Download or read book Half sandwich Complexes of Ruthenium Synthesis and Application to Catalysis written by Sun Hwa Lee and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Half sandwich Complexes of Ruthenium Supported by N Heterocyclic Carbene Ligands written by Van Hung Mai and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents the preparation and catalytic reactivity of novel half-sandwich ruthenium complexes supported by N-Heterocyclic Carbene (NHC) ligands. The cationic half-sandwich ruthenium complexes [Cp(IPr)Ru(CH3CN)2]+ show interesting reactivities toward the transfer hydrogenation of different unsaturated substrates, such as ketones, olefins, N-heterocycles, and nitriles. Kinetic studies disclose that a neutral trishydride ruthenium complex is actually involved in the catalytic cycle, playing the role as a resting state. Further investigations on the sub-class of trishydride ruthenium complexes bearing NHC ligands (Cp'(NHC)RuH3) reveal that these complexes have an unusual and great catalytic performance toward the hydrodefluorination (HDF) of fluorinated aromatic and aliphatic compounds. The combined kinetic studies, cross-over experiments and rate law analysis suggest an unusual mechanistic pathway for the Cp*(IPr)RuH3 catalyzed HDF. This study is one of the rare examples where isopropanol is employed as a reducing agent for the metal-mediated HDF reaction. A class of silyl dihydride ruthenium complexes, derived from Cp(IPr)RuH3 are prepared. These silyl hydrido derivatives are great compounds for the study of the inter ligand hypervalent interaction (IHI), an interesting phenomenon for many non-classical silane complexes. This study also suggests that the replacement of phosphines by their isolobally analogous NHC ligands result in stronger IHI interactions in the corresponding compounds. Another type of non-classical interaction was systematically scrutinized in a ii series of new cationic and neutral silane sigma complexes of ruthenium bearing different silyl moieties. These new NHC-supported ruthenium complexes allow for direct comparation with the known phosphine analogues, which reveals interplay of steric and electronic factors on the extent of Si-H complexation to metal and the extent of additional interligand interactions between Ru-Cl and chlorosilane ligand. Finally, new trishydride ruthenium complexes bearing NHC ligands (Cp'(NHC)RuH3) catalyze the H/D exchange reaction of various N-heterocycle substrates; their catalytic performance can be considered as one of the mildest, and most efficient approaches.
Download or read book Synthesis and Characterisation of Half sandwich N6 arene B diketiminato Ruthenium II and Osmium II Complexes and Application in Homogeneous Catalysis written by and published by . This book was released on 2012 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Half sandwich Silane Complexes of Ruthenium and Iron written by Dmitry V. Gutsulyak and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cyclometalated Complexes written by Nicolas Pannetier and published by . This book was released on 2008 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chemistry of cyclometalated half-sandwich complexes of Ru(II) is one of the favorite research topic of the laboratoire de synthèses métallo-induites. We successfully extended the reaction to new metals (Rh(III), Ir(III)). As these complexes showed interesting catalytic properties in enantioselective hydrogen transfer, we carried out high throughput screening tests in collaboration with DSM to enlarge the substrate range. Some catalyst/substrate couples gave very good results according to catalytic activity and selectivity. Promising results were also obtained on imines. Finally, we managed to characterize two active species of the catalytic cycle and we showed by a Michaelis-Menten type kinetic study, that the key step of the hydrogen transfer took place within a catalyst-substrate complex. Each one of the two diastereomeric ruthenium hydrides leads to one enantiomer of the alcohol.
Download or read book Synthesis and Reactivity of Electron rich Ruthenium and Iron Half sandwich Complexes written by Rocco Angelo Paciello and published by . This book was released on 1987 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ruthenium in Organic Synthesis written by Shun-Ichi Murahashi and published by John Wiley & Sons. This book was released on 2006-03-06 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this comprehensive book, one of the leading experts, Shun-Ichi Murahashi, presents all the important facets of modern synthetic chemistry using Ruthenium, ranging from hydrogenation to metathesis. In 14 contributions, written by an international authorship, readers will find all the information they need about this fascinating and extraordinary chemistry. The result is a high quality information source and a indispensable reading for everyone working in organometallic chemistry. From the contents: Introduction (S.-I. Murahashi) Hydrogenation and Transfer Hydrogenation (M. Kitamura and R. Noyori) Oxidations (S.-I. Murahashi and N. Komiya) Carbon-Carbon Bond Formations via Ruthenacycle Intermediates (K. Itoh) Carbon-Carbon Bond Formation via pi-Allylruthenium Intermediates (T. Mitsudo) Olefin Metathesis (R. H. Grubbs) Cyclopropanation (H. Nishiyama) Nucleophilic Addition to Alkynes and Reactions via Vinylidene Intermediates (P. Dixneuf) Reactions via C-H Activation (N. Chatani) Lewis Acid Reactions (E. P. Kundig) Reactions with CO and CO2 (T. Mitsudo) Isomerization of Organic Substrates Catalyzed by Ruthenium Complexes (H. Suzuki) Radical Reactions (H. Nagashima) Bond Cleavage Reactions (S. Komiya)
Download or read book Ruthenium Catalysts and Fine Chemistry written by Christian Bruneau and published by Springer Science & Business Media. This book was released on 2004-06-30 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: With contributions by numerous experts
Download or read book Ruthenium Oxidation Complexes written by William P. Griffith and published by Springer Science & Business Media. This book was released on 2010-11-03 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ruthenium Oxidation Complexes explores ruthenium complexes, particularly those in higher oxidation states, which function as useful and selective organic oxidation catalysts. Particular emphasis is placed on those systems which are of industrial significance. The preparation, properties and applications of the ruthenium complexes are described, followed by a presentation of their oxidative properties and summary of the different mechanisms involved in the organic oxidations (e.g. oxidations of alcohols, alkenes, arenes and alkynes, alkanes, amines, ethers, phopshines and miscellaneous substrates). Moreover, future trends and developments in the area are discussed. This monograph is aimed at inorganic, organic, industrial and catalysis chemists, especially those who wish to carry out specific organic oxidations using catalytic methods.
