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Synthesis And Catalytic Activity Of Multidentate Phosphine Ligand Stabilised Transition Metal Cluster Complexes
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Book Synopsis Synthesis and Catalytic Activity of Multidentate Phosphine Ligand Stabilised Transition Metal Cluster Complexes by : B. S. Nicholls
Download or read book Synthesis and Catalytic Activity of Multidentate Phosphine Ligand Stabilised Transition Metal Cluster Complexes written by B. S. Nicholls and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis, Chemical and Catalytic Properties of Transition Metal Complexes with Polydentate Phosphine Ligands by : Hon-man Lee
Download or read book Synthesis, Chemical and Catalytic Properties of Transition Metal Complexes with Polydentate Phosphine Ligands written by Hon-man Lee and published by . This book was released on 1997 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis of Transition Metal Carbonyl Clusters with Phosphine Ligands by :
Download or read book Synthesis of Transition Metal Carbonyl Clusters with Phosphine Ligands written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The chemistry of transition metal chalcogenide polynuclear clusters is a rapidly expanding area. The increasing interest is due to the search for structural models and precursors of extended inorganic solids with novel electronic, magnetic and optical properties. Our interest for the synthesis of a variety of transition - etal clusters is due to their use as a model and precursors for materials and catalyst. Synthesis and study of a variety of ligand substituted iron carbonyl cluster has been carried out to understand the reactivity features and structural variety. The main focus has been on the transition metal clusters containing chalcogens which act as bridges between different metal fragments and are helpful in cluster growth reactions and maintains the cluster integrity. A synthetic strategy has been developed to prepare a mixed metal cluster when a dichloromethane solution of [Fe3Y2(CO)6], Y=S, Se, Te and ML4 (M=Pd, L=PPh3) was reacted at room temperature in presence of trimethylamine-N-oxide. Substitution reaction of carbonyl groups by triphenylphosphine and bis(diphenylphosphino)methane ligands results in the formation of different types of trinuclear clusters. Homo metallic cluster as well mixed metal clusters with phosphine ligands has been synthesized by a room temperature reaction and characterized by FTIR, proton and 31P NMR spectroscopy. Some of the transition metal cluster contains chelating phosphine ligands which stabilizes the cluster integrity.
Book Synopsis Synthesis and Catalytic Properties of Transition Metal Complexes with [beta]-cyclodextrin-functionalized Phosphine Ligands by : Yiu-Tung Wong
Download or read book Synthesis and Catalytic Properties of Transition Metal Complexes with [beta]-cyclodextrin-functionalized Phosphine Ligands written by Yiu-Tung Wong and published by . This book was released on 2002 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hybrid Multidentate Phosphine-alkene Ligands for Transition Metal Coordination Chemistry and Catalysis by : Somia Ehsan Bajwa
Download or read book Hybrid Multidentate Phosphine-alkene Ligands for Transition Metal Coordination Chemistry and Catalysis written by Somia Ehsan Bajwa and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of a new class of phosphine-alkene and thio-phosphine-alkene ligands based on a chalcone ferrocene framework, represents the primary focus of this study. The synthesis and characterisation of novel ligands, ferrochalcone 32 and thio-ferrochalcone 33, are described. The related alkene-phosphine ligands, the Lei ligand 17 and novel thio-Lei ligand 46, are further detailed. The coordination chemistry of four ligands (17, 32, 33 and 46) with various transition metals (Pt, Pd, Cu, Rh and Au) has been investigated in a comprehensive spectroscopis study. Single crystal X-ray analysis has been conducted at suitable junctures within the project. A surprising finding was that some solution-state structures were found to be different when studied in the solid state. The AuI complexes-containing the ligands have been successfully used in 1,5-enyne cycloisomerisation reactions. In addition to the coordination chemistry of the novel ligand systems, some interesting findings emerged For example, AuI complex of Lei ligand 17 and monodbaPHOS 74 undergoes an interesting solid-state [2+2] intramolecular cycloaddition transformation, giving cycloadduct, 72 and 77. An interesting finding includes the presence of impurity in commercially available Pd(OAc)2. Cyclopalladation of papaverine was carried out using pure and impure Pd(OAc)2, which resulted in the identification of novel Pd-dimer complex, 86. The result suggest that nitrite contaminants derive from impurities in Pd(OAc)2, and not from the oxidation of acetonitrile mediated by metallic Pd0, explain the formation of PdII-nitrito cyclopalladated products. Photocrystallographic metastable linkage isomerisation and complete conversion to an oxygen-bound nitrito complex 90 was also observed.
