Sodium or potassium metal reduction of pyrene in tetrahydrofuran is shown to yield the paratropic, D2h symmetric dianion and minor amounts of the 1-hydropyrenyl monoanion; the latter compounds affords n.m.r. data that earlier had been incorrectly assigned to an unsymmetrical dianion or tetra-anion.
B. Eliasson, T. Lejon and U. Edlund, J. Chem. Soc., Chem. Commun., 1984, 591 DOI: 10.1039/C39840000591
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