The isotropic chemical shift and the nuclear quadrupole coupling constant for 14 N were obtained for 14 inorganic nitrates by solidstate MAS NMR measurements at two different field strengths, 9.4 and 11.7 T. The compounds studied were polycrystalline powders of AgNO 3 , Al(NO 3 ) 3 , Ba(NO 3 ) 2 , C
โฆ LIBER โฆ
Structure of Liquid N -Methylacetamide: Temperature Dependence of NMR Chemical Shifts and Quadrupole Coupling Constants
โ Scribed by Ludwig, R.; Weinhold, F.; Farrar, T. C.
- Book ID
- 120418048
- Publisher
- American Chemical Society
- Year
- 1997
- Tongue
- English
- Weight
- 268 KB
- Volume
- 101
- Category
- Article
- ISSN
- 1089-5639
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## Abstract The chemical shifts of amino acid __N__โcarboxyanhydrides (NCAs) and cyclic or linear urethanes are less sensitive to solvent effects than those of amides and lactams. The values of the oneโbond ^15^N๏ฃฟ^1^H coupling constants depend on the solvent and are 5โ8 Hz larger than those of urea