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Books > Science & Mathematics > Chemistry > Organic chemistry

Organometallics as Catalysts in the Fine Chemical Industry (Hardcover, 2012 ed.): Matthias Beller, Hans Ulrich Blaser Organometallics as Catalysts in the Fine Chemical Industry (Hardcover, 2012 ed.)
Matthias Beller, Hans Ulrich Blaser
R5,571 Discovery Miles 55 710 Ships in 10 - 15 working days

Johannes G. de Vries: Pd-catalyzed coupling reactions.- Gregory T. Whiteker and Christopher J. Cobley: Applications of Rhodium-Catalyzed Hydroformylation in the Pharmaceutical, Agrochemical and Fragrance Industries.- Philippe Dupau: Ruthenium-catalyzed Selective Hydrogenation for Flavor and Fragrance Applications.- Hans-Ulrich Blaser, Benoit Pugin and Felix Spindler: Asymmetric Hydrogenation.- Ioannis Houpis: Case Study: Sequential Pd-catalyzed Cross-Coupling Reactions; Challenges on Scale-up.- Adriano F. Indolese: Pilot Plant Scale Synthesis of an Aryl-Indole - Scale up of a Suzuki Coupling.- Per Ryberg: Development of a Mild and Robust Method for Palladium Catalysed Cyanation on Large Scale.- Cheng-yi Chen: Application of Ring Closing Metathesis Strategy to the Synthesis of Vaniprevir (MK-7009), a 20-Membered Macrocyclic HCV Protease Inhibitor.

Self-Production of Supramolecular Structures - From Synthetic Structures to Models of Minimal Living Systems (Hardcover, 1994... Self-Production of Supramolecular Structures - From Synthetic Structures to Models of Minimal Living Systems (Hardcover, 1994 ed.)
Gail R. Fleischaker, S. Colonna, Pier Luigi Luisi
R4,542 Discovery Miles 45 420 Ships in 10 - 15 working days

How did life begin on the Earth? The units of life are cells, which can be defined as bounded systems of molecules that capture energy and nutrients from the environment -- systems that expand, reproduce, and evolve over time, often into more complex systems. This book is the proceedings of a unique meeting, sponsored by NATO and held in Maratea, Italy, that brought together for the first time an international group of investigators who share an interest in how molecules self-assemble into supramolecular structures, and how those structures may have contributed to the origin of life. The book is written at a moderately technical level, appropriate for use by researchers and by students in upper-level undergraduate and graduate courses in biochemistry and molecular biology. The overall interest of its subject matter provides an excellent introduction for students who wish to understand how the foundational knowledge of chemistry and physics can be applied to one of the most fundamental questions now facing the scientific community. The editors are pioneers in defining what we mean by the living state, particularly the manner in which simple molecular systems can assume complex associations and functions, including the ability to reproduce. Each chapter of the book presents an up-to-date report of highly significant research. Two of the authors received medals from the National Academy of Science USA in 1994, and other research reported in the book has been featured in internationally recognized journals such Scientific American, Time, and Discover.

Specialty Polymers (Hardcover, 2nd ed. 1997): R.W. Dyson Specialty Polymers (Hardcover, 2nd ed. 1997)
R.W. Dyson
R2,916 Discovery Miles 29 160 Ships in 10 - 15 working days

R. W. DYSON There will be few readers of this book who are not aware of the contribution that polymers make to modern life. They are to be seen around the home, at work, in transport and in leisure pursuits. They take many forms which include plastic mouldings and extrusions, plastic film and sheet, plastic laminates (fibreglass and formica), rubber gloves, hoses, tyres and sealing rings, fibres for textiles and carpets and so on, cellular products for cushioning and thermal insulation, adhesives and coating materials such as paints and varnishes. The majority of these polymers are synthetic and are derived from oil products. The most important of these in terms of tonnage used are polymers based upon styrene, vinyl chloride, ethylene, propylene and butadiene among plastics and rubber materials, and nylons, polyethyleneterephthalate and poly acrylonitrile among fibres. The total amount of these polymers used each year runs into millions of tonnes. These polymers are sometimes known as commodity polymers because they are used for everyday artefacts. They are available in many grades and formats to meet a variety of applications and processing techniques. The properties can be adjusted by using additives such as heat and light stabilizers, plasticizers, and reinforcing materials. Often, grades are specially designed and formulated to meet particular requirements and, in a sense, these might be regarded as specialities. Much has been written about these materials elsewhere and they are not the concern of this book.

