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Mechanistic And Reactivity Studies Of Cationic Iridium Iii Complexes
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Book Synopsis Mechanistic and Reactivity Studies of Cationic Iridium (III) Complexes by : Cathleen Maggie Yung
Download or read book Mechanistic and Reactivity Studies of Cationic Iridium (III) Complexes written by Cathleen Maggie Yung and published by . This book was released on 2004 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mechanistic Studies of Catalytic Carbonylation by :
Download or read book Mechanistic Studies of Catalytic Carbonylation written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Light-Emitting Electrochemical Cells by : Rubén D. Costa
Download or read book Light-Emitting Electrochemical Cells written by Rubén D. Costa and published by Springer. This book was released on 2017-07-31 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the recent achievements towards the next generation of Light-emitting electrochemical cells (LEC). Its first part focus on the definition, history and mechanism of LEC, going then to concepts and challenges and, finally, giving the reader examples of current application of new electroluminescent materials. The chapters are written by different international groups working on LEC.
Book Synopsis Rearrangements and Reactivity Studies of Cationic Silyliridium Complexes and Development of a Method for Isotopically Labelling C-H Bonds Using an Iridium Catalyst by : Steven Raymond Klei
Download or read book Rearrangements and Reactivity Studies of Cationic Silyliridium Complexes and Development of a Method for Isotopically Labelling C-H Bonds Using an Iridium Catalyst written by Steven Raymond Klei and published by . This book was released on 2002 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Iridium(III) Silylene Complexes by : Binh Dang Ho
Download or read book Iridium(III) Silylene Complexes written by Binh Dang Ho and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The scope of this thesis spans the most recent advances in the investigation of chemical bonds of iridium-silicon complexes, in which a metal-bound silyl group behaves as a Z ligand that maintains a dative bond with the metal centre. This contrasts greatly with the case where this group behaves like an X ligand, that is where this silyl group binds to Ir through a covalent bond. Finally, and most interestingly are silylene ligands that in principle should establish a double bond with the Ir centre. The idea of evaluating and tuning the electrophilic character of the silyl moiety and adjuncts its “silylicity” was probed by experimental and theoretical means. To conduct that scheme, a broad range of metal-silane adducts and other metal-silyl complexes were investigated by the computation of metal-silyl interaction energies to outline the established tools that rationalize the bonding relationship that exists between the metal center and a SiR3 moiety. Also, this research revealed a clear separation between cases in which the Z character of the silyl moiety is the best description, and cases that belong to “classical” situations in which the X character dominates. Moreover, we postulated that for metal-silane adducts that possess a low intrinsic silylicity, a high “silylicity” can be triggered by ligand replacement or by changing in the charge of the complex.While working on this topic, we discovered that in the presence of tetrahydrofuran (THF), [(Ir-H)→SiRH2]+ adducts readily convert by H2 gas elimination at sub-ambient temperature into new THF-stabilized metallacyclic Ir(III)-"silylene" complexes. The emergence of metal silylene complexes via sequential H-Si activations followed by the spontaneous release of H2 featured in this thesis is unique. The primary goal of this thesis finally was to fully characterize those elusive complexes by NMR spectroscopy analyses and X-ray diffraction analysis. Furthermore, theoretical investigations (static DFT-D reaction-energy profiling, ETS-NOCV) and NMR kinetic studies were utilized to demonstrate the role of THF which facilitated H2 elimination. Coupled with silylene metal complex chemistry mentioned above, cationic iridacycle 1b is of interesting catalytic reactivity toward nitro arenes, which can perform the nitro reduction in arenes to give aniline type products.In crafting a new development of this chemistry, it is safe to hypothesize that cationic hydrido-Ir(III)-silylium species, whose catalytic reactivity is of significant correlation with the extend of polarization of the molecule can enhance in the key intermediates the molecule polarization, and therefore increase its catalytic reactivity. Such polarization that occurs already in the Ir-silane adduct stems from the electropositivity of Si centre. Keeping the main ligand backbone constant, introduction of a fluoro substituent can improve the polarization of the same molecule and by way of consequence increase its catalytic reactivity.As expected, F-1a also displays remarkable catalytic reactivity toward a benchmark test reaction that can be followed by piezometry, i.e. the O-dehydrosilylation of alcohols at room temperature with Et3SiH. A hydrido-Ir(III)-silylium intermediate crystal was trapped as well following on a reaction with Et2SiH. In conclusion, based on the discovery of hydrido-Ir(III)-silylium intermediates associated with a comprehensive study of their reactivity and catalytic performance, this thesis has taken steps to advance knowledge of Ir-silicon complexes by synthesis and the full structural characterization of notoriously elusive metal silylene complexes. Also, sophisticated computational methods have been employed to shed light on the mechanism of conversion of Ir-silane adducts into silylenes of which a great number were trapped by reactive recrystallization and subsequently characterized by X-ray diffraction analysis.
