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Author :
Publisher :
ISBN 13 : 9783642415999
Total Pages : pages
Book Rating : 4.4/5 (159 download)
Download or read book Numerical Data and Functional Relationships in Science and Technology written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David G. Gorenstein
Publisher : Academic Press
ISBN 13 : 0080918417
Total Pages : 619 pages
Book Rating : 4.0/5 (89 download)
Download or read book Phosphorous-31 NMR written by David G. Gorenstein and published by Academic Press. This book was released on 2012-12-02 with total page 619 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phosphorous-31 NMR: Principles and Applications focuses on the evolution of phosphorus-31 nuclear magnetic resonance (NMR) as a widely applied spectroscopic probe of the structure and dynamics of phosphorus-containing compounds. The selection first offers information on the principles and empirical observations of phosphorus-31 chemical shifts and the principles and applications of phosphorus-31 spin-spin coupling constants. Discussions focus on introduction and basic principles, directly bonded phosphorus coupling constants, and two-bond and three-bond coupling constants. The text then ponders on phosphorus-31 NMR of enzyme complexes and paramagnetic probes of enzyme complexes with phosphorus-containing compounds. The manuscript elaborates on the use of chiral thiophosphates and the stereochemistry of enzymatic phosphoryl transfer and DNA and RNA conformations. Topics include helix-coil transitions, sequence dependence of double-stranded DNA conformations, dynamic behavior of RNA and DNA, biological and genetic significance, and stereochemical problems studied with chiral thiophosphates. The conformation and dynamics of nucleic acids and phosphoproteins, relaxation behavior of nucleic acids, and theory and applications of solid-state phosphorus-31 NMR to nucleic acids are also discussed. The selection is a valuable reference for readers interested in the principles and applications of phosphorus-31 nuclear magnetic resonance.
Author : R. R. Gupta
Publisher : Springer
ISBN 13 : 9783642415982
Total Pages : 0 pages
Book Rating : 4.4/5 (159 download)
Download or read book Chemical Shifts and Coupling Constants for Phosphorus-31, Part 3 written by R. R. Gupta and published by Springer. This book was released on 2014-08-06 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nuclear Magnetic Resonance (NMR) is based on the fact that certain nuclei exhibit a magnetic moment, orient by a magnetic field, and absorb characteristic frequencies in the radiofrequency part of the spectrum. The spectral lines of the nuclei are highly influenced by the chemical environment i.e. the structure and interaction of the molecules. NMR is now the leading technique and a powerful tool for the investigation of the structure and interaction of molecules. The present Landolt-Börnstein vol.III/35 "Nuclear Magnetic Resonance (NMR) Data" is therefore of major interest to all scientists and engineers who intend to use NMR to study the structure and the binding of molecules. Vol. III/40H is divided into three subvolumes, all of them describing NMR-data about 31P.
Author : Olaf Kühl
Publisher : Springer Science & Business Media
ISBN 13 : 3540791183
Total Pages : 138 pages
Book Rating : 4.5/5 (47 download)
Download or read book Phosphorus-31 NMR Spectroscopy written by Olaf Kühl and published by Springer Science & Business Media. This book was released on 2008-08-22 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nuclear Magnetic Resonance is a powerful tool, especially for the identification of 1 13 hitherto unknown organic compounds. H- and C-NMR spectroscopy is known and applied by virtually every synthetically working Organic Chemist. Con- quently, the factors governing the differences in chemical shift values, based on chemical environment, bonding, temperature, solvent, pH, etc. , are well understood, and specialty methods developed for almost every conceivable structural challenge. Proton and carbon NMR spectroscopy is part of most bachelors degree courses, with advanced methods integrated into masters degree and other graduate courses. In view of this universal knowledge about proton and carbon NMR spectr- copy within the chemical community, it is remarkable that heteronuclear NMR is still looked upon as something of a curiosity. Admittedly, most organic compounds contain only nitrogen, oxygen, and sulfur atoms, as well as the obligatory hydrogen and carbon atoms, elements that have an unfavourable isotope distribution when it comes to NMR spectroscopy. Each of these three elements has a dominant isotope: 14 16 32 16 32 N (99. 63% natural abundance), O (99. 76%), and S (95. 02%), with O, S, and 34 14 S (4. 21%) NMR silent. N has a nuclear moment I = 1 and a sizeable quadrupolar moment that makes the NMR signals usually very broad and dif cult to analyse.
