Download or read book Synthesis and Evaluation of Ferrocenylpyrazolyl and Ferrocenylpyrazolyl phosphine Palladium and Nickel Complexes as Ethylene Oligomerization Catalysts written by Arnoux Van der Westhuizen and published by . This book was released on 2011 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ferrocenylpyrazolyl Nickel II and Palladium II Complexes as Pre catalysts for Ethylene and Higher alpha olefins Reactions written by Collins Obuah and published by . This book was released on 2014 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis of New Iron and Nickel Complexes written by Anthony Kermagoret and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: My Ph-D thesis concerns the study of the catalytic oligomerization reaction with nickel, iron and cobalt complexes coordinated by N-O, P-N, N-P-N, P-O and P-N-P type ligands with a N donor atom represented by an oxazoline or a pyridine heterocycle. These complexes activated by a cocatalyst such as MAO or AlEtCl2 showed high activities and a high selectivity of C4 olefins in ethylene oligomerization. The nickel complexes with P-N chelates showed a high impact of the P substituents on the oligomerization selectivities. Moreover, the crystallographic studies on nickel complexes coordinated by N-O and P-N type ligands showed the formation of mono-, di- and tetranuclear complexes. The cobalt, iron and palladium complexes with N-P-N ligands highlighted original N-N, P-N or N-P-N coordination modes of the ligands influenced by the ligand substituents and the metal center.
Download or read book Pyrazolyl Nickel and Palladium Complexes as Catalysts for Ethylene Oligomerization and Olefins and Carbon Monoxide Co polymerization Reactions written by Collins Obuah and published by . This book was released on 2011 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Characterization of Nickel Palladium and Chromium Complexes as Olefin Oligomerization Catalysts written by Moses Mokgolela Mogorosi and published by . This book was released on 2009 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Evaluation of Pd II and Ni II Complexes as Catalyst for Ethylene Polymerization written by Zanele Felicia Dube and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bis pyrazolyl Chromium III Nickel II and Palladium II Complexes as Ethylene Oligomerization and Polymerization Catalysts written by Nangamso Alicia Miti and published by . This book was released on 2008 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Divalent Iron Cobalt Nickel and Palladium Complexes of 1H pyrazol 1 yl imine and 1H pyrazol 1 yl ethanol Ligands written by Michael Kojo Ainooson and published by . This book was released on 2010 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis Characterization and Catalytic Testing of Palladium and Nickel Based Intermetallic Compounds for Acetylene Semi hydrogenation written by Anish Dasgupta and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Intermetallic compounds often offer opportunities for synthesis of site isolated catalysts having precise active site coordination and morphology. They are also resistant to segregation effects (compared to random alloys) because of the high heat of formation of their unique electronically stabilized crystal structures. Due to predictable, periodic and easily reproducible nature of the isolated active sites, suitably chosen intermetallic compounds can act as excellent model systems for studying catalytic structure function correlation in different small molecule chemistries. In the current dissertation I utilized H2-D2 exchange in addition to ethylene and acetylene hydrogenation as the probe reactions of choice. My ultimate target is to understand and quantify the effect of active site (transition metal) isolation during the semi-hydrogenation of acetylene in an ethylene rich stream, which is a key step in industrial polyethylene synthesisa multi-hundred-billion-dollar industry. I studied two different classes of catalysts for this chemistry: Pd-(M)-Zn (M=Cu, Ag, Au) -brass intermetallics and Ni-Ga intermetallics. I used micron scale bulk materials as model catalysts because they provide greater compositional control and allows for studying the intrinsic catalytic property of the intermetallic, free from support and ligand effects.A significant part of the text is dedicated to the synthesis, characterization and catalytic study of the bulk Pd-(M)-Zn ternary -brass phase materials because of its unique adaptability in terms of developing a family of closely related model catalysts having Pd-M-Pd active sites (M=Pd, Zn, Au, Cu and Ag) which can change the semi-hydrogenation activity and selectivity by two orders of magnitude even when only one atom is changed per 52 atom unit cell. As an extension of this project I also report several Pd-Ni-Zn and Pd-Pt-Zn ternary -brass phases and determine their atomic site occupancy factors.During the course of my research I realized there were no reported methods for