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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.

Chemistry. --- Organic Chemistry. --- Organometallic Chemistry. --- Analytical Chemistry. --- Inorganic Chemistry. --- Polymer Sciences. --- Catalysis. --- Analytical biochemistry. --- Chemistry, inorganic. --- Chemistry, Organic. --- Polymers. --- Chimie --- Biochimie analytique --- Chimie organique --- Polymères --- Catalyse --- Electronic books. -- local. --- Nuclear magnetic resonance spectroscopy. --- Phosphorimetry. --- Biochemistry --- Analytical Chemistry --- Chemistry --- Physical Sciences & Mathematics --- Luminescence analysis --- Phosphorescence analysis --- Phosphorimetric analysis --- NMR spectroscopy --- Spectroscopy, NMR --- Spectroscopy, Nuclear magnetic resonance --- Analytical chemistry. --- Inorganic chemistry. --- Organic chemistry. --- Organometallic chemistry. --- Nuclear spectroscopy --- Knight shift --- Chemistry, Analytic --- Activation (Chemistry) --- Chemistry, Physical and theoretical --- Surface chemistry --- Polymere --- Polymeride --- Polymers and polymerization --- Macromolecules --- Inorganic chemistry --- Inorganic compounds --- Analytic biochemistry --- Organic chemistry --- Bioanalytic chemistry --- Bioanalytical chemistry --- Analytical chemistry --- Ressonància magnètica nuclear. --- Compostos orgànics --- Síntesi. --- Organometallic chemistry . --- Polymers  . --- Analysis, Chemical --- Analytic chemistry --- Chemical analysis --- Chemistry, Organometallic --- Metallo-organic chemistry --- Chemistry, Organic --- Organometallic chemistry  --- Polymers   --- Catalysis