Hydrogen-bonding Studies of Pyridine and o-Phenylphenol with Coal Asphaltenes by Multi-nuclei Magnetic Resonance

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Proton, carbon, and nitrogen-14 nuclear magnetic resonance studies are reported of hydrogen bonding between the OH proton of o-phenylphenol (OPP) and the nitrogen electron donor of pyridine (Py). Data are also reported on the hydrogen bonding of the acid and base components of coal-derived asphaltenes with the model system. Determination was made of the equilibrium constant of the 1:1 complex between OPP and Py from the proton NMR studies. Qualitative results are reported from the 13C and 14N studies of the model system (OPP-Py) with the individual asphaltene fractions. Because of the recent renewed interest in coal liquefaction this investigation may provide a starting point for future research.

Keywords: Instrumentation, NMR; Molecular structure, NMR; Techniques, spectroscopic

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370276774457227

Affiliations: U.S. Energy Research Development Administration, Pittsburgh Energy Research Center, 4800 Forbes Avenue, Pittsburgh, Pennsylvania 15213

Publication date: May 1, 1976

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