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Author: Karine Costuas
Publisher:
ISBN:
Category :
Languages : fr
Pages : 205
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Book Description
CE MEMOIRE RAPPORTE L'ETUDE DE COMPOSES ORGANOMETALLIQUES AYANT DES STRUCTURES MOLECULAIRES ORIGINALES OU DES PROPRIETES PHYSIQUES INTERESSANTES. L'INTRODUCTION GENERALE RAPPELLE BRIEVEMENT LES REGLES DE STABILITE GENERALE CONCERNANT LES COMPLEXES DE METAUX DE TRANSITION (REGLE DES 18 ELECTRONS) AINSI QUE CELLES RELATIVES AUX CLUSTERS POLYNUCLEAIRES ORGANOMETALLIQUES (REGLES WADE-MINGOS OU THEORIE PSEP). LA PREMIERE PARTIE DE CETTE THESE DECRIT DIFFERENTES ETUDES AYANT TRAIT A DES COMPLEXES MONOMETALLIQUES. L'ETUDE THEORIQUE DU PSEUDO-COMPLEXE A 20 ELECTRONS TI( 8-PENTALENE) 2 A DEMONTRE QUE CELUI-CI NE CONSTITUE PAS UNE EXCEPTION A LA REGLE DES 18 ELECTRONS. LE DEUXIEME CHAPITRE PERMET DE RATIONALISER LA GEOMETRIE ET L'ETAT DE SPIN DE COMPLEXES CONTENANT LE MOTIF CP*FE(DPPE) (CP = 5C 5H 5, DPE = 5H 2PCH 2CH 2PH 2) ET DE COMPOSES APPARENTES, DEFICIENTS EN ELECTRON ET/OU PARAMAGNETIQUES. ENFIN DANS LE TROISIEME CHAPITRE, UNE ETUDE THEORIQUE RELIEE A UNE ETUDE ELECTROCHIMIQUE DES COMPOSES FECP*(DPPE)X 0 / + (X = F, CL, BR, I, CH 3, H) EXPOSE UNE ANALYSE COMPLETE ET DETAILLEE DU MODE DE LA LIAISON FE-X EN FONCTION DE LA NATURE DE X, DANS LA SERIE DE COMPLEXES ETUDIEE. LA DEUXIEME PARTIE CONCERNE UNE SERIE DE FILS MOLECULAIRES POLYMETALLIQUES CONSTITUES DE 2 OU 3 FRAGMENTS METALLIQUES (FECP*(DPPE), RUCP(PPH 3) 2) RELIES PAR UN PONT ORGANIQUE (POLYYNE, ETHYNYL-BENZENE, ALKYLE, -S(CH 2) 2S-). LA DETERMINATION STRUCTURALE (RX) DE TELS COMPLEXES ETANT DIFFICILE, LA GEOMETRIE DES PREMIERS ETATS D'OXYDATION EN FONCTION DE L'ETAT DE SPIN A ETE DETERMINEE PAR OPTIMISATION EN METHODE DFT. LEUR STABILITE RELATIVE EST DISCUTEE. LES COUPLAGES ELECTRONIQUES ET MAGNETIQUES DANS CES COMPLEXES SONT EGALEMENT ETUDIES. LA TROISIEME PARTIE CONCERNE L'INTERPRETATION DE LA STABILITE DE CLUSTERS DE METAUX DE TRANSITION PRESENTANT UNE STRUCTURE ET/OU UN COMPTE ELECTRONIQUE INHABITUELS : (I) LES CLUSTERS TRIANGULAIRE DE TYPE M 3L N A 50 ELECTRONS DE VALENCE METALLIQUES. (II) LE CLUSTER RU 3(H)( 3PPHCH 2PPH 2)( 3PHC 2BU T) (CO) 6 QUI PRESENTE UNE STRUCTURE DIFFERENTE DE LA BIPYRAMIDE A BASE TRIANGULAIRE CLOSO ATTENDUE. UNE ETUDE THEORIQUE GENERALE NOUS A PERMIS D'INTERPRETER CES DEUX EXCEPTIONS.
