Method and procedure:
Into a 5 ml conical vial, 1.0 ml of mixed 1:1 sulfuric acid and nitric acid was added. 0.50 g of finely divided naphthalene was added in small portions to the solution while stirring after each addition, and cooling to keep the temperature around 45-50 C. The reaction mixture was then stirred in a 60°C water bath for 20 minutes after the addition of naphthalene
When the reaction cooled to room temperature, the solution was transferred to a beaker containing 25ml of ice-cold was with stirring Yellow crystals are allowed to form, and then the liquid content is removed with filter-tip pipet. The solid was then boiled with 10ml of fresh water for 10minutes.
The mixture was cooled in ice and the product was collected by vacuum filteration 0 1 of the crude product was then recrystallized for 5 minutes with 5ml of hexane under reflux. The hot solution was filtered using a preheated filtering paper. Crystallization occurred, and then the product was collect by vacuum filteration, Th product was dried and the melting and mass were measured of the product, nitronaphthalene.