Author : R. R. Gupta
Publisher : Springer-Verlag
ISBN 13 : 9783540603665
Total Pages : 242 pages
Book Rating : 4.6/5 (36 download)
Download or read book Chemical Shifts and Coupling Constants for Boron-11 and Phosphorus-31 written by R. R. Gupta and published by Springer-Verlag. This book was released on 1997-01-01 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides a comprehensive and evaluated compilation of nuclear magnetic resonance data. Chemical shifts and coupling constants of boron-11 and phosphorus-31 (Subvol. A), fluorine-19, nitrogen-15, and oxygen-17 (Subvol. B), hydrogen-1 (Subvol. C), and carbon-13 (Subvol. D) compounds are tabulated together with the gross- and structure formulas and the most readily available solvents. The temperature or pH dependence, if reported in the original literature, is also indicated. Due to the large amount of the data merely the chemical shifts are presented in the printed version, and all the data, chemical shift and coupling constants are provided on a CD-ROM for Windows 3.x and Windows 95.
Author : Samuel O. Grim
Publisher :
ISBN 13 :
Total Pages : 43 pages
Book Rating : 4.:/5 (227 download)
Download or read book Phosphorus Coordination Compounds of Transition Metals written by Samuel O. Grim and published by . This book was released on 1967 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: The phosphorus-31 nmr spectra of eleven cis and seven trans compounds of the type (R sub n Ph sub 3-n P)2PtCl2, where R = alkyl and n = 1,2, or 3, show that the platinum-195 to phosphorus-31 coupling constant is always larger for the cis compound than for the corresponding trans compound and that the phosphorus chemical shift of the cis compound is upfield from that of the corresponding trans compound. The formation of the tris-phosphine complex by addition of excess tertiary phosphine to the monomer has been demonstrated by conductivity and 31p nmr measurements and confirmed by isolation of the compounds, (MePh2P)3PtCl)Cl and (PrPh2P)3 - PtCl)BPh4. The preparation of several new chlorine bridged dimers is also reported. The phosphorus-31 chemical shifts are reported for twenty-five compounds of the type (RnPh sub 3-nP)M(CO)5, where R is alkyl, n is 0,1,2,3 and M is Cr, Mo, or W. The 183W-31P spin-spin coupling is observed for all the tungsten compounds and a linear correlation exists between these coupling constants and the carbonyl stretching frequencies in the respective compounds. (Author).
Author : Viktor Iaroshenko
Publisher : John Wiley & Sons
ISBN 13 : 3527335722
Total Pages : 586 pages
Book Rating : 4.5/5 (273 download)
Download or read book Organophosphorus Chemistry written by Viktor Iaroshenko and published by John Wiley & Sons. This book was released on 2019-04-22 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: Filling the gap for an up-to-date reference that presents the field of organophosphorus chemistry in a comprehensive and clearly structured way, this one-stop source covers the chemistry, properties, and applications from life science and medicine. Divided into two parts, the first presents the chemistry of various phosphorus-containing compounds and their synthesis, including ylides, acids, and heterocycles. The second part then goes on to look at applications in life science and bioorganic chemistry. Last but not least, such important practical aspects as 31P-NMR and protecting strategies for these compounds are presented. For organic, bioinorganic, and medicinal chemists, as well as those working on organometallics, and for materials scientists. The book, a contributed work, features a team of renowned scientists from around the world whose expertise spans the many aspects of modern organophosphorus chemistry.
Author : John C. Tebby
Publisher : CRC Press
ISBN 13 : 1351362038
Total Pages : 1140 pages
Book Rating : 4.3/5 (513 download)
Download or read book Handbook of Phosphorus-31 Nuclear Magnetic Resonance Data (1990) written by John C. Tebby and published by CRC Press. This book was released on 2017-11-22 with total page 1140 pages. Available in PDF, EPUB and Kindle. Book excerpt: To fully utilize Nuclear Magnetic Resonance (NMR) spectroscopy, a comprehensive and well-organized compilation of NMR data is necessary. While compilations have been available for other important NMR nuclei, such as carbon and fluorine, no comprehensive collection of data has been prepared for phosphorus-until now. The CRC Handbook of Phosphorus-31 Nuclear Magnetic Resonance Data provides a collection of 31P NMR chemical shifts for nearly 20,000 organic and inorganic phosphorus compounds. Each class of phosphorus compound is discussed. Bond types, stereochemistry (with the exception of metal complexes), media, important coupling constants, and data sources are included. The information is systematically organized according to coordination state, the atoms bound to phosphorus, and their connectivities. A comprehensive series of bar charts is also included to allow structure types to be assigned to chemical shift data. This handbook is an invaluable resource for all scientists working with phosphorus compounds, including chemists, biochemists, medical researchers, and pharmaceutical chemists.
