| 摘要 |
A method of producing an anhydrous niobium or tantalum pentafluoride involvi ng reacting the corresponding pentoxide or oxyhalide with an excess of anhydrous hydrogen fluoride in the presence o f a sufficient dehydrating agent (e.g,, COCI2, SOC12 or SO~C12) to react with any water formed. Such a process is useful to produ ce a catalytically active anhydrous niobium or tantalum pentafluoride in essentially a single liquid phase reaction step.</ SDOAB>
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