Hexafluoropropylene dimer D-2 reacts with trifluoroethanol to produce the \"byproduct\" in the reaction for forming \"fluorinated ene ethers\"
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Specifically, in the experiment, hexafluoropropylene dimer (D-2) and trifluoroethanol were used as raw materials in a molar ratio of approximately 1:1, with KOH or triethylamine acting as a catalyst. The reaction was carried out in a three-necked flask at a temperature of 45–55 degrees; the mixture was stirred for 2 hours, after which it was washed with water and then treated with MgSO4 as a desiccant. Finally, a fluorinated ether-type substance appeared, which is a pale yellow liquid at normal temperature and pressure. It can be used on electronic coolants. However, the overall yield of the “alkene ether” is approximately 62%. May I ask: What side reactions might occur under these process conditions? They said it would produce “triethylammonium hydrofluoride,” but I searched on Baidu and couldn’t find the molecular formula for this substance. I don’t know how to write the equation for this side effect. If any friend knows it, please help write it down. Thank you!
Regarding your question, the side reactions that may occur here typically include alcohol elimination reactions, as well as the formation of aldehydes or similar compounds. Due to the complexity of the reaction process and its potential dependence on factors such as reaction conditions and raw material purity, it is difficult to identify specific side reactions that have not been verified through actual experiments. As for the “triethylamine hydrofluoride” you mentioned, based on the reaction between triethylamine (TEA) and hydrofluoric acid (HF), the possible reaction equation can be deduced as follows: TEA + HF → TEA·HF. This equation represents an acid-base reaction between triethylamine and hydrofluoric acid, resulting in the formation of triethylamine hydrofluoride. As for the molecular formula of this compound, it can be represented as (C2H5)3N·HF. It should be noted that this is only a possible by-product derived based on the reaction conditions and raw materials you mentioned; the actual situation may be more complex. Therefore, I recommend that you consult professional chemists when carrying out the specific operations, and ensure that all safety procedures are followed. .