Chemical Shifts of Nitrogen
Author : B. E. Holder
Publisher :
Page : 6 pages
File Size : 34,15 MB
Release : 1955
Category : Nitrogen
ISBN :
Author : B. E. Holder
Publisher :
Page : 6 pages
File Size : 34,15 MB
Release : 1955
Category : Nitrogen
ISBN :
Author : M. Witanowski
Publisher : Springer Science & Business Media
Page : 406 pages
File Size : 48,76 MB
Release : 2012-12-06
Category : Science
ISBN : 1468481754
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 : Joseph B. Lambert
Publisher :
Page : 7 pages
File Size : 22,31 MB
Release : 1964
Category :
ISBN :
Author : Atta-ur-Rahman
Publisher : Bentham Science Publishers
Page : 289 pages
File Size : 26,92 MB
Release : 2016-11-22
Category : Science
ISBN : 168108287X
Applications of NMR Spectroscopy is a book series devoted to publishing the latest advances in the applications of nuclear magnetic resonance (NMR) spectroscopy in various fields of organic chemistry, biochemistry, health and agriculture. The fifth volume of the series features several reviews focusing on NMR spectroscopic techniques for identifying natural and synthetic compounds (polymer and peptide characterization, GABA in tinnitus affected mice), medical diagnosis and therapy (gliomas) and food analysis. The spectroscopic methods highlighted in this volume include high resolution proton magnetic resonance spectroscopy and solid state NMR.
Author : Gladys Rodríguez Maldonado
Publisher :
Page : 116 pages
File Size : 29,89 MB
Release : 1968
Category : Chemistry, Organic
ISBN :
Author : Richard Bramley
Publisher :
Page : pages
File Size : 37,7 MB
Release : 1986
Category :
ISBN :
Author : Olaf Kühl
Publisher : Springer Science & Business Media
Page : 138 pages
File Size : 16,21 MB
Release : 2008-08-22
Category : Science
ISBN : 3540791183
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 : Alan R. Katritzky
Publisher :
Page : 0 pages
File Size : 21,54 MB
Release : 1996
Category : Heterocyclic chemistry
ISBN : 9780080262000
Author : William R. Dolbier, Jr.
Publisher : John Wiley & Sons
Page : 418 pages
File Size : 20,76 MB
Release : 2016-08-24
Category : Science
ISBN : 1118831098
Following its well-received predecessor, this book offers an essential guide to chemists for understanding fluorine in spectroscopy. With over 1000 compounds and 100 spectra, the second edition adds new data – featuring fluorine effects on nitrogen NMR, chemical shifts, and coupling constants. • Explains how to successfully incorporate fluorine into target molecules and utilize fluorine substituents to structurally characterize organic compounds • Includes new data on nitrogen NMR, focusing on N-15, to portray the influence of fluorine upon nitrogen NMR chemical shifts and coupling constants • Expands on each chapter from the first edition with additional data and updated discussion from recent findings • "The flawless ordering of material covered in this stand-alone volume is such that information can be found very easily." – Angewandte Chemie review of the first edition, 2010
Author : George C. Levy
Publisher : John Wiley & Sons
Page : 240 pages
File Size : 49,56 MB
Release : 1979
Category : Science
ISBN :