Computational Quantum Chemistry

Computational Quantum Chemistry
Author: Ram Yatan Prasad,Pranita
Publsiher: CRC Press
Total Pages: 713
Release: 2021-03-10
ISBN 10: 100034469X
ISBN 13: 9781000344691
Language: EN, FR, DE, ES & NL

Computational Quantum Chemistry Book Review:

Computational Quantum Chemistry, Second Edition, is an extremely useful tool for teaching and research alike. It stipulates information in an accessible manner for scientific investigators, researchers and entrepreneurs. The book supplies an overview of the field and explains the fundamental underlying principles. It also gives the knowledge of numerous comparisons of different methods. The book consists of a wider range of applications in each chapter. It also provides a number of references which will be useful for academic and industrial researchers. It includes a large number of worked-out examples and unsolved problems for enhancing the computational skill of the users. Features Includes comprehensive coverage of most essential basic concepts Achieves greater clarity with improved planning of topics and is reader-friendly Deals with the mathematical techniques which will help readers to more efficient problem solving Explains a structured approach for mathematical derivations A reference book for academicians and scientific investigators Ram Yatan Prasad, PhD, DSc (India), DSc (hc) Colombo, is a Professor of Chemistry and former Vice Chancellor of S.K.M University, Jharkhand, India. Pranita, PhD, DSc (hc) Sri Lanka, FICS, is an Assistant Professor of Chemistry at Vinoba Bhave University, India.

Handbook of Computational Quantum Chemistry

Handbook of Computational Quantum Chemistry
Author: David B. Cook
Publsiher: Courier Corporation
Total Pages: 805
Release: 2005-08-02
ISBN 10: 0486443078
ISBN 13: 9780486443072
Language: EN, FR, DE, ES & NL

Handbook of Computational Quantum Chemistry Book Review:

This comprehensive text provides upper-level undergraduates and graduate students with an accessible introduction to the implementation of quantum ideas in molecular modeling, exploring practical applications alongside theoretical explanations. Topics include the Hartree-Fock method; matrix SCF equations; implementation of the closed-shell case; introduction to molecular integrals; and much more. 1998 edition.

Computational Quantum Chemistry

Computational Quantum Chemistry
Author: Charles M. Quinn
Publsiher: Elsevier
Total Pages: 237
Release: 2002-02-28
ISBN 10: 9780080488530
ISBN 13: 0080488536
Language: EN, FR, DE, ES & NL

Computational Quantum Chemistry Book Review:

Computational Quantum Chemistry removes much of the mystery of modern computer programs for molecular orbital calculations by showing how to develop Excel spreadsheets to perform model calculations and investigate the properties of basis sets. Using the book together with the CD-ROM provides a unique interactive learning tool. In addition, because of the integration of theory with working examples on the CD-ROM, the reader can apply advanced features available in the spreadsheet to other applications in chemistry, physics, and a variety of disciplines that require the solution of differential equations. This book and CD-ROM makes a valuable companion for instructors, course designers, and students. It is suitable for direct applications in practical courses in theoretical chemistry and atomic physics, as well as for teaching advanced features of Excel in IT courses.

Computational Quantum Chemistry

Computational Quantum Chemistry
Author: Joseph J W McDouall
Publsiher: Royal Society of Chemistry
Total Pages: 284
Release: 2015-11-09
ISBN 10: 1782625860
ISBN 13: 9781782625865
Language: EN, FR, DE, ES & NL

Computational Quantum Chemistry Book Review:

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. Dr McDouall has more than 25 years experience in theoretical chemistry; as a reader at the University of Manchester his research interests include the application of quantum chemical methods to the elucidation of chemical problems and the development and implementation of electronic structure methods that permit the accurate prediction of chemical structures and molecular properties.

