| 书目名称 | Deuterium and Shift Calculation |
| 编辑 | U. Fleischer,W. Kutzelnigg,M. Schindler |
| 视频video | |
| 丛书名称 | NMR Basic Principles and Progress |
| 图书封面 |  |
| 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 |
| 关键词 | Magnetische Kernresonanz; Strukturaufklärung; chemical reaction; hydrogen; isotope; nuclear magnetic reso |
| 版次 | 1 |
| doi | https://doi.org/10.1007/978-3-642-75932-1 |
| isbn_softcover | 978-3-642-75934-5 |
| isbn_ebook | 978-3-642-75932-1Series ISSN 0170-5989 |
| issn_series | 0170-5989 |
| copyright | Springer-Verlag Berlin Heidelberg 1991 |
发表于 2025-3-21 16:40:15