Author: Karine Costuas
Publisher:
ISBN:
Category :
Languages : fr
Pages : 205
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Book Description
CE MEMOIRE RAPPORTE L'ETUDE DE COMPOSES ORGANOMETALLIQUES AYANT DES STRUCTURES MOLECULAIRES ORIGINALES OU DES PROPRIETES PHYSIQUES INTERESSANTES. L'INTRODUCTION GENERALE RAPPELLE BRIEVEMENT LES REGLES DE STABILITE GENERALE CONCERNANT LES COMPLEXES DE METAUX DE TRANSITION (REGLE DES 18 ELECTRONS) AINSI QUE CELLES RELATIVES AUX CLUSTERS POLYNUCLEAIRES ORGANOMETALLIQUES (REGLES WADE-MINGOS OU THEORIE PSEP). LA PREMIERE PARTIE DE CETTE THESE DECRIT DIFFERENTES ETUDES AYANT TRAIT A DES COMPLEXES MONOMETALLIQUES. L'ETUDE THEORIQUE DU PSEUDO-COMPLEXE A 20 ELECTRONS TI( 8-PENTALENE) 2 A DEMONTRE QUE CELUI-CI NE CONSTITUE PAS UNE EXCEPTION A LA REGLE DES 18 ELECTRONS. LE DEUXIEME CHAPITRE PERMET DE RATIONALISER LA GEOMETRIE ET L'ETAT DE SPIN DE COMPLEXES CONTENANT LE MOTIF CP*FE(DPPE) (CP = 5C 5H 5, DPE = 5H 2PCH 2CH 2PH 2) ET DE COMPOSES APPARENTES, DEFICIENTS EN ELECTRON ET/OU PARAMAGNETIQUES. ENFIN DANS LE TROISIEME CHAPITRE, UNE ETUDE THEORIQUE RELIEE A UNE ETUDE ELECTROCHIMIQUE DES COMPOSES FECP*(DPPE)X 0 / + (X = F, CL, BR, I, CH 3, H) EXPOSE UNE ANALYSE COMPLETE ET DETAILLEE DU MODE DE LA LIAISON FE-X EN FONCTION DE LA NATURE DE X, DANS LA SERIE DE COMPLEXES ETUDIEE. LA DEUXIEME PARTIE CONCERNE UNE SERIE DE FILS MOLECULAIRES POLYMETALLIQUES CONSTITUES DE 2 OU 3 FRAGMENTS METALLIQUES (FECP*(DPPE), RUCP(PPH 3) 2) RELIES PAR UN PONT ORGANIQUE (POLYYNE, ETHYNYL-BENZENE, ALKYLE, -S(CH 2) 2S-). LA DETERMINATION STRUCTURALE (RX) DE TELS COMPLEXES ETANT DIFFICILE, LA GEOMETRIE DES PREMIERS ETATS D'OXYDATION EN FONCTION DE L'ETAT DE SPIN A ETE DETERMINEE PAR OPTIMISATION EN METHODE DFT. LEUR STABILITE RELATIVE EST DISCUTEE. LES COUPLAGES ELECTRONIQUES ET MAGNETIQUES DANS CES COMPLEXES SONT EGALEMENT ETUDIES. LA TROISIEME PARTIE CONCERNE L'INTERPRETATION DE LA STABILITE DE CLUSTERS DE METAUX DE TRANSITION PRESENTANT UNE STRUCTURE ET/OU UN COMPTE ELECTRONIQUE INHABITUELS : (I) LES CLUSTERS TRIANGULAIRE DE TYPE M 3L N A 50 ELECTRONS DE VALENCE METALLIQUES. (II) LE CLUSTER RU 3(H)( 3PPHCH 2PPH 2)( 3PHC 2BU T) (CO) 6 QUI PRESENTE UNE STRUCTURE DIFFERENTE DE LA BIPYRAMIDE A BASE TRIANGULAIRE CLOSO ATTENDUE. UNE ETUDE THEORIQUE GENERALE NOUS A PERMIS D'INTERPRETER CES DEUX EXCEPTIONS.
Author: Christian Bruneau
Publisher: Springer Science & Business Media
ISBN: 9783540205432
Category : Science
Languages : en
Pages : 368
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Book Description
With contributions by numerous experts
Author: Valerian Dragutan
Publisher: Springer Science & Business Media
ISBN: 9048134315
Category : Science
Languages : en
Pages : 432
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Book Description
An outstanding international scientific event in the field of metathesis chemistry, the NATO ASI "Green Metathesis Chemistry: Great Challenges in Synthesis, Catalysis and Nanotechnology" has been recently organized in Bucharest, Romania (July 21- August 2, 2008). Numerous renowned scientists, young researchers and students, convened for two weeks to present and debate on the newest trends in alkene metathesis and identify future perspectives in this fascinating area of organic, organometallic, catalysis and polymer chemistry with foreseen important applications in materials science and technology. Following the fruitful practice of NATO Advanced Study Institutes, selected contributions covering plenary lectures, short communications and posters have been compiled in this special volume dedicated to this successful convention on green metathesis chemistry. General interest was primarily focused on relevant "green chemistry" features related to all types of metathesis reactions (RCM, CM, enyne metathesis, ADMET and ROMP). Diverse opportunities for green and sustainable technologies and industrial procedures based on metahesis have been identified. Largely exemplified was the utility of this broadly applicable strategy in organic synthesis, for accessing natural products and pharmaceuticals, and also its ability to fit in the manufacture of smart and nanostructured materials, self-assemblies with nanoscale morphologies, macromolecular engineering.
Author: Krzysztof Matyjaszewski
Publisher: OUP USA
ISBN: 9780841227569
Category : Science
Languages : en
Pages : 0
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Book Description
This book is focused on recent progress in the rapidly developing field of controlled/living radical polymerization.