Computational Quantum Chemistry

Computational Quantum Chemistry
Author: Masoud Soroush
Publsiher: Unknown
Total Pages: 400
Release: 2018-10
ISBN 10: 9780128159835
ISBN 13: 0128159839
Language: EN, FR, DE, ES & NL

Computational Quantum Chemistry Book Review:

Computational Quantum Chemistry: Applications to Polymerization Reactions consolidates extensive research results, couples them with computational fundamentals, and systematically presents them in a way that is ideal for researcher, industry professionals and students. The book provides inclusive coverage of various theoretical advances made over the past decade, giving readers access to the most up-to-date research, fundamentals and theory in a single volume. The content is rigorous, yet accessible, to graduate students and researchers who need a state-of-the-art reference on techniques in computational quantum chemistry and methods with polymerization applications. Consolidates more than 10 years of polymerization reaction research that is currently scattered across journal articles Presents the fundamental aspects of Computational Quantum Chemistry Provides researchers with a one-stop source of the latest theoretical developments in polymer science

Computational Quantum Chemistry II The Group Theory Calculator

Computational Quantum Chemistry II   The Group Theory Calculator
Author: Charles M. Quinn,Patrick Fowler,David Redmond
Publsiher: Elsevier
Total Pages: 196
Release: 2010-07-26
ISBN 10: 9780080455204
ISBN 13: 0080455204
Language: EN, FR, DE, ES & NL

Computational Quantum Chemistry II The Group Theory Calculator Book Review:

Modern Computational Quantum Chemistry is indispensable for research in the chemical sciences. Computational Quantum Chemistry II - The Group Theory Calculator describes the group theory that the authors have developed in the past twenty-five years and illustrates how this approach, known as the 'Spherical Shell' method, can be applied to solve a variety of problems that benefit from a group theory analysis. To complement the theory, the book is supplied with a CD-ROM (Windows TM application), on which interactive files, based on EXCEL spreadsheet technology controlled by Visual Basic code, can be used to perform straightforwardly group-theory analyses for direct application to the simplification of physical problems in Chemistry, Physics and even Engineering Science. The Group Theory Calculator Web page is located at http://www.chemistry.nuim.ie/gt_calculator.htm. The primary purpose of this Web page is to identify and resolve any problems encountered while using the MS EXCEL files on the CD-ROM (included with the book). The Web page is maintained by Charles M. Quinn and allows readers to gain updates and news relating to this publication. * A comprehensive description of the authors' revolutionary group theory and structural chemistry methodology * A unique reference/ teaching work together with a CD-ROM filled with powerful interactive files that can be applied to solve group theory problems * Valuable companion for instructors, designers and students * Contains powerful calculators that are simple to use and do not require detailed knowledge for their application

Computational Quantum Mechanics

Computational Quantum Mechanics
Author: Joshua Izaac,Jingbo Wang
Publsiher: Springer
Total Pages: 494
Release: 2019-04-02
ISBN 10: 9783319999296
ISBN 13: 331999929X
Language: EN, FR, DE, ES & NL

Computational Quantum Mechanics Book Review:

Quantum mechanics undergraduate courses mostly focus on systems with known analytical solutions; the finite well, simple Harmonic, and spherical potentials. However, most problems in quantum mechanics cannot be solved analytically. This textbook introduces the numerical techniques required to tackle problems in quantum mechanics, providing numerous examples en route. No programming knowledge is required – an introduction to both Fortran and Python is included, with code examples throughout. With a hands-on approach, numerical techniques covered in this book include differentiation and integration, ordinary and differential equations, linear algebra, and the Fourier transform. By completion of this book, the reader will be armed to solve the Schrödinger equation for arbitrarily complex potentials, and for single and multi-electron systems.

Computational Chemistry

Computational Chemistry
Author: Errol G. Lewars
Publsiher: Springer Science & Business Media
Total Pages: 471
Release: 2007-05-08
ISBN 10: 0306483912
ISBN 13: 9780306483912
Language: EN, FR, DE, ES & NL

Computational Chemistry Book Review:

Computational chemistry has become extremely important in the last decade, being widely used in academic and industrial research. Yet there have been few books designed to teach the subject to nonspecialists. Computational Chemistry: Introduction to the Theory and Applications of Molecular and Quantum Mechanics is an invaluable tool for teaching and researchers alike. The book provides an overview of the field, explains the basic underlying theory at a meaningful level that is not beyond beginners, and it gives numerous comparisons of different methods with one another and with experiment. The following concepts are illustrated and their possibilities and limitations are given: - potential energy surfaces; - simple and extended Hückel methods; - ab initio, AM1 and related semiempirical methods; - density functional theory (DFT). Topics are placed in a historical context, adding interest to them and removing much of their apparently arbitrary aspect. The large number of references, to all significant topics mentioned, should make this book useful not only to undergraduates but also to graduate students and academic and industrial researchers.

