Wielandt, J. WolframPetrie, SimonKilah, Nathan L.Willis, Anthony C.Dewhurst, Rian D.Belaj, FerdinandOrthaber, AndreasStranger, RobertWild, S. Bruce2017-02-142017-02-140004-9425http://hdl.handle.net/1885/112348Square-planar halide complexes in which four trimethylphosphine-stabilized diphenyl-stibenium or-bismuthenium ions surround a central halide ion in discrete centrosymmetrical structures of C₄h symmetry have been isolated and their structures determined by X-ray crystallography. The structures are stabilized by electrostatic interactions between the halide ion and four positively charged trimethylphosphine-stabilized diphenyl-stibenium or-bismuthenium ions, as well as four edge-to-face phenyl-phenyl embraces above and below the plane containing the nine main group elements. The parent halide-free trimethylphosphine-stabilized diphenyl-arsenium,-stibenium, and-bismuthenium hexaflurophosphate complexes have also been prepared and structurally characterized.RS and SBW gratefully acknowledge the Australian Research Council for financial support.application/pdf© CSIRO 20162016-01-2810.1071/CH15701