Download or read book Synthesis Structure and Catalytic Activity of Some Platinum Group Metal Complexes written by Tallit Ghaffar and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemistry of the Platinum Group Metals written by F.R. Hartley and published by Elsevier. This book was released on 2013-10-22 with total page 645 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chemistry of platinum group metals is a rapidly expanding commercially important field. It is dominated by the catalytic properties of the metals. They are useful in petrochemical and general chemical plants and are becoming increasingly important as autocatalysts for pollution control. The book covers recent developments in the chemistry of the six platinum group metals, namely, platinum, palladium, rhodium, iridium, ruthenium and osmium. The material falls into three broad areas. Firstly, the occurrence, extraction and use of the metals, especially in catalysis, electrochemistry, energy and electronics. Secondly, organometallic and homogeneous catalytic chemistry and last but not least coordination chemistry including biochemistry and cancer therapy. The work is aimed at scientists in universities and in industry using any of the six platinum group metals in research. It will be useful for those studying the compounds of the metals themselves, and those considering to use either the metals or their complexes and catalysts in their experimental work.
Download or read book Synthesis Reactivity and Catalytic Applications of Ruthenium and Palladium Complexes Supported by New Pincer Ligands written by Morgan C. MacInnis and published by . This book was released on 2011 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT continued: These transfer hydrogenation studies are among the first catalytic studies of silyl-pincer complexes and establish [R-PSiP]M species as viable candidates for catalysis. The synthesis and reactivity of 4- and 5-coordinate RuII complexes featuring the [Cy-PSiP] ligand were explored. Reaction of [Cy-PSiP]H with [(p-cymene)RuCl2]2 in the presence of NEt3 and PCy3 resulted in the formation of ([Cy-PSiP]RuCl)2, which serves as a precursor to a series of unprecedented 4-coordinate, formally 14-electron [Cy-PSiP]RuX (X = NHAr, N(SiMe3)2, OtBu) complexes that feature an unusual trigonal pyramidal geometry at Ru. The reactivity of these novel diamagnetic complexes is described, including the reaction of [Cy-PSiP]RuOtBu with amine-boranes resulting in the formation of rare bis(?-BH) complexes. Computational studies confirmed the key role of the strongly ?-donating silyl group of the Cy-PSiP ligand in facilitating the synthesis of such low-coordinate Ru species and enforcing the unusual trigonal pyramidal geometry. The mechanism of ammonia-borane activation was also examined computationally. Lastly, the synthesis and structural characterization of PdII complexes supported by the pincer-like bis(amino)phosphido ligand [?3-(2-Me2NC6H4)2P]- ([NPN]) is described. Examples of ?1-, ?2-, and ?3-NPN coordination to Pd are described, as is the catalytic activity of ([NPN]PdX)2 (X = Cl, OAc, OTf) complexes in the Heck olefin arylation reaction. In an effort to discourage the formation of phosphido-bridged dinuclear complexes, pre-coordination of the Lewis acid BPh3 to [NPN] was pursued. Upon reaction of [N(P?BPh3)N]K with [PdCl(C3H5)]2, the ?1-allyl complex [?3-N(P?BPh3)N]Pd(?1-C3H5) was isolated, which establishes the coordination of a Lewis acid to the phosphido donor of the [NPN] ligand as a viable strategy for encouraging the formation of mononuclear ?3-NPN complexes.
Download or read book Higher Oxidation State Organopalladium and Platinum Chemistry written by Allan J. Canty and published by Springer. This book was released on 2011-02-25 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: Kyle A. Grice, Margaret L. Scheuermann and Karen I. Goldberg: Five-Coordinate Platinum(IV) Complexes.- Jay A. Labinger and John E. Bercaw: The Role of Higher Oxidation State Species in Platinum-Mediated C-H Bond Activation and Functionalization.- Joy M. Racowski and Melanie S. Sanford: Carbon-Heteroatom Bond-Forming Reductive Elimination from Palladium(IV) Complexes.- Helena C. Malinakova: Palladium(IV) Complexes as Intermediates in Catalytic and Stoichiometric Cascade Sequences Providing Complex Carbocycles and Heterocycles.- Allan J. Canty and Manab Sharma: h1-Alkynyl Chemistry for the Higher Oxidation States of Palladium and Platinum.- David C. Powers and Tobias Ritter: Palladium(III) in Synthesis and Catalysis.- Marc-Etienne Moret: Organometallic Platinum(II) and Palladium(II) Complexes as Donor Ligands for Lewis-Acidic d10 and s2 Centers.