Author : Kolio D. Troev
Publisher : Elsevier
ISBN 13 : 008047649X
Total Pages : 308 pages
Book Rating : 4.0/5 (84 download)
Download or read book Chemistry and Application of H-Phosphonates written by Kolio D. Troev and published by Elsevier. This book was released on 2006-09-25 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemistry and Application of H-Phosphonates is an excellent source for those planning the synthesis of new phosphorus-containing compounds and in particular derivatives containing a phosphonate, phosphoramide or phosphonic acid diester group. The rich chemistry, low cost and easy availability of diesters of H-phosphonic acid makes them an excellent choice as synthone in a number of practically important reactions. Phosphonic acid esters are intermediates in the synthesis of important classes of compounds such as alpha-aminophosphonic acids, bisphosphonates, epoxyalkylphosphonates, alpha-hydroxyalkylphosphonates, phosphoramides, poly(alkylene H-phosphonate)s, poly(alkylene phosphate)s, nucleoside H-phosphonates. The synthesis of each of these compound classes is reviewed in detail. Alpha-Aminophosphonic acids are an important class of biologically active compounds, which have received an increasing amount of attention because they are considered to be structural analogues of the corresponding Alpha-amino acids. The utilities of alpha-aminophosphonates as peptide mimics, haptens of catalytic antibodies, enzyme inhibitors, inhibitors of cancers, tumours, viruses, antibiotics and pharmacologic agents are well documented. Alpha-Hydroxyalkanephosphonates are compounds of significant biological and medicinal applications. Dialkyl epoxyalkylphosphonates are of interest because of their use as intermediates in the synthesis of bioactive substances, and as modifiers of natural and synthetic polymers. Bisphosphonates are drugs that have been widely used in different bone diseases, and have recently been used successfully against many parasites. Poly(alkylene H-phosphonate)s and poly(alkylene phosphate)s are promising, biodegradable, water soluble, new polymer-carriers of drugs. Nucleoside H-phosphonates seem to be the most attractive candidates as starting materials in the chemical synthesis of DNA and RNA fragments. The 5’-hydrogen phosphonate-3’-azido-2’,3’-dideoxythimidine is one of the most significant anti-HIV prodrug, which is currently in clinical trials. Chapters review the synthesis; physical and spectral properties (1H, 13C, 31P and 17O NMR data); characteristic reactions; important classes of compounds based on these esters of H-phosphonic acid; their application as physiologically active substances, flame retardants, catalysts, heat and light stabilizers, lubricants, scale inhibitors, polymer-carriers of drugs; preparation of H-phosphonate diesters and general procedures for conducting the most important reactions. * provides ideas for the synthesis of phosphonates, phosphoramides and diesters of phosphonic acid (new phosphorus-containing compounds)* reviews structure, spectra and biological activity of H-phosphonates and their derivatives* examines new areas of application of phosphorus-containing compounds
Author : Paul S. Pregosin
Publisher : Springer Science & Business Media
ISBN 13 : 3642488307
Total Pages : 164 pages
Book Rating : 4.6/5 (424 download)
Download or read book 31P and 13C NMR of Transition Metal Phosphine Complexes written by Paul S. Pregosin and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: For almost a quarter of a century the words "nuclear magnetic reso nance" were synonymous with proton I,leasurements. During this period the literature abounded with a seemingly infinite variety of 1H NHR studies concerned primarily with carbon chemistry. Occasionally a "novel" nucleus was studied and, even in those early days, the poten- 13 14 31 19 tial offered by C, N, P and F was clearly recognized. Despite the allure, the technical difficulties involved in measuring some of these nuclei were far from trivial. Small magnetic moments and low natural abundance in combination with spin-spin coupling from other nuclei, mostly protons, resulted in a signal-to-noise problem whose severity effectively excluded the study of metal complexes with unfa vorable solubility characteristics. The first important breakthrough came with the advent of broad band 1H-decoupling. For example, the featureless broad 31p resonance associated with the commonly used ligand triphenyl phosphine is converted to a sharp, more readily ob served singlet when wide-band decoupling is employed (see Fig. 1). Despite this improvement investigation of more interesting molecules, such as catalytically active complexes was forced to await the devel opment of Fourier Transform methods since only with relatively rapid signal averaging methods could sufficient signal-to-noise ratios be achieved.
