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Nuclear magnetic resonance deshielding

Elucidation of the structure of the cycloadducts (3) by nuclear magnetic resonance is simplified by the strong deshielding effect of the positively... [Pg.291]

Tables 3-2 and 3-3 summarize the infrared and proton-NMR (nuclear magnetic resonance) spectroscopic properties of alcohols and ethers. In the proton NMR, the oxygen atom is deshielding. Phenols and alcohols rapidly exchange protons so their NMR spectra are solvent dependant. The alcohol and ether groups don t have any characteristics absorptions in UV-vis spectra. Tables 3-2 and 3-3 summarize the infrared and proton-NMR (nuclear magnetic resonance) spectroscopic properties of alcohols and ethers. In the proton NMR, the oxygen atom is deshielding. Phenols and alcohols rapidly exchange protons so their NMR spectra are solvent dependant. The alcohol and ether groups don t have any characteristics absorptions in UV-vis spectra.
Infrared spectroscopy helps to differentiate between primary and secondary amines. Nuclear magnetic resonance spectroscopy indicates the presence of nitrogen-bound hydrogens both hydrogen and carbon atoms are deshielded in the vicinity of the nitrogen. Mass spectra are... [Pg.972]

See other pages where Nuclear magnetic resonance deshielding is mentioned: [Pg.20]    [Pg.606]    [Pg.5]    [Pg.539]    [Pg.532]    [Pg.1630]    [Pg.492]    [Pg.617]    [Pg.485]    [Pg.1012]    [Pg.93]    [Pg.613]    [Pg.276]    [Pg.901]    [Pg.7]    [Pg.490]    [Pg.1252]    [Pg.223]    [Pg.154]    [Pg.25]    [Pg.155]    [Pg.44]    [Pg.28]    [Pg.611]    [Pg.182]    [Pg.7]    [Pg.22]    [Pg.771]    [Pg.888]    [Pg.532]    [Pg.137]    [Pg.211]    [Pg.3]    [Pg.56]    [Pg.232]    [Pg.720]    [Pg.78]    [Pg.948]   
See also in sourсe #XX -- [ Pg.228 ]



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