer S, Korstanje TJ, La Rooij SR, Kox R, Reek JNH, van der Vlugt JI. Ruthenium PNN(O) Complexes: Cooperative Reactivity and Application as Catalysts for Acceptorless Dehydrogenative Coupling Reactions. Organometallics 2017; 36:1541-1549. [PMID: 29353952 PMCID: PMC5770139 DOI: 10.1021/acs.organomet.7b00111] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Indexed: 11/30/2022]
Abstract
The novel tridentate PNNOH pincer ligand LH features a reactive 2-hydroxypyridine functionality as well as a bipyridyl-methylphosphine skeleton for meridional coordination. This proton-responsive ligand coordinates in a straightforward manner to RuCl(CO)(H)(PPh3)3 to generate complex 1. The methoxy-protected analogue LMe was also coordinated to Ru(II) for comparison. Both species have been crystallographically characterized. Site-selective deprotonation of the 2-hydroxypyridine functionality to give 1' was achieved using both mild (DBU) and strong bases (KOtBu and KHMDS), with no sign of involvement of the phosphinomethyl side arm that was previously established as the reactive fragment. Complex 1' is catalytically active in the dehydrogenation of formic acid to generate CO-free hydrogen in three consecutive runs as well as for the dehydrogenative coupling of alcohols, giving high conversions to different esters and outperforming structurally related PNN ligands lacking the NOH fragment. DFT calculations suggest more favorable release of H2 through reversible reactivity of the hydroxypyridine functionality relative to the phosphinomethyl side arm.
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Affiliation(s)
- Sandra
Y. de Boer
- Homogeneous, Supramolecular
& Bio-inspired Catalysis, van ’t Hoff Institute for Molecular
Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Ties J. Korstanje
- Homogeneous, Supramolecular
& Bio-inspired Catalysis, van ’t Hoff Institute for Molecular
Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Stefan R. La Rooij
- Homogeneous, Supramolecular
& Bio-inspired Catalysis, van ’t Hoff Institute for Molecular
Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Rogier Kox
- Homogeneous, Supramolecular
& Bio-inspired Catalysis, van ’t Hoff Institute for Molecular
Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Joost N. H. Reek
- Homogeneous, Supramolecular
& Bio-inspired Catalysis, van ’t Hoff Institute for Molecular
Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Jarl Ivar van der Vlugt
- Homogeneous, Supramolecular
& Bio-inspired Catalysis, van ’t Hoff Institute for Molecular
Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
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24
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Transfer hydrogenation of ketones catalyzed by complexes of ruthenium(II) with the heterotridentate [P,N,O] ligands (S)-2-[{2-(diphenylphosphanyl)benzylidene}amino]propan-1-ol, (S)-2-[{2-(diphenylphosphanyl)benzyl}amino]propan-1-ol or the [P,N,S] ligand (S)-2-(dimethylamino)-1-(diphenylphosphino)-3-(methylthio)propane. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2016.12.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Sepúlveda F, Carrión MC, Phillips AD, Jalón FA, Dyson PJ, Manzano BR. Base-Free Transfer Hydrogenation with an Ionic-Liquid-Supported Ruthenium η6-Arene Bis(pyrazolyl)methane Catalyst. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201601207] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Francisco Sepúlveda
- Departamento de Química Inorgánica; Orgánica y Bioquímica; Universidad de Castilla-La Mancha; Facultad de Ciencias y Tecnologías Químicas-IRICA; Avda. C. J. Cela, 10 13071 Ciudad Real Spain
- Institut des Sciences et Ingénierie Chimiques; École Polytechnique Fédérale de Lausanne (EPFL); 1015 Lausanne Switzerland
| | - M. Carmen Carrión
- Departamento de Química Inorgánica; Orgánica y Bioquímica; Universidad de Castilla-La Mancha; Facultad de Ciencias y Tecnologías Químicas-IRICA; Avda. C. J. Cela, 10 13071 Ciudad Real Spain
