The reaction of a strongly basic phosphazene (Schwesinger base) with water afforded the corresponding metastable hydroxide trihydrate [OH(OH2 )3 ]- salt. This is the first hydroxide solvate that is not in contact with a cation and furthermore one of rare known water-stabilized hydroxide anions. Thermolysis in vacuum results in the decomposition of the hydroxide salt and quantitative liberation of the free phosphazene base. This approach was used to synthesize the Schwesinger base from its hydrochloride salt after anion exchange in excellent yields of over 97 %. This deprotonation method can also be used for the phosphazene-base-catalyzed preparation of the Ruppert-Prakash reagent Me3 SiCF3 using fluoroform (HCF3 ) as the trifluoromethyl building block and sodium hydroxide as the formal deprotonation agent.

中文翻译：

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弱配位阳离子稳定的三水合氢氧根阴离子[OH（OH2）3]-的产生和应用。

强碱性磷腈（Schwesinger碱）与水反应，得到相应的亚稳氢氧化物三水合物[OH（OH2）3]-盐。这是第一个不与阳离子接触的氢氧化物溶剂化物，而且是稀有的水稳定的氢氧根阴离子。真空中的热解导致氢氧化物盐的分解和游离磷腈碱的定量释放。此方法用于阴离子交换后从其盐酸盐合成Schwesinger碱，产率高达97％以上。该去质子方法也可用于使用氟仿（HCF3）作为三氟甲基结构单元和氢氧化钠作为正式去质子化剂的磷腈基催化的Ruppert-Prakash试剂Me3 SiCF3的制备。