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Synthesis And Characterization Of Rhodium And Iridium Complexes With The Bisdimethylsilylcyclopentadienyl Ligand
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Book Synopsis Synthesis and Characterization of Rhodium and Iridium Complexes with the Bis(dimethylsilylcyclopentadienyl) Ligand by : Gordon J. Hunter
Download or read book Synthesis and Characterization of Rhodium and Iridium Complexes with the Bis(dimethylsilylcyclopentadienyl) Ligand written by Gordon J. Hunter and published by . This book was released on 2005 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterization of Some Rhodium and Iridium Alkyl Complexes by : Matthew Albert Kulzick
Download or read book Synthesis and Characterization of Some Rhodium and Iridium Alkyl Complexes written by Matthew Albert Kulzick and published by . This book was released on 1984 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis, Characterization and Catalytic Performance of Rhodium and Iridium Complexes Supported in Dealuminated HY Zeolite by : Claudia Martinez Macias
Download or read book Synthesis, Characterization and Catalytic Performance of Rhodium and Iridium Complexes Supported in Dealuminated HY Zeolite written by Claudia Martinez Macias and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Essentially molecular supported catalysts were synthesized by using organometallic complexes as precursors, such as Rh(CO)2(acac), Rh(C2H4)2(acac), Ir(CO)2(acac), and Ir(C2H4)2(acac) (where acac is acetylacetonate) and HY zeolite as a support. A goal was to obtain highly uniform solid catalysts with well-defined structures. Characterization by X-ray absorption (XAS) and infrared (IR) spectroscopies confirmed the anchoring of the metal to the support with a high degree of uniformity. IR and 29Si and 27Al nuclear magnetic resonance (NMR) spectra characterize the presence of amorphous regions in the zeolite, and scanning transmission electron microscopy (STEM) identifies these amorphous regions, where iridium is more susceptible to aggregation than in the crystalline regions. Treatment of Ir(CO)2/HY zeolite with C2H4 and H2 at room temperature led to a family of species which includes Ir(CO)2, Ir(CO)(C2H4), Ir(CO)(C2H4)2, Ir(CO)(C2H5) and, tentatively, Ir(CO)(H). The identification of the species is based on XAS and IR spectra (including spectra of samples made with isotopically labeled ligands, 13CO and D2O) and density functional theory (DFT) calculations. The catalytic performance of isostructural rhodium and iridium species incorporating CO as a ligand was measured for the ethylene conversion; the CO not only acts as an inhibitor but it also as a probe molecule providing information about the electronic properties of the metal and of the species present during reaction. When isostructural rhodium and iridium diethylene species are bonded near each other on HY zeolite, the iridium complexes alter the selectivity of rhodium by spilling over hydrogen that hinders the interaction between ethylene and the acidic sites of the zeolite that act in concert with the rhodium, causing it to favor ethylene hydrogenation over dimerization. All these results show how structurally simple solid catalysts can be used to facilitate fundamental understanding of catalysts and their performance.
