University of Sussex

File(s) not publicly available

Synthesis and theoretical studies on rare three-coordinate lead complexes

journal contribution
posted on 2023-06-08, 00:36 authored by Matthew Chen, J Robin Fulton, Peter B Hitchcock, Nick C Johnstone, Andrey V Protchenko, Michael F Lappert
A series of ß-diketiminate lead halide complexes has been synthesised LPbCl (2), LPbBr (3) and LPbI (4) (L = {N(2,6-iPr2C6H3)C(Me)}2CH]), which includes a rare example of a three-coordinate lead iodide (4). The chloride and bromide complexes, 2 and 3, are relatively stable in both the solid and solution states, only slowly decomposing to elemental lead over the course of a month in solution, the lead iodide 4 appears to be less stable and decomposes after 3 d in the solid state at ambient temperatures. The lead chloride complex 2 was treated with KN(SiMe3)2 to yield an unusual terminal lead amide complex LPbN(SiMe3)2 (5). Unlike three-coordinate ß-diketiminate transition metal¿halide complexes, the ligands are present in a pyramidal arrangement around the lead centre, commonly attributed to the presence of a stereochemically active lone pair. We have investigated the influence of this lone pair on the geometry of the metal halide complexes 2¿4, as well as the isostructural germanium and tin complexes (6 and 7, respectively) using DFT calculations. The lone pair in the lead complexes is significantly more diffuse than in the tin and germanium analogues and only a small amount of hybridisation between the 6s and 6p orbitals is observed.


Publication status

  • Published


Dalton Transactions







Page range

2770 - 2778



Department affiliated with

  • Chemistry Publications


This is a comprehensive study into the structural stability of 3-coordinate lead halide complexes, including a theoretical investigation into the influence of the lone pair on the structure of the complexes. JRF supervised the work and is corresponding author

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date


Usage metrics

    University of Sussex (Publications)


    No categories selected