- Long-range proton-carbon coupling constants: NMR methods and applications.
Long-range proton-carbon coupling constants: NMR methods and applications.
Progress in nuclear magnetic resonance spectroscopy (2013-08-22)
Teodor Parella, Juan Félix Espinosa
PMID23962883
ABSTRACT
A general review of novel NMR methods to measure heteronuclear long-range proton-carbon coupling constants ((n)JCH; n>1) in small molecules is made. NMR experiments are classified in terms of NMR pulse scheme and cross-peak nature. A discussion about simplicity, general applicability and accuracy for each particular NMR experiment is presented and exemplified. Important aspects such as the sign determination and measurement of very small coupling values involving protonated and non-protonated carbons as well as the complementarity between different experiments are also discussed. Finally, a compilation of applications in structural and conformational analysis of different types of molecules since 2000 is surveyed.
MATERIALS
Product Number
Brand
Product Description
Sigma-Aldrich
Activated Charcoal Norit®, Norit® SX2, powder, from peat, multi-purpose activated charcoal, steam activated and acid washed
Carbon, foil, not light tested, 300x300mm, thickness 0.075mm, flexible graphite, 99.8%
Carbon, foil, 15mm disks, thickness 0.2mm, flexible graphite, 99.8%
Carbon, foil, 25x25mm, thickness 0.25mm, rigid graphite, fine grain size, 99.997%
Carbon, foil, 500x500mm, thickness 0.2mm, flexible graphite, 99.8%
Carbon, foil, 25x25mm, thickness 0.2mm, flexible graphite, 99.8%
Carbon, foil, 500x500mm, thickness 0.35mm, flexible graphite, 99.8%
Carbon, foil, 200x200mm, thickness 1.0mm, rigid graphite, fine grain size, 99.95%
Carbon, foil, 100x100mm, thickness 5.0mm, rigid graphite, medium grain size, 99.5%
Carbon, foil, 500x500mm, thickness 0.5mm, flexible graphite, 99.8%
Carbon, foil, 250x250mm, thickness 0.35mm, flexible graphite, 99.8%
Carbon, foil, 25x25mm, thickness 0.1mm, pyrolytic graphite, 99.99%
Carbon, foil, 10x10mm, thickness 2.0mm, hOpg
Carbon, foil, 500x500mm, thickness 1.0mm, flexible graphite, 99.8%
Carbon, foil, 25x25mm, thickness 0.5mm, rigid graphite, fine grain size, 99.95%
Carbon, foil, 150x150mm, thickness 0.5mm, flexible graphite, 99.8%
Carbon, rod, 100mm, diameter 1.0mm, graphite, 99.95%
Carbon, foil, 50x50mm, thickness 0.25mm, rigid graphite, fine grain size, 99.997%
Carbon, foil, 150x150mm, thickness 5.0mm, rigid graphite, medium grain size, 99.5%
Carbon, foil, 150x150mm, thickness 0.2mm, flexible graphite, 99.8%
Carbon, foil, 150x150mm, thickness 1.0mm, rigid graphite, fine grain size, 99.95%
Carbon, foil, 50x50mm, thickness 0.125mm, rigid graphite, fine grain size, 99.95%
Carbon, foil, 250x250mm, thickness 1.0mm, flexible graphite, 99.8%