Book Synopsis Iridium Complexes in Organic Synthesis by : Luis A. Oro
Download or read book Iridium Complexes in Organic Synthesis written by Luis A. Oro and published by John Wiley & Sons. This book was released on 2008-12-03 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ranging from hydrogenation to hydroamination, cycloadditions and nanoparticles, this first handbook to comprehensively cover the topic of iridium in synthesis discusses the important advances in iridium-catalyzed reactions, namely the use of iridium complexes in enantioselective catalysis. A must for organic, complex and catalytic chemists, as well as those working with/on organometallics.
Book Synopsis Synthesis and Reactivity of Cationic Iridium(III) Complexes by : David Matthew Tellers
Download or read book Synthesis and Reactivity of Cationic Iridium(III) Complexes written by David Matthew Tellers and published by . This book was released on 2001 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthetic and Mechanistic Studies of Carbon-hydrogen Bond Activation by Iridium(III) Complexes and Development of a Transition Metal Catalyzed Alkene Aziridination Reaction by : Peter James Alaimo
Download or read book Synthetic and Mechanistic Studies of Carbon-hydrogen Bond Activation by Iridium(III) Complexes and Development of a Transition Metal Catalyzed Alkene Aziridination Reaction written by Peter James Alaimo and published by . This book was released on 1999 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Iridium(III) in Optoelectronic and Photonics Applications by : Eli Zysman-Colman
Download or read book Iridium(III) in Optoelectronic and Photonics Applications written by Eli Zysman-Colman and published by John Wiley & Sons. This book was released on 2017-03-07 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fundamental photophysical properties of iridium(III) materials make this class of materials the pre-eminent transition metal complex for use in optoelectronic applications. Iridium(III) in Optoelectronic and Photonics Applications represents the definitive account of photoactive iridium complexes and their use across a wide variety of applications. This two-volume set begins with an overview of the synthesis of these complexes and discusses their photophysical properties. The text highlights not only mononuclear complexes but also the properties of multinuclear and polymeric iridium-based materials and the assembly of iridium complexes into larger supramolecular architectures such as MOFs and soft materials. Chapters devoted to the use of these iridium-based materials in diverse optoelectronic applications follow, including: electroluminescent devices such as organic light emitting diodes (OLEDs) and light-emitting electrochemical cells (LEECs); electrochemiluminescence (ECL); bioimaging; sensing; light harvesting in the context of solar cell applications; in photoredox catalysis and as components for solar fuels. Although primarily targeting a chemistry audience, the wide applicability of these compounds transcends traditional disciplines, making this text also of use to physicists, materials scientists or biologists who have interests in these areas.
Book Synopsis Syntheses, Characterization, and Reactivity Studies of Iridium(III)-hydride and Iridium(I) Complexes with Tertiary Triphosphine Ligands by : Chihae Yang
Download or read book Syntheses, Characterization, and Reactivity Studies of Iridium(III)-hydride and Iridium(I) Complexes with Tertiary Triphosphine Ligands written by Chihae Yang and published by . This book was released on 1984 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mechanistic and Reactivity Studies of Organometallic Supramolecular Host-guest Assemblies by : Dennis H. Leung
Download or read book Mechanistic and Reactivity Studies of Organometallic Supramolecular Host-guest Assemblies written by Dennis H. Leung and published by . This book was released on 2006 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reactive Intermediates by : Leonardo S. Santos
Download or read book Reactive Intermediates written by Leonardo S. Santos and published by John Wiley & Sons. This book was released on 2009-11-04 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last two decades there has been considerable growth in the development of electrospray ionization mass spectrometry (ESI-MS) as a practical method in the study of reaction mechanisms. This method allows the interception and characterization of key intermediates, either as transient species or as protonated/deprotonated forms of neutral species by API-MS. The outstanding features and advantages of ESI-MS make it one of the most suitable tools for the fast screening of intermediates directly from solution, providing hitherto unavailable chemical information to organic chemists. This monograph provides an overview of the mechanisms involved in ESI-MS, the historical perspectives before looking further in-depth at specific reactions and intermediates. Written by researchers in the field, this book is an unique resource for the understanding of this cutting-edge technique.
