Lead heptaphosphide is the only binary phosphide currently known to be formed by lead and phosphorus. The chemical formula is PbP7, which contains [P7]2− atom clusters. This compound is stable in the air.[1]
| Identifiers | |
|---|---|
| Properties | |
| PbP7 | |
| Molar mass | 424.03 |
| Appearance | black solid |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
Preparation
editLead heptaphosphide can be produced by the reaction of red phosphorus and lead:
- 7 P4 + 4 Pb → 4 PbP7
It decomposes again into the elements at 550 K (277 °C).[2]
Properties
editLead heptaphosphide crystallises in the monoclinic crystal system, with space group P21/c, a=970.70(11), b=673.34(10), c=1243.89(18) pm and β=122.55(1)°. Each phosphorus atom in the phosphorus cluster is connected to the other six.
References
edit- ^ Schäfer, Konrad; Benndorf, Christopher; Eckert, Hellmut; Pöttgen, Rainer (2014-06-27). "PbP7– a polyphosphide with a three-dimensional [P7]2−network of condensed and P-bridged P6hexagons". Dalton Transactions. 43 (33): 12706–12710. doi:10.1039/c4dt01539h. ISSN 1477-9226. PMID 25010209.
- ^ Christopher Benndorf, Andrea Hohmann, Peer Schmidt, Hellmut Eckert, Dirk Johrendt, Konrad Schäfer, Rainer Pöttgen (Mar 2016). "2D 31 P solid state NMR spectroscopy, electronic structure and thermochemistry of PbP 7". Journal of Solid State Chemistry. 235: 139–144. doi:10.1016/j.jssc.2015.12.028. Archived from the original on 2019-06-02. Retrieved 2019-05-28.
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