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Synthesis And Nmr Properties Of Dihydrogen Hydride Complexes Of Rhodium And Iridium
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Book Synopsis Synthesis and NMR Properties of Dihydrogen-hydride Complexes of Rhodium and Iridium by : Warren James Oldham
Download or read book Synthesis and NMR Properties of Dihydrogen-hydride Complexes of Rhodium and Iridium written by Warren James Oldham and published by . This book was released on 1996 with total page 246 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 and Properties of Two Fold Symmetric Ruthenium and Rhodium Dihydrogen-hydride Complexes by : Heather Mellows
Download or read book Synthesis and Properties of Two Fold Symmetric Ruthenium and Rhodium Dihydrogen-hydride Complexes written by Heather Mellows and published by . This book was released on 2000 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Synthesis, Characterization, and Reactivity of Heterobimetallic Gold Hydride Cluster Complexes of Ruthenium, Osmium, Rhodium, and Iridium by : Bruce Dean Alexander
Download or read book The Synthesis, Characterization, and Reactivity of Heterobimetallic Gold Hydride Cluster Complexes of Ruthenium, Osmium, Rhodium, and Iridium written by Bruce Dean Alexander and published by . This book was released on 1988 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis, Characterization and Reactivity of Transition-metal Dihydrogen Complexes of Fe, Ru, and W by : Lori Ruth Ann Stepan Van der Sluys
Download or read book Synthesis, Characterization and Reactivity of Transition-metal Dihydrogen Complexes of Fe, Ru, and W written by Lori Ruth Ann Stepan Van der Sluys and published by . This book was released on 1991 with total page 714 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dihydrogen and Hydride Complexes of Ruthenium(II): Synthesis and Properties by : Caroline Theresia Schweitzer
Download or read book Dihydrogen and Hydride Complexes of Ruthenium(II): Synthesis and Properties written by Caroline Theresia Schweitzer and published by . This book was released on 1993 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2005 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hydrodesulfurization Modeling with Iridium, Rhodium, and Nickel Hydrides by : Matthew Robert Grochowski
Download or read book Hydrodesulfurization Modeling with Iridium, Rhodium, and Nickel Hydrides written by Matthew Robert Grochowski and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Reaction of [... characters removed] with 2-methylthiophene and 2,5-dimethylthiophene at 120°C in the presence of H2 results in the cleavage of the thiophene carbon-sulfur bond(s). In both cases the thiophenes are ring opened and hydrogenated resulting in dinuclear Ir complexes with bridging thiolates. The primary product in the reaction involving 2.5-dimethylthiophene is [... characters removed]. This product has been characterized and is present in diastereomeric pairs. Reaction with 2-methylthiophene produces a complex mixture consisting of five products. The product distribution consists of mono and di-substituted bridging thiolate products three of which have been structurally characterized by single-crystal X-ray diffraction. Independent synthesis of each of these products has been performed, and characterization of the reaction mixture has been accomplished by 1H and 13C NMR spectroscopies, as well as by ESI-MS and elemental analysis. Reaction with 2-acetylthiophene showed very similar reactivity; an X-ray structure confirmed the nature of the diastereomeric pairs present. The processes of C-C and C-S bond cleavage of 2-cyanothiophene have been studied with the homogeneous organometallic compound [Ni(dippe)H]2. Reaction at room temperature resulted in cleavage of the nitrile substituted C-S bond to give the Ni-metallacycle complex (dippe)Ni(K2-S, C-SCH=CHCH=C(CN)), which has been fully characterized by NMR spectroscopy and X-ray diffraction. Conversion to the C-CN cleavage product (dippe)Ni(CN)(2-thiophenyl) occurred when the solution was heated to 85°C. On closer inspection four other intermediates were observed by 31P NMR spectroscopy at -60°C. Structures for the intermediates were elucidated through a combination of independent synthesis, theoretical calculations, chemical characterization, and experimental precedent. A kinetic product (dippe)Ni(K2-S, C-SC(CN)=CHCH=CH) was formed from cleavage of the non-substituted C-S bond, as well as a [... characters removed], and a dinuclear mixed Ni(0)-Ni(II) product. The unusual lithium coordinated complex [... characters removed] was synthesized and characterized by NMR spectroscopy and X-ray crystallography. The [... characters removed] and LiBEt3H moieties are bound together through lithium. Bonding interactions occur between the lithium and the metal hydrides, as well as the lithium and the B-H bond of BEt3H. Formation of the complex is highly solvent dependent and may be part of a general bonding phenomenon between borohydrides and metal hydride complexes. The rhodium dimer [... characters removed] reacted with 4-methyldibenzothiophene to form the C-S cleavage product [... characters removed], which has been fully characterized by NMR spectroscopy (1H, 31P, and 13C), elemental analysis, APCI-MS, and X-ray diffraction. The crystal structure shows that hydrogenolysis of the C-S bond occurs exclusively from the unhindered side of 4-MeDBT. [... characters removed] also reacts in an analogous manner with 4,6-dimethyldibenzothiophene to form [... characters removed] which required more vigorous reaction conditions than those found for the 4-MeDBT, has been characterized by NMR spectroscopy (1H, 31P, and 13C), APCI-MS, and X-ray diffraction. The x-ray structure is the first known x-ray structure obtained of a C-S activated 4,6-Me2DBT metal complex showing complete C-S bond cleavage. The complex [(dippe)Rh(Mu-Cl)]2 was reduced with potassium metal to produce the highly reactive Rh( -1) species K[(dippe)Rh(THF)2], which was characterized by NMR spectroscopy (31P, 1H) and IR spectroscopy after forming the derivative K[(dippe)Rh(CO)2]. The derivative displayed fluxional behavior by the dippe ligand, as observed by 31P NMR spectroscopy, an unusual occurrence for this type of complex. The C-CN bond of benzonitrile was cleaved by oxidative addition when it was reacted stoichometrically with K[(dippe)Rh(CO)2], to form the anionic Rh(I) complex K[(dippe)Rh(CN)(Ph)]. This complex has been characterized by NMR spectroscopy (31P, 1H, 13C), and the use of 13CN labeled benzonitrile was instrumental in the characterization."--Leaves v-vii
