The three-dimensional aspects of molecular shape can be crucial to both properties and reactions. The Third Dimension explores the arrangements of atoms in molecules and in different types of solids. Initial chapters describe the common crystal structures and how they are related to close-packed arrangements of ions. Metallic, ionic, molecular and extended covalent crystals are covered; major types of crystal defects are also discussed. The book then introduces isomerism, and explores the stereochemical consequences of the tetrahedral carbon atom. Chirality is also investigated. The book concludes with a Case Study on Liquid Crystals, which describes structures, properties and applications. As visualisation in 3D is an important part of this book, the accompanying CD-ROMs provide video material, interactive questions and exercises using models to aid understanding of crystals, organic molecules and stereochemistry. All necessary programs are provided. The Molecular World series provides an integrated introduction to all branches of chemistry for both students wishing to specialise and those wishing to gain a broad understanding of chemistry and its relevance to the everyday world and to other areas of science. The books, with their Case Studies and accompanying multi-media interactive CD-ROMs, will also provide valuable resource material for teachers and lecturers. (The CD-ROMs are designed for use on a PC running Windows 95, 98, ME or 2000.)

Chemical Modeling equips the reader with the knowledge to understand the behaviour of solids, gases and liquids in terms of the basic properties of their atoms, molecules, and polymer chains. In particular the interactions between these fundamental building blocks and the intermolecular and intramolecular potentials are examined. Carefully structured, the book starts by the discussion of classical, quantum and statistical mechanics which then leads on to a discussion of modeling techniques applied to solids, gases and liquids. The subject is brought to life through many real life examples and practical illustrations. Features

• Classical mechanics and quantum mechanics are both introduced from a basic level
• Explains the relationships between microscopic and macroscopic quantities
• Gives an up-to-date treatment of a variety of chemical modeling techniques
• Avoids unnecessary mathematical rigour
• Carefully structured into ‘bite-sized’ chapters

Chemical modelling covers a wide range of disciplines and this book is the first stop for any materials scientist, biochemist, chemist or molecular physicist wishing to acquaint themselves with major developments in the applications and theory of chemical modelling. Containing both comprehensive and critical reviews, it is a convenient reference to the current literature. Coverage includes, but is not limited to, boron clusters, molecular modeling of inclusion complexes, modelling of circular dichroism for DNA and proteins, and the interface effect of nanocomposites as electrode materials for Li/Na ion batteries.

There have been significant developments in the use of knowledge-based expert systems in chemistry since the first edition of this book was published in 2009. This new edition has been thoroughly revised and updated to reflect the advances. The underlying theme of the book is still the need for computer systems that work with uncertain or qualitative data to support decision-making based on reasoned judgements. With the continuing evolution of regulations for the assessment of chemical hazards, and changes in thinking about how scientific decisions should be made, that need is ever greater. Knowledge-based expert systems are well established in chemistry, especially in relation to toxicology, and they are used routinely to support regulatory submissions. The effectiveness and continued acceptance of computer prediction depends on our ability to assess the trustworthiness of predictions and the validity of the models on which they are based. Written by a pioneer in the field, this book provides an essential reference for anyone interested in the uses of artificial intelligence for decision making in chemistry.

