The Weak Hydrogen Bond

In Structural Chemistry and Biology
Author: Gautam R. Desiraju,Thomas Steiner
Publisher: Oxford University Press on Demand
ISBN: 9780198509707
Category: Science
Page: 507
View: 6267

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Review from previous edition 'For crystallographers interested in future advances in the study of hydrogen bonding and their implications for crystal engineering and structural biology, this is a must-read book ' Acta Crystallographica'It is a real pleasure to read the book' Crystallography News'This book is an important monograph for those working on the related structural chemistry of the weak hydrogen bond' MoleculesThe weak or non-conventional hydrogen bond has been the subject of intense scrutiny over recent years. Now available in paperback, this highly acclaimed book provides a critical assessment on this interesting and occasionally controverstial interaction type.

The Weak Hydrogen Bond

In Structural Chemistry and Biology
Author: Gautam R. Desiraju,Thomas Steiner
Publisher: Oxford University Press, USA
ISBN: 9780198502524
Category: Language Arts & Disciplines
Page: 507
View: 6078

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The weak or non-conventional hydrogen bond has been the subject of intense scrutiny over recent years. Thought the existence of this type of hydrogen bond was suggested many years ago it was generally relegated to a subsidiary position when compared to the stronger and more well-known forms ofhydrogen bonds. However, a growing body of experimental and theoretical evidence now confirms that hydrogen bonds like C-H...O, O-H..., C-H... and even bonds such as O-H...metal play distinctive roles in structural chemistry and biology. In this book the authors provide a critical assessment on thisinteresting and occasionally controversial interaction type. This book will be of use to all those interested in structural and supramolecular science.

The Nature of the Hydrogen Bond

Outline of a Comprehensive Hydrogen Bond Theory
Author: Gastone Gilli,Paola Gilli
Publisher: OUP Oxford
ISBN: 0191580279
Category: Science
Page: 330
View: 2483

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Hydrogen bond (H-bond) effects are known: it makes sea water liquid, joins cellulose microfibrils in trees, shapes DNA into genes and polypeptide chains into wool, hair, muscles or enzymes. Its true nature is less known and we may still wonder why O-H...O bond energies range from less than 1 to more than 30 kcal/mol without apparent reason. This H-bond puzzle is re-examined here from its very beginning and presented as an inclusive compilation of experimental H-bond energies and geometries. New concepts emerge from this analysis: new classes of systematically strong H-bonds (CAHBs and RAHBs: charge- and resonance-assisted H-bonds); full H-bond classification in six classes (the six chemical leitmotifs); and assessment of the covalent nature of strong H-bonds. This leads to three distinct but inter-consistent models able to rationalize the H-bond and predict its strength, based on classical VB theory, matching of donor-acceptor acid-base parameters (PA or pKa), or shape of the H-bond proton-transfer pathway. Applications survey a number of systems where strong H-bonds play an important functional role, namely drug-receptor binding, enzymatic catalysis, ion-transport through cell membranes, crystal design and molecular mechanisms of functional materials.

Hydrogen Bonding - New Insights


Author: Slawomir Grabowski
Publisher: Springer Science & Business Media
ISBN: 140204853X
Category: Science
Page: 524
View: 872

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This book uses examples from experimental studies to illustrate theoretical investigations, allowing greater understanding of hydrogen bonding phenomena. The most important topics in recent studies are covered. This volume is an invaluable resource that will be of particular interest to physical and theoretical chemists, spectroscopists, crystallographers and those involved with chemical physics.

An Introduction to Hydrogen Bonding


Author: George A. Jeffrey
Publisher: Oxford University Press on Demand
ISBN: 9780195095494
Category: Fiction
Page: 303
View: 9394

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Hydrogen bonds range from the very strong, comparable with covalent bonds, to the very weak, comparable with van der Waals forces. Most hydrogen bonds are weak attractions with a binding strength about one-tenth of that of a normal covalent bond. Nevertheless, they are very important. Without them, all wooden structures would collapse, cement would crumble, oceans would vaporize, and all living things would disintegrate into inanimate matter. An easy-to-read supplement to the often brief descriptions of hydrogen bonding found in most undergraduate chemistry and molecular biology textbooks, An Introduction to Hydrogen Bonding describes and discusses the current ideas concerning hydrogen bonding, ranging from the very strong to the very weak, with introductions to the experimental and theoretical methods involved. Ideal for courses in chemistry and biochemistry, it will also be useful for structural biology and crystallography courses. For students and researchers interested in supramolecular chemistry, biological structure and recognition, and other sophisticated concepts and methodologies, it provides a careful selection of key references from the vast hydrogen bonding literature.

