Download or read book RADICAUX ORGANIQUES ET CATALYSE written by CELINE.. MARCADAL ABBADI and published by . This book was released on 1998 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: LE N-HYDROXYPHTALIMIDE (NHPI) EST CAPABLE DE CATALYSER L'OXYDATION AEROBIE D'UNE GRANDE VARIETE DE SUBSTRATS ORGANIQUES EN PARTICULIER LES ALKYLBENZENES VIA LE RADICAL PHTALIMIDE-N-OXYLE (PINO). DEUX NOUVEAUX SYSTEMES CATALYTIQUES UTILISANT LE NHPI ONT ETE MIS AU POINT. ILS FONCTIONNENT A PRESSION ET TEMPERATURE AMBIANTES. LE PREMIER, BASE SUR UNE DOUBLE CATALYSE, MET EN JEU LE CHLORURE CUIVREUX ET L'OXYGENE MOLECULAIRE. LE SECOND MET EN OEUVRE L'AUTOXYDATION DE L'ACETALDEHYDE. CES DEUX SYSTEMES FOURNISSENT MAJORITAIREMENT LES ARYLS CETONES A PARTIR DES HYDROCARBURES BENZYLIQUES AVEC DE BONS RENDEMENTS. DANS LE BUT DE MODULER LA REACTIVITE DU NHPI DES ANALOGUES ONT ETE SYNTHETISES ET LA STABILITE DES RADICAUX CORRESPONDANTS A ETE ETUDIEE PAR ELECTROCHIMIE. CES NOUVEAUX SYSTEMES D'OXYDATION SONT UTILISABLES EN CATALYSE ASYMETRIQUE. POUR CELA, UNE METHODE ORIGINALE D'ACCES A DES N-HYDROXYIMIDES A CHIRALITE AXIALE A ETE DEVELOPPEE. L'ETAPE CLE DE LA SYNTHESE EST UNE REACTION DE DIELS-ALDER ENTRE UN ISOBENZOFURANNE ET LE DIMETHYL FUMARATE. CES CATALYSEURS PERMETTENT L'OXYDATION ENANTIOSELECTIVE D'INDANES PROCHIRAUX ET LE DEDOUBLEMENT CINETIQUE DE CERTAINS ACETALS RACEMIQUES. LES RESULTATS OBTENUS REPRESENTENT LES PREMIERS EXEMPLES DE CATALYSE ASYMETRIQUE RADICALAIRE METTANT EN JEU DES RADICAUX NON METALLIQUES.

Download or read book Consid rations sur quelques classes de compos s organiques et sur les radicaux organiques en g n ral written by Louis Henry and published by . This book was released on 1859 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book La catalyse en chimie organique written by Paul Sabatier and published by . This book was released on 1913 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Catalysis by Acids and Bases written by B. Imelik and published by Elsevier. This book was released on 1985-02-01 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of the great importance of acid catalysis in the petrochemical industry, extensive research has been carried out during the last 30 years concerning the fundamental and applied aspects of catalysis by acids. In contrast, base-catalyzed reactions have received little attention in heterogeneous catalysis. The aim of this symposium was to evaluate our knowledge of the important area of acid and base catalysis and to cover a broad range of solids, zeolite chemistry being only one aspect of heterogeneous catalysis.

Download or read book Radicaux Libres Organiques written by and published by Centre National de la Recherche Scientifique, CNRS. This book was released on 1978 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Catalyse Et Catalyseurs en Chimie Organique written by Pierre Brun and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Radicals in Organic Synthesis written by Bernd Giese and published by C R C Press Reprints. This book was released on 1986 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Radicaux libres et stress oxydant Aspects biologiques et pathologiques broch written by DELATTRE Jacques and published by Lavoisier. This book was released on 2007-01-23 with total page 587 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radicaux libres et stress oxydant, ouvrage sans précédent en français, aborde la problématique du stress oxydant dans son intégralité, depuis la chimie du radical libre jusqu'à la description de son rôle dans la physiopathologie des maladies chroniques. Les développements très détaillés de l'ouvrage s'articulent en deux parties. La première fait le point des connaissances concernant la physicochimie des espèces réactives de l'oxygène et de l'azote, envisageant leurs sources cellulaires, leurs principaux effets biologiques et les dommages qu'elles créent aux biomolécules. Les caractéristiques des antioxydants d'origine endogène et exogène (liés aux apports nutritionnels) sont également traitées. La deuxième partie décrit précisément les effets délétères du stress oxydant sur les molécules du vivant, permettant de comprendre son rôle dans le vieillissement physiologique et dans un grand nombre de pathologies majeures, fréquentes ou émergentes : athérosclérose, diabète, pathologies articulaires, maladies cardiaques, cancer, maladies neurodégénératives. Les bilans de supplémentations en antioxydants et (ou) de thérapeutiques antioxydantes complémentaires sont également présentés. Conçu par d'éminents spécialistes nationaux et internationaux, Radicaux libres et stress oxydant, s'adresse aux chercheurs, médecins, pharmaciens, scientifiques et aux étudiants des 2e et 3e cycles.

