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Titlebook: Deuterium and Shift Calculation; U. Fleischer,W. Kutzelnigg,M. Schindler Conference proceedings 1991 Springer-Verlag Berlin Heidelberg 199

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書目名稱Deuterium and Shift Calculation
編輯U. Fleischer,W. Kutzelnigg,M. Schindler
視頻videohttp://file.papertrans.cn/270/269379/269379.mp4
叢書名稱NMR Basic Principles and Progress
圖書封面Titlebook: Deuterium and Shift Calculation;  U. Fleischer,W. Kutzelnigg,M. Schindler Conference proceedings 1991 Springer-Verlag Berlin Heidelberg 199
描述In 1931 Vrey, Brickwedde, and Murphy discovered the hydrogen isotope deuterium. The isotopic enrichment was found to arise from the fact that the electrolysis oflight water is faster than of heavy water [1,2]. This success showed that although different isotopes of an element behave identically from a chemical standpoint the different isotopic masses nevertheless lead to both isotope effects on equilibrium as well as on rate constants of chemical reactions. Soon, ratios of equilibrium constants of isotopic reactions were called "equilibrium isotope effects" (EIE), ratios of isotopic rate constants "kinetic isotope effects" (KIE). Isotope effects have been found to be especially large for those elements which are directly involved in bond breaking and bond formation during the reaction studied [3]. Such effects are, therefore, referred to as "primary". Isotopic substitution in atomic sites which maintain all chemical bonds with their neighbors during the reaction of interest leads then only to smaller "secondary" isotope effects. Because of the unique mass relation between the different hydrogen isotopes hydrogen/deuterium isotope effects are particularly large and have attracted mo
出版日期Conference proceedings 1991
關(guān)鍵詞Magnetische Kernresonanz; Strukturaufkl?rung; chemical reaction; hydrogen; isotope; nuclear magnetic reso
版次1
doihttps://doi.org/10.1007/978-3-642-75932-1
isbn_softcover978-3-642-75934-5
isbn_ebook978-3-642-75932-1Series ISSN 0170-5989
issn_series 0170-5989
copyrightSpringer-Verlag Berlin Heidelberg 1991
The information of publication is updating

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發(fā)表于 2025-3-22 00:04:46 | 只看該作者
Dynamic NMR Spectroscopy in the Presence of Kinetic Hydrogen/Deuterium Isotope Effects,blem to physicists and chemists. So far, kenetic isotope effects have mainly been measured using conventional kenetic methods. In view of the great potential of dynamic multinuclear NMR spectroscopy—which includes the techniques of lineshape analysis, polarization transfer and relaxation time measur
板凳
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地板
發(fā)表于 2025-3-22 06:13:01 | 只看該作者
Deuterium NMR in the Study of Site-Specific Natural Isotope Fractionation (SNIF-NMR),asis of the overall molecular isotope contents accessible by mass spectrometry techniques, important information has been obtained on biochemical and physiological aspects of biosyntheses under natural conditions. The original approaches provided by the NMR study of . of hydrogen must be seen in this context.
5#
發(fā)表于 2025-3-22 09:17:27 | 只看該作者
The IGLO-Method: Ab-initio Calculation and Interpretation of NMR Chemical Shifts and Magnetic Suscedensity is pointed out. The gauge origin problem and its solution by means of the IGLO method is explained. Various methods for the calculation of chemical shifts are compared and the IGLO method is presented in detail both as far as computations and interpretation of the result are concerned.
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發(fā)表于 2025-3-22 15:41:55 | 只看該作者
NMR Basic Principles and Progresshttp://image.papertrans.cn/d/image/269379.jpg
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Deuterium and Shift Calculation978-3-642-75932-1Series ISSN 0170-5989
8#
發(fā)表于 2025-3-23 00:56:10 | 只看該作者
Mark Zandvoort,Maarten J. van der Vlistasis of the overall molecular isotope contents accessible by mass spectrometry techniques, important information has been obtained on biochemical and physiological aspects of biosyntheses under natural conditions. The original approaches provided by the NMR study of . of hydrogen must be seen in this context.
9#
發(fā)表于 2025-3-23 01:35:35 | 只看該作者
Smart Mobility and Geodesign in Urban Lifedensity is pointed out. The gauge origin problem and its solution by means of the IGLO method is explained. Various methods for the calculation of chemical shifts are compared and the IGLO method is presented in detail both as far as computations and interpretation of the result are concerned.
10#
發(fā)表于 2025-3-23 06:26:36 | 只看該作者
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