'Clary's account makes for fascinating reading, not least because of its clear style and copious citation of primary sources and original scientific articles. The author provides a compelling narrative of ... Schroedinger's departure in 1933 from a highly eminent position at the University of Berlin to a precarious, untenured position at Magdalen College ... with political and scientific considerations deftly woven together.' [Read Full Review]ScienceErwin Schroedinger was one of the greatest scientists of all time but it is not widely known that he was a Fellow at Magdalen College, Oxford in the 1930s. This book is an authoritative account of Schroedinger's time in Oxford by Sir David Clary, an expert on quantum chemistry and a former President of Magdalen College, who describes Schroedinger's remarkable life and scientific contributions in a language that can be understood by all. Through access to many unpublished manuscripts, the author reveals in unprecedented detail the events leading up to Schroedinger's sudden departure from Berlin in 1933, his arrival in Oxford and award of the Nobel Prize, his dramatic escape from the Nazis in Austria to return to Oxford, and his urgent flight from Belgium to Dublin at the start of the Second World War.The book presents many acute observations from Schroedinger's wife Anny and his daughter Ruth, who was born in Oxford and became an acquaintance of the author in the last years of her life. It also includes a remarkable letter sent to Schroedinger in Oxford from Adolf Hitler, thanking him for his services to the state as a professor in Berlin. Schroedinger's intense interactions with other great scientists who were also refugees during this period, including Albert Einstein and Max Born, are examined in the context of the chaotic political atmosphere of the time. Fascinating anecdotes of how this flamboyant Austrian scientist interacted with the President and Fellows of a highly traditional Oxford College in the 1930s are a novel feature of the book.A gripping and intimate narrative of one of the most colourful scientists in history, Schroedinger in Oxford explains how his revolutionary breakthrough in quantum mechanics has become such a central feature in 21st century science.

The quantum mechanical properties of small molecules provide the basis for our quantitative understanding of chemistry and a testing ground for new theories of molecular structure and reactivity. With modern methods, small molecular systems can be investigated in extraordinary detail by high-resolution spectroscopic techniques in the frequency or the time domains, and by complementary theoretical and computational advances. This combination of cutting-edge approaches provides rigorous tests of our understanding of quantum phenomena in chemistry. The chemical properties of small molecules continue to present rich challenges at the chemistry/physics interface since these molecules exhibit properties in isolation, and interact with their environments, in ways that are not yet fully understood. The coupled electronic and nuclear motions may lead to complex structural or dynamical features that can now be observed experimentally. From a theoretical point of view, these features can only be explained if the quantum nature of the atomic nuclei is considered together with the possible couplings between nuclear and electronic degrees of freedom. New developments, from both the theoretical and experimental side, are urgently needed if the properties of small molecules are to be optimally exploited in future technological, engineering and biological applications of outstanding importance. This Faraday Discussion will address the quantum dynamical properties of small molecules, both in isolation where extraordinarily detailed and precise measurements and calculations are now emerging, and when embedded in complex media such as molecular clusters, quantum fluids and bulk liquids. The Discussion will appeal to researchers working on both isolated and confined molecular systems. This volume covers four main themes: Precise Characterisation of Isolated Molecules Quantum Dynamics of Isolated Molecules Molecules in Confinement in Liquid Solvents Molecules in Confinement in Clusters, Quantum Solvents and Matrices

This new volume is devoted to molecular chemistry and its applications to the fields of biology. It looks at the integration of molecular chemistry with biomolecular engineering, with the goal of creating new biological or physical properties to address scientific or societal challenges. It takes a both multidisciplinary and interdisciplinary perspective on the interface between molecular biology, biophysical chemistry, and chemical engineering. Molecular Chemistry and Biomolecular Engineering: Integrating Theory and Research with Practice provides effective support for the development of the laboratory and data analysis skills that researchers will draw on time and again for the practical aspects and also gives a solid grounding in the broader transferable skills.

Recent years have seen tremendous progress in research on cold and controlled molecular collisions, both in theory and in experiment. The advent of techniques to prepare cold and ultracold molecules and ions, to store them in optical lattices or in charged quasicristalline structures, and to use them in crossed or merged beam experiments have opened many new possibilities to study the most fundamental aspects of molecular interactions. At the same time, theoretical work has made progress in tackling these problems and accurately describing quantum effects in complex systems, and in proposing viable options to control chemical reactions at ultralow energies. Through tutorials on both the theoretical and experimental aspects of research in cold and ultracold molecular collisions, this book provides advanced undergraduate students, graduate students and researchers with the foundations needed to understand this exciting field.

