✍ Scribed by Max Ratier; Bernard Jousseaume; Nicolas Noiret; Nathalie Petit; Jean-Claude Lartigue; Michel Pétraud
No coin nor oath required. For personal study only.
^n^J(^119^Sn, ^1^H) coupling constants were determined by 2D ^13^C^1^H and ^119^Sn^1^H non‐refocused COLOC (TPPI) correlation methods. As the 2D ^13^C^1^H method only gives access to coupling constants directly measured from the spectra, the proposed non‐refocused COLOC technique is more general since it allows measurements in the case of satellites which are non‐observable in ^13^C NMR spectra. An optimization method for the τ value in COLOC experiments is also proposed.
📜 SIMILAR VOLUMES
Two 1H-detected one-dimensional gradient enhanced experiments and corresponding reference experiments are proposed for the measurement of heteronuclear long-range nJCH coupling constants in organic molecules. These experiments use inverse detection and selective carbon excitation, provide excellent
## Abstract A gradient‐selected __J__‐HMBC experiment is presented. Coherence selection with magnetic field gradients results in HMBC spectra in which __t__~1~ noise is very low or completely eliminated. This makes it possible to detect unequivocally very small (<2 Hz) long‐range H,X coupling const