4 recherche sur le tag 'valence'   

Oxidation numbers and oxidation states / Christian K. Jorgensen

Public ISBD Titre : Oxidation numbers and oxidation states Type de document : texte imprimé Auteurs : Christian K. Jorgensen Editeur : Berlin, Heidelberg : Springer Verlag Année de publication : 1969 Importance : 291 p. ISBN/ISSN/EAN : 978-3-642-87760-5 Langues : Anglais (eng) Catégories : Généralités en Chimie Tags : THEORETICAL CHEMISTRY  VALENCE Index. décimale : B-A Résumé : "The correlation of spectroscopic and chemical investigations in recent years has been highly beneficial of many reasons. Around 1950, no valid explanation was available of the colours of compounds of the five tran­sition groups. Later, it was possible to identify the excited levels with those expected for an electron configuration with a definite number of electrons in the partly filled shell. It is not generally recognized that this is equivalent to determining spectroscopic oxidation states related to the preponderant electron configuration and not to estimates of the fractional atomic charges. This brings in an entirely different type of description than the formal oxidation numbers used for characterizing compounds and reaction schemes. However, it must be realized that collectively oxidized ligands, formation of cluster-complexes and catenation may prevent the oxidation state from being well-defined." Cote : B-A053 Num_Inv : 00055 Localisation : LCC (SdS) Oxidation numbers and oxidation states [texte imprimé] / Christian K. Jorgensen . - Berlin, Heidelberg : Springer Verlag, 1969 . - 291 p. ISBN : 978-3-642-87760-5 Langues : Anglais (eng) Catégories : Généralités en Chimie Tags : THEORETICAL CHEMISTRY  VALENCE Index. décimale : B-A Résumé : "The correlation of spectroscopic and chemical investigations in recent years has been highly beneficial of many reasons. Around 1950, no valid explanation was available of the colours of compounds of the five tran­sition groups. Later, it was possible to identify the excited levels with those expected for an electron configuration with a definite number of electrons in the partly filled shell. It is not generally recognized that this is equivalent to determining spectroscopic oxidation states related to the preponderant electron configuration and not to estimates of the fractional atomic charges. This brings in an entirely different type of description than the formal oxidation numbers used for characterizing compounds and reaction schemes. However, it must be realized that collectively oxidized ligands, formation of cluster-complexes and catenation may prevent the oxidation state from being well-defined." Cote : B-A053 Num_Inv : 00055 Localisation : LCC (SdS)

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
00055	B-A053	Texte imprimé	Bibliothèque	Livre	Disponible
00056	B-A053	Texte imprimé	Bibliothèque	Livre	Disponible

Valence theory / John N. Murrell

Public ISBD Titre : Valence theory Type de document : texte imprimé Auteurs : John N. Murrell ; S.F.A. Kettle ; J.M. Tedder Editeur : New York : John Wiley & Sons Année de publication : 1965 Importance : 401 p. Langues : Anglais (eng) Catégories : Chimie théorique Tags : CHEMISTRY-Physical and Theoretical  VALENCE Index. décimale : B-H Résumé : "The book has been based on lectures given for the past four years at the University of Sheffield. Our experience has been that the student only obtains a full grasp of the subject when he has successfully tackled some problems, and we consider that the problems in this book are an essential part of the text; some of the problems provide proofs of statements made in the text. A student benefits most if he is given the minimum of help necessary to enable him to solve the problem. To take a step in this direction we have provided hints to the problems at the end of the book. The student should first try the problems without the hints, but with their help most students should be able to obtain the solutions. The first five chapters are intended for first year students, since we feel that an early grasp of such concepts as the orbital and the electron-pair bond are necessary for any course in experimental chemistry. The more formal mathematical aspects of the book start in chapter 6 when it has been assumed that the student has received some mathematical training during his first year. These later chapters also assume a knowledge of other branches of chemistry." Authors' preface Cote : B-H042 (SdS) Num_Inv : 419 Valence theory [texte imprimé] / John N. Murrell ; S.F.A. Kettle ; J.M. Tedder . - New York : John Wiley & Sons, 1965 . - 401 p. Langues : Anglais (eng) Catégories : Chimie théorique Tags : CHEMISTRY-Physical and Theoretical  VALENCE Index. décimale : B-H Résumé : "The book has been based on lectures given for the past four years at the University of Sheffield. Our experience has been that the student only obtains a full grasp of the subject when he has successfully tackled some problems, and we consider that the problems in this book are an essential part of the text; some of the problems provide proofs of statements made in the text. A student benefits most if he is given the minimum of help necessary to enable him to solve the problem. To take a step in this direction we have provided hints to the problems at the end of the book. The student should first try the problems without the hints, but with their help most students should be able to obtain the solutions. The first five chapters are intended for first year students, since we feel that an early grasp of such concepts as the orbital and the electron-pair bond are necessary for any course in experimental chemistry. The more formal mathematical aspects of the book start in chapter 6 when it has been assumed that the student has received some mathematical training during his first year. These later chapters also assume a knowledge of other branches of chemistry." Authors' preface Cote : B-H042 (SdS) Num_Inv : 419

