1981 | OriginalPaper | Buchkapitel
Medium Effects in 15N Spectroscopy
verfasst von : Prof. Dr. Gérard J. Martin, Prof. Dr. Maryvonne L. Martin, Dr. Jean-Paul Gouesnard
Erschienen in: 15N-NMR Spectroscopy
Verlag: Springer Berlin Heidelberg
Enthalten in: Professional Book Archive
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Due to the fact that a nitrogen atom incorporated in a molecule, exhibits a Lewis basicity which depends on the degree of lone-pair delocalisation, solvent effects are expected to be greater in 15N spectroscopy than in carbon NMR. Examination of Table 5.1 shows that amines, amides (or ureas), nitriles and nitro derivatives are characterized by different values of polarity parameters indicatory of their electron-donating or -accepting abilities.