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Author : Jack Scott Wiley
Publisher :
ISBN 13 :
Total Pages : 286 pages
Book Rating : 4.:/5 (438 download)
Download or read book C-H Bond Activation in Iridium Complexes written by Jack Scott Wiley and published by . This book was released on 1999 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Karen I. Goldberg
Publisher : ACS Symposium
ISBN 13 : 9780841238497
Total Pages : 0 pages
Book Rating : 4.2/5 (384 download)
Download or read book Activation and Functionalization of C-H Bonds written by Karen I. Goldberg and published by ACS Symposium. This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Activation and Functionalization of C-H Bonds explores recent developments in the reaction chemistry of solution-phase transition-metal based systems with simple hydrocarbons and with more complex organic molecules. More than 20 internationally leading research groups contributed to this volume, and their chapters cover such topics as fundamental theoretical and mechanistic studies of C-H bond activation by metal complexes, catalytic systems for alkane functionalization, and new applications in synthetic organic chemistry. An introductory chapter offers an overview of stoichiometric and catalytic reactions of C-H bonds with transition metal complexes. The C-H bond is the most widespread linkage in organic chemistry, present in virtually every organic molecule. Unfortunately, C-H bonds are famously resistant to selective chemical transformations. The development of methods for their selective transformations has enormous potential value in fields ranging from the chemistry of fuels (for example, the conversion of methane to methanol) to the synthesis of the most complex organic molecules.
Author : Peter James Alaimo
Publisher :
ISBN 13 :
Total Pages : 556 pages
Book Rating : 4.:/5 (34 download)
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:
Author : Kate E. Allen
Publisher :
ISBN 13 :
Total Pages : 173 pages
Book Rating : 4.:/5 (879 download)
Download or read book Synthesis of Electrophilic Rhodium and Iridium Complexes and Investigation of Reactivity for C-H Bond Activation and Functionalization written by Kate E. Allen and published by . This book was released on 2013 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: Direct methods for the transformation of alkanes into alcohols, alkenes, amines and other functionalized products would have a great impact on industrial processes. In this thesis the work described is aimed at developing electrophilic Rh and Ir systems to promote C-H bond activation and functionalization of alkanes and arenes. Several approaches have been taken to prepare the target complex [Tp*Ir(OH2)3]+ (Tp* = hydridotris(3,5-dimethylpyrazoyl)borate). While this species has not been synthesized, C-N coupling between ethylene and N-iodosuccinimide has been observed during the course of this study and is promoted by Tp*Ir(C2H4)2. Electrophilic Rh and Ir complexes bearing dimethylbutadiene (DMB) ligands have been found to be poor species for C-H activation due to low stability at elevated temperatures. Interestingly, formation of the unique five-coordinate [(DMB)Ir(COE)Cl]2 dimer has been observed. Alkane dehydrogenation using ([superscript dm]Phebox)Ir(OAc)2(OH2) ([superscript dm]Phebox = 2,6-bis(4,4-dimethyloxazolinyl)-3,5-dimethylphenyl) is promoted at 200 °C and results in quantitative formation of olefin and (([superscript dm]Phebox)Ir(OAc)H. At early reaction times 1-octene is the major product, supporting terminal C-H activation by the Ir center. Oxygen can be utilized in this system as a hydrogen acceptor to promote regeneration of the Ir bisacetate species at room temperature. This is the first example of regeneration of a complex for dehydrogenation using oxygen. Unfortunately, the system is not catalytic as the reaction with oxygen is not compatible with the high temperatures required for C-H bond activation. In order to expand the number of examples of alkane dehydrogenation at Ir[superscript III] centers, a second system utilizing the [superscript tBu]NOCON ([superscript tBu]NOCON = 4,6-di-tert-butyl-(1,3-bis(2-pyridyloxy)benzene)) pincer ligand has been developed. Complexes ([superscript tBu] NOCON)M(OAc)2OH2 (M = Rh or Ir) were synthesized and explored for C-H bond functionalization. The Ir analogue promotes alkane dehydrogenation at 200 °C, but is not stable under the reaction conditions. Arene functionalization has also been explored using Ir-aryl complexes. The product of benzene C-H activation, (Phebox)Ir(OAc)Ph has been investigated for arene functionalization using hypervalent iodide reagents and CO. Reactions utilizing C6F5I(TFA)2 are promising and may potentially yield functionalized arene. Coordination of CO to the Ir center has been observed and isomerization of the trans product, ([superscript dm]Phebox)Ir(CO)(OAc)Ph, occurs at room temperature to yield the cis isomer ([superscript dm] Phebox)Ir(OAc)(CO)Ph.