- Fundación Parque Científico y Tecnológico de Castilla-La Mancha (Fundación PCTCLM); Bulevar Río Alberche s/n 45007 Toledo Spain
| | - Andrew D. Phillips
- School of Chemistry; University College Dublin; D4 Belfield Ireland
- Institut des Sciences et Ingénierie Chimiques; École Polytechnique Fédérale de Lausanne (EPFL); 1015 Lausanne Switzerland
| | - Félix A. Jalón
- Departamento de Química Inorgánica; Orgánica y Bioquímica; Universidad de Castilla-La Mancha; Facultad de Ciencias y Tecnologías Químicas-IRICA; Avda. C. J. Cela, 10 13071 Ciudad Real Spain
| | - Paul J. Dyson
- Institut des Sciences et Ingénierie Chimiques; École Polytechnique Fédérale de Lausanne (EPFL); 1015 Lausanne Switzerland
| | - Blanca R. Manzano
- Departamento de Química Inorgánica; Orgánica y Bioquímica; Universidad de Castilla-La Mancha; Facultad de Ciencias y Tecnologías Químicas-IRICA; Avda. C. J. Cela, 10 13071 Ciudad Real Spain
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26
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Kerner C, Neu JP, Gaffga M, Lang J, Oelkers B, Sun Y, Niedner-Schatteburg G, Thiel WR. Gas-phase reactivity of Cp* group IX metal complexes bearing aromatic N,N′-chelating ligands. NEW J CHEM 2017. [DOI: 10.1039/c7nj01079f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Compounds of the type [(η5-Cp*)M(Cl)(N,N′)]+ bearing N,N′-coordinating ligands show different modes of HCl cleavage depending on the nature of the N,N′-chelate ligand and the metal center.
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Affiliation(s)
- Christian Kerner
- Fachbereich Chemie
- Technische Universität Kaiserslautern
- 67663 Kaiserslautern
- Germany
| | - Jens P. Neu
- Fachbereich Chemie
- Technische Universität Kaiserslautern
- 67663 Kaiserslautern
- Germany
| | - Maximilian Gaffga
- Fachbereich Chemie
- Technische Universität Kaiserslautern
- 67663 Kaiserslautern
- Germany
- State Research Centre OPTIMAS
| | - Johannes Lang
- Fachbereich Chemie
- Technische Universität Kaiserslautern
- 67663 Kaiserslautern
- Germany
- State Research Centre OPTIMAS
| | - Benjamin Oelkers
- Fachbereich Chemie
- Technische Universität Kaiserslautern
- 67663 Kaiserslautern
- Germany
| | - Yu Sun
- Fachbereich Chemie
- Technische Universität Kaiserslautern
- 67663 Kaiserslautern
- Germany
| | - Gereon Niedner-Schatteburg
- Fachbereich Chemie
- Technische Universität Kaiserslautern
- 67663 Kaiserslautern
- Germany
- State Research Centre OPTIMAS
| | - Werner R. Thiel
- Fachbereich Chemie
- Technische Universität Kaiserslautern
- 67663 Kaiserslautern
- Germany
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27
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Kerner C, Lang J, Gaffga M, Menges FS, Sun Y, Niedner-Schatteburg G, Thiel WR. Mechanistic Studies on Ruthenium(II)-Catalyzed Base-Free Transfer Hydrogenation Triggered by Roll-Over Cyclometalation. Chempluschem 2016; 82:212-224. [PMID: 31961548 DOI: 10.1002/cplu.201600526] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Indexed: 11/07/2022]
Abstract
The synthesis of 2-substituted pyridine-pyrimidine ligands and their complexation with arene ruthenium(II) chloride moieties is reported. Depending on the electronic and steric influences of the ligand, the catalysts undergo CH activation by roll-over cyclometalation. This process opens up the route to the catalytic transfer hydrogenation of ketones with isopropanol as the hydrogen source under base-free and mild conditions. Barriers related to the roll-over cyclometalation process can be determined experimentally by collision-induced dissociation ESI mass spectrometry. They are supported by DFT calculations and allow the classification of the ligands according to their electronic and steric properties, which is also in accordance with critical bond parameters derived from X-ray structure data. DFT calculations furthermore reveal that the formation of a ruthenium(II) hydrido species is plausible through β-hydride elimination from isopropanol.
