Synthesis of Ammonium- and 4-Dimethylaminopyridinium Amidofluorophosphates and Crystal Structure of [DMAPH][PO2F(NH2)]

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Authors

SLUKA Radek VAVŘÍKOVÁ Karla ŽÁK Zdirad ČERNÍK Miloš

Year of publication 2003
Type Article in Periodical
Magazine / Source Z. anorg. allg. Chem.
MU Faculty or unit

Faculty of Science

Citation
Field Inorganic chemistry
Keywords Synthesis of Ammonium- and 4-Dimethylaminopyridium Amidofluorophosphates
Description NH4[PO2F(NH2)] has been prepared by the reaction of betaine py.PO2F with excess of ammonia in acetonitrile solution, while the ammonolysis of DMAP.PO2F with stechiometric amount of NH3 yields [DMAPH][PO2F(NH2)]. The crystal structure of the latter was determined by X-ray single-crystal structure analysis, which revealed that the anions [PO2F(NH2)]- are linked to infinite chains by double NH...O bridges. Additional strong N-H...O bridge bonds connect each anion with its [DMAPH]+ counterion. The formation of a new betaine NH3.PO2F in the solution of py.PO2F in liquid ammonia was proved by 31P NMR spectroscopy and by identification of its hydrolysis products.
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