Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
The Synthesis and Thermal Behavior of Barium Bis(hydrogenphosphoramidate) and Barium Phosphoramidate
Shoji SatoMakoto Watanabe
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1985 Volume 58 Issue 12 Pages 3513-3517


Barium bis(hydrogenphosphoramidate) monohydrate and barium phosphoramidate monohydrate were made by mixing a solution of potassium hydrogenphosphoramidate and a solution of barium chloride at pH 6.1–6.4 and 10.0–10.5 respectively. Both products were stable at room temperature. Barium bis(hydrogenphosphoramidate) monohydrate was decomposed by water to produce the orthophosphate. This was condensed to make polyphosphates above 100 °C and finally formed barium metaphosphate above 500 °C. The thermal products of the hydrogenphosphoramidate did not produce any phosphate with imino groups. Barium phosphoramidate produced ortho-, di-, imidodi-, and triphosphates when it was heated above 200 °C. These thermal products were converted to dibarium diphosphate in air above 500 °C.

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