This study guide aims at explaining theoretical concepts encountered by practitioners applying theory to molecular science. This is a collection of short chapters, a manual, attempting to walk the reader through two types of topics: (i) those that are usually covered by standard texts but are difficult to grasp and (ii) topics not usually covered, but are essential for successful theoretical research. The main focus is on the latter. The philosophy of this book is not to cover a complete theory, but instead to provide a set of simple study cases helping to illustrate main concepts. The focus is on simplicity. Each section is made deliberately short, to enable the reader to easily grasp the contents. Sections are collated in themed chapters, and the advantage is that each section can be studied separately, as an introduction to more in-depth studies. Topics covered are related to elasticity, electrostatics, molecular dynamics and molecular spectroscopy, which form the foundation for many presently active research areas such as molecular biophysics and soft matter physics. The notes provide a uniform approach to all these areas, helping the reader to grasp the basic concepts from a common set of theoretical tools.

Modern drug discovery still relies heavily on random screening and empirical screening cascades to identify leads. As such, the process suffers high failure rates and escalating costs. Computational and quantitative approaches hold the promise of shifting the balance of success.

The books in this set provide the latest information on harnessing quantitative and computational methods for analysis, prediction and optimisation. Topics covered include structure-based design, molecular modelling, simulation and statistical models.

The set will not only be an essential reference, but also a source of inspiration for professionals in the pharmaceutical industry, and graduates interested in molecular interactions and drug discovery.

This set consists of:

Drug Design Strategies: Quantitative Approaches Edited by David J Livingstone and Andrew M Davis (978-1-84973-166-9, 2011, RSC Drug Discovery)

Computational Approaches to Nuclear Receptors Edited by Pietro Cozzini and Glen E Kellogg (978-1-84973-364-9, 2012, RSC Drug Discovery)

Physico-Chemical and Computational Approaches to Drug Discovery Edited by Javier Luque and Xavier Barril (978-1-84973-353-3, 2012, RSC Drug Discovery)

Towards Efficient Designing of Safe Nanomaterials: Innovative Merge of Computational Approaches and Experimental Techniques Edited by Jerzy Leszczynski and Tomasz Puzyn (978-1-84973-453-0, 2012, RSC Nanoscience & Nanotechnology)

Computational and Structural Approaches to Drug Discovery: Ligand-Protein Interactions Edited by Stephen Neidle and Robert Stroud (978-0-85404-365-1, 2007, RSC Biomolecular Sciences)

Computational Quantum Chemistry presents computational electronic structure theory as practised in terms of ab initio waveform methods and density functional approaches. Getting a full grasp of the field can often prove difficult, since essential topics fall outside of the scope of conventional chemistry education. This professional reference book provides a comprehensive introduction to the field. Postgraduate students and experienced researchers alike will appreciate Joseph McDouall's engaging writing style. The book is divided into five chapters, each providing a major aspect of the field. Electronic structure methods, the computation of molecular properties, methods for analysing the output from computations and the importance of relativistic effects on molecular properties are also discussed. Links to the websites of widely used software packages are provided so that the reader can gain first hand experience of using the techniques described in the book.

The concept of a chemical bond evolved from a variety of experimental observations. It became useful to understand, at times even predict, the molecular structure, reactivity and mechanism of chemical reactions. Every aspect of the concept of bonding received a quantitative interpretation from the advent of quantum mechanics and its application to chemistry.In Lectures on Chemical Bonding and Quantum Chemistry the reader will find a comprehensive discourse on the basic interpretation of the chemical bond as well as current understanding in terms of a 'dancing' molecule that not only travels, rotates and pulsates around an equilibrium molecular structure, but also interacts and collides with other molecules, thereby transferring linear and angular momentum characteristics and adjusting total energies. One will also find a thorough survey of quantum mechanical methodologies for calculation of molecular characteristics in specific states and their changes under spectroscopic transitions, tunneling, electron and proton transfer phenomena, and so on. Guides to more advanced levels of theory are also provided.

