Lead heptaphosphide

Lead heptaphosphide
Identifiers
3D model (JSmol)
  • InChI=1S/P7.Pb/c1-7-5-3-2-4-6-7;/q-2;+2
    Key: PYNHPNWNMKXJRJ-UHFFFAOYSA-N
  • [Pb+2].[P-2][P]1[P][P][P][P][P]1
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).

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.

Preparation

Lead 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).

Properties

Lead 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

  1. ↑ 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.
  2. ↑ 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 PbP7". 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.{{cite journal}}: CS1 maint: multiple names: authors list (link)