Tetroxide).-meso-1,2-Dinitro-1,2-diphenylethane (I, 0.1 g., m.p. 225°u ncor.) was stirred for 8 hours in ethyl ether (200 ml.) at 0°c ontaining excess dinitrogen tetroxide. After the mixture had been poured on ice, allowed to stand, washed with water, dried over magnesium sulfate and evaporated.Compound I was recovered essentially quantitatively, m.p. 220-225°; the product was colored by trace amounts of anitrostilbene.
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