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Affiliation(s)
- Christian Kerner
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany
| | - Johannes Lang
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany.,Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany
| | - Maximilian Gaffga
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany.,Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany
| | - Fabian S Menges
- Department of Chemistry, Yale University, 225 Prospect St., New Haven, CT, 06511, USA
| | - Yu Sun
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany
| | - Gereon Niedner-Schatteburg
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany.,Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany
| | - Werner R Thiel
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse 54, 67663, Kaiserslautern, Germany
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28
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Maidich L, Cinellu MA, Cocco F, Stoccoro S, Sedda M, Galli S, Zucca A. Platinum(II), palladium(II) and gold(III) adducts and cyclometalated derivatives of 6-methoxy-2,2′-bipyridine: A comparative study. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.06.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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29
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Sommer MG, Marinova S, Krafft MJ, Urankar D, Schweinfurth D, Bubrin M, Košmrlj J, Sarkar B. Ruthenium Azocarboxamide Half-Sandwich Complexes: Influence of the Coordination Mode on the Electronic Structure and Activity in Base-Free Transfer Hydrogenation Catalysis. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00424] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Michael G. Sommer
- Institut
für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, D-14195 Berlin, Germany
- Institut
für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70569 Stuttgart, Germany
| | - Sofiya Marinova
- Institut
für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, D-14195 Berlin, Germany
| | - Michael J. Krafft
- Institut
für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70569 Stuttgart, Germany
| | - Damijana Urankar
- Faculty
of Chemistry and Chemical Technology, University of Ljubljana, Večna
pot 113, SI-1000, Ljubljana, Slovenia
| | - David Schweinfurth
- Institut
für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, D-14195 Berlin, Germany
- Institut
für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70569 Stuttgart, Germany
| | - Martina Bubrin
- Institut
für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70569 Stuttgart, Germany
| | - Janez Košmrlj
- Faculty
of Chemistry and Chemical Technology, University of Ljubljana, Večna
pot 113, SI-1000, Ljubljana, Slovenia
| | - Biprajit Sarkar
- Institut
für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, D-14195 Berlin, Germany
- Institut
für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70569 Stuttgart, Germany
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30
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Kerner C, Straub SD, Sun Y, Thiel WR. A Rapid and Additive-Free Ruthenium-Catalyzed Reductive Amination of Aromatic Aldehydes. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600515] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Christian Kerner
- Fachbereich Chemie; TU Kaiserslautern; Erwin-Schrödinger-Str. 54 67663 Kaiserslautern Germany
| | - Sascha-Dominic Straub
- Fachbereich Chemie; TU Kaiserslautern; Erwin-Schrödinger-Str. 54 67663 Kaiserslautern Germany
| | - Y. Sun
- Fachbereich Chemie; TU Kaiserslautern; Erwin-Schrödinger-Str. 54 67663 Kaiserslautern Germany
| | - Werner R. Thiel
- Fachbereich Chemie; TU Kaiserslautern; Erwin-Schrödinger-Str. 54 67663 Kaiserslautern Germany
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31
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Gichumbi JM, Friedrich HB, Omondi B. Application of arene ruthenium(II) complexes with pyridine-2-carboxaldimine ligands in the transfer hydrogenation of ketones. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcata.2016.02.012] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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32
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Castellanos-Blanco N, Arévalo A, García JJ. Nickel-catalyzed transfer hydrogenation of ketones using ethanol as a solvent and a hydrogen donor. Dalton Trans 2016; 45:13604-14. [DOI: 10.1039/c6dt02725c] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a nickel(0)-catalyzed direct transfer hydrogenation (TH) of a variety of alkyl–aryl, diaryl, and aliphatic ketones with ethanol.
