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Nuclear Magnetic Resonance is a powerful tool, especially for the identification of 1 13 hitherto unknown organic compounds. H- and C-NMR spectroscopy is known and applied by virtually every synthetically working Organic Chemist. Con- quently, the factors governing the differences in chemical shift values, based on chemical environment, bonding, temperature, solvent, pH, etc. , are well understood, and specialty methods developed for almost every conceivable structural challenge. Proton and carbon NMR spectroscopy is part of most bachelors degree courses, with advanced methods integrated into masters degree and other graduate courses. In view of this universal knowledge about proton and carbon NMR spectr- copy within the chemical community, it is remarkable that heteronuclear NMR is still looked upon as something of a curiosity. Admittedly, most organic compounds contain only nitrogen, oxygen, and sulfur atoms, as well as the obligatory hydrogen and carbon atoms, elements that have an unfavourable isotope distribution when it comes to NMR spectroscopy. Each of these three elements has a dominant isotope: 14 16 32 16 32 N (99. 63% natural abundance), O (99. 76%), and S (95. 02%), with O, S, and 34 14 S (4. 21%) NMR silent. N has a nuclear moment I = 1 and a sizeable quadrupolar moment that makes the NMR signals usually very broad and dif cult to analyse.

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Chemistry. --- Polymer Sciences. --- Analytical Chemistry. --- Nanotechnology. --- Surfaces and Interfaces, Thin Films. --- Organic Chemistry. --- Analytical biochemistry. --- Chemistry, Organic. --- Polymers. --- Surfaces (Physics). --- Chimie --- Biochimie analytique --- Chimie organique --- Polymères --- Nanotechnologie --- Surfaces (Physique) --- Biomolecules --- Nanostructures --- Molecular biology --- Scanning tunneling microscopy --- Atomic force microscopy --- Analysis --- Research --- Molecular Biology --- Nanotechnology --- Microscopy, Scanning Probe --- Microscopy --- Genetics --- Biochemistry --- Natural Science Disciplines --- Miniaturization --- Manufactured Materials --- Technology --- Biological Science Disciplines --- Investigative Techniques --- Disciplines and Occupations --- Diagnostic Imaging --- Chemistry --- Biology --- Technology, Industry, and Agriculture --- Analytical, Diagnostic and Therapeutic Techniques and Equipment --- Technology, Industry, Agriculture --- Diagnostic Techniques and Procedures --- Diagnosis --- Organic Chemistry --- Health & Biological Sciences --- Physical Sciences & Mathematics --- Atomic force microscopy. --- Scanning tunneling microscopy. --- Analysis. --- Research. --- STM (Microscopy) --- AFM (Microscopy) --- Analytical chemistry. --- Organic chemistry. --- Materials --- Thin films. --- Surfaces. --- Scanning probe microscopy --- Nanoscience --- Physics --- Molecular technology --- Nanoscale technology --- High technology --- Organic chemistry --- Surface chemistry --- Surfaces (Technology) --- Analytic biochemistry --- Chemistry, Analytic --- Polymere --- Polymeride --- Polymers and polymerization --- Macromolecules --- Bioanalytic chemistry --- Bioanalytical chemistry --- Analytical chemistry --- Polymers  . --- Materials—Surfaces. --- Films, Thin --- Solid film --- Solid state electronics --- Solids --- Coatings --- Thick films --- Analysis, Chemical --- Analytic chemistry --- Chemical analysis --- Biomolecules - Analysis --- Nanostructures - Analysis --- Molecular biology - Research