Book Synopsis Chiral Phosphorous Based Ligands in Earth-Abundant Transition Metal Catalysis by : Junliang Zhang
Download or read book Chiral Phosphorous Based Ligands in Earth-Abundant Transition Metal Catalysis written by Junliang Zhang and published by Elsevier. This book was released on 2023-05-27 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chiral Phosphorous Based Ligands in Earth-Abundant Transition Metal Catalysis summarizes the most significant progress in the field of chiral phosphine ligand chemistry and a broad range of earth-abundant transition metal/chiral phosphine ligand-catalyzed enantioselective transformations. The book provides an authoritative and in-depth understanding of important topics about asymmetric catalysis based on earth-abundant transition metals/chiral phosphine ligands, making it ideal for organic chemistry researchers working in the field of asymmetric catalysis, synthetic methodologies and total synthesis.The development of new chiral phosphine ligands to achieve precise stereo control in many earth-abundant transition metal-catalyzed reactions is a very important field in organic synthesis, materials science and medicinal chemistry. The asymmetric synthesis promoted by transition metal/chiral phosphine ligands provides one of the most ideal ways to produce valuable optically active chemicals. Includes a discussion of state-of-the-art asymmetric organic reactions mediated by earth-abundant transition metals and chiral phosphine ligands Features the progress and the prospect of chiral phosphine ligands in asymmetric transition metal catalysis Covers the asymmetric reactivity modes of earth-abundant transition metals and phosphine ligands
Book Synopsis Synthesis and Characterization of High Nuclearity Bimetallic Group 8-Group 10 Transition Metal Cluster Complexes by : Sumit Saha
Download or read book Synthesis and Characterization of High Nuclearity Bimetallic Group 8-Group 10 Transition Metal Cluster Complexes written by Sumit Saha and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In past years bimetallic nanoparticle catalysts have been shown to exhibit superior catalytic properties, due to the presence of different metals such that one metal performs a certain role in a catalytic cycle and the other performs another function. Our goal was to synthesize bimetallic cluster complexes containing cheap metals for the application in heterogeneous catalysis. We have reported the reaction of Fe5(C)(CO)15 with Ni(COD)2, in acetonitrile solvent to afford the nickel-iron complex NiFe5(C)(NCMe)(CO)15. In addition, some chemistry with this compound was studied which gave new Fe-Ni carbide clusters with varying Fe-Ni ratios. Similar chemistry was observed with the reaction of Ru5(C)(CO)15 with Ni(COD)2. Electronic unsaturation in transition metal complexes is induced by bulky ligands. The bulky ligands shield the metal center from the approach of large molecules, leaving enough room for the selective approach of small molecules. Bulky ligands such as phosphines, stananes, germanes and N-heterocyclic carbenes stabilize the reactive intermediates of transition metal complexes. Based on this approach, we have synthesized Ru-Ge cluster complexes from the reaction of bulky tertiary butyl germane, ButGeH3 with ruthenium carbonyl complexes. We have also synthesized Ru-Pt bimetallic transition metal cluster complexes with bulky N-heterocyclic carbene ligand. All the new compounds were structurally characterized by single-crystal X-ray diffraction analyses.
Book Synopsis Reactivity and Catalytic Activity of Ligand-stabilized Coordinatively Unsaturated Transition Metal Complexes by : Alan Charles Cooper
Download or read book Reactivity and Catalytic Activity of Ligand-stabilized Coordinatively Unsaturated Transition Metal Complexes written by Alan Charles Cooper and published by . This book was released on 1997 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Catalytic Aspects of Metal Phosphine Complexes by : Elmer C. Alyea
Download or read book Catalytic Aspects of Metal Phosphine Complexes written by Elmer C. Alyea and published by Washington, D.C. : American Chemical Society. This book was released on 1982 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Transition Metal Complexes with P,N-ligands and Silylenes by : Eva Neumann
Download or read book Transition Metal Complexes with P,N-ligands and Silylenes written by Eva Neumann and published by . This book was released on 2006 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis British Reports, Translations and Theses by : British Library. Lending Division
Download or read book British Reports, Translations and Theses written by British Library. Lending Division and published by . This book was released on 1984 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issue for Mar. 1981 contains index for Jan.-Mar. 1981 in microfiche form.
