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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Format: | Article |
Language: | English |
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International Union of Crystallography
2010-04-01
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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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issn | 1600-5368 |
language | English |
last_indexed | 2024-12-20T08:56:22Z |
publishDate | 2010-04-01 |
publisher | International Union of Crystallography |
record_format | Article |
series | Acta Crystallographica Section E |
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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