Author: Morris KraussPublisher:
ISBN:
Category : Molecules
Languages : en
Pages : 156
Book Description
Compendium of Ab Initio Calculations of Molecular Energies and Properties
Author: Morris KraussPublisher:
ISBN:
Category : Molecules
Languages : en
Pages : 156
Book Description
Compendium of AB Initio Calculations of Molecular Energies and Properties (Classic Reprint)
Author: Morris KraussPublisher: Forgotten Books
ISBN: 9780266936022
Category :
Languages : en
Pages : 160
Book Description
Excerpt from Compendium of Ab Initio Calculations of Molecular Energies and Properties Lioh, php C3, ocn fcn, scn clcn, coz befz, sco, N liéo Non-linear triatomic foh, noe, 03, o bhe, ghz, nhée hzo, s Linear tetratomics, D h czh2'czn2 Linear tetratomics, qbv licch, fcch, clcch Beflg, bh3, ch3, ch; nh3, ph3 ahq bh%, 0114 Energy and Properties as a Function of the Internuclear Distance Introduction lif-a licl Beo BF naf nacl mgo alf $10? PN cao Sro. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Compendium of Ab Initio Calculations of Molecular Energies and Properties
Author: Morris KraussPublisher:
ISBN:
Category :
Languages : en
Pages : 139
Book Description
The number of ab initio molecular electronic calculations has increased dramatically in the last few years. Both the practitioners and other interested students of the results of the calculations have found it increasingly difficult to determine the present status of these calculations. This compendium references the work from 1960 to the present and abstracts from the mass of data the best values for several observable properties including the total energy, dissociation energy, electron affinity, spectroscopic constants, electric moments, field gradients, polarizabilities, and magnetic constants. In order to provide an insight into molecular electronic structure tables of orbital energies are also included. These tables are meant to direct attention to the successes and failures of the calculations by compiling a large percentage of the best results in a reasonably compact form. Its usefulness will be limited in time by rapid advance in the field. (Author).
AB Initio Calculation of the Structures and Properties of Molecules
Author: Clifford E. DykstraPublisher: Elsevier Publishing Company
ISBN:
Category : Science
Languages : en
Pages : 296
Book Description
This book is intended as a guide to the ab initio calculation of molecular structure and properties. It provides the necessary working information to enable the non-specialist to use and understand electronic structure methods and related computing technology, despite the high level of sophistication of quantum chemical methods. The initial chapters define and outline theoretical concepts, methods and computational approaches. Descriptive information and definitions of the terminology are given first; more detailed and mathematical explanations follow. These first chapters thus provide the background information needed to use the extensive literature of ab initio electronic structure theory. The next chapter first provides an overview of the technical issues relating to molecular properties, and then gives a rather detailed but general development. The latter part of this chapter is mainly intended for those first encountering the methodologies of properties determination and intending to pursue further developments. The other chapters provide reviews of calculations in the literature and assessments of factors influencing accuracy. The book is particularly useful to those who need a working understanding of ab initio calculations and well-suited to graduate students and researchers in computational and theoretical chemistry, researchers in electronic structure, spectroscopists and organic chemists.
Diatomic Molecules
Author: Robert MullikenPublisher: Elsevier
ISBN: 0323160077
Category : Science
Languages : en
Pages : 214
Book Description
Diatomic Molecules: Results of Ab Initio Calculations provides the results obtained from quantum-mechanical calculations on the electronic structure of diatomic molecules. This six-chapter text also discusses the related concepts of ab initio calculation methods. This book considers first the primary methods used in the computation of molecular wave functions and of related properties. This topic is followed by discussions on the linear combination of atomic orbital and linear combination of mixed atomic orbital approximations and basis sets; electronic population analysis; spectroscopic transition probabilities; and the nature of chemical bonding. The remaining chapters examine the features of various theories that become prominent when two or more electrons are present, or are important in hydrides or homopolar and heteropolar molecules. This text will be of great value to organic and inorganic chemists and physicists.
NBS Technical Note
Author: Quantum-Mechanical Ab-initio Calculation of the Properties of Crystalline Materials
Author: Cesare PisaniPublisher: Springer Science & Business Media
ISBN: 3642614787
Category : Science
Languages : en
Pages : 331
Book Description
A number of general-purpose, reasonably accurate and well-tested ab-initio codes for crystals are discussed in this book. The aim is to expand competence of their application in material sciences and solid-state physics. The book addresses particularly readers with a general knowledge in quantum chemistry and intends to give a deeper insight into the special algorithms and computational techniques in ab-initio computer codes for crystals. Three different programs which are available to all interested potential users on request are presented.
Ab Initio Calculations
Author: Petr CarskyPublisher: Springer Science & Business Media
ISBN: 3642931405
Category : Science
Languages : en
Pages : 256
Book Description
Until recently quantum chemical ab initio calculations were re stricted to atoms and very small molecules. As late as in 1960 Allen l and Karo stated : "Almost all of our ab initio experience derives from diatomic LCAO calculations ••• N and we have found in the litera ture "approximately eighty calculations, three-fourths of which are for diatomic molecules ••• There are approximately twenty ab initio calculations for molecules with more than two atoms, but there is a decided dividing line between the existing diatomic and polyatomic wave functions. Confidence in the satisfactory evaluation of the many -center two-electron integrals is very much less than for the diatom ic case". Among the noted twenty calculations, SiH was the largest 4 molecule treated. In most cases a minimal basis set was used and the many-center two-electron integrals were calculated in an approximate way. Under these circumstances the ab initio calculations could hard ly provide useful chemical information. It is therefore no wonder that the dominating role in the field of chemical applications was played by semiempirical and empirical methods. The situation changed essentially in the next decade. The problem of many-center integrals was solved, efficient and sophisticated computer programs were devel oped, basis sets suitable for a given type of problem were suggested, and, meanwhile, a considerable amount of results has been accumulated which serve as a valuable comparative material. The progress was of course inseparable from the development and availability of computers.
Ab Initio Determination of Molecular Properties,
Author: Alan HinchliffePublisher: CRC Press
ISBN:
Category : Art
Languages : en
Pages : 184
Book Description
Computational quantum chemistry was born in the mid 1960s, and had by the early 1980s achieved considerable status as a structural tool within chemistry. The field has now developed to the point where it has its own journals. However, a major change is taking place in that most consumers of computational quantum chemistry are now experimentalists, who want answers to questions of the type "What if.....?" This change has come about because of the dramatic fall in computer hardware costs, the ready availability of large molecular structure packages and the international collaboration between quantum chemists on a scale rarely witnessed in science. This book aims to show what can be done by computational chemistry, and what kind of reliance might be placed on the predictions. The vast majority of investigations are made at the 'ab initio self consistent field' level, and the results of such calculations occupy a prominent role in this book. However, the user has to be aware of the limitations of this model, and the effects upon electron correlation, etc are discussed. Anyone who is contemplating making use of the techniques of computational quantum chemistry to rationalise or predict chemical behaviour will find this unique book of tremendous use.
Author: Danylo Kats