Premium
Sensitive Measurement of One‐Bond Carbon–Carbon Spin Coupling Constants at Natural Isotope Abundance
Author(s) -
Koźmiński Wiktor,
Sperandio David,
Nanz Daniel
Publication year - 1996
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/(sici)1097-458x(199604)34:4<311::aid-omr883>3.0.co;2-m
Subject(s) - chemistry , natural abundance , coupling constant , abundance (ecology) , isotope , proton , coupling (piping) , polarization (electrochemistry) , carbon 13 , analytical chemistry (journal) , chemical physics , nuclear physics , mass spectrometry , physics , environmental chemistry , mechanical engineering , chromatography , fishery , engineering , biology , particle physics
Two new experiments for the assignment and determination of 1 J ( 13 C, 13 C) 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 be run as a 3D experiment.