PARTITION BETWEEN α-METHYL AND α-METHYLENE PROTONS IN 1H NMR SPECTRA OF COAL TARS

PARTITION BETWEEN α-METHYL AND α-METHYLENE PROTONS IN 1H NMR SPECTRA OF COAL TARS

ABSTRACT Cut-off points between protons in a-methyl and or-methylene groups were proposed for the evaluation of 'H NMR spectra of coal tars. The position of the cut-off points depended on the proton aromaticity and related structural features of the samples. Equations for the calculation of the...

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Veröffentlicht in:Fuel science & technology international 1994-01, Vol.12 (10), p.1377-1385
Hauptverfasser: CERNY, J, PAVLIKOVA, H
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
By products of carbonization
Coal and derived products
Energy
Exact sciences and technology
Fuels
Processing
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Zusammenfassung:ABSTRACT Cut-off points between protons in a-methyl and or-methylene groups were proposed for the evaluation of 'H NMR spectra of coal tars. The position of the cut-off points depended on the proton aromaticity and related structural features of the samples. Equations for the calculation of the cut-off points as a function of proton and carbon aromaticity, and atomic H/C ratio were proposed for the range of proton aromaticity between 0.2 and 0.6.
ISSN:0884-3759
DOI:10.1080/08843759408916240