Organometallics of the f-Elements

Proceedings of the NATO Advanced Study Institute held at Sogesta, Urbino, Italy, September 11–22, 1978

Author: Marks

Publisher: Springer Science & Business Media

ISBN: 9400994540

Category: Science

Page: 517

View: 417

While the organometallic chemistry of the d-block transition elements has been a flourishing field for the past 25 years, it has only been in the last several years that dramatic activity and progJ'ess has occurred in the area of lanthanide and actinide organometallic chemistry. The f. -element organometallic research effort has been truly multinational and multidisciplinary. In a large number of countries, sCientists have become increasingly interested in the synthesis, reactivity, spectroscopy, and the molecular and electronic structures of f-element organometallic compounds. The backgrounds of these scientists range from organic, inorganic, nuclear, and catalytic chemistry to chemical and nuclear physics. The motivations for the study of f-element organometallics have been equally varied. In the area of basic research, there has been a growing realization that the lanthanides and actinides represent two unique and, to a great extent, neglected families of elements in which many fascinating aspects of chemistry and bonding remain to be explored. On a more practical level, an increasing number of these elements play important roles in nuclear energy production and in industrial catalytic processes. It has become apparent that efficiency and safety in both areas could greatly benefit from increased knowledge. In the past there has been no suitable international forum available for bringing together researchers in the diverse areas of f-element organometallic science mentioned above.

The f elements

Author: Nikolas Kaltsoyannis,Peter Scott

Publisher: Oxford University Press, USA


Category: Science

Page: 85

View: 2718

The lanthanides and actinides (the f elements) are rarely studied in detail by chemistry undergraduates. More often they appear as an afterthought in bonding, spectroscopy, magnetism, coordination chemistry, and organometallics courses. This is largely because of a lack of an accessible text treating the chemistry of these elements in one cover. Moreover, the placement of lanthanides and actinides in the closing pages of standard inorganic chemistry text books serves to marginalise these elements further. The f elements has therefore been written to fill a gap in the undergraduate chemistry textbook market. It covers much of the fundamental chemistry of the lanthanide and actinide elements, including coordination chemistry, solid state compounds, organometallic chemistry, electronic spectroscopy, and magnetism. Many comparisons are made between the chemistry of the lanthanides and actinides and that of the transition elements, which is generally much more familiar to undergraduate chemistry students. The book uses the chemistry of the f elements as a vehicle for the communication of several important chemical concepts that are not usually discussed in detail in undergraduate courses, for example the chemical consequences of relativity and the lanthanide and actinide contractions. Many important modern applications of f element chemistry, e.g. the use of actinides in nuclear power generation and of the lanthanides in magnetic resonance imaging and catalytic converters in motor vehicle exhausts, are also discussed in depth.

Chemistry of the f-Block Elements

Author: Helen C. Aspinall

Publisher: Routledge

ISBN: 135146115X

Category: Science

Page: 176

View: 8738

Visual Spatial Enquiry explores visual and textual ways of working within spatial research. Architects and spatial thinkers from the arts, social sciences and humanities present rich case studies from remote and regional settings in Australia to the suburbs of Los Angeles, and from gallery and university settings to community collaborations in Mongolia. Through these case studies the authors reappraise and reconsider research approaches, methods and processes within and across their fields. In spatial research diagramming can be used as a method to synthesise complex concepts into a succinct picture, whereas metaphors can add the richness of lived experiences. Drawing on the editors' own architectural backgrounds, this volume is organised into three key themes: seeing, doing and making space. In seeing space chapters consider observational research enquiries where developing empathy for the context and topic is as important as gathering concrete data. Doing space explores generative opportunities that inform new and innovative propositions, and making space looks at ways to rethink and reshape spatial and relational settings. Through this volume Creagh and McGann invite readers to find their own understandings of the value and practices of neighbouring fields including planning, geography, ethnography, architecture and art. This exploration will be of value to researchers looking to develop their cross-disciplinary literacy, and to design practitioners looking to enhance and articulate their research skills.