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Affiliation(s)
- Nahury Castellanos-Blanco
- Facultad de Química
- Universidad Nacional Autónoma de México
- Circuito Interior
- Ciudad Universitaria
- Mexico City 04510
| | - Alma Arévalo
- Facultad de Química
- Universidad Nacional Autónoma de México
- Circuito Interior
- Ciudad Universitaria
- Mexico City 04510
| | - Juventino J. García
- Facultad de Química
- Universidad Nacional Autónoma de México
- Circuito Interior
- Ciudad Universitaria
- Mexico City 04510
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33
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Jongbloed LS, de Bruin B, Reek JNH, Lutz M, van der Vlugt JI. Reversible cyclometalation at RhI as a motif for metal–ligand bifunctional bond activation and base-free formic acid dehydrogenation. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01505g] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first example of base-free catalytic dehydrogenation of formic acid using reversible cyclometalation at Rh(i) is discussed, using a combination of experimental and computational methods.
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Affiliation(s)
- L. S. Jongbloed
- Homogeneous, Bioinspired & Supramolecular Catalysis
- van 't Hoff Institute for Molecular Sciences
- University of Amsterdam
- 1098 XH Amsterdam
- The Netherlands
| | - B. de Bruin
- Homogeneous, Bioinspired & Supramolecular Catalysis
- van 't Hoff Institute for Molecular Sciences
- University of Amsterdam
- 1098 XH Amsterdam
- The Netherlands
| | - J. N. H. Reek
- Homogeneous, Bioinspired & Supramolecular Catalysis
- van 't Hoff Institute for Molecular Sciences
- University of Amsterdam
- 1098 XH Amsterdam
- The Netherlands
| | - M. Lutz
- Crystal & Structural Chemistry
- Bijvoet Center for Biomolecular Research
- Utrecht University
- The Netherlands
| | - J. I. van der Vlugt
- Homogeneous, Bioinspired & Supramolecular Catalysis
- van 't Hoff Institute for Molecular Sciences
- University of Amsterdam
- 1098 XH Amsterdam
- The Netherlands
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34
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Weismann J, Gessner VH. Catalytic Transfer Hydrogenation with a Methandiide‐Based Carbene Complex: An Experimental and Computational Study. Chemistry 2015; 21:16103-12. [DOI: 10.1002/chem.201502116] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Julia Weismann
- Institut für Anorganische Chemie, Julius‐Maximilians‐Universität Würzburg, Am Hubland, 97074 Würzburg, (Germany) http://www‐anorganik.chemie.uni‐wuerzburg.de/forschungsgruppen/dr_v_gessner/
| | - Viktoria H. Gessner
- Institut für Anorganische Chemie, Julius‐Maximilians‐Universität Würzburg, Am Hubland, 97074 Würzburg, (Germany) http://www‐anorganik.chemie.uni‐wuerzburg.de/forschungsgruppen/dr_v_gessner/
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35
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Stoccoro S, Maidich L, Ruiu T, Cinellu MA, Clarkson GJ, Zucca A. Chiral cyclometalation of 6-(1-phenylbenzyl)-2,2'-bipyridine. Dalton Trans 2015; 44:18001-11. [PMID: 26407175 DOI: 10.1039/c5dt02483h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new bipyridine ligand, 6-(1-phenylbenzyl)-2,2'-bipyridine, has been prepared by a multistep synthesis starting from the corresponding substituted pyridine. The coordinating properties of the new ligand have been tested with two d(8) metal ions, Pt(ii) and Pd(ii), to give the cyclometalated complexes [Pt(N,N,C)Cl] and [Pd(N,N,C)Cl], where N,N,C is a terdentate deprotonated bipyridine containing a new stereogenic carbon atom directly generated by C-H bond activation. The single-crystal of the platinum complex has been solved by X-ray diffraction. DFT calculations confirm the presence of a PtH interaction that stabilizes one of the two possible conformers by 14.7 kJ mol(-1) for Pt and 12.9 kJ mol(-1) for Pd. The energy barrier to pass from one conformer to the other is 25.4 and 23.8 kJ mol(-1) respectively. Under different reaction conditions, regioselective activation of a pyridine C-H bond gave the less common cyclometalated rollover complex [Pt(L-H)Me(DMSO)], which was isolated and characterised.