General and Synthetic Methods - Volume 16 (Hardcover, Edition.): R.P.C. Cousins, Stuart K. Richardson, Tim Harrison, Jo B.... General and Synthetic Methods - Volume 16 (Hardcover, Edition.)
R.P.C. Cousins, Stuart K. Richardson, Tim Harrison, Jo B. Sweeney, G.M. Robertson, …
R10,959 Discovery Miles 109 590 Ships in 10 - 15 working days

Specialist Periodical Reports provide systematic and detailed review coverage of progress in the major areas of chemical research. Written by experts in their specialist fields the series creates a unique service for the active research chemist, supplying regular critical in-depth accounts of progress in particular areas of chemistry. For over 80 years the Royal Society of Chemistry and its predecessor, the Chemical Society, have been publishing reports charting developments in chemistry, which originally took the form of Annual Reports. However, by 1967 the whole spectrum of chemistry could no longer be contained within one volume and the series Specialist Periodical Reports was born. The Annual Reports themselves still existed but were divided into two, and subsequently three, volumes covering Inorganic, Organic and Physical Chemistry. For more general coverage of the highlights in chemistry they remain a 'must'. Since that time the SPR series has altered according to the fluctuating degree of activity in various fields of chemistry. Some titles have remained unchanged, while others have altered their emphasis along with their titles; some have been combined under a new name whereas others have had to be discontinued. The current list of Specialist Periodical Reports can be seen on the inside flap of this volume.

Amino Acids, Peptides and Proteins - Volume 5 (Hardcover, Edition.): R C Sheppard Amino Acids, Peptides and Proteins - Volume 5 (Hardcover, Edition.)
R C Sheppard
R10,949 Discovery Miles 109 490 Ships in 10 - 15 working days

Specialist Periodical Reports provide systematic and detailed review coverage of progress in the major areas of chemical research. Written by experts in their specialist fields the series creates a unique service for the active research chemist, supplying regular critical in-depth accounts of progress in particular areas of chemistry. For over 80 years the Royal Society of Chemistry and its predecessor, the Chemical Society, have been publishing reports charting developments in chemistry, which originally took the form of Annual Reports. However, by 1967 the whole spectrum of chemistry could no longer be contained within one volume and the series Specialist Periodical Reports was born. The Annual Reports themselves still existed but were divided into two, and subsequently three, volumes covering Inorganic, Organic and Physical Chemistry. For more general coverage of the highlights in chemistry they remain a 'must'. Since that time the SPR series has altered according to the fluctuating degree of activity in various fields of chemistry. Some titles have remained unchanged, while others have altered their emphasis along with their titles; some have been combined under a new name whereas others have had to be discontinued. The current list of Specialist Periodical Reports can be seen on the inside flap of this volume.

Machining of Polymer Composites (Hardcover, 2009 ed.): Jamal Ahmad Machining of Polymer Composites (Hardcover, 2009 ed.)
Jamal Ahmad
R2,913 Discovery Miles 29 130 Ships in 10 - 15 working days

This excellent volume will serve as an indispensable reference and source book for process design, tool and production engineers in composite manufacturing. It provides the reader with a comprehensive treatment of the theory of machining as it applies to fiber reinforced polymer composites. It covers the latest technical advances in the area of machining and tooling, and discusses the applications of fiber reinforced polymer composites in the aircraft and automotive industries.

Principles of Polymer Design and Synthesis (Hardcover, 2013 ed.): Wei-Fang Su Principles of Polymer Design and Synthesis (Hardcover, 2013 ed.)
Wei-Fang Su
R4,206 R3,636 Discovery Miles 36 360 Save R570 (14%) Ships in 10 - 15 working days

How can a scientist or engineer synthesize and utilize polymers to solve our daily problems? This introductory text, aimed at the advanced undergraduate or graduate student, provides future scientists and engineers with the fundamental knowledge of polymer design and synthesis to achieve specific properties required in everyday applications. In the first five chapters, this book discusses the properties and characterization of polymers, since designing a polymer initially requires us to understand the effects of chemical structure on physical and chemical characteristics. Six further chapters discuss the principles of polymerization reactions including step, radical chain, ionic chain, chain copolymerization, coordination and ring opening. Finally, material is also included on how commonly known polymers are synthesized in a laboratory and a factory. This book is suitable for a one semester course in polymer chemistry and does not demand prior knowledge of polymer science.