Download or read book Advances in Metallodrugs written by Shahid Ul-Islam and published by John Wiley & Sons. This book was released on 2020-07-08 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is organized into 12 important chapters that focus on the progress made by metal-based drugs as anticancer, antibacterial, antiviral, anti-inflammatory, and anti-neurodegenerative agents, as well as highlights the application areas of newly discovered metallodrugs. It can prove beneficial for researchers, investigators and scientists whose work involves inorganic and coordination chemistry, medical science, pharmacy, biotechnology and biomedical engineering.
Download or read book Ruthenium II Half sandwich Complexes Bearing Pendant Phosphaferrocene Or Arylphosphines written by Laëtitia Aurore Sarah Jekki and published by . This book was released on 2005 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis Characterization and Reactivity of the Half sandwich Ruthenium II Hydride Complexes of 1 3 5 triaza 7 phosphaadamantane written by Jocelyn Pineda Lanorio and published by . This book was released on 2014 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis Reactivity and Catalytic Applications of Ruthenium Complexes Supported by PNP Ligand written by Yijing Xu and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cationic Ruthenium Complexes in Catalysis written by Stark. Matthew J. (Matthew James) and published by . This book was released on 2018 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: With increasing complexity of metal complexes, it is of worthwhile interest to pursue systematic examinations of ligand modifications to study their impact on the reactivity of a catalyst. To that end, this study aimed to understand the effect electron-withdrawing ligands conveyed to catalytic activity in the etherification of propargylic alcohols and related reactions. A number of half-sandwich ruthenium complexes bearing ligands with varying electron–withdrawing properties were synthesized and structurally characterized. Their electronic and structural properties were investigated utilizing X-ray crystallography, revealing that the series of complexes did not vary significantly in structure. The complexes were studied electronically with cyclic voltammetry, which discovered that the coordinated electron-withdrawing ligands resulted in complexes that were more difficult to oxidize and with possibly decreased electron density at the ruthenium center. All complexes showed catalytic activity in the etherification of propargylic alcohols and in the formation of oxygen-containing heterocycles from propargylic alcohols and diketones. Thermal instability offers an explanation as to why some catalyst systems do not perform very well at elevated temperatures. In a separate study, a more stable tridentate ligand was employed as an architecture for further study in this electronic fine-tuning methodology. A new ruthenium complex bearing a tridendate diacetylpyridine ligand was synthesized, characterized, and employed as catalyst in the coupling of carboxylic acids to terminal alkynes to form enol esters with good regioselectivity. Iron offers a number of advantages in transition metal catalysis, as it is inexpensive and relatively non-toxic. Based on preliminary findings from the Bauer laboratory, an in situ catalyst formed through oxidation of ferrocene boronic acid was found to be catalytically active in the etherification of propargylic acetates. Most interestingly, and opposed to all catalytic reactions performed for this study, the ferrocenium cation does not require elevated temperatures and performs well at room temperature.
Download or read book Open Ruthenocene written by Nadine Langenscheidt-Dabringhausen and published by . This book was released on 2009 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Organometallics and Catalysis written by Manfred Bochmann and published by Oxford University Press, USA. This book was released on 2015 with total page 429 pages. Available in PDF, EPUB and Kindle. Book excerpt: A succinct review of the essential concepts of organometallic chemistry, enriched throughout with examples that demonstrate how our understanding of organometallic chemistry has led to new applications in research and industry - not least in relation to catalysis.
Download or read book Contributions to the Chemistry of Arene Ruthenium Half Sandwich Complexes written by Jadranka Čubrilo and published by . This book was released on 2008 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