Download or read book Pt Platinum written by Gary J.K. Acres and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: Like most supplement volumes of the platinum-group metal series,Platinum Suppl. Vol. A 1 has been written by an international team of specialists. It comprises technological data of all six platinum-group metals and their technically relevant alloys and compounds. The volume starts with a review on the recovery of the platinum-group metals (23 pages); the next 42 pages are devoted to processes for separating and refining the PGM in order to obtain metals of high purity. The electrodeposition of the PGM and their alloys is treated on 26 pages.The by far most extensive section deals with PGMand their alloys and compounds in catalysis. After a historicalsurvey and alist of important reviewson PGMcatalysis,the catalytic properties of the metals are treated in a general way, followed by unsupported metals and alloys including preparation of catalysts and their reactions in various industrial processes. The role of supported metals and alloys is described in asimilar manner. This isfollowed byan extensive description of the preparation and the reactions of PGM compounds with various nonmetals and their catalytically active role in a number of industrial processes (226 pages). The last chapter (21 pages) is a compilation of data on the medical use of cytostatic platinum compounds. Gelnhausen, December 1985 Kurt Swars IX Table of Contents Page Technology ofthe Platinum-Group Metals. ............................... 1 1 Review on the Recovery ofthe Platinum-Group Metals . 1.1 Historical Perspective , , , . Period of Discovery, 1750 to 1820 , , . First Industrial Period 1820 to 1900 , , , .
Download or read book Supporting Well defined Platinum Group Metals in Metal organic Frameworks for Heterogeneous Catalysis written by Michael T. Payne and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the many chemical industrial processes which require highly selective transformations, homogeneous catalysts are paramount. The effectiveness of molecular organometallic catalysts in particular can be largely attributed to the precise tools available for synthesis and characterization of the ligands and metal complexes, which allow for fine control over electronics and sterics to optimize substrate binding, reaction kinetics, and catalyst stability. Platinum group metals (PGMs; Ru, Os, Rh, Ir, Pd, Pt) enjoy special distinction among transition metal catalysts `for their high selectivity and activity for a number of reactions of interest such as cross-coupling, oligomerization, and hydrofunctionalization. Such homogeneous catalysts still find widespread application at the industrial scale, but the steep cost of these metals places stringent requirements on homogeneous systems for metal recovery. Heterogenization of PGMs thus poses a substantial benefit by enabling efficient catalyst reuse, but it remains a challenge to translate the well-defined nature of molecular catalysts (and thus their high selectivity/activity) to a solid support. In this thesis, I describe the development of methodologies for producing well-defined single-site PGM catalysts on a solid support using metal-organic frameworks (MOFs). MOFs are attractive platforms for the heterogenization of PGM catalysts because, in addition to high porosity and crystallinity, MOFs are structurally tunable at the molecular level, allowing fine synthetic control over active sites and their local environments. Chapter 2 of this thesis describes the development of complementary methodologies for generating well-defined PGM scorpionates on a MOF composed of Tpm-based linkers. Detailed structural studies of Pd(II) installed in the C3[subscript v] scorpionate sites reveals an unusually Pd(II)-N[subscript apical] interaction between the bidentate Pd complex and the third uncoordinated pyrazole arm of the ligand (Pd-N[subscript apical] = 2.501 ± 0.067 Å). Chapter 3 describes a new synthetic strategy, termed "tetrazine click-grafting", which enables facile post-synthetic installation of phosphorus ligands onto MOFs. Lastly, Chapter 4 reports the catalysis of MOF-supported Rh phosphines prepared via tetrazine click-grafting for the hydroformylation of vinylsilanes and simple alkenes, with remarkable selectivity for linear aldehydes.
Download or read book Catalytic and Spectroscopic Properties of Some Platinum Group Metal Complexes written by Millan Mzwandile Mdleleni and published by . This book was released on 1995 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis Structure and Catalytic Properties of Size selected Platinum Nanoparticles written by Simon Armando Mostafa Covone and published by . This book was released on 2010 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of heterogeneous catalysis is well established in chemical synthesis, energy, and environmental engineering applications. Supported Pt nanoparticles have been widely reported to act as catalysts in a vast number of chemical reactions. In this report, the performance of Pt/ZrO2 nanocatalyst for the decomposition of methanol, ethanol, 2-propanol, and 2-butanol is investigated. The potential of each alcohol for the production of H2 and other relevant products in the presence of a catalyst is studied. All the alcohols studied show some decomposition activity below 200°C which increased with increasing temperature. In all cases, high selectivity towards H2 formation is observed. With the exception of methanol, all alcohol conversion reactions lead to catalyst deactivation at high temperatures (T [greater than]250°C for 2-propanol and 2-butanol, T [greater than]325°C for ethanol) due to carbon poisoning. However, long-term catalyst deactivation can be avoided by optimizing reaction conditions such as operating temperature. In addition, the performance of Pt/[gamma]-Al2O3 is evaluated in the oxidation of 2-propanol. Pt nanoclusters of similar size (~1 nm diameter) but different structure (shape) were found to display distinctively different catalytic properties. All the systems studied achieve high conversion (~ 90%) below 100°C. However, flatter particles display a lower reaction onset temperature, demonstrating superior catalytic performance. Acetone, CO2, and water are generated as products indicating that both partial and complete oxidation are taking place. A number of techniques including AFM, XPS, TEM, HAADF-TEM, XAFS as well as packed-bed reactor experiments were used for sample characterization and evaluation of catalytic performance.