Chemical Reactions in Organic and Inorganic Constrained Systems (Hardcover, 1986 ed.): R Setton Chemical Reactions in Organic and Inorganic Constrained Systems (Hardcover, 1986 ed.)
R Setton
R5,856 Discovery Miles 58 560 Ships in 10 - 15 working days

The basic idea of the NATO International Exchange Program for funding an Advanced Research Workshop on "Chemical Reactions in Organic and Inorganic Constrained Systems" was to contribute to a better under standing of the influence of configurational constraints on reaction mechanisms, as imposed on reagents by organic or inorganic templates. The original character of the Workshop was to bring together organic and inorganic chemists with this common interest in order to promote the exchange of ideas and, eventually, interdisciplinary research. All the participants to the Workshop agreed that the discussions were stimulating and fruitful. The judgement of the reader of the Proceedings may perhaps be more restrictive because the director (Professor J. J. FRIPIAT) and co-director (Professor P. SINAY), faced with the impossible task of covering such an enormous domain, were obliged to select, somewhat arbitrarily, a limited number of topics which seemed to them to be the most important. Their choice may be discussed and there surely are important gaps, with fields which were not considered. However, both organisers believe that, within the limited span of time and number of contributors, most of the exciting areas were addressed. Dr. WARNHEIM was kind enough to write a commentary on the Workshop; his summary, written with the hindsight of a few weeks, supports, we believe, this opinion. Dr. SETTON has accepted the burden of collecting and shaping (not selectively) the manuscripts. This book would not be what it is without his efficient contribution as scientific secretary of the Workshop."

Landmark Experiments in Protein Science (Paperback): Pascal Leclair Landmark Experiments in Protein Science (Paperback)
Pascal Leclair
R1,588 Discovery Miles 15 880 Ships in 9 - 17 working days

Describes landmark experiments in cell biology and biochemistry Discusses the "How" and "Why" of historically important experiments Includes primary, original data and graphs Emphasizes biological techniques, which helps understand how many of the experiments performed were possible. Documents, chronologically, how each result fed into the next experiments.

Organic Electronics (Hardcover, 2010 ed.): Gregor Meller, Tibor Grasser Organic Electronics (Hardcover, 2010 ed.)
Gregor Meller, Tibor Grasser
R8,338 Discovery Miles 83 380 Ships in 10 - 15 working days

Dear Readers, Since the ground-breaking, Nobel-prize crowned work of Heeger, MacDiarmid, and Shirakawa on molecularly doped polymers and polymers with an alternating bonding structure at the end of the 1970s, the academic and industrial research on hydrocarbon-based semiconducting materials and devices has made encouraging progress. The strengths of semiconducting polymers are currently mainly unfolding in cheap and easily assembled thin ?lm transistors, light emitting diodes, and organic solar cells. The use of so-called "plastic chips" ranges from lightweight, portable devices over large-area applications to gadgets demanding a degree of mechanical ?exibility, which would overstress conventionaldevices based on inorganic,perfect crystals. The ?eld of organic electronics has evolved quite dynamically during the last few years; thus consumer electronics based on molecular semiconductors has gained suf?cient market attractiveness to be launched by the major manufacturers in the recent past. Nonetheless, the numerous challenges related to organic device physics and the physics of ordered and disordered molecular solids are still the subjects of a cont- uing lively debate. The future of organic microelectronics will unavoidably lead to new devi- physical insights and hence to novel compounds and device architectures of - hanced complexity. Thus, the early evolution of predictive models and precise, computationally effective simulation tools for computer-aided analysis and design of promising device prototypes will be of crucial importance.