Fundamental and Technological Aspects of Organo-f-Element Chemistry

Author: Tobin J. Marks,Ignazio L. Fragalà

Publisher: Springer Science & Business Media

ISBN: 9400954069

Category: Science

Page: 414

View: 3063

The past decade has seen a dramatic acceleration of activity and interest in phenomena surrounding lanthanide and actinide organo metallic compounds. Around the world, active research in organo-f element synthesis, chemistry, catalysis, crystallography, and quantum chemistry is in progress. This activity has spanned a remarkably wide range of disciplines, from synthetic/mechanistic inorganic and organic chemistry to radiochemistry, catalytic chemistry, spectroscopy (vibra tional, optical, magnetic resonance, photoelectron, Mossbauer), X-ray and neutron diffraction structural analysis, as well as to crystal field and molecular orbital theoretical studies at the interface of chemistry and physics. These investigations have been motivated both by fundamental and applied goals. The evidence that f-element organo metallic compounds have unique chemical and physical properties which cannot be duplicated by organometallic compounds of d-block elements has suggested many new areas of endeavor and application. For these reasons, a great many scientists felt the need for some international forum devoted exclusively to the subject of lanthanide and actinide organometallic compounds. In September of 1978, a NATO Advanced Study Institute entitled, "Organometallics of the f-Elements," was held at the SOGESTA Conference Center near Urbino, Italy. It was the universal feeling of the partic ipants that this first meeting was a great success and that vital international communication and collaboration had been stimulated. The principal lectures at this Institute were published by Reidel in 1979 as part of the NATO ASI Monograph Series ("Organometallics of the f-Elements," T. J. Marks and R. D. Fischer, editors).

Synthesis of Lanthanide and Actinide Compounds

Author: G. Meyer,Lester R. Morss

Publisher: Springer Science & Business Media

ISBN: 9780792310181

Category: Science

Page: 368

View: 3706

The history of the rare earths has entered its third century; trans uranium elements are now a half century old. Both the lanthanide and actinide ele­ ments, 30 elements altogether, are f elements, meaninj that their metallic 2 1 1 electronic configurations are typically 6s 5d 4f" and 7s 6d 5f" respectively. To an elementary approximation as summarized in the 'average inorganic chemistry textbook, these configurations cause their chemistry to be described by the trivalent state accompanied by less interesting effects such as the lanthanide contraction. However, the discovery of divalent and tetravalent lanthanides and di- to seven-valent actinides hinted at the existence of more interesting although still classic solid-state and coor­ dination chemistry. Metallic halides and chalcogenides and electron-poor cluster compounds have been the outgrowth of many synthetic efforts during the past 25 years or so. These days, one can say that the lan­ thanides and actinides are not at all boring; the fascination arises from every element being an individual, having its own chemistry.

Grounded Phonology

Author: Diana B. Archangeli,Douglas George Pulleyblank

Publisher: MIT Press

ISBN: 9780262011372

Category: Language Arts & Disciplines

Page: 502

View: 7376

This breakthrough study argues for a significant link between phonetics and phonology. Its authors propose that phonological rules and representations are tightly constrained by the interaction of formal conditions drawn from a limited universal pool and substantive conditions of a phonetically motivated nature. They support this proposal through principled accounts of a variety of topics such as vowel harmony, neutrality, and under specification.Unlike much work on this topic, Archangeli and Pulleyblank provide an explicit account of their assumptions, defined in a comprehensive theory of phonological rules and representations. The authors survey an impressive range of data, including an investigation of cross-linguistic patterns of ATR Harmony. They demonstrate that their theory is flexible enough to account for variation in individual phonological systems, yet it is firmly constrained by a small set of well-motivated principles. Extensive references throughout the book to published and unpublished work provide a valuable roadmap through this semicharted terrain.The approach in Grounded Phonology is modular, in that it presents a theory composed of subtheories, each of which is independently motivated, and the role of each module is to constrain the range of possibilities (of wellformedness)in its domain. Differences among languages can arise from differing intramodular selections or from interaction among modules.Diana Archangeli is Associate Professor in the Department of Linguistics at the University of Arizona. Douglas Pulleyblank is Associate Professor in the Department of Linguistics at the University of British Columbia.