synthesizing Pd-Zn and Ni-Zn -brass intermetallics as catalytically relevant supported nano-particles (NPs). I developed and optimized a hybrid generalized synthesis approach for SiO2 supported Pd-Zn, Ni-Zn and Cu-Zn -brass NPs. I also provide preliminary evidence that this approach can be easily extended to the synthesis of ternary NPs as well.In the case of Ni-Ga intermetallics, I tried to understand the role of Ga in controlling acetylene semi-hydrogenation. I observed a reversal in the ethylene selectivity trend with Ga content between 85 C and 160 C which is unexpected based on published DFT calculations. Previously, it has been suggested that Ga simply acts as a spacer for isolating Ni/Pd active sites much like Zn in the case of Ni-Zn catalysts (studied by Charles Spanjers from our research group). However, Ga has a higher affinity to hydrogen compared to Zn and I attempted to investigate if Ga may have a weak but non-negligible catalytic contribution towards hydrogenation which has typically not been previously considered in any detail in the case of acetylene semi-hydrogenation on metallic catalysts. Additionally, I provide understanding behind the high acetylene semi-hydrogenation selectivity of Ni5Zn21 catalyst which was originally reported by Spanjers et al. (J. Catal. 2014). This involved identifying the site occupation factor of Ni and Zn in the -brass lattice for materials having greater than 15.4 at% Ni. It is determined that (unlike Pd-Zn -brass) exactly single atom Ni1 active sites are exposed on the surface irrespective of the Ni concentration (even though Ni3 clusters are present in the bulk) which explains the suppression of over-hydrogenation and oligomerization on this catalyst, resulting in the high ethylene selectivity reported by Spanjers et al.
Download or read book Synthesis and Characterization of pyrazolylphosphinite Nickel II and Palladium II Complexes and Their Catalytic Activity Towards Olefin Oligomerization written by Juliana Mana Edor and published by . This book was released on 2016 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Reactivity of Nickel Palladium and Platinum Phosphine Complexes with Hydridoamido Hydridophenoxo and Dithiooxalato Ligands written by Robert L. Cowan and published by . This book was released on 1989 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Synthesis Characterisation and Catalytic Properties of Nickel Palladium and Platinum Complexes with Tris hydroxymethyl phosphine and Tris cyanoethyl phosphine written by Martin Barry Smith and published by . This book was released on 1991 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis of New Transition Metal Complexes and Applications for the Catalytic Ethylene Oligomerization and or Polymerization written by Suyun Jie and published by . This book was released on 2008 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyolefins represent about half the market of the synthesized polymeric materials. The catalytic oligomerization of ethylene is currently the primary source of linear [alpha]-olefins which are extensively used for the preparation of synthetic lubricants, detergent intermediates, surfactants, plasticizers and as comonomers to synthesize linear low-density polyethylene (LLDPE). This work deals with the synthesis of 2-imino-1,10-phenanthroline and 2-imino-9-phenyl-1,10-phenanthroline tridentate ligand and of their iron, cobalt and nickel complexes of which some are very active in the catalytic ethylene oligomerization. Stereoelectronic parameters influencing the catalytic properties have been examined in detail. Furthermore, mono- and dinuclear cobalt complexes with phosphino- and phosphinito-oxazoline ligands have been prepared in the course of this thesis. They have shown moderate catalytic activity in the presence of MAO or AlEtCl2 as cocatalyst.
Download or read book Synthesis and Catalytic Evaluation of Chiral Ferrocenyl P P and P N Palladium II Complexes written by Siphamandla Cecil Masikane and published by . This book was released on 2013 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pyrazole and Pyrazolylethylamine Nickel II and Palladium II Complexes as Catalysts for Olefin Oligomerization and Friedel Crafts Alkylation Reactions written by Lerato Petunia Moeti and published by . This book was released on 2014 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Synthesis and Characterization of Nickel Platinum and Palladium Triphenyl phosphine and DPPE maleonitriledithiolate Complexes for Use as Intermediates in the Synthesis of the C60 Maleonitriledithiolate Target Molecule written by Francesca L. Filler and published by . This book was released on 1996 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Characterization of New Pyrazolyl and Ferrocenyl pyrazolyl Ru II and Ru 0 Complexes as Catalyst Presursors for the Hydroformylation of 1 Octene written by Kagiso M.J. Sekati and published by . This book was released on 2018 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