Book Synopsis Development of Novel Rhodium and Iridium Complexes with a Fac-chelating Ligand for Electrophilic C-H Activation by : Jennifer Lee Rhinehart
Download or read book Development of Novel Rhodium and Iridium Complexes with a Fac-chelating Ligand for Electrophilic C-H Activation written by Jennifer Lee Rhinehart and published by . This book was released on 2011 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Several new bis-3,5(dimethylpyrazol-1-yl)acetate rhodium and iridium complexes were synthesized from MCl3?H2O. [Rh(bdmpza)Cl3]- was isolated with three different cations, lithium, sodium and tetraethylamonium, to obtain a full characterization profile. Analogously, [Ir(bdmpza)Cl3]- was isolated with two different cations, lithium and sodium, and characterized by 1H NMR, 13C NMR, elemental analysis and X-ray crystal structure determination. A neutral rhodium complex, [Rh(bdmpza)Cl2(py)], was also isolated as two isomers by addition of pyridine. Reaction of [Rh(bdmpza)Cl3]- and [Rh(bdmpza)Cl2(py)] with dimethylzinc afforded three new complexes, [Rh(bdmpza)Cl2(Me)]-, [Rh(bdmpza)Cl(Me)2]- and [Rh(bdmpza)Cl(Me)(py)]. Stoichiometric and catalytic C-H activation of benzene was investigated for these new rhodium methyl complexes. Novel rhodium and iridium precatalysts catalysts, [Rh(bdmpza)Cl3]- Na+, [Ir(bdmpza)Cl3]- Na+ and [Rh(bdmpza)Cl2(py)], were subjected to H/D exchange conditions with benzene and deuterated trifluoroacetic acid, acetic acid and methanol in the presence of a halide abstractor. Optimum conditions of silver triflate, deuterated trifuoroacetic acid, 100°C and 24 hours were identified to conduct arene H/D exchange studies. Most arenes investigated showed modest H/D exchange in the ring, while branched [beta]-sp3C-H bonds also showed affinity for H/D exchange. Mechanistic studies of [beta]-sp3C-H H/D exchange were carried out, including synthesis of [Rh(bdmpz)Cl3(py)], which does not contain the pendant acetate group"--Leaf vi.
Book Synopsis Rhodium and Iridium Complexes Supported by Chelating Bis-N-heterocyclic Carbene Ligands by : Roxy Joanne Lowry
Download or read book Rhodium and Iridium Complexes Supported by Chelating Bis-N-heterocyclic Carbene Ligands written by Roxy Joanne Lowry and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Eighty-five percent of all industrial chemical processes occur catalytically. The world's expanding appetite for mass production of exotic chemicals necessitates the design and application of enhanced catalysts. To optimize catalytic materials, the detailed relationships between catalyst architecture and reactivity must be determined. Although for many ligand families these relationships are well understood, novel catalysts require in depth empirical investigation to determine these connections. The design of a novel di-N-heterocyclic carbene family of ligands in reported herein. These C2 symmetric ligands are based on the rigid 9,10-dihydro-9,10-ethanoanthracene backbone and designed for utilization in chiral catalysis. Thorough investigation into the relationships between the ligand's structure and the architecture of the resulting rhodium and iridium catalysts directed the design of three generations of our novel ligand family. The first generation, trans-1,1'-[9,10-dihydro-9,10-ethanoanthracene-11,12- diyldimethanediyl]bis(benzylimidazole) bis(triflouromethansulfonate) [DEAM-BI](OTf)2 (2-1), is too flexible to enforce a rigid chiral pocket about a metal center under catalytic conditions. The constrained second generation ligands, trans-1,1'-(9,10-dihydro-9,10-ethanoanthracene.
Book Synopsis Synthesis and Reactivity of Rhodium and Iridium Silyl and Silylene Complexes Supported by PNP Pincer Ligands by : Elisa E. Calimano
Download or read book Synthesis and Reactivity of Rhodium and Iridium Silyl and Silylene Complexes Supported by PNP Pincer Ligands written by Elisa E. Calimano and published by . This book was released on 2009 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Iridium Complexes with Cp* Ligand by : Bi Jiang
Download or read book Iridium Complexes with Cp* Ligand written by Bi Jiang and published by . This book was released on 2010 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Organometallic Chemistry of Rhodium and Iridium Complexes of Macrocyclic PCP and POCOP Pincer Ligands by : Baptiste Leforestier