Lattice-ordered Rings and Modules

Author: Stuart A. Steinberg

Publisher: Springer Science & Business Media

ISBN: 1441917217

Category: Mathematics

Page: 630

View: 4838

This book provides an exposition of the algebraic aspects of the theory of lattice-ordered rings and lattice-ordered modules. All of the background material on rings, modules, and lattice-ordered groups necessary to make the work self-contained and accessible to a variety of readers is included. Filling a gap in the literature, Lattice-Ordered Rings and Modules may be used as a textbook or for self-study by graduate students and researchers studying lattice-ordered rings and lattice-ordered modules. Steinberg presents the material through 800+ extensive examples of varying levels of difficulty along with numerous exercises at the end of each section. Key topics include: lattice-ordered groups, rings, and fields; archimedean $l$-groups; f-rings and larger varieties of $l$-rings; the category of f-modules; various commutativity results.

The F Programming Language

Author: Michael Metcalf,John Ker Reid

Publisher: Oxford University Press, USA

ISBN: 9780198500261

Category: Computers

Page: 240

View: 1302

The F programming language is a dramatic new development in scientific programming. Building on the well-established strengths of the Fortran family of languages, it is carefully crafted to be both safe and regular, whilst retaining the enormously powerful numerical capabilities of its parentlanguage, Fortran 90, as well as its data abstraction capability. Thus, an array language becomes available as part of a medium-size, widely-available language for the first time. In this respect, the language is clearly superior to older ones such as Pascal, C, and Basic. The book begins with anintroductory chapter, then describes, in turn, the features of the language: language elements, expressions and assignments, control constructs, program units and procedures, array features, intrinsic procedures, and the input/output facilities. It is completed by six appendices, including thedifference between F and Fortran 90, and solutions to most of the exercises. In the absence of a formal standard for F, this book is the defining document for the language, setting out the complete syntax and semantics of the language in a readable but thorough way. It is essential reading forusers of F.

Comprehensive Organometallic Chemistry III

Groups 3-4 and the F Elements

Author: David Michael P. Mingos,Manfred Bochmann,Robert H. Crabtree

Publisher: Elsevier Science Limited

ISBN: 9780080445946

Category: Science

Page: 1203

View: 8552

Provides essential information for any chemist or technologist who needs to use or apply organometallic compounds. Provides a comprehensive overview of recent developments in the field and attempts to predict trends in the field over the next ten years.

Transition Metal Compounds

Author: Daniel I. Khomskii

Publisher: Cambridge University Press

ISBN: 1316060802

Category: Science

Page: N.A

View: 4407

Describing all aspects of the physics of transition metal compounds, this book provides a comprehensive overview of this unique and diverse class of solids. Beginning with the basic concepts of the physics of strongly correlated electron systems, the structure of transition metal ions, and the behaviours of transition metal ions in crystals, it goes on to cover more advanced topics such as metal-insulator transitions, orbital ordering, and novel phenomena such as multiferroics, systems with oxygen holes, and high-Tc superconductivity. Each chapter concludes with a summary of key facts and concepts, presenting all the most important information in a consistent and concise manner. Set within a modern conceptual framework, and providing a complete treatment of the fundamental factors and mechanisms that determine the properties of transition metal compounds, this is an invaluable resource for graduate students, researchers and industrial practitioners in solid state physics and chemistry, materials science, and inorganic chemistry.