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Affiliation(s)
- Sergio Stoccoro
- Dipartimento di Chimica e Farmacia, Università degli Studi di Sassari, via Vienna 2, 07100 Sassari, Italy.
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36
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Hackenberger D, Song B, Grünberg MF, Farsadpour S, Menges F, Kelm H, Groß C, Wolff T, Niedner-Schatteburg G, Thiel WR, Gooßen LJ. Bimetallic Cu/Pd Catalysts with Bridging Aminopyrimidinyl Phosphines for Decarboxylative Cross-Coupling Reactions at Moderate Temperature. ChemCatChem 2015. [DOI: 10.1002/cctc.201500769] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Dagmar Hackenberger
- Fachbereich Chemie-Organische Chemie; TU Kaiserslautern; Erwin-Schrödinger-Str., Geb. 54 67663 Kaiserslautern Germany
| | - Bingrui Song
- Fachbereich Chemie-Organische Chemie; TU Kaiserslautern; Erwin-Schrödinger-Str., Geb. 54 67663 Kaiserslautern Germany
| | - Matthias F. Grünberg
- Fachbereich Chemie-Organische Chemie; TU Kaiserslautern; Erwin-Schrödinger-Str., Geb. 54 67663 Kaiserslautern Germany
| | - Saeid Farsadpour
- Fachbereich Chemie-Anorganische Chemie; TU Kaiserslautern; Erwin-Schrödinger-Str., Geb. 54 67663 Kaiserslautern Germany
| | - Fabian Menges
- Fachbereich Chemie-Physikalische Chemie; TU Kaiserslautern; Erwin-Schrödinger-Str., Geb. 52 67663 Kaiserslautern Germany
| | - Harald Kelm
- Fachbereich Chemie-Anorganische Chemie; TU Kaiserslautern; Erwin-Schrödinger-Str., Geb. 54 67663 Kaiserslautern Germany
| | - Cedric Groß
- Fachbereich Chemie-Anorganische Chemie; TU Kaiserslautern; Erwin-Schrödinger-Str., Geb. 54 67663 Kaiserslautern Germany
| | - Timm Wolff
- Fachbereich Chemie-Anorganische Chemie; TU Kaiserslautern; Erwin-Schrödinger-Str., Geb. 54 67663 Kaiserslautern Germany
| | - Gereon Niedner-Schatteburg
- Fachbereich Chemie-Physikalische Chemie; TU Kaiserslautern; Erwin-Schrödinger-Str., Geb. 52 67663 Kaiserslautern Germany
| | - Werner R. Thiel
- Fachbereich Chemie-Anorganische Chemie; TU Kaiserslautern; Erwin-Schrödinger-Str., Geb. 54 67663 Kaiserslautern Germany
| | - Lukas J. Gooßen
- Fachbereich Chemie-Organische Chemie; TU Kaiserslautern; Erwin-Schrödinger-Str., Geb. 54 67663 Kaiserslautern Germany
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37
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Maidich L, Zuri G, Stoccoro S, Cinellu MA, Zucca A. Assembly of symmetrical and unsymmetrical platinum(II) rollover complexes with bidentate phosphine ligands. Dalton Trans 2015; 43:14806-15. [PMID: 25162179 DOI: 10.1039/c4dt02080d] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The reaction of the cyclometalated rollover complex [Pt(bpy-H)(Me)(DMSO)] (bpy-H = cyclometalated 2,2'-bipyridine) with two diphosphines, dppm (1,1-bis(diphenylphosphino)methane) and dppe (1,2-bis(diphenylphosphino)ethane), was investigated. According to the reaction conditions, dppm behaves as a monodentate, bridging or chelated ligand, whereas dppe gave only chelated species. Some aspects of the reactivity of the isolated species were studied, including protonation with [H3O·18-crown-6][BF4] and coordination reactions of mononuclear complexes, obtaining, inter alia, rare examples of unsymmetrical organometallic species with bridging dppm.