Author: Yavuz Imamoglu
Publisher: Springer
ISBN:
Category : Science
Languages : en
Pages : 562
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Book Description
Discover why olefin metathesis has asserted itself as a powerful strategy for obtaining fine chemicals, biologically active compounds, architecturally complex assemblies, new materials, and functionalized polymers. This volume compiles all the latest trends in olefin metathesis. In particular, you’ll learn how olefin metathesis has growing potential for the development of sustainable technologies with many possible industrial applications.
Author: Krzysztof Matyjaszewski
Publisher: OUP USA
ISBN: 9780841239913
Category : Science
Languages : en
Pages : 0
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Book Description
The preparation and characterization of new materials with precisely controlled macromolecular dimensions, functionalities, and decomposition, as well as with well-defined topologies, is perhaps the main focus of contemporary polymer synthesis. The best control of molecular functions can be achieved in a controlled/living polymerization -- a chain growth process without chain breaking reactions. Recently, controlled/living polymerizations have extended to radical systems which are not only commercially important, but also have the largest potential due to the availability of radically polymerizable monomers, facile copolymerization and undemanding experimental conditions. Controlled Radical Polymerization will examine recent advances in mechanistic and synthetic aspects of controlled/living radical (co)polymerization systems. Not only will this book be focused on recent progress in the dynamically developing field of controlled/living radical polymerization, but it will be a sequel to the very popular ACS Symposium Series 685, 768, and 854. The book will consist of >30 chapters separated into seven subsections: Fundamentals, Mechanism of ATRP, Mechanisms of SFRP and Degenerative Transfer Processes, Controlled Architecture by CRP, Organic-inorganic Hybrids by CRP, Biomaterials by CRP and Industrial Applications. This book targets chemists and polymer scientists in academia and in industry.
Author: Krzysztof Matyjaszewski
Publisher:
ISBN:
Category : Language Arts & Disciplines
Languages : en
Pages : 506
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Book Description
This book examines recent progress in controlled/living radical polymerization. The volume focuses on three synthetic methods: atom transfer radical polymerization, nitroxide mediated polymerization and degenerative transfer via addition fragmentation. In addition, the volume covers the preparation and characterization of many never before seen materials using ATRP, NMP and RAFT.
Author: Y. Imamoglu
Publisher: Cambridge University Press
ISBN: 9781402015717
Category : Science
Languages : en
Pages : 384
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Book Description
Proceedings of the NATO Advanced Study Institute, held in Antalya, Turkey, 8-21 September 2002
Author: J. Barrault
Publisher: Elsevier
ISBN: 0080960758
Category : Technology & Engineering
Languages : en
Pages : 435
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Book Description
The recession in the traditional heavy industries along with the development of advanced technologies in all the industrial countries has meant that the impact of heterogeneous catalysis in the synthesis of fine chemicals is becoming increasingly noticeable. The first International Symposium on Heterogeneous Catalysis and Fine Chemicals is to be seen in this perspective. Organised by the Laboratory of Catalysis in Organic Chemistry of the University of Poitiers within the framework of the International Symposia of the `Centre National de la Recherche Scientifique' (CNRS), the symposium provided an opportunity for contact between academic researchers and manufacturers, users (or potential users) of solid catalysts for fine chemical synthesis.Two panels of industrial and academic researchers - one on selective hydrogenation, the other on selective synthesis of substituted aromatics - showed that heterogeneous catalysis already plays a significant role in fine organic chemistry. The main topics of the symposium were introduced in six plenary lectures and three invited communications, maintaining a balance between the industrial and the academic points of view. Some 60 research papers were submitted from which the Scientific Committee selected the 35 communications (oral or poster) which fitted most closely the theme of the symposium. All are reproduced in full in this Proceedings volume.
Author:
Publisher: Elsevier
ISBN: 9780128202067
Category : Science
Languages : en
Pages : 7306
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Book Description
Comprehensive Organometallic Chemistry, Nine Volume Set is the market-leading resource covering all areas of this critical sub-discipline of chemistry. Divided into 9 clear sections, it provides expert coverage of the synthesis, structures, bonding and reactivity of all organometallic compounds, including the mechanisms of the reactions. Applications of organometallic chemistry, such as the role of these compounds as reagents and catalysts for organometallic transformations, and their participation in bioorganometallic chemistry, is then covered. This is a vibrant area, as illustrated by the fact that the 2001, 2005 and 2010 Nobel prizes in Chemistry are all concerned with organometallic chemistry. This new edition will therefore again provide an invaluable and efficient learning resource for all researchers and educators looking for up-to-date analysis of a particular aspect of organometallic chemistry. Comprehensive - CHEC IV will offer a comprehensive review of current heterocycles research and critical insight into the future direction of the field with an emphasis on useful and reliable synthesis and reactions, negating the need for individual searches in the primary literature and across various databases Reputation - The 4th edition will match the impressive reputation of the previous editions as the go-to foundational reference in heterocyclic chemistry Clearly structured - Meticulously organized, articles are split into 9 sections on key topics and clearly cross-referenced to allow students, researchers and professionals to find relevant information quickly and easily Interdisciplinary - chapters written by academics and practitioners from various fields and regions will ensure that the knowledge within is easily understood by and applicable to a large audience