Carbohydrate Chemistry - Volume 12 (Hardcover): John F Kennedy, N. R. Williams Carbohydrate Chemistry - Volume 12 (Hardcover)
John F Kennedy, N. R. Williams
R10,961 Discovery Miles 109 610 Ships in 10 - 15 working days

Carbohydrate Chemistry provides review coverage of all publications relevant to the chemistry of monosaccharides and oligosaccharides in a given year. The amount of research in this field appearing in the organic chemical literature is increasing because of the enhanced importance of the subject, especially in areas of medicinal chemistry and biology. In no part of the field is this more apparent than in the synthesis of oligosaccharides required by scientists working in glycobiology. Clycomedicinal chemistry and its reliance on carbohydrate synthesis is now very well established, for example, by the preparation of specific carbohydrate- based antigens, especially cancer-specific oligosaccharides and glycoconjugates. Coverage of topics such as nucleosides, amino-sugars, alditols and cyclitols also covers much research of relevance to biological and medicinal chemistry. Each volume of the series brings together references to all published work in given areas of the subject and serves as a comprehensive database for the active research chemist Specialist Periodical Reports provide systematic and detailed review coverage in major areas of chemical research. Compiled by teams of leading authorities in the relevant subject areas, the series creates a unique service for the active research chemist, with regular, in-depth accounts of progress in particular fields of chemistry. Subject coverage within different volumes of a given title is similar and publication is on an annual or biennial basis.

Comprehensive Medicinal Chemistry III (Hardcover, 3rd edition): Samuel Chackalamannil, David Rotella, Simon Ward Comprehensive Medicinal Chemistry III (Hardcover, 3rd edition)
Samuel Chackalamannil, David Rotella, Simon Ward
R166,322 Discovery Miles 1 663 220 Ships in 10 - 15 working days

Comprehensive Medicinal Chemistry III, Eight Volume Set provides a contemporary and forward-looking critical analysis and summary of recent developments, emerging trends, and recently identified new areas where medicinal chemistry is having an impact. The discipline of medicinal chemistry continues to evolve as it adapts to new opportunities and strives to solve new challenges. These include drug targeting, biomolecular therapeutics, development of chemical biology tools, data collection and analysis, in silico models as predictors for biological properties, identification and validation of new targets, approaches to quantify target engagement, new methods for synthesis of drug candidates such as green chemistry, development of novel scaffolds for drug discovery, and the role of regulatory agencies in drug discovery.

Phosphorous Heterocycles I (Hardcover, 2009 ed.): Raj K Bansal Phosphorous Heterocycles I (Hardcover, 2009 ed.)
Raj K Bansal
R8,332 Discovery Miles 83 320 Ships in 10 - 15 working days

The next article includes the description of the rich chemistry of phosphinines, including azaphosphinines. The sixth article deals with synthetic approaches to different types of 1- heterophosphacyclanes, including four-, five-, and six-membered P-heterocycles. The next two articles cover the chemistry of phosphorus containing mac- cycles. The phosphorus containing calixarenes have attracted much attention in recent years due to their various functions such as metal cations binding, catalysis, molecular recogination, and bioactivity. Likewise, other phosphorus-containing macrocycles, cryptands, and dendrimers find various uses in analytical chemistry and biochemistry. We hope to include the following articles in the second volume on phosphorous heterocycles: Diazaphospholes Selected phosphorous heterocycles containing a stereogenic phosphorus Heterophenes carrying phosphorus functional groups as key structures The synthesis and chemistry of the phospholane ring system Synthesis and bioactivity of 2,5-dihydro-1,2-oxaphosphole-2-oxide derivatives Recent developments in the chemistry of N-heterocyclic phosphines. I would be failing in my duty if I do not express my sincere thanks to the people at Springer, particularly Ms. Birgit Kollmar-Thoni and Ms. Ingrid Samide, for coordinating the project with great dedication.