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Affiliation(s)
- Luca Maidich
- Dipartimento di Chimica e Farmacia, Università degli Studi di Sassari, via Vienna 2, 07100 Sassari, Italy.
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38
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A kinetic approach to carbon–iodide bond activation by rollover cycloplatinated(II) complexes containing monodentate phosphine ligands. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.01.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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39
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Jongbloed LS, de Bruin B, Reek JNH, Lutz M, van der Vlugt JI. Facile Synthesis and Versatile Reactivity of an Unusual Cyclometalated Rhodium(I) Pincer Complex. Chemistry 2015; 21:7297-305. [DOI: 10.1002/chem.201406463] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 01/23/2015] [Indexed: 12/27/2022]
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40
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Maidich L, Dettori G, Stoccoro S, Cinellu MA, Rourke JP, Zucca A. Electronic and Steric Effects in Rollover C–H Bond Activation. Organometallics 2015. [DOI: 10.1021/om500681u] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Luca Maidich
- Dipartimento
di Chimica e Farmacia, Università degli Studi di Sassari, Via Vienna 2, 07100 Sassari, Italy
- Consorzio Interuniversitario Reattività Chimica e Catalisi (CIRCC), Italy
| | - Gavina Dettori
- Dipartimento
di Chimica e Farmacia, Università degli Studi di Sassari, Via Vienna 2, 07100 Sassari, Italy
- Consorzio Interuniversitario Reattività Chimica e Catalisi (CIRCC), Italy
| | - Sergio Stoccoro
- Dipartimento
di Chimica e Farmacia, Università degli Studi di Sassari, Via Vienna 2, 07100 Sassari, Italy
- Consorzio Interuniversitario Reattività Chimica e Catalisi (CIRCC), Italy
| | - Maria Agostina Cinellu
- Dipartimento
di Chimica e Farmacia, Università degli Studi di Sassari, Via Vienna 2, 07100 Sassari, Italy
- Consorzio Interuniversitario Reattività Chimica e Catalisi (CIRCC), Italy
| | - Jonathan P. Rourke
- Department
of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Antonio Zucca
- Dipartimento
di Chimica e Farmacia, Università degli Studi di Sassari, Via Vienna 2, 07100 Sassari, Italy
- Consorzio Interuniversitario Reattività Chimica e Catalisi (CIRCC), Italy
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41
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Walg SP, Schmidt AD, Schmitz M, Farsadpour S, Lang J, Niebergall M, Sun Y, Roesky PW, Niedner-Schatteburg G, Thiel WR. P,C-bond cleavage in the ligand sphere of a nickel( ii) complex. Dalton Trans 2015; 44:1317-22. [DOI: 10.1039/c4dt02158d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
P,C-bond cleavage at a pyrimidinyl ligand results in a pentacoordinate nickel(ii) complex coordinated by a carbanionic ligand.