Download or read book La catalyse en chimie organique written by Paul Sabatier and published by . This book was released on 1913 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Free Radicals in Organic Chemistry written by Jacques Fossey and published by Wiley. This book was released on 1995-11-06 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Illustrious researchers offer an excellent introduction to the structure, formation and reactivity of free radicals. Contains a complete overview of the numerous and varied applications of free radicals within organic chemistry with special attention to reaction mechanisms and novel responses. Includes detailed accounts along with actual examples of the most recent developments in the field.

Download or read book Free Radicals in Organic Synthesis written by D. I. Davies and published by Springer. This book was released on 2011-12-09 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Free Radical Chemistry has a comparatively long history. Before the accep­ tance of the quadrivalence of carbon, various attempts were made to prepare trivalent carbon species like methyl and ethyl. Initial investigations involving reaction between alkyl iodides and zinc were thought to be successful \ but were subsequently branded as failures 2. In fact free methyl and ethyl were transient radicals involved in the reactions, but because of their short lifetimes the radicals were not detected, and only the hydrocarbons formed by dimeri­ th sation of the radicals were isolated. At the beginning of the 20 century Gom­ berg discovered the stable triarylmethyl radicals 3, and then in the 1920's Pa­ neth 4 showed that free alkyl radicals could have a short lifetime in the gas phase. Free radicals as intermediates in reactions in solution were largely un­ recognised until in 1937 Hey and Waters 5 interpreted a number of reactions, which did not fit into the then developing electronic theory of Organic Chem­ istry6,7, by suggesting that they involved the intermediacy of free radicals. The other contemporary pioneer Kharasch 8 also proposed free radicals as interme­ diates in certain reactions in solution, many involving organometallic species. However in the 1930 - 1950 period free radicals were not universally accepted as respectable reaction intermediates as evidenced by the initial rejection of the work of Koelsch 9 and the stand against free radicals made by Hodgson 10.

Download or read book Chimie et biochimie radicalaires written by Chantal Houée-Levin and published by Humensis. This book was released on 2015-07-20T00:00:00+02:00 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Si les radicaux libres ne sont connus du grand public que pour leur rôle dans le processus de vieillissement, ils intéressent les chercheurs dans de nombreux domaines de la chimie et de la biochimie. Ils sont également impliqués dans un grand nombre de procédés industriels : craquage pétrolier, synthèse de polymères, stérilisation des aliments, dépollution des eaux... Ce livre vient combler un manque. Il constitue une synthèse des connaissances actuelles en matière de radicaux libres. Le lecteur y trouvera un point complet sur leurs modes de production et de détection, leur structure et leur réactivité, ainsi que leurs applications industrielles, le mécanisme de leur formation dans le vivant et ses conséquences. Un ouvrage de référence, destiné aux étudiants, aux chercheurs et aux ingénieurs.

Download or read book French Bibliographical Digest written by and published by . This book was released on 1951 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Les radicaux libres en chimie organique written by Jacques Fossey and published by Elsevier Masson. This book was released on 1993 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book La catalyse en chimie organique written by C. Chabrié and published by . This book was released on 1913 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book La catalyse en chimie organique written by and published by . This book was released on 1913 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reactive Intermediates in Organic and Biological Electrochemistry written by Electrochemical Society. Organic and Biological Electrochemistry Division and published by The Electrochemical Society. This book was released on 2001 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: