Monoammonium Trimetaphosphimate (NH<sub>4</sub>)H<sub>2</sub>(PO<sub>2</sub>NH)<sub>3</sub>
oleh: Daniel Günther, Carsten Paulmann, Oliver Oeckler
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2023-01-01 |
Deskripsi
Trimetaphosphimates show a rich structural variability in both cation coordination and anion arrangement. They are precursors for crystalline, as well as amorphous oxonitridophosphates. The ammonium trimetaphosphimate (NH<sub>4</sub>)H<sub>2</sub>(PO<sub>2</sub>NH)<sub>3</sub> is formed during the decomposition of the corresponding acid in solution. The monoclinic crystal structure of the monoammonium salt was elucidated by single crystal X-ray diffraction using synchrotron radiation. The trimetaphosphimate monoanions exhibit a twist conformation and form crankshaft-like stacks along [100], which have so far only been observed in (NH<sub>4</sub>)<sub>3</sub>(PO<sub>2</sub>NH)<sub>3</sub>·H<sub>2</sub>O and Ag<sub>3</sub>(PO<sub>2</sub>NH)<sub>3</sub>. (NH<sub>4</sub>)H<sub>2</sub>(PO<sub>2</sub>NH)<sub>3</sub> decomposes at 170 °C, forming a poorly crystalline phase. Therefore, it is a model system and possible precursor for the synthesis of oxonitridophosphates.