Book Synopsis Metallacycle and Metallacycle-carbene Complexes by : Lin Pu
Download or read book Metallacycle and Metallacycle-carbene Complexes written by Lin Pu and published by . This book was released on 1990 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthetic and Mechanistic Studies of (pentamethylcyclopentadienyl) Iridium Alkoxide Complexes by : Linda Jean Newman
Download or read book Synthetic and Mechanistic Studies of (pentamethylcyclopentadienyl) Iridium Alkoxide Complexes written by Linda Jean Newman and published by . This book was released on 1986 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mechanistic Studies of New Bond Forming Reactions Mediated by Oxorhenium(V) and Cp*Iridium Complexes by : Leanna Kate Robbins
Download or read book Mechanistic Studies of New Bond Forming Reactions Mediated by Oxorhenium(V) and Cp*Iridium Complexes written by Leanna Kate Robbins and published by . This book was released on 2016 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis I. Synthesis and Reactivity of Chiral Iridium(III) and Rhodium(III) Complexes by : Stuart Edward Smith
Download or read book I. Synthesis and Reactivity of Chiral Iridium(III) and Rhodium(III) Complexes written by Stuart Edward Smith and published by . This book was released on 2008 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis REACTIVITY AND EQUILIBRIUM THERMODYNAMIC STUDIES OF IRIDIUM PORPHYRINS IN WATER AND ALCOHOL by : Salome Bhagan
Download or read book REACTIVITY AND EQUILIBRIUM THERMODYNAMIC STUDIES OF IRIDIUM PORPHYRINS IN WATER AND ALCOHOL written by Salome Bhagan and published by . This book was released on 2012 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmental and energy issues have stimulated renewed interest in utilizing both water and methanol as reagents and reaction mediums. Our current interest is to evaluate the scope of group nine organometallics and establish thermodynamic parameters for their reactivity in aqueous solvent. A comprehensive thermodynamic database for a wide scope of organo-rhodium transformations in a range of reaction media including benzene, water, and methanol has been well established by our group. Aqueous solutions of rhodium porphyrin have been determined to manifest an exceptional range of substrate reactions with carbon monoxide, dihydrogen, olefins, methanol and aldehydes. This study will focus on expansion of the thermodynamic database to all the group nine metals, particularly the iridium porphyrin systems in both water and methanol. Substrate reactivity and development of new mechanistic strategies for the conversion of carbon monoxide, alkanes, and alkenes to organic oxygenates are central objectives. Water/Methanol soluble porphyrin iridium complexes including iridium tetrakis(p-sulfonatophenyl)porphyrin ((TSPP)Ir) and iridium tetrakis(3,5-sulfonatomesityl)porphyrin ((TMPS)Ir) derivatives can be prepared by sulfonation of tetra phenyl porphyrin (H2TPP) and tetra mesityl porphyrin (H2TMP). The reactivity of dihydrogen with aqueous solutions of iridium(III) tetrakis(p-sulfonatophenyl)porphyrin ((TSPP)Ir(III)) complexes produce equilibrium distributions between six iridium species including iridium hydride ([(TSPP)Ir-D(D2O)]-4), iridium(I) ([(TSPP)IrI(D2O)]-5), and iridium (II) dimer ([(TSPP)IrII(D2O)]2-8) complexes. Each of these types of iridium porphyrin species including Ir(I), Ir(II), Ir(III), Ir-H, and Ir-OH function as precursors for a range of organometallic substrate reactions. A primary objective is to define the quantitative relationships pertaining to the distribution of species in aqueous solution as a function of the dihydrogen and hydrogen ion concentrations through direct measurement of five equilibrium constants along with free energy changes of coordinated water and free energy changes of reactions of dihydrogen in water. Reactivity, kinetics and evaluation of equilibrium thermodynamics, including the reactions of iridium hydroxide and methoxide with olefins to produce beta-hydroxyalkyl and beta-methoxyalkyl complexes, reactions of iridium hydride and olefins to produce iridium alkyl complexes, and reactions of iridium hydride with carbon monoxide to produce iridium formyl [Ir-CHO] complexes are also objectives of this research. Another research goal is the design and synthesis of diporphyrin ligands that form dimetal complexes capable of preorganizing transition states for substrate reactions that involve two metal centers. Dirhodium dimetalloradical complexes are observed to manifest large rate increases over mono-metalloradical activation reactions of hydrogen, methane, and other small molecule substrates. In this study, synthesis of diporphyrin (bisporphyrin) ligands and other ligands which will permit dimetallo complexes like anti-aromatic [14]annulene and low steric porphine ligands will be also be examined.