Computational Techniques in Quantum Chemistry and Molecular Physics

Computational Techniques in Quantum Chemistry and Molecular Physics
Author: Geerd H.F. Diercksen,B.T. Sutcliffe,A. Veillard
Publsiher: Springer Science & Business Media
Total Pages: 568
Release: 2012-12-06
ISBN 10: 9401018154
ISBN 13: 9789401018159
Language: EN, FR, DE, ES & NL

Computational Techniques in Quantum Chemistry and Molecular Physics Book Review:

This book contains the transcripts of the lectures presented at the NATO Advanced study Institute on "Computational Techniques in Quantum Chemistry and Molecular Physics", held at Ramsau, Germany, 4th - 21st Sept. 1974. Quantum theory was developed in the early decades of this century and was first applied to problems in chemistry and molecular physics as early as 1927. It soon emerged however, that it was impossible to con sider any but the simplest systems in any quantita tive detail because of the complexity of Schrodinger's equation which is the basic equation for chemical and molecular physics applications. This remained the si tuation until the development, after 1950, of elec tronic digital computers. It then became possible to attempt approximate solutions of Schrodinger's equa tion for fairly complicated systems, to yield results which were sufficiently accurate to make comparison with experiment meaningful. Starting in the early nineteen sixties in the United States at a few centres with access to good computers an enormous amount of work went into the development and implementation of schemes for approximate solu tions of Schrodinger's equation, particularly the de velopment of the Hartree-Fock self-consistent-field scheme. But it was soon found that the integrals needed for application of the methods to molecular problems are far from trivial to evaluate and cannot be easily approximated.

Essentials of Computational Chemistry

Essentials of Computational Chemistry
Author: Christopher J. Cramer
Publsiher: John Wiley & Sons
Total Pages: 624
Release: 2013-04-29
ISBN 10: 1118712277
ISBN 13: 9781118712276
Language: EN, FR, DE, ES & NL

Essentials of Computational Chemistry Book Review:

Essentials of Computational Chemistry provides a balanced introduction to this dynamic subject. Suitable for both experimentalists and theorists, a wide range of samples and applications are included drawn from all key areas. The book carefully leads the reader thorough the necessary equations providing information explanations and reasoning where necessary and firmly placing each equation in context.

Computational and Experimental Chemistry

Computational and Experimental Chemistry
Author: Tanmoy Chakraborty,Michael J. Bucknum,Eduardo A. Castro
Publsiher: CRC Press
Total Pages: 355
Release: 2013-09-24
ISBN 10: 1926895290
ISBN 13: 9781926895291
Language: EN, FR, DE, ES & NL

Computational and Experimental Chemistry Book Review:

This book covers a range of new research on computational quantum chemistry, along with a special section devoted to exotic carbon allotropes and spiro quantum theory. The section on spiro quantum theory covers the technical presentation of the ideas surrounding the emergence of a synthetic, analytical, and theoretical spiro quantum chemistry edifice, as well as a chemical topology scheme that successfully describes molecules and patterns, including the hydrocarbons and allotropes of carbon. The second part of the book covers a range of new research on computational quantum chemistry.

Introduction to Computational Chemistry

Introduction to Computational Chemistry
Author: Frank Jensen
Publsiher: John Wiley & Sons
Total Pages: 624
Release: 2013-03-22
ISBN 10: 1118681622
ISBN 13: 9781118681626
Language: EN, FR, DE, ES & NL

Introduction to Computational Chemistry Book Review:

Introduction to Computational Chemistry, Second Edition provides a comprehensive account of the fundamental principles underlying different methods, ranging from classical to the sophisticated. Although comprehensive in its coverage, this textbook focuses on calculating molecular structures and (relative) energies and less on molecular properties or dynamical aspects. No prior knowledge of concepts specific to computational chemistry are assumed, but the reader will need some understanding of introductory quantum mechanics, linear algebra, and vector, differential and integral calculus.