Diffuse X-Ray Scattering and Models of Disorder


Author: Thomas Richard Welberry
Publisher: Oxford University Press on Demand
ISBN: 0198528582
Category: Science
Page: 266
View: 2026

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Diffuse X-ray scattering is a rich (virtually untapped) source of local structural information over and above that obtained by conventional crystallography. The book aims to show how computer simulation of a model crystal provides a general method by which diffuse scattering of all kinds and from all types of materials can be interpreted and analysed.

The Basics of Crystallography and Diffraction


Author: Christopher Hammond
Publisher: Oxford University Press, USA
ISBN: 9780198505525
Category: Science
Page: 331
View: 5321

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A classic textbook providing a clear and comprehensive introduction to the topic of crystallography and diffraction for undregraduate and beginning graduate students and lecturers in physics, chemistry, materials and earth sciences. For this second edition the existing material has been throughly updated.

Handbook of Computational Chemistry


Author: Jerzy Leszczynski
Publisher: Springer Science & Business Media
ISBN: 940070710X
Category: Computers
Page: 1427
View: 5632

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This handbook is a guide to current methods of computational chemistry, explaining their limitations and advantages and providing examples of their applications. The first part outlines methods, the balance of volumes present numerous important applications.

Fundamentals of Crystallography


Author: Carmelo Giacovazzo
Publisher: Oxford University Press, USA
ISBN: 9780198509585
Category: Science
Page: 825
View: 1658

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Crystallography and structure theory have recently received increasing interest due to their role in understanding biological structures, high-temperature superconductors, and effects on mineral properties related to changes in temperature and pressure. This text offers an account of the wide range of crystallography in various branches of science.The fundamentals, the most frequently used procedures, and experimental techniques are all described, and a number of appendices are devoted to more specialist aspects. The book is an updated edition with emphasis on the range of topical applications. Illustrations should help to clarify the subject matter. To provide a better understanding of the basics of crystallography, a compact disk has been added to this edition, offering the facilities of modern graphics to simulate experiments, show complex images, and provide a number of exercises.

Chemistry and Biology of Heparin and Heparan Sulfate


Author: Hari G. Garg,Robert J. Linhardt,Charles A. Hales
Publisher: Elsevier
ISBN: 9780080529059
Category: Science
Page: 792
View: 7342

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The chemistry, biochemistry and pharmacology of heparin and heparan sulfate have been and continue to be a major scientific undertaking - heparin and its derivative remain important drugs in clinical practice. Chemistry and Biology of Heparin and Heparan Sulfate provides readers with an insight into the chemistry, biology and clinical applications of heparin and heparan sulfate and examines their function in various physiological and pathological conditions. Providing a wealth of useful information, no other tome covers the diversity of topics in the field. Students, doctors, chemists, biochemists, and research scientists will find this book an invaluable source for updating their current knowledge of developments in this area. Comprehensively reviews all aspects of heparin and heparan sulfate research Uniquely describes the chemistry, biology and clinical application of heparins and heparan sulfates in one work Provides an invaluable source of knowledge of current developments for chemists, biochemists, medical doctors, researchers, students and practitioners

Crystallography of Quasicrystals

Concepts, Methods and Structures
Author: Walter Steurer,Sofia Deloudi
Publisher: Springer Science & Business Media
ISBN: 3642018998
Category: Science
Page: 384
View: 3308

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From tilings to quasicrystal structures and from surfaces to the n-dimensional approach, this book gives a full, self-contained in-depth description of the crystallography of quasicrystals. It aims not only at conveying the concepts and a precise picture of the structures of quasicrystals, but it also enables the interested reader to enter the field of quasicrystal structure analysis. Going beyond metallic quasicrystals, it also describes the new, dynamically growing field of photonic quasicrystals. The readership will be graduate students and researchers in crystallography, solid-state physics, materials science, solid- state chemistry and applied mathematics.

Calcium Orthophosphates

Applications in Nature, Biology, and Medicine
Author: Sergey V. Dorozhkin
Publisher: CRC Press
ISBN: 9814364177
Category: Science
Page: 850
View: 4939

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Due to a great chemical similarity with the biological calcified tissues, many calcium orthophosphates possess remarkable biocompatibility and bioactivity. Materials scientists use this property extensively to construct artificial bone grafts that are either entirely made of or only surface-coated with the biologically relevant calcium orthophosphates. Porous scaffolds made of calcium orthophosphates are very promising tools for tissue engineering applications. A comprehensive overview of calcium orthophosphates, this book highlights their importance and biomedical uses.

