Download or read book New Aspects in Phosphorus Chemistry IV written by Jean-Pierre Majoral and published by Springer. This book was released on 2014-03-12 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: with contributions by numerous experts

Download or read book New Aspects in Phosphorus Chemistry II written by Jean-Pierre Majoral and published by Springer Science & Business Media. This book was released on 2002 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strong non-ionic bases are highly advantageous as stoichiometric reagents and as catalysts in synthetic organic chemistry owing to side reactions that f- quently occur when ionic bases such as LDA or alkali metal alkoxides are employed. A second reason that non-ionic bases are frequently more useful in these applications is that such bases are often more soluble in less polar organic solvents, particularly at low temperatures. Thirdly, non-ionic bases can provide reactive naked or tightly associated deprotonated substrate anions that are s- bilized by the relatively large, poorly solvated cations formed by the protonated base. In such cations, extensive positive charge delocalization can occur. Prior to our work on pro-azaphosphatranes of type 1 (Scheme 1), the very strong n- ionic bases utilized for organic transformations were largely confined to the nitrogenous bases shown below (Scheme 2). Scheme 1 Scheme 2 4 J.G. Verkade 2 Uses of Strong Nonionic Nitrogen Bases 2. 1 Amines One of the earliest strong non-ionic bases to make its appearance was Proton Sponge and its derivatives [1] and these systems have been reviewed [2]. More recently Proton Sponge has been used in the palladium-catalyzed arylation of 2,3-dihydrofuran [3], and it also catalyzes Knoevenagel condensations of s- strates possessing activated methylene groups [4]. Recently the synthesis of the macrocyclic tetramine below (Scheme 3) was reported [5]. The encrypted nitrogens are very basic (pK,24.

Download or read book New Aspects in Phosphorus Chemistry II written by Jean-Pierre Majoral and published by . This book was released on 2014-01-15 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New Aspects in Phosphorus Chemistry I written by Jean-Pierre Majoral and published by . This book was released on 2014-01-15 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New Aspects in Phosphorus Chemistry V written by Jean-Pierre Majoral and published by Springer. This book was released on 2005-03-17 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New Aspects in Phosphorus Chemistry V written by Jean-Pierre Majoral and published by Springer Science & Business Media. This book was released on 2005 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phosphorus chemistry is a diverse field and this volume focuses on new developments of "old themes" with different approaches and ideas, state of the art for two topics of general interest, and the emerging fields of research. This volume only describes in part the huge number of original papers on phosphorus-related topics.

Download or read book New Aspects in Phosphorus Chemistry II written by Jean-Pierre Majoral and published by Springer. This book was released on 2010-10-19 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: .

Download or read book New Aspects in Phosphorus Chemistry III written by Jean-Pierre Majoral and published by Springer. This book was released on 2010-12-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New Aspects in Phosphorous Chemistry written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Review written by Ekkehard Fluck and published by . This book was released on 1982 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New Aspects in Phosphorus Chemistry I written by Jean-Pierre Majoral and published by Springer. This book was released on 2003-07-01 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Undoubtedly the chemistry of phosphorus appears more and more attractive in the sense that phosphorus presents an extraordinary versatile behaviour that allows the synthesis of a large number of different phosphorus reagents usable for applications in different fields, from biology to material science without f- getting key applications in catalysis. The full maturity of this topic of research can be explained by all the acquired knowledge over these twenty last years. Organic and inorganic chemistries of P , P and P species have been the s- in ]V v ject of thousands of publications while the chemistry of low coordinated ph- phorus derivatives experienced its hour of glory from the 1970s to the early 1990s. In parallel, interactions between phosphorus compounds and transition metals afforded many complexes, a lot of which present fascinating properties as catalysts. The interest in all these themes really is not decreasing, indeed some fas- nating areas of research are emerging or are the subject of many investigations: the medicinal chemistry of bisphosphonates, the role of phosphorus in biology, phosphorus ligands in radiopharmaceutical chemistry, phosphorus in material science, new polymers and dendrimers incorporating phosphorus, and as- metric catalysis to name but a few. Indeed researchers, benefitting from their background in basic phosphorus chemistry are developing many new fields of research.

Download or read book New Aspects in Phosphorus Chemistry III written by Jean-Pierre Majoral and published by Springer Science & Business Media. This book was released on 2003 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New Aspects in Phosphorus Chemistry II written by Jean-Pierre Majoral and published by Springer. This book was released on 2003-07-01 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation What makes phosphorus so attractive that virtually every chemist can profit from its properties? Applications in different fields have already been realized or are undercurrent investigation.

Download or read book New Aspects of Low Co ordination Phosphorus Chemistry written by Markus Brym and published by . This book was released on 2004 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Topics In Phosphate Chemistry written by Marie-therese Averbuch-pouchot and published by World Scientific. This book was released on 1996-08-23 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book aims to open new fields of interest in phosphate chemistry and to suggest a new system of classification for phosphates. Due to the very rapid development of this branch of chemistry during the last thirty years and the very confusing nomenclature often used in chemical literature, this first attempt seems not only justified but necessary. The suggested classification is not revolutionary, with respect to condensed phosphates for instance, but establishes clear boundaries between some categories of compounds such as adducts and heteropolyanion-compounds. The first chapters cover the present state of phosphate chemistry in a general way and could serve as an introduction to phosphates for some categories of students or teachers. The next few chapters are devoted to more specialized topics which would be of interest to chemists, crystallographers or solid-state specialists.Some specific aspects of the crystal chemistry of phosphates, such as the geometry of the networks built by acidic phosphoric anions, for instance, are covered for the first time. The final chapter suggests some improvements for the present system of classification for phosphates.In addition, presented for the first time are the results recently obtained for the replacement of asbestos by harmless biodegradable phosphate fibers.

Download or read book The Chemistry of Phosphorus written by John Emsley and published by John Wiley & Sons. This book was released on 1976 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Fuel Cells written by and published by Elsevier. This book was released on 2007-04-23 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fuel cells have been recognized to be destined to form the cornerstone of energy technologies in the twenty-first century. The rapid advances in fuel cell system development have left current information available only in scattered journals and Internet sites. Advances in Fuel Cells fills the information gap between regularly scheduled journals and university level textbooks by providing in-depth coverage over a broad scope. The present volume provides informative chapters on thermodynamic performance of fuel cells, macroscopic modeling of polymer-electrolyte membranes, the prospects for phosphonated polymers as proton-exchange fuel cell membranes, polymer electrolyte membranes for direct methanol fuel cells, materials for state of the art PEM fuel cells, and their suitability for operation above 100°C, analytical modelling of direct methanol fuel cells, and methanol reforming processes. - Includes contributions by leading experts working in both academic and industrial R&D - Disseminates the latest research discoveries - A valuable resource for senior undergraduates and graduate students, it provides in-depth coverage over a broad scope