Author : Ernö Pretsch
Publisher : Springer Science & Business Media
ISBN 13 : 3662224550
Total Pages : 325 pages
Book Rating : 4.6/5 (622 download)
Download or read book Tables of Spectral Data for Structure Determination of Organic Compounds written by Ernö Pretsch and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although numerical data are, in principle, universal, the compilations presented in this book are extensively annotated and interleaved with text. This translation of the second German edition has been prepared to facilitate the use of this work, with all its valuable detail, by the large community of English-speaking scientists. Translation has also provided an opportunity to correct and revise the text, and to update the nomenclature. Fortunately, spectroscopic data and their relationship with structure do not change much with time so one can predict that this book will, for a long period of time, continue to be very useful to organic chemists involved in the identification of organic compounds or the elucidation of their structure. Klaus Biemann Cambridge, MA, April 1983 Preface to the First German Edition Making use of the information provided by various spectroscopic tech niques has become a matter of routine for the analytically oriented organic chemist. Those who have graduated recently received extensive training in these techniques as part of the curriculum while their older colleagues learned to use these methods by necessity. One can, therefore, assume that chemists are well versed in the proper choice of the methods suitable for the solution of a particular problem and to translate the experimental data into structural information.
Author : Louis D. Quin
Publisher :
ISBN 13 :
Total Pages : 134 pages
Book Rating : 4.3/5 (91 download)
Download or read book Practical Interpretation of P-31 NMR Spectra and Computer Assisted Structure Verification written by Louis D. Quin and published by . This book was released on 2004 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Myrlene Gee
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (134 download)
Download or read book Phosphorus Chemical Shift and Indirect Phosphorus-31-phosphorus-31 Spin-spin Coupling Tensors in Compounds Containing Phosphorus-phosphorus Bonds written by Myrlene Gee and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : M. Witanowski
Publisher : Springer Science & Business Media
ISBN 13 : 1468481754
Total Pages : 406 pages
Book Rating : 4.4/5 (684 download)
Download or read book Nitrogen NMR written by M. Witanowski and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: To date nitrogen NMR has been discussed in research papers and review articles throughout the scientific literature. It has been our aim in preparing this book to provide a comprehen sive account of the widely spread applications of nitrogen NMR. The relevant literature has been surveyed from the beginnings of NMR until early 1972. The steady annual growth in the number of references cited since 1965 is ample evidence of the ever increasing importance of the subject. Sufficient theoretical and experimental background is given for an understanding of the applications dealt with in later chapters. The basic principles of NMR are developed with a theoretical approach to chemical shifts and spin-spin coupling constants, particular emphasis being given to nitrogen nuclei. Following this the experimental aspects of nitrogen NMR are adequately described. Special emphasis is given to the observable effects of the nuclear quadrupole moment of the 14 N nucleus. It is appro priate that this topic be dealt with in depth since quadrupolar interactions frequently dominate the information available from a study of the 14 N nucleus and other nuclei spin coupled to it. The applications of nitrogen chemical shift data to organic and inorganic molecules are covered in two extensive chapters which include the effects of paramagnetism on nitrogen NMR.
Author : Harold Goldwhite
Publisher : Cambridge University Press
ISBN 13 : 9780521229784
Total Pages : 132 pages
Book Rating : 4.2/5 (297 download)
Download or read book Introduction to Phosphorous Chemistry written by Harold Goldwhite and published by Cambridge University Press. This book was released on 1981-04-30 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 1981 introduction to the chemistry of a single element, phosphorus, covers many of the major themes of chemistry. Important in inorganic and organic chemistry and in biochemistry, phosphorus is also of considerable economic significance and plays a vital role in the biosphere. By presenting a detailed treatment of selected topics, this book provides a concise account of phosphorus chemistry suitable for anyone with an interest in the field. The book provides a survey of phosphorus compounds by structural and bond types, a review of physical methods in phosphorus chemistry, a review of basicity and co-ordination chemistry of phosphorus donors, a discussion of phosphorus in its group, and a chapter on reagents containing phosphorus in general chemistry. A critical bibliography introduces the reader to the advanced literature. S. I. Units are used throughout, but c.g.s units are also given when appropriate.
Author : Martin Grayson
Publisher :
ISBN 13 :
Total Pages : 520 pages
Book Rating : 4.:/5 (25 download)
Download or read book Topics in Phosphorus Chemistry written by Martin Grayson and published by . This book was released on 1964 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Paul Hodgkinson
Publisher : Royal Society of Chemistry
ISBN 13 : 1839164964
Total Pages : 299 pages
Book Rating : 4.8/5 (391 download)
Download or read book Nuclear Magnetic Resonance written by Paul Hodgkinson and published by Royal Society of Chemistry. This book was released on 2021-11-11 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nuclear magnetic resonance has proved a uniquely versatile and powerful spectroscopic technique, with applications across chemistry, physics and medicine. The success of NMR and its constant redevelopment means that the literature is vast and wide-ranging. Each chapter in this volume is a distillation of the key recent literature in different areas covering the spectrum of NMR theory and practice, and including solution-state, solid-state and in-vivo NMR. These reports will be invaluable both for new researchers wishing to engage with literature for the first time, and for seasoned practitioners, particularly service managers, wishing to keep in touch with the ever-expanding ways in which NMR is used.