Author : Agus Abhi Purwoko
Publisher :
ISBN 13 :
Total Pages : 486 pages
Book Rating : 4.:/5 (226 download)
Download or read book Photochemistry and C-H Bond Activation Reactions of Pyrazolyl Complexes of Rhodium and Iridium in Hydrocarbon Solutions written by Agus Abhi Purwoko and published by . This book was released on 1994 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Cathleen Maggie Yung
Publisher :
ISBN 13 :
Total Pages : 258 pages
Book Rating : 4.:/5 (35 download)
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:
Author : Luis A. Oro
Publisher : John Wiley & Sons
ISBN 13 : 3527623086
Total Pages : 424 pages
Book Rating : 4.5/5 (276 download)
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.
Author : David Alan Laviska
Publisher :
ISBN 13 :
Total Pages : 455 pages
Book Rating : 4.:/5 (856 download)
Download or read book Activation of Aryl C-H and C-X Bonds by a Pincer-ligated 'PCP' Iridium Complex written by David Alan Laviska and published by . This book was released on 2013 with total page 455 pages. Available in PDF, EPUB and Kindle. Book excerpt: The activation of carbon-hydrogen (C-H) bonds mediated by transition metal complexes is a fundamental step in a vast array of chemical transformations and industrial processes. As such, research into the understanding of the factors governing both efficiency and selectivity of these reactions has been intense. The work presented in this thesis comprises results of experiments designed to evaluate the ability of a pincer-ligated iridium complex to activate the C-H bonds of several classes of aryl substrates. The pincer-ligated iridium fragment (PCP)Ir (PCP = {?3-2,6-bis[(di-tert-butylphosphino)methyl]phenyl}) rapidly and reversibly adds the C-H bond of benzene, giving a kinetically labile addition product. The kinetics and thermodynamics of C-H activation of a series of halogen-, alkyl-, and trifluoromethyl-substituted arenes were studied with a particular focus on determining whether "directing" effects play a significant role. In regard to electronic effects, it was observed that electron withdrawing aryl substituents favor C-H activation. Products of C-H activation ortho to weakly or non-coordinating substituents (e.g., Cl, Br, CF3) are kinetically more stable than those of the meta- and para-substituted analogs, due to steric crowding in the transition state for addition and elimination. However, there is no thermodynamic preference for the ortho-substituted complexes. In addition to C-H activation, (PCP)Ir also activates C-X bonds (X = Cl, Br) under certain conditions, yielding product mixtures through a mechanism that remains unclear. Several series of polycyclic aromatic substrates (naphthalenes, biphenyls, bipyridines, and associated tricyclic analogs) were also studied, giving insight into the utility of aryl C-H activation and preferred binding modes of the (PCP)Ir fragment. Not surprisingly, steric effects play a significant role in the regioselectivity of polycyclic aromatic C-H bond activation by (PCP)Ir. Cyclometalation reactions resulting from single or double C-H activation processes yield particularly stable products. Additional results included an unexpected C-C activation, and several products stabilized by heteroatom (N, O) coordination to iridium. Activation of large polycycles like terpyridine yielded stable,?2 chelates that may be of value in research on organic light emitting diodes (OLEDs). Finally, several congested (PCP)Ir dimers were synthesized by taking advantage of the remarkable stability of the products from cyclometalation to the (PCP)Ir complex.
Author : David Matthew Tellers
Publisher :
ISBN 13 :
Total Pages : 414 pages
Book Rating : 4.:/5 (34 download)
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:
Author : Pierre H. Dixneuf
Publisher : Springer
ISBN 13 : 3319246305
Total Pages : 269 pages
Book Rating : 4.3/5 (192 download)
Download or read book C-H Bond Activation and Catalytic Functionalization I written by Pierre H. Dixneuf and published by Springer. This book was released on 2015-12-18 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series Topics in Organometallic Chemistry presents critical overviews of research results in organometallic chemistry. As our understanding of organometallic structure, properties and mechanisms increases, new ways are opened for the design of organometallic compounds and reactions tailored to the needs of such diverse areas as organic synthesis, medical research, biology and materials science. Thus the scope of coverage includes a broad range of topics of pure and applied organometallic chemistry, where new breakthroughs are being achieved that are of significance to a larger scientific audience. The individual volumes of Topics in Organometallic Chemistry are thematic. Review articles are generally invited by the volume editors. All chapters from Topics in Organometallic Chemistry are published OnlineFirst with an individual DOI. In references, Topics in Organometallic Chemistry is abbreviated as Top Organomet Chem and cited as a journal.
Author : Pierre H. Dixneuf
Publisher : Springer
ISBN 13 : 3319293192
Total Pages : 213 pages
Book Rating : 4.3/5 (192 download)
Download or read book C-H Bond Activation and Catalytic Functionalization II written by Pierre H. Dixneuf and published by Springer. This book was released on 2016-03-10 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series Topics in Organometallic Chemistry presents critical overviews of research results in organometallic chemistry. As our understanding of organometallic structure, properties and mechanisms increases, new ways are opened for the design of organometallic compounds and reactions tailored to the needs of such diverse areas as organic synthesis, medical research, biology and materials science. Thus the scope of coverage includes a broad range of topics of pure and applied organometallic chemistry, where new breakthroughs are being achieved that are of significance to a larger scientific audience. The individual volumes of Topics in Organometallic Chemistry are thematic. Review articles are generally invited by the volume editors. All chapters from Topics in Organometallic Chemistry are published OnlineFirst with an individual DOI. In references, Topics in Organometallic Chemistry is abbreviated as Top Organomet Chem and cited as a journal.
