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Richard D. Adams

Bio: Richard D. Adams is an academic researcher from University of South Carolina. The author has contributed to research in topics: Ligand & Ruthenium. The author has an hindex of 45, co-authored 665 publications receiving 12134 citations. Previous affiliations of Richard D. Adams include University at Buffalo & Texas A&M University.
Topics: Ligand, Ruthenium, Osmium, Platinum, Cluster (physics)


Papers
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Book
01 Jan 1975
TL;DR: In this article, a low-field, time-resolved dynamic nuclear nmr detection experiment was conducted to demonstrate dynamic nuclear magnetic resonance spectroscopy structural and dynamic properties of amorphous solid.
Abstract: dynamic nuclear magnetic resonance spectroscopy dynamic nuclear magnetic resonance spectroscopy dynamic nuclear magnetic resonance spectroscopy dynamic nuclear magnetic resonance iopscience dynamic nuclear magnetic resonance spectroscopy nuclear magnetic resonance spectroscopy. structure and literature cited 1. l.m. jackman and f. a. cotton, dynamic introduction to dynamic nuclear polarization low-field, time-resolved dynamic nuclear nmr detection experiment 7: dynamic nmr spectroscopy (dated: april 19, 2010) nuclear magnetic resonance spectroscopy in dynamic nuclear magnetic resonance spectroscopy. structure and the study of intramolecular dynamics by nuclear magnetic fast dissolution dynamic nuclear polarization nmr c increasing the time resolution of dynamic nuclear spin dynamics basics of nuclear magnetic resonance quantitative determination of chemical processes by dynamic nuclear polarization enhanced nmr in the solid-state theories in spin dynamics of solid-state nuclear magnetic equivalence of fourier spectroscopy and slow passage in multiplequantum magic-angle spinning and dynamic-angle thz dynamic nuclear polarization nmr journal of magnetic resonance university of california nuclear magnetic resonance spectroscopy demonstrating dynamic nuclear magnetic resonance spectroscopy structural and dynamic properties of amorphous solid dynamic nuclear magnetic resonance spectroscopy nuclear magnetic resonance studies of biopolymer dynamics nuclear magnetic resonance studies of the dynamic aspects graphics from http://fs512.fshn.uiuc/3d-nmr-chazin progress in nuclear magnetic resonance spectroscopy progress in nuclear magnetic resonance spectroscopy chapter 1 fundamentals of nmr eth z dynamic nuclear polarization solid-state nmr in paramagnetic shift reagents in nuclear magnetic resonance dynamic nuclear polarization at 9 t applied to solid state advances and applications of dynamic-angle spinning a nuclear magnetic resonance investigation of the role of dynamic nuclear polarization solid-state nmr in nuclear magnetic resonance annual reviews letters ultrafast two-dimensional nuclear magnetic spin dynamics: basics of nuclear magnetic resonance by progress in nuclear magnetic resonance spectroscopy

500 citations

Book
01 Jan 1998
TL;DR: In this article, the authors propose a model for characterizing homogeneous reactions catalyzed by transition metal cluster complexes (E. Rosenberg & R. Laine). Activation of Ruthenium Clusters for Use in Catalysis: Approaches and Problems (G. Lavigne & B. de Bonneval).
Abstract: Concepts and Models for Characterizing Homogeneous Reactions Catalyzed by Transition Metal Cluster Complexes (E. Rosenberg & R. Laine). Activation of Ruthenium Clusters for Use in Catalysis: Approaches and Problems (G. Lavigne & B. de Bonneval). Catalysis by Mixed--Metal Clusters Containing Gold Phosphine Groupings (L. Pignolet). Catalysis by Sulfido Bridged Dimolybdenum Complexes (M. DuBois). Catalytic Applications of Dimolybdenum and Ditungsten Complexes Containing Multiple Metal--Metal Bond (M. McCann). Synthesis of Organic Compounds Catalyzed by Transition Metal Clusters (G. Siiss--Fink & M. Jahncke) Catalysis with Dirhodium (II) Complexes (M. Doyle). Catalytic Macrocyclization of Thietanes by Metal Carbonyl Cluster Complexes (R. Adams). Catalysis of Rh,Rh--Co, and Ir--Co Multinuclear Complexes and Its Applications to Organic Syntheses (I. Ojima & Z. Li). Bimetallic Homogeneous Hydroformylation (G. Stanley). Catalysis by Colloids (L. Lewis). Catalysis with Palladium Clusters (I. Moiseev & M. Vargaftik). Heterometallic Clusters for Heterogeneous Catalysis (P. Braunstein & J. Rose). Metal Cluster Catalysis Catalysts Dispersed on Solid Supports (B. Gates). Index.

319 citations

Journal ArticleDOI
TL;DR: The palladium atom that lies in the center of the heterocycle 7 was removed and the palladium removal was found to be partially reversible leading to an unusual example of host-guest behavior.
Abstract: The six-membered heavy atom heterocycles [Re2(CO)8(μ-SbPh2)(μ-H)]2, 5, and Pd[Re2(CO)8(μ-SbPh2)(μ-H)]2, 7, have been prepared by the palladium-catalyzed ring-opening cyclo-dimerization of the three-membered heterocycle Re2(CO)8(μ-SbPh2)(μ-H), 3. The palladium atom that lies in the center of the heterocycle 7 was removed to yield 5. The palladium removal was found to be partially reversible leading to an unusual example of host–guest behavior. A related dipalladium complex Pd2Re4(CO)16(μ4-SbPh)(μ3-SbPh2)(μ-Ph)(μ-H)2, 6, was also formed in these reactions of palladium with 3.

