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Difluorophosphate or difluorodioxophosphate or phosphorodifluoridate is an anion with formula PO2F2−. It has a single negative charge and resembles perchlorate (ClO4−) and monofluorosulfonate (SO3F−) in shape and compounds.〔 These ions are isoelectronic, along with tetrafluoroaluminate.〔〔 It forms a series of compounds. The ion is toxic to mammals as it causes blockage to iodine uptake in the thyroid. However it is degraded in the body over several hours.〔 Compounds containing difluorophosphate may have it as a simple uninegative ion, it may function as a difluorophosphato ligand where it is covalently bound to one or two metal atoms, or go on to form a networked solid. It may be covalently bound to a non metal or an organic moiety to make an ester or an amide. ==Formation== The ammonium salt of difluorophosphate is formed from reacting phosphorus pentoxide with ammonium fluoride. This was how the ion was first made by its discoverer, Willy Lange, in 1929. Alkali chlorides can react with dry difluorophosphoric acid to form alkali metal salts. NaCl + HPO2F2 → NaPO2F2 + HCl (gas) Fluorination of dichlorophosphates can produce difluorophosphates.〔 Another method is fluorination of phosphates or polyphosphates.〔 Trimethylsilyl difluorophosphate reacts with metal chlorides to make difluorophosphates. The anhydride phosphoryl difluoride oxide (P2O3F4) can react with oxides such as UO3 to yield difuorophosphates. Phosphoryl difluoride oxide also reacts with alkali fluorides to yield difluorophosphates. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Difluorophosphate」の詳細全文を読む スポンサード リンク
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