Interphases and Mesophases in Polymer Crystallization II (Hardcover, 2005 ed.): Giuseppe Allegra Interphases and Mesophases in Polymer Crystallization II (Hardcover, 2005 ed.)
Giuseppe Allegra; Contributions by A Abe, Auriemma, S. Bracco, A. Comotti, …
R5,701 Discovery Miles 57 010 Ships in 10 - 15 working days
Aliphatic Chemistry - Volume 3 (Hardcover, Edition.): A. McKillop Aliphatic Chemistry - Volume 3 (Hardcover, Edition.)
A. McKillop
R10,892 Discovery Miles 108 920 Ships in 10 - 15 working days

Specialist Periodical Reports provide systematic and detailed review coverage of progress in the major areas of chemical research. Written by experts in their specialist fields the series creates a unique service for the active research chemist, supplying regular critical in-depth accounts of progress in particular areas of chemistry. For over 80 years the Royal Society of Chemistry and its predecessor, the Chemical Society, have been publishing reports charting developments in chemistry, which originally took the form of Annual Reports. However, by 1967 the whole spectrum of chemistry could no longer be contained within one volume and the series Specialist Periodical Reports was born. The Annual Reports themselves still existed but were divided into two, and subsequently three, volumes covering Inorganic, Organic and Physical Chemistry. For more general coverage of the highlights in chemistry they remain a 'must'. Since that time the SPR series has altered according to the fluctuating degree of activity in various fields of chemistry. Some titles have remained unchanged, while others have altered their emphasis along with their titles; some have been combined under a new name whereas others have had to be discontinued.

Polycondensation - History and New Results (Hardcover, 2014 ed.): Hans Kricheldorf Polycondensation - History and New Results (Hardcover, 2014 ed.)
Hans Kricheldorf
R4,188 R3,618 Discovery Miles 36 180 Save R570 (14%) Ships in 10 - 15 working days

This book reports on origin and history of polycondensation chemistry beginning in the first half of the 19th century. Furthermore, history and inventors of the most important polycondensates, such as Nylons, PET or polycarbonates, are described. The classical theory of step-growth polymerizations is discussed in the light of the latest experimental and theoretical results. Particular emphasis is laid on the role of cyclization reactions. Special categories of polycondensation processes are discussed in more detail: syntheses of hyperbranched and multicyclic polymers, non-stoichiometric polycondensations, interfacial polycondensations, solid state polycondensations, condensative chain polymerizations etc.

Rhodium Catalyzed Hydroformylation (Hardcover, 2002 ed.): Piet W.N.M. van Leeuwen, Carmen Claver Rhodium Catalyzed Hydroformylation (Hardcover, 2002 ed.)
Piet W.N.M. van Leeuwen, Carmen Claver
R4,521 Discovery Miles 45 210 Ships in 10 - 15 working days

In the last decade there have been numerous advances in the area of rhodium-catalyzed hydroformylation, such as highly selective catalysts of industrial importance, new insights into mechanisms of the reaction, very selective asymmetric catalysts, in situ characterization and application to organic synthesis. The views on hydroformylation which still prevail in the current textbooks have become obsolete in several respects. Therefore, it was felt timely to collect these advances in a book.

The book contains a series of chapters discussing several rhodium systems arranged according to ligand type, including asymmetric ligands, a chapter on applications in organic chemistry, a chapter on modern processes and separations, and a chapter on catalyst preparation and laboratory techniques. This book concentrates on highlights, rather than a concise review mentioning all articles in just one line. The book aims at an audience of advanced students, experts in the field, and scientists from related fields. The didactic approach also makes it useful as a guide for an advanced course.

Enzymatic Reactions in Organic Media (Hardcover, 1996 ed.): A. Koskinen, A. Klibanov Enzymatic Reactions in Organic Media (Hardcover, 1996 ed.)
A. Koskinen, A. Klibanov
R4,538 Discovery Miles 45 380 Ships in 10 - 15 working days

The outlook of organic synthesis has changed many times during its tractable history. The initial focus on the synthesis of substances typical of living matter, exemplified by the first examples of organic chemistry through the synthesis of urea from inorganic substances by Liebig, was accepted as the birth of organic chemistry, and thus also of organic synthesis. Although the early developments in organic synthesis closely followed the pursuit of molecules typical in nature, towards the end of the 19th century, societal pressures placed higher demands on chemical methods appropriate for the emerging age of industrialization. This led to vast amounts of information being generated through the discovery of synthetic reactions, spectroscopic techniques and reaction mechanisms. The basic organic functional group transformations were discovered and improved during the early part of this century. Reaction mechanisms were elucidated at a growing pace, and extremely powerful spectroscopic tools, such as infrared, nuclear magnetic resonance and mass spectrometry were introduced as everyday tools for a practising organic chemist. By the 1950s, many practitioners were ready to agree that almost every molecule could be syn thesized. Some difficult stereochemical problems were exceptions; for example Woodward concluded that erythromycin was a "hopelessly complex target." This frustration led to a hectic phase of development of new and increasingly more ingenious protecting group strategies and functional group transformations, and also saw the emergence of asymmetric synthesis."