Download or read book Synthesis and Organometallic Chemistry of Rhodium and Iridium Complexes of Macrocyclic PCP and POCOP Pincer Ligands written by Baptiste Leforestier and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterization of New Iridium Complexes Based on a Chiral Bis-sulfoxide Ligand by : Mirella Bigi
Download or read book Synthesis and Characterization of New Iridium Complexes Based on a Chiral Bis-sulfoxide Ligand written by Mirella Bigi and published by . This book was released on 2010 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis, Characterization and Reactivity of Rhodium- and Iridium-iminophosphorane Complexes by : Pieter Imhof
Download or read book Synthesis, Characterization and Reactivity of Rhodium- and Iridium-iminophosphorane Complexes written by Pieter Imhof and published by . This book was released on 1990 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterization of Rhodium, Iridium and Silver Chalcogenometalates and the Influence of Encapsulating Agents on Their Formation by : Thomas Edward Albrecht-Schmitt
Download or read book Synthesis and Characterization of Rhodium, Iridium and Silver Chalcogenometalates and the Influence of Encapsulating Agents on Their Formation written by Thomas Edward Albrecht-Schmitt and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The (Pt(Se$\sb4)\sb3\rbrack\sp{2-}$, (Rh(Se$\sb4)\sb3\rbrack\sp{3-}$, and (Ir(Se$\sb4)\sb3\rbrack\sp{3-}$ anions undergo conformational transformations as a function of temperature, as observed by $\sp{77}$Se NMR spectroscopy. The thermodynamics of these transformations are: (Pt(Se$\sb4)\sb3\rbrack\sp{2-}$, $\Delta$H = 1.7(3) kcal mol$\sp{-1}$, $\Delta$S = 11.5(1.3) e.u.; (Rh(Se$\sb4)\sb3\rbrack\sp{3-}$, $\Delta$H = 5.2(7) kcal mol$\sp{-1}$, $\Delta$S = 24.7(3.0) e.u.; (Ir(Se$\sb4)\sb3\rbrack\sp{3-}$, $\Delta$H = 2.5(5) kcal mol$\sp{-1}$, $\Delta$S = 11.5(2.2) e.u.
Book Synopsis Water-soluble Iridium and Rhodium Complexes by : Julia Knapp
Download or read book Water-soluble Iridium and Rhodium Complexes written by Julia Knapp and published by . This book was released on 2018 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Organometallic Chemistry of Rhodium and Iridium Complexes of Macrocyclic PNP and PONOP Pincer Ligands by : Thomas M. Hood
Download or read book Synthesis and Organometallic Chemistry of Rhodium and Iridium Complexes of Macrocyclic PNP and PONOP Pincer Ligands written by Thomas M. Hood and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis, Characterization, and Reactivity Studies of Iridium Complexes Bearing the Ligand Diphenylphosphidoboratabenzene by : Luis Alfredo Arizpe
Download or read book Synthesis, Characterization, and Reactivity Studies of Iridium Complexes Bearing the Ligand Diphenylphosphidoboratabenzene written by Luis Alfredo Arizpe and published by . This book was released on 2011 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: The synthesis, structure, and reactivity properties of three iridium square planar complexes bearing the anionic phosphine ligand diphenylphosphidoboratabenzene (DPB) are described. Reactivity studies show a rate enhancement for the oxidative addition of a substituted benzyl bromide and Me3SnBr with DPB as a ligand in place of triphenylphosphine. Two products from the oxidative addition of p-chlorobenzyl bromide have been isolated and structurally characterized.
Book Synopsis Synthesis and Reactivity of Rhodium and Iridium Complexes Supported by New Silyl Pincer Ligands by : MacLean Darren F.
Download or read book Synthesis and Reactivity of Rhodium and Iridium Complexes Supported by New Silyl Pincer Ligands written by MacLean Darren F. and published by . This book was released on 2008 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Reactions of Complexes of Rhodium and Iridium Having Chelating N,O-donor Ligands by : Namadzavho Enos Sitabule
Download or read book Synthesis and Reactions of Complexes of Rhodium and Iridium Having Chelating N,O-donor Ligands written by Namadzavho Enos Sitabule and published by . This book was released on 2000 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Synthesis and Characterization of Several Bridged, Dinuclear Complexes of Rhodium and Iridium by : Michael Hill
Download or read book The Synthesis and Characterization of Several Bridged, Dinuclear Complexes of Rhodium and Iridium written by Michael Hill and published by . This book was released on 1987 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
