Treatment of phenanthrene-9,10-dione (PQ) with phenanthrene-9,10-diol (PQH2), as prepared by catalytic hydrogenation of PQ, in toluene solution or in the solid state afforded crystalline −9,10-phenanthrenequinhydrone× (PQH), the first example of an ortho-quinhydrone. PQH was characterized by analytical and spectroscopic methods, including X-ray and CP/MAS 13C-NMR analyses. The crystal structure of PQH showed pairs of planar molecules linked by H-bonds and organized in columns parallel to the crystallographic axis a. The solid-state structure of PQH was compared with those of the parent compounds, PQ and PQH2 , the latter being reported for the first time. PQH was found to be stable in the solid state only, the components PQ and PQH2 being formed upon dissolution in media of even low polarity such as toluene.

The reaction of 9,10-phenanthrenequinone with 9,10-dihydroxyphenanthrene. Synthesis and characterization of the first example of an ortho-quinhydrone derivative

CALDERAZZO, FAUSTO;MARCHETTI, FABIO;PAMPALONI, GUIDO;
2004

Abstract

Treatment of phenanthrene-9,10-dione (PQ) with phenanthrene-9,10-diol (PQH2), as prepared by catalytic hydrogenation of PQ, in toluene solution or in the solid state afforded crystalline −9,10-phenanthrenequinhydrone× (PQH), the first example of an ortho-quinhydrone. PQH was characterized by analytical and spectroscopic methods, including X-ray and CP/MAS 13C-NMR analyses. The crystal structure of PQH showed pairs of planar molecules linked by H-bonds and organized in columns parallel to the crystallographic axis a. The solid-state structure of PQH was compared with those of the parent compounds, PQ and PQH2 , the latter being reported for the first time. PQH was found to be stable in the solid state only, the components PQ and PQH2 being formed upon dissolution in media of even low polarity such as toluene.
Calderazzo, Fausto; C., Forte; Marchetti, Fabio; Pampaloni, Guido; L., Pieretti
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/199548
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