The Crystal as a Supramolecular Entity


Author: Gautam R. Desiraju
Publisher: John Wiley & Sons
ISBN: 0470511427
Category: Science
Page: 326
View: 1011

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Supramolecular chemistry involves the study and synthesis of very large molecules which are used in complex chemical reactions, and have great potential in areas such as medicine, electronics, and optics. Offers a comprehensive overview of crystals and supramolecular entities.

Mathematical Techniques in Crystallography and Materials Science


Author: Edward Prince
Publisher: Springer Science & Business Media
ISBN: 3642187110
Category: Science
Page: 224
View: 2142

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This practical guide and reference serves as a unified source book for students and professionals, and it provides a solid basis for further studies in more specialized literature. Based Prince’s decades of practical experience, it can be recommended as an introduction for beginners in crystallography, as a refresher and handy guide for crystallographers working on specific problems, and as a reference for others seeking a dictionary of basic mathematical and crystallographic terms. The third edition further clarifies key points.

Innovations in Chemical Biology


Author: Bilge Sener
Publisher: Springer Science & Business Media
ISBN: 1402069553
Category: Science
Page: 428
View: 1947

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This book includes 49 chapters presented as plenary , invited lectures and posters at the conference. Six plenary lectures have published in an issue of Pure and Applied Chemistry, Vol. 79, No. 12, 2007; the titles of these presentations are given as an Annex at the end of the book. I thank all contrib utors for the preparation of their presentations. It is sad to report that Professor Hitoshi Ohtaki, one of the founders of the Eurasia conferences and contributors passed away on November 5, 2006. Professor Ohtaki enthusiastically promoted international cooperation and took it upon himself to p- licize Japanese science to the wider world. His contribution in this book will serve as a memorable contribution to that goal. He will be missed by all of us. This book is dedicated to his memory. Professor Dr . Bilge S ̧ ener Editor Memorial Tribute to Professor Dr. Hitoshi Ohtaki Curriculum Vitae of Hitoshi Ohtaki Date of Birth September 16, 1932 Place of Birth T ok yo, Japan Date of Decease November 5, 2006 (at the age of 74) Addr ess 3-9-406 Namiki-2-chome, Kanazawa-ku, Yokohama, Japan Institution Chair Professor of The Research Organization of Science and Engineering, Ritsumeikan University Guest Professor of Yokohama City University Education Bachelor of Science, Nagoya University, 1955 Master of Science, Nagoya University, 1957 Doctor of Science, Nagoya University, 1961 ix x Memorial Tribute to Professor Dr.

Aperiodic Crystals

From Modulated Phases to Quasicrystals
Author: Ted Janssen,Gervais Chapuis,Marc de Boissieu
Publisher: Oxford University Press
ISBN: 0198567774
Category: Science
Page: 466
View: 5624

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Most materials and crystals have an atomic structure which is described by a regular stacking of a microscopic fundamental unit, the unit cell. However, there are also many well ordered materials without such a unit cell. This book deals with the structure determination and a discussion of the main special properties of these materials.

Uniting Electron Crystallography and Powder Diffraction


Author: Ute Kolb,Kenneth Shankland,Louisa Meshi,Anatoly Avilov,William I.F David
Publisher: Springer
ISBN: 9400755805
Category: Science
Page: 434
View: 3768

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The polycrystalline and nanocrystalline states play an increasingly important role in exploiting the properties of materials, encompassing applications as diverse as pharmaceuticals, catalysts, solar cells and energy storage. A knowledge of the three-dimensional atomic and molecular structure of materials is essential for understanding and controlling their properties, yet traditional single-crystal X-ray diffraction methods lose their power when only polycrystalline and nanocrystalline samples are available. It is here that powder diffraction and single-crystal electron diffraction techniques take over, substantially extending the range of applicability of the crystallographic principles of structure determination. This volume, a collection of teaching contributions presented at the Crystallographic Course in Erice in 2011, clearly describes the fundamentals and the state-of-the-art of powder diffraction and electron diffraction methods in materials characterisation, encompassing a diverse range of disciplines and materials stretching from archeometry to zeolites. As such, it is a comprehensive and valuable resource for those wishing to gain an understanding of the broad applicability of these two rapidly developing fields.

Journal


Author: American Chemical Society
Publisher: N.A
ISBN: N.A
Category: Chemistry
Page: N.A
View: 8864

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