Cobaltic acetate can be synthesized by the oxidation of cobaltous acetate in acetic acid. Are there any satisfactory isolation methods to obtain pure cobaltic acetate?
Preparation of Cobalt(III) Acetate. The equipment consisted of a four-necked flask fitted with a gas bubbler, condenser, thermometer, addition funnel, and stirrer. The flask was charged with 150 g of Co(OAc)2*4H2O, 1 L of glacial acetic acid, and 25 ml of water. Oxygen was bubbled through the solution at a rate of 0.5 L./min. The solution was heated to 90C and 500 ml of 2 butanone was then added dropwise over a period of 30 min. The temperature was maintained for an additional 30 min after which the
reaction mixture was cooled to room temperature. The solution was evaporated at 35-40C on a rotary evaporator at a pressure of about 4 mm. The solid obtained was dried in a vacuum desiccator over P2O yield 143 g. The conversion to cobalt(III) as determined by iodometric titration was 55 %.
to cite: J. Am. Chem. Soc., 1969, 91 (24), pp 6830–6837
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