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4 pages, 2 figures, 1 table, 15 references.Solid-state 15N NMR is applied in a study of various coal samples to evaluate the forms of\udnitrogen in coal. The spectra display the main signal intensities in the region of pyrrole and\udindole derivatives. No signals assigned to pyridine derivatives were identified. This contradicts\udthe most common belief that pyridine-like structures comprise the major form of nitrogen in coal. The successful application of 15N NMR spectroscopy to coal samples may help to provide a\udnew level of understanding of coal-nitrogen chemistry.Financial support\udwas provided by the U.S. Department of Energy under\udCooperative Agreement DE-FC22-92PC92162.Peer reviewe

Solid-State 15N NMR Spectroscopy of Coal