Computational Methods in Lanthanide and Actinide Chemistry

Author: Michael Dolg

Publisher: John Wiley & Sons

ISBN: 1118688295

Category: Science

Page: 480

View: 8148

The f-elements and their compounds often possess an unusually complex electronic structure, governed by the high number of electronic states arising from open f-shells as well as large relativistic and electron correlation effects. A correct theoretical description of these elements poses the highest challenges to theory. Computational Methods in Lanthanide and Actinide Chemistry summarizes state-of-the-art electronic structure methods applicable for quantum chemical calculations of lanthanide and actinide systems and presents a broad overview of their most recent applications to atoms, molecules and solids. The book contains sixteen chapters, written by leading experts in method development as well as in theoretical investigations of f-element systems. Topics covered include: Relativistic configuration interaction calculations for lanthanide and actinide anions Study of actinides by relativistic coupled cluster methods Relativistic all-electron approaches to the study of f- element chemistry Relativistic pseudopotentials and their applications Gaussian basis sets for lanthanide and actinide elements Applied computational actinide chemistry This book will serve as a comprehensive reference work for quantum chemists and computational chemists, both those already working in, and those planning to enter the field of quantum chemistry for f-elements. Experimentalists will also find important information concerning the capabilities of modern quantum chemical methods to assist in the interpretation or even to predict the outcome of their experiments.

The Chemical Bond

Chemical Bonding Across the Periodic Table

Author: Gernot Frenking,Sason Shaik

Publisher: John Wiley & Sons

ISBN: 352766467X

Category: Science

Page: 566

View: 8260

A unique overview of the different kinds of chemical bonds that can be found in the periodic table, from the main-group elements to transition elements, lanthanides and actinides. It takes into account the many developments that have taken place in the field over the past few decades due to the rapid advances in quantum chemical models and faster computers. This is the perfect complement to "Chemical Bonding - Fundamentals and Models" by the same editors, who are two of the top scientists working on this topic, each with extensive experience and important connections within the community.

Nuclear Wastes

Technologies for Separations and Transmutation

Author: National Research Council,Division on Earth and Life Studies,Commission on Geosciences, Environment and Resources,Committee on Separations Technology and Transmutation Systems

Publisher: National Academies Press

ISBN: 0309052262

Category: Science

Page: 592

View: 372

Disposal of radioactive waste from nuclear weapons production and power generation has caused public outcry and political consternation. Nuclear Wastes presents a critical review of some waste management and disposal alternatives to the current national policy of direct disposal of light water reactor spent fuel. The book offers clearcut conclusions for what the nation should do today and what solutions should be explored for tomorrow. The committee examines the currently used "once-through" fuel cycle versus different alternatives of separations and transmutation technology systems, by which hazardous radionuclides are converted to nuclides that are either stable or radioactive with short half-lives. The volume provides detailed findings and conclusions about the status and feasibility of plutonium extraction and more advanced separations technologies, as well as three principal transmutation concepts for commercial reactor spent fuel. The book discusses nuclear proliferation; the U.S. nuclear regulatory structure; issues of health, safety and transportation; the proposed sale of electrical energy as a means of paying for the transmutation system; and other key issues.

A Strategic Vision for Department of Energy Environmental Quality Research and Development

Author: National Research Council,Division on Earth and Life Studies,Board on Radioactive Waste Management,Committee on Building a Long-Term Environmental Quality Research and Development Program in the Department of Energy

Publisher: National Academies Press

ISBN: 0309075602

Category: Science

Page: 182

View: 3384

The National Academies' National Research Council undertook this study in response to a request from the Under Secretary of Energy to provide strategic advice on how the Department of Energy could improve its Environmental Quality R&D portfolio. The committee recommends that DOE develop strategic goals and objectives for its EQ business line that explicitly incorporate a more comprehensive, long-term view of its EQ responsibilities. For example, these goals and objectives should emphasize long-term stewardship and the importance of limiting contamination and materials management problems, including the generation of wastes and contaminated media, in ongoing and future DOE operations.