Non-Covalent Multi-Porphyrin Assemblies - Synthesis and Properties (Hardcover, 2006 ed.): Enzo Alessio Non-Covalent Multi-Porphyrin Assemblies - Synthesis and Properties (Hardcover, 2006 ed.)
Enzo Alessio
R8,332 Discovery Miles 83 320 Ships in 10 - 15 working days
Degradable Aliphatic Polyesters (Hardcover, 2002 ed.): A-C Albertsson Degradable Aliphatic Polyesters (Hardcover, 2002 ed.)
A-C Albertsson; Contributions by A-C Albertsson, U. Edlund, M Hakkarainen, S. Karlsson, …
R6,152 Discovery Miles 61 520 Ships in 10 - 15 working days

A renewed interest in aliphatic polyesters has resulted in developing materials important in the biomedical and ecological fields. Mainly materials such as PLA and PCL homopolymers have so far been used in most applications. There are many other monomers which can be used. Different molecular structures give a wider range of physical properties as well as the possibility of regulating the degradation rate. By using different types of initiators and catalysts, ring-opening polymerization of lactones and lactides provides macromolecules with advanced molecular architectures. In the future, new degradable polymers should be able to participate in the metabolism of nature. Some examples of novel polymers with inherent environmentally favorable properties such as renewability and degradability and a series of interesting monomers found in the metabolisms and cycles of nature are given.

Analysis of Chiral Organic Molecules - Methodology and Applications (Hardcover, Reprint 2011): Peter Schreier, Alexander... Analysis of Chiral Organic Molecules - Methodology and Applications (Hardcover, Reprint 2011)
Peter Schreier, Alexander Bernreuther, Manfred Huffer
R3,569 Discovery Miles 35 690 Ships in 10 - 15 working days

For readers at least moderately familiar with the theory of analyzing volatile aroma compounds, an introduction to the wide range of techniques for analyzing chiral molecules. They include chiroptical methods such as polarimetry, optical rotation dispersion and circular dichroism; liquid, gas, super

From Single Molecules to Nanoscopically Structured Materials (Hardcover, 2014 ed.): Thomas Basche, Klaus Mullen, Manfred Schmidt From Single Molecules to Nanoscopically Structured Materials (Hardcover, 2014 ed.)
Thomas Basche, Klaus Mullen, Manfred Schmidt
R6,605 Discovery Miles 66 050 Ships in 10 - 15 working days

Mechanical Properties of Single Molecules and Polymer Aggregates Rudiger Berger, Kurt Binder, Gregor Diezemann, Jurgen Gauss, Mark Helm, Katharina Landfester, Wolfgang Paul (Halle), Peter Virnau. Optical Properties of Individual Molecular Aggregates and Nano Particles Thomas Basche, Hans-Jurgen Butt, Gregor Diezemann, Jurgen Gauss, Klaus Mullen, Harald Paulsen, Carsten Sonnichsen, Rudolf Zentel. Structure Formation of Polymeric Building Blocks I: Self-assembly of Copolymers Kurt Binder, Holger Frey, Andreas Kilbinger (Univ. Fribourg), Ute Kolb, Michael Maskos (IMM Mainz), Wolfgang Paul (Univ. Halle), Hans Wolfgang Spiess. Structure Formation of Polymeric Building Blocks II: Complex Polymer Architectures Kurt Binder, Hans Jurgen Butt, Angelika Kuhnle, Klaus Mullen, Wolfgang Paul (Univ. Halle), Erwin Schmidt, Manfred Schmidt, Hans Wolfgang Spiess, Thomas Vilgis. Structure Formation of Polymeric Building Blocks III: Polymer Complexes in Biological Applications Kurt Kremer, Heiko Luhmann, Christine Peter, Friederike Schmid, Erwin Schmidt, Manfred Schmidt, Eva Sinner (Univ. of Natural Resources, Vienna), Tanja Weil (Univ. Ulm)."

