Sensitive Measurement of One-Bond Carbon–Carbon Spin Coupling Constants at Natural Isotope Abundance

✍ Scribed by Wiktor Koźmiński; David Sperandio; Daniel Nanz

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 427 KB
• Volume: 34
• Category: Article
• ISSN: 0749-1581
• DOI: 10.1002/(sici)1097-458x(199604)34:4<311::aid-omr883>3.0.co;2-m

✦ Synopsis

Two new experiments for the assignment and determination of 1J(13C,'3C) coupling constants of H-C-C

fragments at natural isotope abundance are presented which exploit proton equilibrium polarization and proton signal intensity. The first experiment, which represents a J-resolved modification of the proton-detected INEPT-INADEQUATE experiment, yields highly accurate values of the coupling constants. The second experiment, which features an additional double-quantum evolution period, also yields the coupling constants and allows an unambigous assignment. This last experiment was implemented as a 2D experiment, although it could he run as a 3 D experiment.