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- W349289341 abstract "Nuclear magnetic resonance (NMR) spectroscopy is fast becoming a unique tool to elucidate the structural features of even complex organic molecules. The chapter focuses on the application of NMR spectroscopy technique to the chemistry of indole and its derivatives that has been the major field of research for several years. NMR has been used to (a) study the structures of indoles, substituted in both heterocyclic as well as the benzenoid ring, (b) tautomeric structures and equilibria, (c) the stereochemistry of side-chain substituents , and (d) the protonation of indoles. Four main difficulties are discussed such as difficulty in demonstration the theoretically expected linear relation between chemical shifts and electron densities, few and scattered reports of the systematic study of the spectra of indoles, much work is to be done on the elucidation of benzenoid substitution, and little research has been carried out on nuclei other than hydrogen. Using single-frequency and off-resonance proton-decoupling techniques, the chemical shifts of the carbon atoms of indole and its seven-monomethyl derivatives have been measured and assigned. There has been little general interest in the N magnetic resonance studies, owing to rapid quadrupole relaxation, even though quadrupole line broadening can be minimized by the use of low viscosity solvents." @default.
- W349289341 created "2016-06-24" @default.
- W349289341 creator A5014716492 @default.
- W349289341 creator A5038694369 @default.
- W349289341 date "1973-01-01" @default.
- W349289341 modified "2023-09-27" @default.
- W349289341 title "Applications of Nuclear Magnetic Resonance Spectroscopy to Heterocyclic Chemistry: Indole and Its Derivatives" @default.
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