Book Synopsis Transition Metal Complexes with Multidentate Phosphorous/nitrogen Ligands. Synthesis, Characterization and Reactivity by : Sergio Santiago Rozenel
Download or read book Transition Metal Complexes with Multidentate Phosphorous/nitrogen Ligands. Synthesis, Characterization and Reactivity written by Sergio Santiago Rozenel and published by . This book was released on 2011 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract Transition metal complexes with multidentate phosphorous/nitrogen ligands. Synthesis, characterization and reactivity. By Sergio Santiago Rozenel Doctor in Philosophy in Chemistry University of California, Berkeley Professor John Arnold, Chair Chapter 1: Chromium complexes supported by the multidentate monoanionic ligand [N2P2] {H[N2P2] = tBuN(H)SiMe2N(CH2CH2PiPr2)2} are presented, and the activity of these complexes towards ethylene oligomerization/polymerization is examined. The complexes [N2P2]CrCl2 (1) and [N2P2]CrCl (2) polymerized ethylene after activation with MAO. Derivatives of 1 and 2 were synthesized in order to gain insights about the active species in the ethylene oligomerization/polymerization processes. The alkyl complexes [N2P2]CrMe (3), [N2P2]CrCH2SiMe3 (4) and [N2P2]Cr(Cl)CH2SiMe3 (5), the cationic species {[N2P2]CrCl}BF4 (7), {[N2P2]CrCl}BPh4 (8) and {[N2P2]CrCH2SiMe3}BF4 (9), and the Cr(II) complex [N2P2]CrOSO2CF3 (11) were not active ethylene oligomerization/polymerization catalysts in absence of an activator. Reaction of 1 with two equivalents of MeLi led to reduction to 3. However, with one equivalent of MeLi the stable mixed alkyl-halide derivative [N2P2]Cr(Cl)Me (6) was obtained. Reaction of 2 with Red-Al® produced the hydride ([N2P2]Cr)2(ì-H)2 (10), which reacted with CO to produce the Cr(I) complex [N2P2]Cr(CO)2 (12). Reduction of 2 with KC8 in the presence of p-tolyl azide produced the dimeric cis μ-imido ([N2P2]Cr)2(ì-NC7H7)2 (13). A similar reduction in the presence of ethylene resulted in the isolation of the Cr(III) metallacyclohexane compound [N2P2]CrC4H8 (14). Chapter 2: A series of Co, Ni and Cu complexes with the ligand HN(CH2CH2PiPr2)2 (HPNP) has been isolated and their electrochemical behavior investigated by cyclic voltammetry. The nickel complexes [(HPNP¬)NiOTf]OTf and [(HPNP)NiNCCH3](BF4)2 display reversible reductions, as does the related amide derivative (NP2)NiBr. Related copper(I) and cobalt(II) derivatives were isolated and characterized. Addition of piperidine to [(HNP2)NiNCCH3](BF4)2 led to the formation of the new species [(HPNP)Ni(N(H)C(CH3)NC5H10)](BF4)2. Nucleophilic addition of piperidine to acetonitrile to produce HN=C(CH3)NC5H10 was catalyzed by [(HPNP)NiNCCH3](BF4)2. Chapter 3: A series of bimetallic ruthenium complexes [HPNPRu(N2)]2(μ-Cl)2](BF4)2 (2), [(HPNPRu(H2)Cl)2(μ-Cl)2](BF4)2 (3), [(HPNPRu)2(μ-H2NNH2)(μ-Cl)2](BF4)2 (4), [(HPNPRu)2(μ-Cl)2(μ-HNNPh)](BF4)2 (5), [HPNPRu(NH3)(ç2-N2H4)](BF4)Cl (6), [(HNP2Ru)2(μ-Cl)2(μ2-OSO2CF3)]OSO2CF3 (7), [HPNPRu]2(μ-Cl)3]BPh4 (8) and [HPNPRu]2(μ-Cl)3]BF4 (9) were isolated and characterized in the course of reactions aimed at studying the reduction of N2 and hydrazine. Complex 4 produces ammonia catalytically from hydrazine, and complex 2 generates ammonia upon reaction with Cp2Co/HLuBF4. DFT calculations support the idea that the diazene complex formed is more stable than the expected Chatt-type intermediate. Chapter 4: The reduction chemistry of cobalt complexes with the PNP ligand was explored. Reaction of (HPNP)CoCl2 (1) with n-BuLi generated the deprotonated Co(II) product (PNP)CoCl (2), and the Co(I) reduced species (HPNP)CoCl (3). The reaction of complex 2 with KC8 was investigated, where it was found that the products obtained depended upon the inert gas used to carry out the reaction: (PNP)CoN2 (4) under N2, bimetallic complex [(PNP)Co]2 (5) under Ar, and (HPNP)Co(H)3 (8) under H2. Complex 5 reacted with H2 to generate the bimetallic complex [(PNP)CoH]2 (6). With H2, H3SiPh and AgBPh4 complex 3 generated the species (HPNP)CoCl(H)2 (9), (HPNP)CoCl(H)SiH2Ph (10) and [(HPNP)CoCl]BPh4 (11) respectively. DFT calculations were performed to gain insights about the transformations observed.
