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A new crystal modification of diammonium hydrogen phosphate, (NH4)(2)(HPO4)
- Source :
- Acta Crystallographica Section E: Structure Reports, Acta Crystallographica Section E, Vol 66, Iss 4, Pp i26-i27 (2010)
- Publication Year :
- 2010
- Publisher :
- Wiley-Blackwell, 2010.
-
Abstract
- The addition of hexafluoridophosphate salts (ammonium, silver, thallium or potassium) is usually used to precipitate complex cations from aqueous solutions. It has long been known that PF6− is sensitive towards hydrolysis under acidic conditions [Gebala & Jones (1969). J. Inorg. Nucl. Chem. 31, 771–776; Plakhotnyk et al. (2005). J. Fluorine Chem. 126, 27–31]. During the course of our investigation into coinage metal complexes of diphosphine ligands, we used ammonium hexafluoridophosphate in order to crystallize [Ag(diphosphine)2]PF6 complexes. From these solutions we always obtained needle-like crystals which turned out to be the title compound, 2NH4+·HPO42−. It was received as the hydrolysis product of NH4PF6. The crystals are a new modification of diammonium hydrogen phosphate. In contrast to the previously published polymorph [Khan et al. (1972). Acta Cryst. B28, 2065–2069], Z′ of the title compound is 2. In the new modification of the title compound, there are eight molecules of (NH4)2(HPO4) in the unit cell. The structure consists of PO3OH and NH4 tetrahedra, held together by O—H...O and N—H...O hydrogen bonds.
- Subjects :
- 10120 Department of Chemistry
3104 Condensed Matter Physics
Potassium
Mineralogy
chemistry.chemical_element
1600 General Chemistry
Medicinal chemistry
Inorganic Papers
Metal
Crystal
Hydrolysis
chemistry.chemical_compound
540 Chemistry
General Materials Science
Ammonium
Aqueous solution
Crystallography
Hydrogen bond
Chemistry
General Chemistry
Condensed Matter Physics
2500 General Materials Science
QD901-999
visual_art
visual_art.visual_art_medium
Fluorine
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Acta Crystallographica Section E: Structure Reports, Acta Crystallographica Section E, Vol 66, Iss 4, Pp i26-i27 (2010)
- Accession number :
- edsair.doi.dedup.....934518d8758a91a0d52aea9109d17c2b
- Full Text :
- https://doi.org/10.5167/uzh-44992