- In a 500-ml round-bottomed flask, provided with a reflux condenser protected by a calcium chloride drying tube, place 59g (0.5 mol) of succinic acid and 102g (94.5 ml, 1 mol) of redistilled acetic anhydride.
- Reflux the mixture gently on a water bath with occasional shaking until a clear solution is obtained (c. 1 hour), and then for a further hour to ensure the completeness of the reaction.
- Remove the complete assembly from the water bath, allow it to cool (observe the formation of crystals) and finally cool in ice.
- Collect the succinic anhydride on a Buchner funnel or a sintered glass funnel, wash it with two 40 ml portions of anhydrous ether and dry in a vacuum desiccator.The yield is 45 g (90%), m.p. 1 19-120 °C.
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