Tremendous research is taking place to make photoelectrochemical (PEC) water splitting technology a reality. Development of high performance PEC systems requires an understanding of the theory to design novel materials with attractive band gaps and stability. Focusing on theory and systems analysis, Advances in Photoelectrochemical Water Splitting provides an up-to-date review of this exciting research landscape. The book starts by addressing the challenges of water splitting followed by chapters on the theoretical design of PEC materials and their computational screening. The book then explores advances in identifying reaction intermediates in PEC materials as well as developments in solution processed photoelectrodes, photocatalyst sheets, and bipolar membranes. The last part of the book focuses on systems analysis, which lays out a roadmap of where researchers hope the fundamental research will lead us. Edited by world experts in the field of solar fuels, the book provides a comprehensive overview of photoelectrochemical water splitting, from theoretical aspects to systems analysis, for the energy research community.

Hyperspherical harmonics are extremely useful in nuclear physics and reactive scattering theory. However, their use has been confined to specialists with very strong backgrounds in mathematics. This book aims to change the theory of hyperspherical harmonics from an esoteric field, mastered by specialists, into an easily-used tool with a place in the working kit of all theoretical physicists, theoretical chemists and mathematicians. The theory presented here is accessible without the knowledge of Lie-groups and representation theory, and can be understood with an ordinary knowledge of calculus. The book is accompanied by programs and exercises designed for teaching and practical use.

This unique volume offers a clear perspective of the relevant methodology relating to the chemical theory of the next generation beyond the Born-Oppenheimer paradigm. It bridges the gap between cutting-edge technology of attosecond laser science and the theory of chemical reactivity. The essence of this book lies in the method of nonadiabatic electron wavepacket dynamic, which will set a new foundation for theoretical chemistry.In light of the great progress of molecular electronic structure theory (quantum chemistry), the authors show a new direction towards nonadiabatic electron dynamics, in which quantum wavepackets have been theoretically and experimentally revealed to bifurcate into pieces due to the strong kinematic interactions between electrons and nuclei.The applications range from nonadiabatic chemical reactions in photochemical dynamics to chemistry in densely quasi-degenerated electronic states that largely fluctuate through their mutual nonadiabatic couplings. The latter is termed as "chemistry without the potential energy surfaces" and thereby virtually no theoretical approach has been made yet.Restarting from such a novel foundation of theoretical chemistry, the authors cast new light even on the traditional chemical notions such as the Pauling resonance theory, proton transfer, singlet biradical reactions, and so on.

In a field as diverse as Chemical Modelling it can be difficult to keep up with the literature, or discover the latest applications of computational and theoretical chemistry. Specialist Periodical Reports present comprehensive and critical reviews of the recent literature, providing the reader with informed opinion and latest detailed information in their field. The latest volume of Chemical Modelling presents a diverse range of authors invited by the volume editors to review and report the major developments in the field. Topics include Quantum Chemistry of Large Systems, Theoretical Studies of Special Relativity in Atoms and Molecules, MOFs: From Theory Towards Applications, and Multi-Scale Modelling. For experienced researchers and those just entering the field of chemical modelling, this latest Specialist Periodical Report is an essential resource for any research group active in the field or chemical sciences library.

Organic materials with extraordinary magnetic properties promise a wide range of light, flexible, and inexpensive alternatives to familiar metal-based magnets. Individual organic molecules with high magnetic moments will be the foundation for design and fabrication of these materials.This book provides a systematic understanding of the structure and properties of organic magnetic molecules. After a summary of the phenomenon of magnetism at the molecular level, it presents a survey of the challenges to theoretical description and evaluation of the magnetic character of open-shell molecules, and an overview of recently developed methods and their successes and shortfalls. Several fields of application, including very strong organic molecular magnets and photo-magnetic switches, are surveyed. Finally, discussions on metal-based materials and simultaneously semiconducting and ferromagnetic extended systems and solids point the way toward future advances.The reader will find a comprehensive discourse on current understanding of magnetic molecules, a thorough survey of computational methods of characterizing known and imagined molecules, simple rules for design of larger magnetic systems, and a guide to opportunities for progress toward organic magnets.

