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Synthesis of Dipotassium Difluorodiphosphate by Thermal Reaction of Tetraphosphorus Decaoxide with Potassium Fluoride

✍ Scribed by Priv.-Doz. Dr. H. Falius

Publisher
John Wiley and Sons
Year
1968
Tongue
English
Weight
122 KB
Volume
7
Category
Article
ISSN
0044-8249

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✦ Synopsis

The IR spectra of compounds ( ) and ( 6 ) contain pronounced bands at 2260 cm-1, 1640 cm-1, and 1770 cm-1, which indicate the presence of N=C=O, C=N, and a halogenoformyl group. The spectra show that compound (2a) exists wholly in the isocyanate form, but that (2d) exists almost wholly in the N-(chloroformyl) form. The other compounds exist as an equilibrium mixture of the isocyanate and the N-(halogenoformyl) form. Triethylamine shifts the equilibrium towards the isocyanate form.

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## Abstract Qualitative limitations were presented for a formation reaction of a series of bridged compounds from ketones and malononitrile catalyzed with potassium fluoride‐alumina in acetonitrile [1]. The bridged com pounds were obtained from only unhindered alkyl methyl ketones. The compounds re