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I want to make oleic acid anhydride with phosphor pentaoxide. What could be a good starting point for the amount of each reagent?
Accepted Answer
Oleic acid anhydride synthesis with phosphorus pentoxide (P₂O₅) is a common method. However, it's important to note that P₂O₅ is a strong dehydrating agent, and the reaction needs to be carefully controlled to avoid unwanted side reactions. A good starting point for the molar ratio is 2 moles of oleic acid to 1 mole of P₂O₅. This should allow for the formation of the anhydride while minimizing the formation of other byproducts. Always remember to conduct the reaction under inert conditions, such as under nitrogen, and use appropriate safety precautions as P₂O₅ is hygroscopic and reacts violently with water.
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