Density Functional Theory (DFT) is a quantum mechanical modelling method, used in physics and chemistry to investigate the electronic structure (principally the ground state) of many-body systems, in particular atoms, molecules, and the condensed phases. This book provides current research in the study of the principles, applications and analysis of Density Functional Theory (DFT). Topics discussed include density functional treatment of interactions and chemical reactions at interfaces; applications of DFT calculations to lithium carbenoids and magnesium carbenoids; thermoelectric properties of low-dimensional materials by DFT; using DFT computations on the radical scavenging activity studies of natural phenolic compounds; polarisability of C60/C70 fullerene [2+1]- and [1+1]-adducts; DFT application to the calculation of properties of di- and trimethylnaphthalenes; transport calculations of organic materials; the evolution of DFT; the capabilities of DFT for materials design of alloys; and the fundamentals of energy density functionality in nuclear physics.

This is a comprehensive overview of state-of-the-art computational methods based on orbital-free formulation of density functional theory completed by the most recent developments concerning the exact properties, approximations, and interpretations of the relevant quantities in density functional theory. The book is a compilation of contributions stemming from a series of workshops which had been taking place since 2002. It not only chronicles many of the latest developments but also summarises some of the more significant ones. The chapters are mainly reviews of sub-domains but also include original research.

This book is a presentation of a qualitative theory of chemical bonding, stressing the physical processes which occur on bond formation. It differs from most (if not all) other books in that it does not seek to "rationalise" the phenomena of bonding by a series of mnemonic rules. A principal feature is a unified and consistent treatment across all types of bonding in organic, inorganic, and physical chemistry. Each chapter has an Assignment Section containing "problems" which might be usefully attempted to improve the understanding of the new material in that chapter. The new edition has had several appendices added which give support to concepts which, if included in the main text, would have hindered the main thrust of the presentation. These new appendices are an attempt to clarify oversights and errors which have been tacitly ignored and which have now become part of the conventional wisdom.

The Schroedinger equation is the master equation of quantum chemistry. The founders of quantum mechanics realised how this equation underpins essentially the whole of chemistry. However, they recognised that its exact application was much too complicated to be solvable at the time. More than two generations of researchers were left to work out how to achieve this ambitious goal for molecular systems of ever-increasing size. This book focuses on non-mainstream methods to solve the molecular electronic Schroedinger equation. Each method is based on a set of core ideas and this volume aims to explain these ideas clearly so that they become more accessible. By bringing together these non-standard methods, the book intends to inspire graduate students, postdoctoral researchers and academics to think of novel approaches. Is there a method out there that we have not thought of yet? Can we design a new method that combines the best of all worlds?

This book is a stop-gap contribution to the science and technology of carbon plasmas and carbon vapors. It strives to cover two strongly related fields: the molecular quantum theory of carbon plasmas and carbon nanostructures; and the molecular and atomic spectroscopy of such plasmas and vapors. These two fields of research are strongly intertwined and thus reinforce one another.

Even though the use of carbon nanostructures is increasing by the day and their practical uses are emerging, there is no modern review on carbon plasmas, especially from molecular theoretical and spectroscopic viewpoints. The importance of the present book is therefore great from both educational and practical aspects. This review might be the first step towards bringing such textbooks into existence for university education. Similarly, for applied and engineering works in carbon nanostructures, the book provides a theoretical salient point for technologists in the field.

