Determination of aromaticities of coal derivatives by nuclear magnetic resonance spectrometry and the Brown-Ladner equation

Autor:	M. Hough, H. L. Retcofsky, F. K. Schweighardt
Rok vydání:	1977
Předmět:	chemistry.chemical_classification Proton Carbon-13 Analytical chemistry chemistry.chemical_element Coal liquefaction Analytical Chemistry NMR spectra database chemistry Proton NMR Compounds of carbon Energy source Carbon Nuclear chemistry
Zdroj:	Analytical Chemistry. 49:585-588
ISSN:	1520-6882 0003-2700
Popis:	The fraction of aromatic carbon (fac) was determined unambiguously from proton coupled carbon-13 NMR spectra of materials derived from coal, such as coal extracts and SYNTHOIL. Only the carbon disulfide-soluble portion of each material was examined. The fac's measured in this way were compared with estimated values based on proton NMR data. The largest difference between fac values determined by the two methods was 0.07, suggesting that published values based on the older proton NMR method are reasonably reliable, at least for materials similar to those of the present study. The differences are rationalized in terms of the various aliphatic structures present in the materials.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3b5da243e2e404a171c5c9cd3f2d23de https://doi.org/10.1021/ac50012a020 Zobrazit plný text záznamu