Author : William B. Tolman
Publisher : John Wiley & Sons
ISBN 13 : 3527609377
Total Pages : 382 pages
Book Rating : 4.5/5 (276 download)
Download or read book Activation of Small Molecules written by William B. Tolman and published by John Wiley & Sons. This book was released on 2006-12-13 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first to combine both the bioinorganic and the organometallic view, this handbook provides all the necessary knowledge in one convenient volume. Alongside a look at CO2 and N2 reduction, the authors discuss O2, NO and N2O binding and reduction, activation of H2 and the oxidation catalysis of O2. Edited by the highly renowned William Tolman, who has won several awards for his research in the field.
Author : Hongmei Yuan
Publisher :
ISBN 13 :
Total Pages : 183 pages
Book Rating : 4.:/5 (13 download)
Download or read book Synthesis and Characterization of Group VIII & IX Transition Metal Complexes and Their Application in C-H Bond Activation and Hydrogen Transformation written by Hongmei Yuan and published by . This book was released on 2018 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A cobalt analogue of Cp*Co(PMe3)Me(OTf) (Cp* = 1, 2, 3, 4, 5 - pentamethylcyclopenta-dienyl, OTf = OSO2CF3), in Chapter 2, was attempted to be synthesized and studied for electrophilic C-H bond activation. Three new cobalt complexes Cp*Co(PMe3)(Me)2, Cp*Co(PMe3)(OTf)2 and Cp*Co(PMe3)(Me)(I) were synthesized. The 1H NMR spectrum showed a new material formed after mixing Cp*Co(PMe3)(Me)2 and Cp*Co(PMe3)(OTf)2 in 1:1 ratio. In Chapter 3, five carboxylate ligated iridium complexes (dmPhebox)Ir(O2CR)2(H2O) (R = -CH3(known compound), -CH2CH3, -CMe3, - CH2C6H5, -CH=CMe2) were designed and synthesized to understand the carboxylate ligand effects on the reactivity of the complex for alkane dehydrogenation. Results from the kinetic study showed that different R groups of the carboxylate iridium complexes can affect the reactivity with octane in the ??H elimination step. The rate constants for octane formation with different carboxylate ligands follow the order R = -CH=CMe2 > -CMe3 > -CH2CH3 > -CH3 > -CH2C6H5. In contrast, there is no significant effect of carboxylate ligand on the rate of the C-H activation step at 160 ʻC. These experimental results support the findings in the previously reported density functional theory (DFT) study of the (dmPhebox)Ir complex in alkane C-H activation. In Chapter 4,5 and 6, hydrogen transformation during the dehydrogenation and hydrogenation of N-heterocycles with a cobalt pincer catalyst, hydrogenation of alkenes with Fe(II) precursors, and hydrogenation of alcohols and dehydrogenation of ketones with a Cp*Rh(III) catalyst were investigated. The results of the acceptorless, reversible dehydrogenation and hydrogenation of N-heterocycles suggests a bifunctional dehydrogenation pathway and a non-bifunctional hydrogenation mechanism. The iron catalysts described in Chapter 5 operate via a metal-ligand cooperative pathway via a stepwise hydride transfer and then proton transfer mechanism. The Cp*Rh(III) catalysts in Chapter 6 decompose upon heating to give nanoparticles."--Pages xi-xii.
Author : Amanda Jane Kunin
Publisher :
ISBN 13 :
Total Pages : 398 pages
Book Rating : 4.:/5 (168 download)
Download or read book Probing Fundamental Aspents of H-H and C-H Bond Activation Using Iridium and Rhodium Phosphine Complexes written by Amanda Jane Kunin and published by . This book was released on 1986 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mira T. Kanzelberger
Publisher :
ISBN 13 :
Total Pages : 298 pages
Book Rating : 4.:/5 (793 download)
Download or read book C-H Bond Activation and Related Chemistry of "PCP-Pincer" -ligated Iridium written by Mira T. Kanzelberger and published by . This book was released on 2004 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Daniel Anthony Frasco
Publisher :
ISBN 13 :
Total Pages : 265 pages
Book Rating : 4.:/5 (99 download)
Download or read book Synthesis and Characterization of Iridium Acetate Complexes for the Activation and Functionalization of C-H Bonds written by Daniel Anthony Frasco and published by . This book was released on 2015 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Gaurav Bhalla
Publisher :
ISBN 13 :
Total Pages : 578 pages
Book Rating : 4.:/5 (76 download)
Download or read book Activation and Functionalization of C-H Bonds Catalysed by Oxygen Ligated Iridium Metal Complexes written by Gaurav Bhalla and published by . This book was released on 2005 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:
