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Gurumurthy P, Thavaselvan S, Raja R, Parthasarathy K. Rhodium‐Catalyzed Annulations of 6‐Arylimidazothiazoles with Alkynes through Rollover Dual C−H Bond Activation Strategy. ChemistrySelect 2023. [DOI: 10.1002/slct.202205028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Palanivelu Gurumurthy
- Department of Organic Chemistry University of Madras Guindy Campus Tamilnadu Chennai 025 India
| | - Sampath Thavaselvan
- Department of Organic Chemistry University of Madras Guindy Campus Tamilnadu Chennai 025 India
| | - Rajini Raja
- Department of Organic Chemistry University of Madras Guindy Campus Tamilnadu Chennai 025 India
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2
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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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3
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Niedner‐Schatteburg G, Kappes MM. Advancing Inorganic Coordination Chemistry by Spectroscopy of Isolated Molecules: Methods and Applications. Chemistry 2021; 27:15027-15042. [PMID: 34636096 PMCID: PMC8596414 DOI: 10.1002/chem.202102815] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Indexed: 12/14/2022]
Abstract
A unique feature of the work carried out in the Collaborative Research Center 3MET continues to be its emphasis on innovative, advanced experimental methods which hyphenate mass-selection with further analytical tools such as laser spectroscopy for the study of isolated molecular ions. This allows to probe the intrinsic properties of the species of interest free of perturbing solvent or matrix effects. This review explains these methods and uses examples from past and ongoing 3MET studies of specific classes of multicenter metal complexes to illustrate how coordination chemistry can be advanced by applying them. As a corollary, we will show how the challenges involved in providing well-defined, for example monoisomeric, samples of the molecular ions have helped to further improve the methods themselves thus also making them applicable to many other areas of chemistry.
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Affiliation(s)
| | - Manfred M. Kappes
- Institute of Physical Chemistry and Institute of NanotechnologyKarlsruhe Institute of Technology (KIT)76128KarlsruheGermany
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4
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Nabavizadeh SM, Molaee H, Haddadi E, Niroomand Hosseini F, Hoseini SJ, Abu-Omar MM. Tetranuclear rollover cyclometalated organoplatinum-rhenium compounds; C-I oxidative addition and C-C reductive elimination using a rollover cycloplatinated dimer. Dalton Trans 2021; 50:15015-15026. [PMID: 34609403 DOI: 10.1039/d1dt02086b] [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
The novel tetranuclear Pt(IV)-Re(VII) complex [Pt2Me4(OReO3)2(PMePh2)2(µ-bpy-2H)], 4, is synthesized through the reaction of silver perrhenate with a new rollover cycloplatinated(IV) complex [Pt2Me4I2(PMePh2)2(µ-bpy-2H)], 3. In complex 4, while 2,2'-bipyridine (bpy) acts as a linker between two Pt metal centers, oxygen acts as a mono-bridging atom between Pt and Re centers through an unsupported Pt(IV)-O-Re(VII) bridge. The precursor rollover cycloplatinated(IV) complex 3 is prepared by the MeI oxidative addition reaction of the rollover cycloplatinated(II) complex [Pt2Me2(PMePh2)2(µ-bpy-2H)], 2. Complex 2 shows a metal-to-ligand charge-transfer band in the visible region, which was used to investigate the kinetics and mechanism of its double MeI oxidative addition reaction. Based on the experimental findings, the classical SN2 mechanism was suggested for both steps and supported by computational studies. All complexes are fully characterized using multinuclear NMR spectroscopy and elemental analysis. Attempts to grow crystals of the rollover cycloplatinated(IV) dimer 3 yielded a new dimer rollover cyclometalated complex [Pt2I2(PMePh2)2(µ-bpy-2H)], 5, presumably from the C-C reductive elimination of ethane. The identity of complex 5 was confirmed by single crystal X-ray diffraction analysis.
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Affiliation(s)
- S Masoud Nabavizadeh
- Professor Rashidi Laboratory of Organometallic Chemistry, Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71467-13565, Iran.
| | - Hajar Molaee
- Professor Rashidi Laboratory of Organometallic Chemistry, Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71467-13565, Iran.
| | - Elahe Haddadi
- Professor Rashidi Laboratory of Organometallic Chemistry, Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71467-13565, Iran.
| | | | - S Jafar Hoseini
- Professor Rashidi Laboratory of Organometallic Chemistry, 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, USA.
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5
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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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6
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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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7
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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: 8] [Impact Index Per Article: 2.7] [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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Nährig F, Gemmecker G, Chung JY, Hütchen P, Lauk S, Klein MP, Sun Y, Niedner-Schatteburg G, Sitzmann H, Thiel WR. Complexes of Platinum Group Elements Containing the Intrinsically Chiral Cyclopentadienide Ligand (CpC)−1. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00138] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Florian Nährig
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Gerd Gemmecker
- Technische Universität München, BNMRZ, Fakultät für Chemie, Lichtenbergstr. 4, 85748 Garching, Germany
| | - Jae-Yeon Chung
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Patrick Hütchen
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Sergej Lauk
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Matthias P. Klein
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Yu Sun
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Gereon Niedner-Schatteburg
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
- Research Center OPTIMAS, Erwin-Schrödinger Str. 46, 67663 Kaiserslautern, Germany
| | - Helmut Sitzmann
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Werner R. Thiel
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
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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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10
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Dutta C, Ghorai D, Choudhury J. To "Rollover" or Not? Stereoelectronically Guided C-H Functionalization Pathways from Rhodium-Abnormal NHC Intermediates. ACS OMEGA 2018; 3:1614-1620. [PMID: 31458483 PMCID: PMC6641269 DOI: 10.1021/acsomega.7b01846] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Accepted: 01/26/2018] [Indexed: 06/10/2023]
Abstract
Rollover C-H activation with transition-metal complexes has been found to be a difficult but viable pathway to functionalize potentially chelating molecules, which are otherwise reluctant to react further. However, selective rollover or nonrollover C-H activation pathway depends on the stereoelectronic demand of the associated organometallic intermediate(s). The presented work addresses the above issue on abnormal N-heterocyclic carbene (NHC) platform. Catalytic reactions of pyridine-imidazolium substrates with internal alkynes have been selectively guided toward either rollover or nonrollover C-H functionalization route via fulfilling the steric and electronic demands of the relevant rhodium(III)-abnormal NHC metallacyclic intermediates.
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Dutta C, Choudhury J. C–H activation-annulation on the N-heterocyclic carbene platform. RSC Adv 2018; 8:27881-27891. [PMID: 35542736 PMCID: PMC9084354 DOI: 10.1039/c8ra03799j] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 07/30/2018] [Indexed: 12/15/2022] Open
Abstract
This review highlights the initial development of a new C–H activation–annulation chemistry accessible on the metal–N-heterocyclic carbene platform.
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Affiliation(s)
- Champak Dutta
- Organometallics and Smart Materials Laboratory
- Indian Institute of Science, Education and Research Bhopal
- Bhopal 462 066
- India
| | - Joyanta Choudhury
- Organometallics and Smart Materials Laboratory
- Indian Institute of Science, Education and Research Bhopal
- Bhopal 462 066
- India
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