Serveur d'exploration sur le cobalt au Maghreb

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Dicobalt(II) lead(II) hydrogenphos­phate(V) phos­phate(V) hydroxide monohydrate

Identifieur interne : 000028 ( Maroc/Analysis ); précédent : 000027; suivant : 000029

Dicobalt(II) lead(II) hydrogenphos­phate(V) phos­phate(V) hydroxide monohydrate

Auteurs : Abderrazzak Assani [Maroc] ; Mohamed Saadi [Maroc] ; Mohammed Zriouil [Maroc] ; Lahcen El Ammari [Maroc]

Source :

RBID : PMC:3344284

Abstract

The title compound, Co2Pb(HPO4)(PO4)OH·H2O, which was synthesized under hydro­thermal conditions, crystallizes in a new structure type. Except for two O atoms in general positions and two Co atoms on centres of symmetry, all other atoms in the asymmetric unit (1 Pb, 2 Co, 2 P, 8 O and 4 H) are located on mirror planes. The structure is built up from two infinite linear chains, viz.1[CoO2/1(H2O)2/2O2/2] and 1[CoO2/1(OH)2/2O2/2], of edge-sharing CoO6 octa­hedra running along [010]. Adjacent chains are linked to each other through PO4 and PO3(OH) tetra­hedra, leading to the formation of layers parallel to (100). The three-dimensional framework is formed by stacking along [100] of adjacent layers that are held together by distorted PbO8 polyhedra. Hydrogen bonds of the type O—H⋯O involving the water mol­ecule are very strong, while those O atoms involving the OH groups form weak bifurcated and trifurcated hydrogen bonds.


Url:
DOI: 10.1107/S1600536812014870
PubMed: 22590050
PubMed Central: 3344284


Affiliations:


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PMC:3344284

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<p>The title compound, Co
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Pb(HPO
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)(PO
<sub>4</sub>
)OH·H
<sub>2</sub>
O, which was synthesized under hydro­thermal conditions, crystallizes in a new structure type. Except for two O atoms in general positions and two Co atoms on centres of symmetry, all other atoms in the asymmetric unit (1 Pb, 2 Co, 2 P, 8 O and 4 H) are located on mirror planes. The structure is built up from two infinite linear chains,
<italic>viz.</italic>
<sup>1</sup>
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[CoO
<sub>2/1</sub>
(H
<sub>2</sub>
O)
<sub>2/2</sub>
O
<sub>2/2</sub>
] and
<sup>1</sup>
<sub></sub>
[CoO
<sub>2/1</sub>
(OH)
<sub>2/2</sub>
O
<sub>2/2</sub>
], of edge-sharing CoO
<sub>6</sub>
octa­hedra running along [010]. Adjacent chains are linked to each other through PO
<sub>4</sub>
and PO
<sub>3</sub>
(OH) tetra­hedra, leading to the formation of layers parallel to (100). The three-dimensional framework is formed by stacking along [100] of adjacent layers that are held together by distorted PbO
<sub>8</sub>
polyhedra. Hydrogen bonds of the type O—H⋯O involving the water mol­ecule are very strong, while those O atoms involving the OH groups form weak bifurcated and trifurcated hydrogen bonds.</p>
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