Hydrochloric Acid → 5-Nitronaphthalene-1,4-dione

Participants

Reaction Conditions

Reaction Steps

5.5 g of 8-nitro-1,4-naphthoquinone-1-oxime are suspended in 450 ml of 38 percent by weight aqueous hydrochloric acid, followed by heating to 33°C. 61 g (0.22 mol) of iron (II) sulphate heptahydrate are then introduced in portions with stirring. After 1.5 hours, the reaction mixture is poured into 1000 ml of water heated to approximately 50°C, followed by stirring for 1 hour at that temperature. The reaction product precipitated is filtered off under suction, washed with water until neutral and dried at approximately 50°C. The yield amounts to 4 g (78 percent of the theoretical yield) of 5-nitro-1,4-naphthoquinone melting at 160°C.

Provenance & Evidence