Book Synopsis Dihydrogen and Hydride Complexes of Osmium(ii) : Synthesis by : PATRICIA ANNE. MALTBY
Download or read book Dihydrogen and Hydride Complexes of Osmium(ii) : Synthesis written by PATRICIA ANNE. MALTBY and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Synthesis and Chemistry of Organoiridium Complexes by : Thomas Foo
Download or read book The Synthesis and Chemistry of Organoiridium Complexes written by Thomas Foo and published by . This book was released on 1989 with total page 346 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 American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1996 with total page 872 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Reactions of Cyclooctadiene and Phosphine Complexes of Rhodium by : Robert Thomas Price
Download or read book Synthesis and Reactions of Cyclooctadiene and Phosphine Complexes of Rhodium written by Robert Thomas Price and published by . This book was released on 1986 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Pincer Compounds by : David Morales-Morales
Download or read book Pincer Compounds written by David Morales-Morales and published by Elsevier. This book was released on 2018-04-11 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pincer Compounds: Chemistry and Applications offers valuable state-of-the-art coverage highlighting highly active areas of research—from mechanistic work to synthesis and characterization. The book focuses on small molecule activation chemistry (particularly H2 and hydrogenation), earth abundant metals (such as Fe), actinides, carbene-pincers, chiral catalysis, and alternative solvent usage. The book covers the current state of the field, featuring chapters from renowned contributors, covering four continents and ranging from still-active pioneers to new names emerging as creative strong contributors to this fascinating and promising area. Over a decade since the publication of Morales-Morales and Jensen’s The Chemistry of Pincer Compounds (Elsevier 2007), research in this unique area has flourished, finding a plethora of applications in almost every single branch of chemistry—from their traditional application as very robust and active catalysts all the way to potential biological and pharmaceutical applications. Describes the chemistry and applications of this important class of organometallic and coordination compounds Includes contributions from global leaders in the field, featuring pioneers in the area as well as emerging experts conducting exciting research on pincer complexes Highlights areas of promising and active research, including small molecule activation, earth abundant metals, and actinide chemistry
Book Synopsis The Synthesis, Characterization and Catalytic Properties of Ruthenium and Rhodium Phosphine Complexes by : Michael Francis McGuiggan
Download or read book The Synthesis, Characterization and Catalytic Properties of Ruthenium and Rhodium Phosphine Complexes written by Michael Francis McGuiggan and published by . This book was released on 1983 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tris(guanidinato) Complexes of Iridium and Rhodium in the Oxidation States +III and +IV by : Wei-Tsung Lee
Download or read book Tris(guanidinato) Complexes of Iridium and Rhodium in the Oxidation States +III and +IV written by Wei-Tsung Lee and published by . This book was released on 2011 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical oxidation by [FeCp2]PF6 afforded thermally unstable, paramagnetic Rh IV compounds, [Rh{ArNC(NR 2)NAr} 3]PF6, which were characterized by mass spectrometry and electronic absorption spectroscopy. Furthermore, two FeII complexes of tetradentate tripodal ligands, [Fe(L1)(OTf) 2] and [Fe(L2)(OTf) 2]; where L1 = N, N-bis(2-benzimidazolylmethyl)-N-(2-pyridylmethyl) amine and L2 = N, N-bis[(1-methylbenzimidazol-2-yl)methyl]-N-[(pyridin-2-yl)methyl] amine; were synthesized and characterized. The 1 H NMR spectra for [Fe(L1)(NCMe) 2](OTf) 2 and [Fe(L2)(NCMe) 2](OTf) 2 in CD3 CN solution at ambient temperature exhibit paramagnetically shifted peaks typical of high-spin FeII complexes, while variable-temperature 1 H NMR spectroscopy showed that the Fe center in [Fe(L1)(NCMe) 2](OTf) 2 is in a spin equilibrium and that in [Fe(L2)(NCMe) 2](OTf) 2 in the high-spin state (at 25° C). Highly reactive oxoiron(IV) complexes were obtained by reaction of the FeII complexes with an excess of m-CPBA at -40° C.
Book Synopsis NMR in Organometallic Chemistry by : Paul S. Pregosin
Download or read book NMR in Organometallic Chemistry written by Paul S. Pregosin and published by John Wiley & Sons. This book was released on 2013-07-26 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first and ultimate guide for anyone working in transition organometallic chemistry and related fields, providing the background and practical guidance on how to efficiently work with routine research problems in NMR. The book adopts a problem-solving approach with many examples taken from recent literature to show readers how to interpret the data. Perfect for PhD students, postdocs and other newcomers in organometallic and inorganic chemistry, as well as for organic chemists involved in transition metal catalysis.
