A new crystal modification of diammonium hydrogen phosphate, (NH4)2(HPO4)

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. I...

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Main Authors: Bernhard Spingler, Peter C. Kunz, Corinna Wetzel
Format: Article
Language:English
Published: International Union of Crystallography 2010-04-01
Series:Acta Crystallographica Section E
Online Access:http://scripts.iucr.org/cgi-bin/paper?S1600536810009839
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author Bernhard Spingler
Peter C. Kunz
Corinna Wetzel
author_facet Bernhard Spingler
Peter C. Kunz
Corinna Wetzel
author_sort Bernhard Spingler
collection DOAJ
description 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.
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spelling doaj.art-2dca74738aaa4f049b6b6e7a158172892022-12-21T19:46:00ZengInternational Union of CrystallographyActa Crystallographica Section E1600-53682010-04-01664i26i2710.1107/S1600536810009839A new crystal modification of diammonium hydrogen phosphate, (NH4)2(HPO4)Bernhard SpinglerPeter C. KunzCorinna WetzelThe 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.http://scripts.iucr.org/cgi-bin/paper?S1600536810009839
spellingShingle Bernhard Spingler
Peter C. Kunz
Corinna Wetzel
A new crystal modification of diammonium hydrogen phosphate, (NH4)2(HPO4)
Acta Crystallographica Section E
title A new crystal modification of diammonium hydrogen phosphate, (NH4)2(HPO4)
title_full A new crystal modification of diammonium hydrogen phosphate, (NH4)2(HPO4)
title_fullStr A new crystal modification of diammonium hydrogen phosphate, (NH4)2(HPO4)
title_full_unstemmed A new crystal modification of diammonium hydrogen phosphate, (NH4)2(HPO4)
title_short A new crystal modification of diammonium hydrogen phosphate, (NH4)2(HPO4)
title_sort new crystal modification of diammonium hydrogen phosphate nh4 2 hpo4
url http://scripts.iucr.org/cgi-bin/paper?S1600536810009839
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