Author: Nichola Sian MoorePublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Studies of Nickel (II) Diphosphine Complexes Directed Towards Carbon Monoxide/ethene Catalysis
Author: Nichola Sian MooreCarbon Dioxide Utilization
Author: Ioana KnopfPublisher:
ISBN:
Category :
Languages : en
Pages : 308
Book Description
Molybdate, a molecular metal oxide, readily binds CO2 at room temperature to produce a robust monocarbonate complex, [MoO3(k2-CO3)]2−. In the presence of excess CO2, a pseudo-octahedral dioxo dicarbonate complex, [MoO3(k2-CO3)2]2−, is formed. The monocarbonate [MoO3(k2-CO3)]2− reacts with triethylsilane to produce formate together with silylated molybdate. A different system investigated in the context of CO2 reduction to formate was sodium borohydride. The uptake of three equivalents of CO2 by NaBH4 is described, along with full spectroscopic and crystallographic characterization of the resulting triformatoborohydride, Na[HB(OCHO)3]. In order to develop catalytic transformations for CO2 utilization, we undertook an extensive investigation into the synthesis of novel phosphine ligand architectures that could support transition metal catalysts. A new, chelating, cationic P,N-ligand, [pyP2dmb2][SbF6], was synthesized by treatment of the robust bicyclic diphosphane, 3,4,8,9-tetramethyl-1,6-diphosphabicyclo(4.4.0)deca-3,8-diene or P2dmb2, with 2-iodopyridine, followed by an anion exchange. This phosphino-phosphonium salt was investigated as a ligand for group 6 and group 10 transition metals. Other cationic and zwitterionic ligand frameworks were also briefly investigated. A family of cis-macrocyclic diphosphines was prepared in just three steps from white phosphorus and commercial materials using a modular synthetic approach. Alkylation of bicyclic diphosphane P2dmb2 produced phosphino-phosphonium salts [RP2dmb2]X, where R is methyl, benzyl, isobutyl, or neopentyl. Treatment of these salts with organometallic reagents yielded macrocyclic diphosphines of the form cis-1-R-6-R′-3,4,8,9-tetramethyl-2,5,7,10-tetrahydro-1,6-DiPhospheCine, or R,R′–DPC, in which R′ is methyl, cyclohexyl, phenyl, mesityl or neopentyl. Alternatively, symmetric diphosphine Cy2–DPC was synthesized from the dichlorodiphosphine Cl2P2dmb2. Multidentate ligands with additional S, P and N donor atoms have also been prepared. The coordination chemistry of these cis-macrocyclic diphosphines was explored, with a focus on nickel and cobalt complexes. An unusual iodide-bridged cobalt(I) dimer, [(Cy2–DPC)CoI]2, was prepared and structurally characterized. These nickel and cobalt complexes supported by cismacrocyclic diphosphines were investigated as potential catalysts for the coupling of carbon dioxide and ethylene to produce acrylate, a valuable polymer precursor. The nickel complexes studied showed similar or better turnover numbers for acrylate production compared to complexes of commercial diphosphine ligands. Although not yet catalytic, the first examples of cobalt complexes capable of mediating acrylate formation from CO2 and ethylene are reported.
I, The Decomposition Kinetics of Nickelacyclopentanes. II, The in Situ Decomposition of Nickelacyclobutanes. III, Studies Toward the Homogeneous Catalytic Reduction of Carbon Monoxide
Author: Richard Kingsley StuartPublisher:
ISBN:
Category : Carbon monoxide
Languages : en
Pages : 280
Book Description
Modern Organonickel Chemistry
Author: Yoshinao TamaruPublisher: John Wiley & Sons
ISBN: 3527604235
Category : Science
Languages : en
Pages : 346
Book Description
Organonickel chemistry plays an increasingly important role in organic chemistry, and interest in this topic is now just as keen as in organopalladium chemistry. While there are numerous, very successful books on the latter, a book specializing in organonickel chemistry is long overdue. Edited by one of the leading experts in the field, this volume covers the many discoveries made over the past 30 years, and previously scattered throughout the literature. Active researchers working at the forefront of organonickel chemistry provide a comprehensive review of the topic, including cross-coupling reactions, asymmetric synthesis and heterogeneous catalysis reaction types. A must-have for both organometallic chemists and synthetic organic chemists.
Ethylene Polymerization in Supercritical Carbon Dioxide with Binuclear Nickel(II) Catalysts
Author: Damien GuironnetIndex to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 712
Book Description
Aliphatic Compounds
Author: M. F. AnsellPublisher: Elsevier
ISBN: 008088072X
Category : Technology & Engineering
Languages : en
Pages : 285
Book Description
Aliphatic Compounds
Olefin Polymerization
Author: Walter KaminskyPublisher: Wiley-VCH
ISBN: 9783527317424
Category : Technology & Engineering
Languages : en
Pages : 0
Book Description
With an enormous velocity, olefin polymerization has expanded to one of the most significant fields in polymers since the first industrial use about 50 years ago. In 2005, 100 million tons of polyolefins were produced - the biggest part was catalyzed by metallorganic compounds. The Hamburg Macromolecular Symposium 2005 with the title "Olefin Polymerization" involved topics such as new catalysts and cocatalysts, kinetics, mechanism and polymer reaction engineering, synthesis of special polymers, and characterization of polyolefins. The conference combined scientists from different disciplines to discuss latest research results of polymers and to offer each other the possibility of cooperation. This is reflected in this volume, which contains invited lectures and selected posters presented at the symposium.
Catalytic Ethylene Polymerisation in Carbon Dioxide as a Reaction Medium with Soluble Nickel(II) Catalysts
Author: Amaia BasteroDissertation Abstracts International
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 980
Book Description