140 citations


Cited by
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Journal ArticleDOI
TL;DR: 1. Advantages and disadvantages of Chemical Redox Agents, 2. Reversible vs Irreversible ET Reagents, 3. Categorization of Reagent Strength.
Abstract: 1. Advantages of Chemical Redox Agents 878 2. Disadvantages of Chemical Redox Agents 879 C. Potentials in Nonaqueous Solvents 879 D. Reversible vs Irreversible ET Reagents 879 E. Categorization of Reagent Strength 881 II. Oxidants 881 A. Inorganic 881 1. Metal and Metal Complex Oxidants 881 2. Main Group Oxidants 887 B. Organic 891 1. Radical Cations 891 2. Carbocations 893 3. Cyanocarbons and Related Electron-Rich Compounds 894

3,432 citations

Journal ArticleDOI
TL;DR: The Review presents the recent developments and the use of NP catalysis in organic synthesis, for example, in hydrogenation and C--C coupling reactions, and the heterogeneous oxidation of CO on gold NPs.
Abstract: Interest in catalysis by metal nanoparticles (NPs) is increasing dramatically, as reflected by the large number of publications in the last five years. This field, "semi-heterogeneous catalysis", is at the frontier between homogeneous and heterogeneous catalysis, and progress has been made in the efficiency and selectivity of reactions and recovery and recyclability of the catalytic materials. Usually NP catalysts are prepared from a metal salt, a reducing agent, and a stabilizer and are supported on an oxide, charcoal, or a zeolite. Besides the polymers and oxides that used to be employed as standard, innovative stabilizers, media, and supports have appeared, such as dendrimers, specific ligands, ionic liquids, surfactants, membranes, carbon nanotubes, and a variety of oxides. Ligand-free procedures have provided remarkable results with extremely low metal loading. The Review presents the recent developments and the use of NP catalysis in organic synthesis, for example, in hydrogenation and C--C coupling reactions, and the heterogeneous oxidation of CO on gold NPs.

2,790 citations

Journal ArticleDOI
TL;DR: This Review will compare the results obtained from different systems and try to give a picture on how different types of metal species work in different reactions and give perspectives on the future directions toward better understanding of the catalytic behavior of different metal entities in a unifying manner.
Abstract: Metal species with different size (single atoms, nanoclusters, and nanoparticles) show different catalytic behavior for various heterogeneous catalytic reactions. It has been shown in the literature that many factors including the particle size, shape, chemical composition, metal–support interaction, and metal–reactant/solvent interaction can have significant influences on the catalytic properties of metal catalysts. The recent developments of well-controlled synthesis methodologies and advanced characterization tools allow one to correlate the relationships at the molecular level. In this Review, the electronic and geometric structures of single atoms, nanoclusters, and nanoparticles will be discussed. Furthermore, we will summarize the catalytic applications of single atoms, nanoclusters, and nanoparticles for different types of reactions, including CO oxidation, selective oxidation, selective hydrogenation, organic reactions, electrocatalytic, and photocatalytic reactions. We will compare the results o...

2,700 citations

Journal ArticleDOI
TL;DR: The focus of this review is on the area of enantioselective transition metal-catalyzed allylic alkylations which may involve C-C as well as C-X (X ) H or heteroatom) bond formation.
Abstract: Efficient and reliable amplification of chirality has borne its greatest fruit with transition metal-catalyzed reactions since enantiocontrol may often be imposed by replacing an achiral or chiral racemic ligand with one that is chiral and scalemic While the most thoroughly developed enantioselective transition metal-catalyzed reactions are those involving transfer of oxygen (epoxidation and dihydroxylation)1,2 and molecular hydrogen,3 the focus of this review is on the area of enantioselective transition metal-catalyzed allylic alkylations which may involve C-C as well as C-X (X ) H or heteroatom) bond formation4-9 The synthetic utility of transitionmetal-catalyzed allylic alkylations has been soundly demonstrated since its introduction nearly three decades ago10-21 In contrast to processes where the allyl moiety acts as the nucleophilic partner, we will limit our discussion to processes which result in nucleophilic displacements on allylic substrates (eq 1) Such reactions have been recorded with a broad

2,576 citations

Journal ArticleDOI
TL;DR: The geometries of 131 SBUs, their connectivity and composition of transition-metal carboxylate clusters which may serve as secondary building units (SBUs) towards construction and synthesis of metal-organic frameworks (MOFs).
Abstract: This critical review presents a comprehensive study of transition-metal carboxylate clusters which may serve as secondary building units (SBUs) towards construction and synthesis of metal–organic frameworks (MOFs). We describe the geometries of 131 SBUs, their connectivity and composition. This contribution presents a comprehensive list of the wide variety of transition-metal carboxylate clusters which may serve as secondary building units (SBUs) in the construction and synthesis of metal–organic frameworks. The SBUs discussed here were obtained from a search of molecules and extended structures archived in the Cambridge Structure Database (CSD, version 5.28, January 2007) which included only crystals containing metal carboxylate linkages (241 references).

2,145 citations