Accurate Condensed Phase Quantum Chemistry

Accurate Condensed Phase Quantum Chemistry
Author: Fred Manby
Publsiher: CRC Press
Total Pages: 220
Release: 2010-08-02
ISBN 10: 9781439808375
ISBN 13: 1439808376
Language: EN, FR, DE, ES & NL

Accurate Condensed Phase Quantum Chemistry Book Review:

The theoretical methods of quantum chemistry have matured to the point that accurate predictions can be made and experiments can be understood for a wide range of important gas-phase phenomena. A large part of this success can be attributed to the maturation of hierarchies of approximation, which allow one to approach very high accuracy, provided that sufficient computational resources are available. Until recently, these hierarchies have not been available in condensed-phase chemistry, but recent advances in the field have now led to a group of methods that are capable of reaching this goal. Accurate Condensed-Phase Quantum Chemistry addresses these new methods and the problems to which they can be applied. The book begins with an overview of periodic treatments of electron correlation, with an emphasis on the algorithmic features responsible for their computational efficiency. The first section of the book: Describes the Laplace-transform approach to periodic second-order perturbation theory (MP2) Examines local and density fitted schemes for MP2 in crystalline systems Presents test calculations for a variety of systems with small and medium-sized unit cells The next section focuses on methods based on treatment of the periodic solid in terms of fragments. This part of the book: Explores the incremental many-body scheme for electron correlation in solids, and describes progress towards metals and molecules on surfaces Describes the hierarchical method as an alternative fragment-based approach to electron correlation in crystalline solids, using conventional molecular electronic structure methods Examines electrostatically embedded many-body expansion for large systems, with an emphasis on molecular clusters and molecular liquids Explores delocalized and localized orbital approaches to the electronic structures of periodic and non-periodic solids Lastly, the book describes a practical method by which conventional molecular electronic structure theory can be applied to molecular liquids and solids. Along with the methodology, it presents results on small to medium water clusters as well as on liquid water.

Theoretical and Quantum Chemistry at the Dawn of the 21st Century

Theoretical and Quantum Chemistry at the Dawn of the 21st Century
Author: Tanmoy Chakraborty,Ramon Carbo-Dorca
Publsiher: CRC Press
Total Pages: 696
Release: 2018-06-19
ISBN 10: 1351170945
ISBN 13: 9781351170949
Language: EN, FR, DE, ES & NL

Theoretical and Quantum Chemistry at the Dawn of the 21st Century Book Review:

This volume, edited by a well-known specialist in the field of theoretical chemistry, gathers together a selection of papers on theoretical chemistry within the themes of mathematical, computational, and quantum chemistry. The authors present a rich assembly of some of the most important current research in the field of quantum chemistry in modern times. In Quantum Chemistry at the Dawn of the 21st Century, the editors aim to replicate the tradition of the fruitful Girona Workshops and Seminars, held at the University of Girona, Italy, annually for many years, which offered important scientific gatherings focusing on quantum chemistry. This volume, like the workshops, showcases a large variety of quantum chemical contributions from different points of view from some of the leading scientists in the field today. This unique volume does not pretend to provide a complete overview of quantum chemistry, but it does provide a broad set of contributions by some of the leading scientists on the field, under the expert editorship of two leaders in the field.

Computational Chemistry

Computational Chemistry
Author: Errol G. Lewars
Publsiher: Springer Science & Business Media
Total Pages: 664
Release: 2010-11-09
ISBN 10: 9048138620
ISBN 13: 9789048138623
Language: EN, FR, DE, ES & NL

Computational Chemistry Book Review:

This corrected second edition contains new material which includes solvent effects, the treatment of singlet diradicals, and the fundamentals of computaional chemistry. "Computational Chemistry: Introduction to the Theory and Applications of Molecular and Quantum Mechanics" is an invaluable tool for teaching and researchers alike. The book provides an overview of the field, explains the basic underlying theory at a meaningful level that is not beyond beginners, and it gives numerous comparisons of different methods with one another and with experiment. The following concepts are illustrated and their possibilities and limitations are given: - potential energy surfaces; - simple and extended Hueckel methods; - ab initio, AM1 and related semiempirical methods; - density functional theory (DFT). Topics are placed in a historical context, adding interest to them and removing much of their apparently arbitrary aspect. The large number of references, to all significant topics mentioned, should make this book useful not only to undergraduates but also to graduate students and academic and industrial researchers.