Book Synopsis Synthesis, Characterization and Catalytic Investigations of Phosphine Stabilized Platinum-gold Cluster Compounds by : Donald Alan Krogstad
Download or read book Synthesis, Characterization and Catalytic Investigations of Phosphine Stabilized Platinum-gold Cluster Compounds written by Donald Alan Krogstad and published by . This book was released on 1996 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Transition Metal-Dinitrogen Complexes by : Yoshiaki Nishibayashi
Download or read book Transition Metal-Dinitrogen Complexes written by Yoshiaki Nishibayashi and published by John Wiley & Sons. This book was released on 2019-05-06 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive book that explores nitrogen fixation by using transition metal-dinitrogen complexes Nitrogen fixation is one of the most prominent fields of research in chemistry. This book puts the focus on the development of catalytic ammonia formation from nitrogen gas under ambient reaction conditions that has been recently repowered by some research groups. With contributions from noted experts in the field, Transition Metal-Dinitrogen Complexes offers an important guide and comprehensive resource to the most recent research and developments on the topic of nitrogen fixation by using transition metal-dinitrogen. The book is filled with the information needed to understand the synthesis of transition metal-dinitrogen complexes and their reactivity. This important book: -Offers a resource for understanding nitrogen fixation chemistry that is essential for explosives, pharmaceuticals, dyes, and all forms of life -Includes the information needed for anyone interested in the field of nitrogen fixation by using transition metal-dinitrogen complexes -Contains state-of-the-art research on synthesis of transition metal-dinitrogen complexes and their reactivity in nitrogen fixation -Incorporates contributions from well-known specialists and experts with an editor who is an innovator in the field of dinitrogen chemistry Written for chemists and scientists with an interest in nitrogen fixation, Transition Metal-Dinitrogen Complexes is a must-have resource to the burgeoning field of nitrogen fixation by using transition metal-dinitrogen complexes.
Book Synopsis Homogeneous Transition Metal Catalyzed Reactions by : William R. Moser
Download or read book Homogeneous Transition Metal Catalyzed Reactions written by William R. Moser and published by . This book was released on 1992 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Preparation, Properties, and Catalytic Activity of Fluorous Phosphine Substituted Transition Metal Carbonyl Complexes by : Thomas Joseph Malosh
Download or read book Preparation, Properties, and Catalytic Activity of Fluorous Phosphine Substituted Transition Metal Carbonyl Complexes written by Thomas Joseph Malosh and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Catalytic Properties of Transition Metal Complexes with [beta]-cyclodextrin-functionalized Phosphine Ligands and Oligomerization of Alkynes with Ruthenium Complexes by : Hoi-Yan Leung
Download or read book Catalytic Properties of Transition Metal Complexes with [beta]-cyclodextrin-functionalized Phosphine Ligands and Oligomerization of Alkynes with Ruthenium Complexes written by Hoi-Yan Leung and published by . This book was released on 2004 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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