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Affiliation(s)
- Simon P. Walg
- Technische Universität Kaiserslautern
- Fachbereich Chemie
- D-67663 Kaiserslautern
- Germany
| | - Alexandra D. Schmidt
- Technische Universität Kaiserslautern
- Fachbereich Chemie
- D-67663 Kaiserslautern
- Germany
| | - Marcus Schmitz
- Technische Universität Kaiserslautern
- Fachbereich Chemie
- D-67663 Kaiserslautern
- Germany
| | - Saeid Farsadpour
- Technische Universität Kaiserslautern
- Fachbereich Chemie
- D-67663 Kaiserslautern
- Germany
| | - Johannes Lang
- Technische Universität Kaiserslautern
- Fachbereich Chemie
- D-67663 Kaiserslautern
- Germany
| | - Mark Niebergall
- Technische Universität Kaiserslautern
- Fachbereich Chemie
- D-67663 Kaiserslautern
- Germany
| | - Yu Sun
- Technische Universität Kaiserslautern
- Fachbereich Chemie
- D-67663 Kaiserslautern
- Germany
| | - Peter W. Roesky
- Karlsruher Institut für Technologie (KIT)
- Institut für Anorganische Chemie
- D-76131 Karlsruhe
- Germany
| | | | - Werner R. Thiel
- Technische Universität Kaiserslautern
- Fachbereich Chemie
- D-67663 Kaiserslautern
- Germany
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42
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Imanbaew D, Nosenko Y, Kerner C, Chevalier K, Rupp F, Riehn C, Thiel W, Diller R. Excited-state dynamics of a ruthenium(II) catalyst studied by transient photofragmentation in gas phase and transient absorption in solution. Chem Phys 2014. [DOI: 10.1016/j.chemphys.2014.03.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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43
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Zucca A, Maidich L, Canu L, Petretto GL, Stoccoro S, Cinellu MA, Clarkson GJ, Rourke JP. Rollover-assisted C(sp2)-C(sp3) bond formation. Chemistry 2014; 20:5501-10. [PMID: 24682987 DOI: 10.1002/chem.201304257] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 01/17/2014] [Indexed: 11/12/2022]
Abstract
Rollover cyclometalation involves bidentate heterocyclic donors, unusually acting as cyclometalated ligands. The resulting products, possessing a free donor atom, react differently from the classical cyclometalated complexes. Taking advantage of a "rollover"/"retro-rollover" reaction sequence, a succession of oxidative addition and reductive elimination in a series of platinum(II) complexes [Pt(N,C)(Me)(PR3)] resulted in a rare C(sp(2))-C(sp(3)) bond formation to give the bidentate nitrogen ligands 3-methyl-2,2'-bipyridine, 3,6-dimethyl-2,2'-bipyridine, and 3-methyl-2-(2'-pyridyl)-quinoline, which were isolated and characterized. The nature of the phosphane PR3 is essential to the outcome of the reaction. This route constitutes a new method for the activation and functionalization of C-H bond in the C(3) position of bidentate heterocyclic compounds, a position usually difficult to functionalize.
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Affiliation(s)
- Antonio Zucca
- Dipartimento di Chimica e Farmacia, Università degli Studi di Sassari, Via Vienna 2, 07100 Sassari (Italy).
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44
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Sarcher C, Farsadpour S, Taghizadeh Ghoochany L, Sun Y, Thiel WR, Roesky PW. Gold(i) complexes with heteroaryl phosphine ligands. Dalton Trans 2014; 43:2397-405. [PMID: 24301091 DOI: 10.1039/c3dt52893f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Christian Sarcher
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie (KIT), Engesserstr. 15, Geb. 30.45, 76131 Karlsruhe, Germany.
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45
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Lang J, Gaffga M, Menges F, Niedner-Schatteburg G. Two-color delay dependent IR probing of torsional isomerization in a [AgL1L2]+complex. Phys Chem Chem Phys 2014; 16:17417-21. [DOI: 10.1039/c4cp02045f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two-color infrared multiple photon dissociation (2c-IR-MPD) spectroscopy with delayed pulses indicates a torsional isomerization in a “ligand–metal–chelate” complex [AgL1L2]+.
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Affiliation(s)
- Johannes Lang
- Fachbereich Chemie and Forschungszentrum OPTIMAS
- Technische Universität Kaiserslautern
- 67663 Kaiserslautern, Germany
| | - Maximilian Gaffga
- Fachbereich Chemie and Forschungszentrum OPTIMAS
- Technische Universität Kaiserslautern
- 67663 Kaiserslautern, Germany
| | - Fabian Menges
- Fachbereich Chemie and Forschungszentrum OPTIMAS
- Technische Universität Kaiserslautern
- 67663 Kaiserslautern, Germany
| | - Gereon Niedner-Schatteburg
- Fachbereich Chemie and Forschungszentrum OPTIMAS
- Technische Universität Kaiserslautern
- 67663 Kaiserslautern, Germany
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