Computational Quantum Chemistry

Computational Quantum Chemistry
Author: Ram Yatan Prasad,Pranita
Publsiher: CRC Press
Total Pages: 691
Release: 2021-03-11
ISBN 10: 1000344754
ISBN 13: 9781000344752
Language: EN, FR, DE, ES & NL

Computational Quantum Chemistry Book Review:

Computational Quantum Chemistry, Second Edition, is an extremely useful tool for teaching and research alike. It stipulates information in an accessible manner for scientific investigators, researchers and entrepreneurs. The book supplies an overview of the field and explains the fundamental underlying principles. It also gives the knowledge of numerous comparisons of different methods. The book consists of a wider range of applications in each chapter. It also provides a number of references which will be useful for academic and industrial researchers. It includes a large number of worked-out examples and unsolved problems for enhancing the computational skill of the users. Features Includes comprehensive coverage of most essential basic concepts Achieves greater clarity with improved planning of topics and is reader-friendly Deals with the mathematical techniques which will help readers to more efficient problem solving Explains a structured approach for mathematical derivations A reference book for academicians and scientific investigators Ram Yatan Prasad, PhD, DSc (India), DSc (hc) Colombo, is a Professor of Chemistry and former Vice Chancellor of S.K.M University, Jharkhand, India. Pranita, PhD, DSc (hc) Sri Lanka, FICS, is an Assistant Professor of Chemistry at Vinoba Bhave University, India.

Advances in Quantum Chemistry

Advances in Quantum Chemistry
Author: Anonim
Publsiher: Academic Press
Total Pages: 370
Release: 1997-03-20
ISBN 10: 0080582532
ISBN 13: 9780080582535
Language: EN, FR, DE, ES & NL

Advances in Quantum Chemistry Book Review:

Advances in Quantum Chemistry publishes surveys of current developments in the rapidly developing field of quantum chemistry--a field that falls between the historically established areas of mathematics, physics,chemistry, and biology. With invited reviews written by leading international researchers, each presenting new results, this quality serial provides a single vehicle for following progress in this interdisciplinary area. "Volume 28 collects papers written in honor of Geerd H.F. Diercksen. Diercksen is a pioneer in the field of quantum mechanics whose research includes studies of the structure and stability of hydrogen-bonded and Van der Waals dimers and small clusters, thevibrational and rotational spectra of diatomic and triatomic molecules, on static electric properties in solutions and of molecules absorbed on surfaces. His results are essential in molecular and atomic physics, in astrophysics, and in biochemistry.

Computational Organic Chemistry

Computational Organic Chemistry
Author: Steven M. Bachrach
Publsiher: John Wiley & Sons
Total Pages: 632
Release: 2014-03-03
ISBN 10: 1118671228
ISBN 13: 9781118671221
Language: EN, FR, DE, ES & NL

Computational Organic Chemistry Book Review:

The Second Edition demonstrates how computational chemistry continues to shed new light on organic chemistry The Second Edition of author Steven Bachrach’s highly acclaimed Computational Organic Chemistry reflects the tremendous advances in computational methods since the publication of the First Edition, explaining how these advances have shaped our current understanding of organic chemistry. Readers familiar with the First Edition will discover new and revised material in all chapters, including new case studies and examples. There’s also a new chapter dedicated to computational enzymology that demonstrates how principles of quantum mechanics applied to organic reactions can be extended to biological systems. Computational Organic Chemistry covers a broad range of problems and challenges in organic chemistry where computational chemistry has played a significant role in developing new theories or where it has provided additional evidence to support experimentally derived insights. Readers do not have to be experts in quantum mechanics. The first chapter of the book introduces all of the major theoretical concepts and definitions of quantum mechanics followed by a chapter dedicated to computed spectral properties and structure identification. Next, the book covers: Fundamentals of organic chemistry Pericyclic reactions Diradicals and carbenes Organic reactions of anions Solution-phase organic chemistry Organic reaction dynamics The final chapter offers new computational approaches to understand enzymes. The book features interviews with preeminent computational chemists, underscoring the role of collaboration in developing new science. Three of these interviews are new to this edition. Readers interested in exploring individual topics in greater depth should turn to the book’s ancillary website www.comporgchem.com, which offers updates and supporting information. Plus, every cited article that is available in electronic form is listed with a link to the article.

