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Showing 1 to 20 of 277 for “"rhodium"”.
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A structural study of rhodium carbonyl chloride and rhodium carbonyl bromide
Thesis: B.S., Massachusetts Institute of Technology, Department of Chemistry, 1960
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Cerium and rhodium substitution in the antiferromagnetic superconductor cerium rhodium indium(5)
Among heavy fermion materials, a relationship between unconventional superconductivity and magnetism has been observed. The dependence of the magnetic transitions of CexLa1-xRhyIr1-y In5 with respect to temperature and magnetic field applied along the tetragonal c and a crystal axes is examined …
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Rhodium-zeolite hydroformylation of propylene
… purpose of this research was to characterize the rhodium exchanged NaX and NaY zeolites as propylene hydroformylation catalysts. Catalytic activity was measured in a differential bed reactor. Flow in situ infrared spectroscopy was used to probe the coordination chemistry of the zeolite modified …
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Mechanistic Studies of Rhodium Oxidation Catalysts
… the coordination of O(,2) and olefin to a rhodium(I) catalyst. One particularly promising system is the Rh/Cu co-catalyzed O(,2) oxidation of terminal olefins to almost exclusively 2-hexanone. The relatively short lifetimes of the homogeneous catalysts for this olefin oxidation encouraged …
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Rhodium-catalyzed Asymmetric Carbon-Carbon Bond Formation Leading to the Development of Rhodium/Palladium Multi-metal Catalysis
This thesis describes the development of rhodium-catalyzed asymmetric ring opening of strained alkenes and the subsequent use of rhodium and palladium catalysis in the development of domino reactions. The contents are divided into 4 chapters. Chapter 1 describes the rhodium-catalyzed asymmetric …
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Phase equilibria studies of Cr3O-type structures in the vanadium- rhodium-silicon and niobium-rhodium-silicon ternary systems
… studies of two ternary systems, the vanadium rhodium-silicon system and the niobium-rhodium-silicon system, were made to obtain information about the formation of the Cr₃O-type structure in these systems. All samples had compositions in the . vicinity of the stoichiometric Cr₃O composition …
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A computational study of supported rhodium catalysts
… structures of heterogeneous catalysts based on rhodium supported on a metal oxide (-Al2O3). Two different methodologies were used. The first methodology uses a periodic model and a plane-wave basis set to solve the Schrödinger equation in the framework of Bloch’s theorem. The optimised …
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Chirale Rhodium-Bisphosphan-Komplexe - Kraftfeldparameteroptimierung und Konformationsanalyse
… wurde das konformative Verhalten von chiralen Rhodium-Bisphosphan-Komplexen des Typs HOCH(CH2PR2)(CH2PR'2)Rh(I)C8H12 mit molekularmechanischen Methoden untersucht. Dazu wurde ein Kraftfeld für diese reaktiven Präkatalysatoren mit einem Gentischen Algorithmus auf der Basis von elf …
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Dynamics of Dissociative Chemisorption: Methane on Rhodium
Made available in DSpace on 2015-05-12T22:39:08Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7414622.PDF: 3825886 bytes, checksum: 62a9bffc95481c8f6efa7d404c1b80db (MD5) Previous issue date: 1974
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Dynamics of dissociative chemisorption methane on rhodium
Submitted by William Weathers (weathrs2@illinois.edu) on 2012-03-02T20:50:36Z No. of bitstreams: 1 1974_stewart.pdf: 4380764 bytes, checksum: ba7257711c1d291833a78e7c40620838 (MD5)
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Rhodium zeolites as catalysts for hydrodesulfurization reactions
… on an alumina support. This study investigated rhodium incorporated zeolites as catalysts for thiophene hydrodesulfurization reactions. The compounds RhCl₃ • 3H₂O, Rh₂(CO₂CH₃)₄, and Rh(PPh₃)₃Cl were adsorbed onto 13X and ZSM5 zeolites. Results of thiophene hydrodesulfurization over RhCl₃-13X and …
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Liquid phase hydroformylation by zeolite supported rhodium
… compare the behavior of zeolites containing rhodium with that of homogeneous rhodium species as catalysts for liquid phase hydroformylation of 1-hexene in order to study the effects of zeolite immobilization. NaX zeolite was cation exchanged with several rhodium salts and used as …
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Low-nuclearity titanium alkoxides and their rhodium derivatives
The reaction of Ti(OPri)4 with 0.078 equiv. of 10 atom% 17O enriched water and 0.6 equiv. of MeOH in i-PrOH solution gave [Ti3O](OPr i)9(OMe) (1). A single crystal X-ray diffraction study of this material indicated that 1 contains two crystallographically-independent Ti3(mu3-O)(mu3-OMe)(mu2-OPr …
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Exploration of the mechanism of rhodium(III) co-precipitation with copper sulfide (at low rhodium concentrations) incorporating the cationic substitution reaction path
This study is a preliminary investigation into the mechanism and kinetics of Rh3+ coprecipitation with CuS upon aqueous thiosulphate addition to acidic base metal sulphate solutions, where Rh3+ concentration is two orders of magnitude lower than Cu2+, over 50 - 150 °C. The heterogeneous cationic …
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Effect of ceria and zirconia on nanoparticulate rhodium catalysts
… of two surface coverages of rhodium on a non-porous high area alumina been synthesised; at 1.6 Rh and 4 wt % Rh loading. Ceria and zirconia have been deposited on the pre-supported Rh catalysts by the controlled surface reaction between the reduced Rh surface and an …
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Synthesis and application of rhodium(I) Fischer carbene complexes
In this study, novel rhodium(I) carbene complexes were synthesized and fully characterized via a carbene ligand transfer methodology from Group 6 Fischer carbene complex precursors and subsequent ligand modification. The classic Fischer route was followed towards the isolation of mono- and …
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Chemistry of Ruthenium and Rhodium Eta(4)-Thiophene Complexes
Reduction of ($(\eta\sp6$-$\rm C\sb6Me\sb6)Ru(\eta\sp5$-C$\sb4$R$\sb4$S)) (OTf)$\sb2$(C$\sb4$R$\sb4$S = C$\sb4$H$\sb4$S (1a), 2,5-Me$\sb2$C$\sb4$H$\sb2$S (1b), and 2,3,4,5-Me$\sb4$C$\sb4$S (1c)) and (($\eta\sp5$-C$\sb4$Me$\sb4$S)$\sb2$Ru) (OTf)$\sb2$ (1d) with Cp$\sb2$Co produces …
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