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Proton NMR protons

Distribution of protons by type and overall aromatic/aliphatic proton ratios for the original fractions and bottoms products, as determined by proton nmr. Proton distribution for fraction D and the whole coal are not included as these materials were only partly soluble and the resultant spectra were not representative of the whole material. [Pg.250]

Quinoxaline has a more complex proton NMR. Protons 2 and 3 appear as a singlet at 8.54 ppm. The multiplet at 7.54-7.84 comes from protons 5 and 8, while protons 6 and 7 account for the multiplet peaks between 7.42-7.45 ppm. The carbon NMR can be separated into two regions. The carbons bonded to the nitrogen are located at 144.6 and 142.6... [Pg.536]


See other pages where Proton NMR protons is mentioned: [Pg.164]    [Pg.164]    [Pg.172]   


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