Theory and Applications of Computational Chemistry

Theory and Applications of Computational Chemistry
Author: Clifford Dykstra,Gernot Frenking,Kwang Kim,Gustavo Scuseria
Publsiher: Elsevier
Total Pages: 1336
Release: 2011-10-13
ISBN 10: 0080456243
ISBN 13: 9780080456249
Language: EN, FR, DE, ES & NL

Theory and Applications of Computational Chemistry Book Review:

Computational chemistry is a means of applying theoretical ideas using computers and a set of techniques for investigating chemical problems within which common questions vary from molecular geometry to the physical properties of substances. Theory and Applications of Computational Chemistry: The First Forty Years is a collection of articles on the emergence of computational chemistry. It shows the enormous breadth of theoretical and computational chemistry today and establishes how theory and computation have become increasingly linked as methodologies and technologies have advanced. Written by the pioneers in the field, the book presents historical perspectives and insights into the subject, and addresses new and current methods, as well as problems and applications in theoretical and computational chemistry. Easy to read and packed with personal insights, technical and classical information, this book provides the perfect introduction for graduate students beginning research in this area. It also provides very readable and useful reviews for theoretical chemists. * Written by well-known leading experts * Combines history, personal accounts, and theory to explain much of the field of theoretical and compuational chemistry * Is the perfect introduction to the field

New Methods in Computational Quantum Mechanics

New Methods in Computational Quantum Mechanics
Author: Ilya Prigogine,Stuart A. Rice
Publsiher: John Wiley & Sons
Total Pages: 812
Release: 2009-09-09
ISBN 10: 0470142057
ISBN 13: 9780470142059
Language: EN, FR, DE, ES & NL

New Methods in Computational Quantum Mechanics Book Review:

The use of quantum chemistry for the quantitative prediction of molecular properties has long been frustrated by the technical difficulty of carrying out the needed computations. In the last decade there have been substantial advances in the formalism and computer hardware needed to carry out accurate calculations of molecular properties efficiently. These advances have been sufficient to make quantum chemical calculations a reliable tool for the quantitative interpretation of chemical phenomena and a guide to laboratory experiments. However, the success of these recent developments in computational quantum chemistry is not well known outside the community of practitioners. In order to make the larger community of chemical physicists aware of the current state of the subject, this self-contained volume of Advances in Chemical Physics surveys a number of the recent accomplishments in computational quantum chemistry. This stand-alone work presents the cutting edge of research in computational quantum mechanics. Supplemented with more than 150 illustrations, it provides evaluations of a broad range of methods, including: * Quantum Monte Carlo methods in chemistry * Monte Carlo methods for real-time path integration * The Redfield equation in condensed-phase quantum dynamics * Path-integral centroid methods in quantum statistical mechanics and dynamics * Multiconfigurational perturbation theory-applications in electronic spectroscopy * Electronic structure calculations for molecules containing transition metals * And more Contributors to New Methods in Computational Quantum Mechanics KERSTIN ANDERSSON, Department of Theoretical Chemistry, Chemical Center, Sweden DAVID M. CEPERLEY, National Center for Supercomputing Applications and Department of Physics, University of Illinois at Urbana-Champaign, Illinois MICHAEL A. COLLINS, Research School of Chemistry, Australian National University, Canberra, Australia REINHOLD EGGER, Fakultät für Physik, Universität Freiburg, Freiburg, Germany ANTHONY K. FELTS, Department of Chemistry, Columbia University, New York RICHARD A. FRIESNER, Department of Chemistry, Columbia University, New York MARKUS P. FÜLSCHER, Department of Theoretical Chemistry, Chemical Center, Sweden K. M. HO, Ames Laboratory and Department of Physics, Iowa State University, Ames, Iowa C. H. MAK, Department of Chemistry, University of Southern California, Los Angeles, California PER-ÅKE Malmqvist, Department of Theoretical Chemistry, Chemical Center, Sweden MANUELA MERCHán, Departamento de Química Física, Universitat de Valéncia, Spain LUBOS MITAS, National Center for Supercomputing Applications and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Illinois STEFANO OSS, Dipartimento di Fisica, Università di Trento and Istituto Nazionale di Fisica della Materia, Unità di Trento, Italy KRISTINE PIERLOOT, Department of Chemistry, University of Leuven, Belgium W. THOMAS POLLARD, Department of Chemistry, Columbia University, New York BJÖRN O. ROOS, Department of Theoretical Chemistry, Chemical Center, Sweden LUIS SERRANO-ANDRÉS, Department of Theoretical Chemistry, Chemical Center, Sweden PER E. M. SIEGBAHN, Department of Physics, University of Stockholm, Stockholm, Sweden WALTER THIEL, Institut für Organische Chemie, Universität Zürich, Zürich, Switzerland GREGORY A. VOTH, Department of Chemistry, University of Pennsylvania, Pennsylvania C. Z. Wang, Ames Laboratory and Department of Physi