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
419	B-H042	Texte imprimé	Bibliothèque	Livre	Disponible

Valence theory / John N. Murrell

Public ISBD Titre : Valence theory Type de document : texte imprimé Auteurs : John N. Murrell ; S.F.A. Kettle ; J.M. Tedder Editeur : New York : John Wiley & Sons Année de publication : 1965 Importance : xiii, 401 p. Langues : Anglais (eng) Tags : VALENCE Index. décimale : B-S Ancien fonds Résumé : "The book has been based on lectures given for the past four years at the University of Sheffield. Our experience has been that the student only obtains a full grasp of the subject when he has successfully tackled some problems, and we consider that the problems in this book are an essential part of the text; some of the problems provide proofs of statements made in the text. A student benefits most if he is given the minimum of help necessary to enable him to solve the problem. To take a step in this direction we have provided hints to the problems at the end of the book. The student should first try the problems without the hints, but with their help most students should be able to obtain the solutions. The first five chapters are intended for first year students, since we feel that an early grasp of such concepts as the orbital and the electron-pair bond are necessary for any course in experimental chemistry. The more formal mathematical aspects of the book start in chapter 6 when it has been assumed that the student has received some mathematical training during his first year. These later chapters also assume a knowledge of other branches of chemistry." Authors' preface Cote : B-S064 Num_Inv : 690 Localisation : LCC (SdS) Valence theory [texte imprimé] / John N. Murrell ; S.F.A. Kettle ; J.M. Tedder . - New York : John Wiley & Sons, 1965 . - xiii, 401 p. Langues : Anglais (eng) Tags : VALENCE Index. décimale : B-S Ancien fonds Résumé : "The book has been based on lectures given for the past four years at the University of Sheffield. Our experience has been that the student only obtains a full grasp of the subject when he has successfully tackled some problems, and we consider that the problems in this book are an essential part of the text; some of the problems provide proofs of statements made in the text. A student benefits most if he is given the minimum of help necessary to enable him to solve the problem. To take a step in this direction we have provided hints to the problems at the end of the book. The student should first try the problems without the hints, but with their help most students should be able to obtain the solutions. The first five chapters are intended for first year students, since we feel that an early grasp of such concepts as the orbital and the electron-pair bond are necessary for any course in experimental chemistry. The more formal mathematical aspects of the book start in chapter 6 when it has been assumed that the student has received some mathematical training during his first year. These later chapters also assume a knowledge of other branches of chemistry." Authors' preface Cote : B-S064 Num_Inv : 690 Localisation : LCC (SdS)

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
690	B-S064	Texte imprimé	Bibliothèque	Livre	Disponible

Valency and bonding / Frank Weinhold

Public ISBD Titre : Valency and bonding : A natural bond orbital donor-acceptor perspective Type de document : texte imprimé Auteurs : Frank Weinhold ; Clark R. Landis Editeur : Cambridge : Cambridge University Press Année de publication : 2005 Importance : ix, 749 p. Format : 26 cm. ISBN/ISSN/EAN : 978-0-521-83128-4 Langues : Anglais (eng) Tags : CHEMICAL BONDS  MOLECULAR STRUCTURE  VALENCE Index. décimale : EQ -Equipe- Résumé : "This textbook develops the foundations of Lewis- and Pauling-like localized structural and hybridization concepts to present the first modernized overview of chemical valency and bonding theory. Directly based on current computational technology, it serves as both a general textbook exposition of modern Lewis, hybridization, and resonance concepts and a comprehensive compilation of NBO-based bonding descriptors--for prototype molecular and supramolecular organic and inorganic species. * Presents the first modernized overview of chemical valency and bonding theory * Authors are leaders in the field * Hundreds of examples for independent reader investigation using computational and analysis tools." Cote : LCC/O Num_Inv : 2959 Valency and bonding : A natural bond orbital donor-acceptor perspective [texte imprimé] / Frank Weinhold ; Clark R. Landis . - Cambridge : Cambridge University Press, 2005 . - ix, 749 p. ; 26 cm. ISBN : 978-0-521-83128-4 Langues : Anglais (eng) Tags : CHEMICAL BONDS  MOLECULAR STRUCTURE  VALENCE Index. décimale : EQ -Equipe- Résumé : "This textbook develops the foundations of Lewis- and Pauling-like localized structural and hybridization concepts to present the first modernized overview of chemical valency and bonding theory. Directly based on current computational technology, it serves as both a general textbook exposition of modern Lewis, hybridization, and resonance concepts and a comprehensive compilation of NBO-based bonding descriptors--for prototype molecular and supramolecular organic and inorganic species. * Presents the first modernized overview of chemical valency and bonding theory * Authors are leaders in the field * Hundreds of examples for independent reader investigation using computational and analysis tools." Cote : LCC/O Num_Inv : 2959

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
2959	LCC/O	Texte imprimé	Equipe	Livre	Equipe - Demande préalable Disponible