Organometallic Bonding and Reactivity - Fundamental Studies (Hardcover, 1999 ed.): J.M. Brown Organometallic Bonding and Reactivity - Fundamental Studies (Hardcover, 1999 ed.)
J.M. Brown; Contributions by P. B. Armentrout; Edited by P. Hofmann; Contributions by D. Braga, A. Dedieu, …
R5,585 Discovery Miles 55 850 Ships in 10 - 15 working days

General The making and breaking of carbon-metal bonds is fundamental to all the p- cesses of organometallic chemistry and moreover plays a significant role in - mogeneous as well as heterogeneous catalysis. This rather blunt statement - phasises the extent to which a proper understanding of the structure, energetics and reactivity of C-M bonds is at the core of the discipline. In order to accept it, a proper definition of the terms involved is required. Quite simply we define the metal-carbon bond in its broadest sense to embrace carbon linked to transiti- metals, lanthanides and actinides, and main group metals. We do not dist- guish between formally covalent single or multiple bonding on the one hand and q-bonding on the other. In the studies to be described in the following chapters, the emphasis will be on transition metal complexes and insofar as the fun- mentals come under scrutiny, simple metal alkyls or related species (metal al- nyl, alkynyl, aryl, or allyl) will play an emphatic part. The central role of metal alkyls and their congeners and especially the role of their metal carbon linkage in homogeneous catalysis may be appreciated by considering some key reaction steps leading to their formation or breakdown. There follows a few prominent examples of transition metal mediated stoichiometric or catalytic processes: - In homogeneous hydrogenation of double bonds, the stepwise reaction of an q2-coordinated alkene with dihydrogen gives first an alkyl metal hydride, and then the decoordinated alkane by elimination.

Crystallization of Nanoscaled Colloids (Hardcover, 2013 ed.): Philip G. Born Crystallization of Nanoscaled Colloids (Hardcover, 2013 ed.)
Philip G. Born
R4,297 R3,440 Discovery Miles 34 400 Save R857 (20%) Ships in 10 - 15 working days

This thesis deals with the processes that create ordered assemblies from disordered nanoparticles. Ordered packings of nanoscale particles can exhibit unusual properties. This work investigates the self-assembly of such particles, a process widely employed for the generation of ordered structures, but not yet well understood. In situ methods are used to observe the assembly of sub-micron polymer lattices and sub-10 nm gold particles into crystalline monolayers and aggregates. On the basis of these results, the book develops new models that describe the competition between different influences, such as thermal agitation and directional forces. It suggests necessary criteria that lead to the emergence of order.

Development of Novel Hydrogen-Bond Donor Catalysts (Hardcover, 2013 ed.): Tsubasa Inokuma Development of Novel Hydrogen-Bond Donor Catalysts (Hardcover, 2013 ed.)
Tsubasa Inokuma
R1,503 Discovery Miles 15 030 Ships in 10 - 15 working days

This work describes novel, effective hydrogen-bond (HB) donor catalysts based on a known bifunctional tertiary amine-thiourea, a privileged structure, which has been proven to be one of the most widely used organocatalysts. These HB donor catalysts derived from quinazoline and benzothiadiazine were initially synthesized as novel HB donors with their HB-donating abilities being measured by analytical methods. They were found to be effective for a variety of asymmetric transformations including Michael reactions of a, b- unsaturated imides and hydrazination reactions of 1,3-dicarbonyl compounds. Thiourea catalysts that have an additional functional group are also described. Specifically, thioureas that bear a hydroxyl group were synthesized and subsequently used as novel bifunctional organocatalysts for catalytic, asymmetric Petasis-type reactions involving organoboronic acids as nucleophiles. These addition reactions were difficult to achieve using existing organocatalysts. One of the developed catalytic methods can be applied to the synthesis of biologically interesting peptide- derived compounds possessing unnatural vinyl glycine moieties. These findings introduce new criteria required for the development of organocatalysts for asymmetric reactions, thus making a significant contribution to the field of organocatalysis.

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