Download or read book Transition Metal Reagents and Catalysts written by Jiro Tsuji and published by John Wiley & Sons. This book was released on 2002-08-16 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Im Laufe der vergangenen 35 Jahre wurden unzahlige Synthesewege entwickelt, bei denen Ubergangsmetallkomplexe entweder als Reagenzien oder als Katalysatoren fungieren. Dieses Buch bietet besonders denjenigen Synthesechemikern interessante und moderne Einblicke, die bisher noch nicht mit den vielfaltigen Moglichkeiten der Organometallchemie mit Ubergangsmetallen vertraut sind. Zu wichtigen ubergangsmetallkatalysierten Reaktionen werden Anwendungsbeispiele diskutiert. (01/00)
Download or read book Synthesis Structure and Catalytic Reactivity of Transition Metal Complexes Containing Unsaturated Organosilicon Ligands written by Leo J. Procopio and published by . This book was released on 1991 with total page 794 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis Structure and Catalytic Activity of Titanium Zirconium and Hafnium Containing Polyoxometalates written by Ghada Al-Kadamany and published by . This book was released on 2010 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyoxometalates (POMs) represent by now a well-known class of discrete, molecular metal-oxides, which are attractive due to a large structural and compositional variety combined with a multitude of properties. Vacant (lacunary) polytungstate precursors allow for incorporation of a vast number of electrophiles including transition metals. The resulting products often have properties which render them of interest for potential applications in different areas such as catalysis, medicine and materials science. The exploration of the interaction between lacunary polyoxometalates (POMs) and group 4 (Ti, Zr and Hf) transition metal ions has been mainly driven by the fact that potential products may serve as oxidation catalysts or even as soluble molecular analogues of known Ti and Zr-containing heterogeneous catalysts. This document is a summary of three-year research conducted in this specific area, that is investigation of titanium containing POMs, the chemistry involved, synthesis, solid state and solution characterization and catalytic performance.
Download or read book Allyl Nytrosyl Complexes of the Platinum group Metals written by Michael W. Schoonover and published by . This book was released on 1979 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sulphonate Complexes of the Platinum Group Metals written by Prince Alex Kondoh Harding and published by . This book was released on 1986 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pt Platinum written by Gary J.K. Acres and published by Springer. This book was released on 1985-12-30 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: Like most supplement volumes of the platinum-group metal series,Platinum Suppl. Vol. A 1 has been written by an international team of specialists. It comprises technological data of all six platinum-group metals and their technically relevant alloys and compounds. The volume starts with a review on the recovery of the platinum-group metals (23 pages); the next 42 pages are devoted to processes for separating and refining the PGM in order to obtain metals of high purity. The electrodeposition of the PGM and their alloys is treated on 26 pages.The by far most extensive section deals with PGMand their alloys and compounds in catalysis. After a historicalsurvey and alist of important reviewson PGMcatalysis,the catalytic properties of the metals are treated in a general way, followed by unsupported metals and alloys including preparation of catalysts and their reactions in various industrial processes. The role of supported metals and alloys is described in asimilar manner. This isfollowed byan extensive description of the preparation and the reactions of PGM compounds with various nonmetals and their catalytically active role in a number of industrial processes (226 pages). The last chapter (21 pages) is a compilation of data on the medical use of cytostatic platinum compounds. Gelnhausen, December 1985 Kurt Swars IX Table of Contents Page Technology ofthe Platinum-Group Metals. ............................... 1 1 Review on the Recovery ofthe Platinum-Group Metals . 1.1 Historical Perspective , , , . Period of Discovery, 1750 to 1820 , , . First Industrial Period 1820 to 1900 , , , .
Download or read book British Reports Translations and Theses written by British Library. Document Supply Centre and published by . This book was released on 1996 with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issue for Mar. 1981 contains index for Jan.-Mar. 1981 in microfiche form.
Download or read book Phosphorus Compounds written by Maurizio Peruzzini and published by Springer Science & Business Media. This book was released on 2011-06-10 with total page 477 pages. Available in PDF, EPUB and Kindle. Book excerpt: Each chapter of Phosphorus Compounds: Advanced Tools in Catalysis and Material Sciences have been carefully selected by the editors in order to represent a state-of-the-art overview of how phosphorus chemistry can provide solutions in various fields of applications. The editors have assembled an international array of world-renowned scientists and each chapter is written by experts in the fields of synthetic chemistry, homogeneous catalysis, dendrimers, theoretical calculations, materials science, and medicinal chemistry with a special focus on the chemistry of phosphorus compounds. Phosphorus Compounds: Advanced Tools in Catalysis and Material Sciences is of interest to a general readership ranging from advanced university course students to experts in academia and industry.