Research and Development on a Salt Processing Alternative for High-Level Waste at the Savannah River Site

Author: National Research Council,Division on Earth and Life Studies,Board on Chemical Sciences and Technology,Board on Radioactive Waste Management,Committee on Radionuclide Separation Processes for High-Level Waste at the Savannah River Site

Publisher: National Academies Press

ISBN: 0309075939

Category: Science

Page: 96

View: 6822

The U.S. Department of Energy (DOE) is nearing a decision on how to process 30 million gallons of high-level radioactive waste salt solutions at the Savannah River Site in South Carolina to remove strontium, actinides, and cesium for immobilization in glass and eventual shipment to a geologic repository. The department is sponsoring research and development (R&D) work on four alternative processes and plans to use the results to make a downselection decision in a June 2001 time frame. The DOE requested that the National Research Council help inform this decision by addressing the following charge: 1. evaluate the adequacy of the criteria that will be used by the department to select from among the candidate processes under consideration; 2. evaluate the progress and results of the research and development work that is being undertaken on these candidate processes; and 3. assess whether the technical uncertainties have been sufficiently resolved to proceed with downsizing the list of candidate processes. Responses to the last two points are provided in this report. Research and Development on a Salt Processing Alternative for High-Level Waste at the Savannah River Site focuses exclusively on the technical issues related to the candidate processes for radionuclide removal from high-level waste salt solutions at SRS. The committee's interim report served as a response to the first point of this charge, and may be read in Appendix B. In that report, the committee found that DOE's proposed criteria are an acceptable basis for selecting among the candidate processes under consideration, but that the criteria should not be implemented in a way that relies on a single numerical "total score."

Heavy-Fermion Systems

Author: Prasanta Misra

Publisher: Elsevier

ISBN: 9780080554679

Category: Technology & Engineering

Page: 352

View: 3377

The book on Heavy-Fermion Systems is a part of the Book series "Handbook of Metal Physics", each volume of which is written to facilitate the research of Ph.D. students, faculty and other researchers in a specific area. The Heavy-Fermions (sometimes known as Heavy-Electrons) is a loosely defined collection of intermetallic compounds containing rare-earth (mostly Ce) or actinide (mostly U) elements. These unusual names were given due to the large effective mass (100-1,000 times greater than the mass of a free electron) below a critical temperature. They have a variety of ground states including superconducting, antiferromagnetic, paramagnetic or semiconducting. Some display unusual magnetic properties such as magnetic quantum critical point and metamagnetism. This book is essentially a summary as well as a critical review of the theoretical and experimental work done on Heavy Fermions. · Extensive research references. · Comprehensive review of a very rapidly growing number of theories. · Summary of all important experiments. · Comparison with other highly correlated systems such as High-Tc Superconductors. · Possible Technological applications.

Lanthanides and Actinides in Molecular Magnetism

Author: Richard A. Layfield,Muralee Murugesu

Publisher: John Wiley & Sons

ISBN: 3527673490

Category: Science

Page: 368

View: 1931

The first reference on this rapidly growing topic provides an essential up-to-date guide to current and emerging trends. A group of international experts has been carefully selected by the editors to cover all the central aspects, with a focus on molecular species while also including industrial applications. The resulting unique overview is a must-have for researchers, both in academia and industry, who are entering or already working in the field.

Advances in Organometallic Chemistry

Author: Anthony F. Hill,Mark J. Fink

Publisher: Academic Press

ISBN: 0124078419

Category: Science

Page: 484

View: 8414

Almost all branches of chemistry and material science now interface with organometallic chemistry--the study of compounds containing carbon-metal bonds. This widely acclaimed serial contains authoritative reviews that address all aspects of organometallic chemistry, a field that has expanded enormously since the publication of Volume 1 in 1964. Informs and updates on all the latest developments in the field Contributions from leading authorities and industry experts