Ions are ubiquitous in chemical, technological, ecological and biological processes. Characterizing their role in these processes in the first place requires the evaluation of the thermodynamic parameters associated with the solvation of a given ion. However, due to the constraint of electroneutrality, the involvement of surface effects and the ambiguous connection between microscopic and macroscopic descriptions, the determination of single-ion solvation properties via both experimental and theoretical approaches has turned out to be a very difficult and highly controversial problem. This unique book provides an up-to-date, compact and consistent account of the research field of single-ion solvation thermodynamics that has over one hundred years of history and still remains largely unsolved. By reviewing the various approaches employed to date, establishing the relevant connections between single-ion thermodynamics and electrochemistry, resolving conceptual ambiguities, and giving an exhaustive data compilation (in the context of alkali and halide hydration), this book provides a consistent synthesis, in depth understanding and clarification of a large and sometimes very confusing research field. The book is primarily aimed at researchers (professors, postgraduates, graduates, and industrial researchers) concerned with processes involving ionic solvation properties (these are ubiquitous, eg. in physical/organic/analytical chemistry, electrochemistry, biochemistry, pharmacology, geology, and ecology). Because of the concept definitions and data compilations it contains, it is also a useful reference book to have in a university library. Finally, it may be of general interest to anyone wanting to learn more about ions and solvation. Key features: - discusses both experimental and theoretical approaches, and establishes the connection between them - provides both an account of the past research (covering over one hundred years) and a discussion of current directions (in particular on the theoretical side) - involves a comprehensive reference list of over 2000 citations - employs a very consistent notation (including table of symbols and unambiguous definitions of all introduced quantities) - provides a discussion and clarification of ambiguous concepts (ie. concepts that have not been defined clearly, or have been defined differently by different authors, leading to confusion in past literature) - encompasses an exhaustive data compilation (in the restricted context of alkali and halide hydration), along with recommended values (after critical analysis of this literature data) - is illustrated by a number of synoptic colour figures, that will help the reader to grasp the connections between different concepts in one single picture

The interest to amino acid amides arises from their biological important role. Some C-nGBP\- amidated amino acids Ile, Val, Thr, Ser, Met, Trp, Gln and Arg have been studied by single crystal X-ray diffraction and their bioactivity have been compared with the corresponding amino acids due to most of mammalian peptide hormones as calcitonin, gastrin, neurokinins or neuropeptides possess a C-GBP\-terminal-amides. The most C-GBP\- amides are much more biologically active, comparing with the corresponding C-GBP\- terminal free acids. For example the "potency ratio" of peptide amide towards the corresponding peptide free acid in neurocinin is more than 40 000. Since the protonated forms of amino acid amides and C-GBP\-amidated peptides exists in the living cell their investigation could provide an understanding of their biological role. The choice of the acidity agent for the in vitro investigations are based manly of its own biological activity as for example squaric acid (H2Sq). Its application for synthesis of optically active amino acid derivatives with potential non-linear optical and electro-optical properties is well known, but its important biological role is intensively studied in last five years. A large number of medications based on H2Sq derivatives are effective inhibitors of protein tyrosine phosphatases or DNA polymerases from several viruses. H2Sq diamides replaced a phosphate diester linkage in oligodeoxynucleotide. Selective antagonist of ionotropic glutamate receptors is obtained by replacing of GBP^-carboxylic acid of a glutamate residue within a polyamine toxin with squaric acid derivatives. Some H2Sq-based peptides are inhibitors of matrix metalloprotease V1. These facts provoked the systematic investigations of hydrochlorides, hydrogensquarates and ester amides of squaric acid of amino acid amides of Ala, Arg, Tyr, Ser, Met, Ile, Lys, Tyr, Val, Leu, Pro and Phe. Some of them have been structurally characterized by single crystal X-ray diffraction. Their spectroscopic properties have been obtained using solid-state conventional and linearpolarised IR- and Raman spectroscopy and 1H- and 13C-NMR. However, the complicated spectroscopic data difficult in significant level their interpretation. Moreover, in the cases of hydrogensquarates and ester amides of squaric acid various intermolecular hydrogen bonds in solid-state with participation of H2Sq have been established. Having in mind that physical and chemical properties of above mentioned compounds can be precise calculated by means of ab initio and DFT methods at Hartee-Fock, MP2 and B3LYP level of theory, varying basis sets (6-31G*, 6-31G**, 6-31++G, 6-31++G*, 6-31++G**, 6-311G, 6-311G*, 6-311G** and 6-31++G**) have been employed. The results obtained allow a precise assignment of many vibrational bands to the corresponding normal modes as well as the electronic structure and conformational analysis have been carried out.