Tetrahedral cage complex with planar vertices: selective synthesis of Pt4L6 cage complexes involving hydrogen bonds driven by halide binding.

The reaction of Fe(η-C5H4NHC(O)PPh2)2 () with PtX2(PPh3)2 selectively formed cage-shaped complexes formulated as [(PtX)4()6]X4·CHCl3 (X = Cl, Br), in which the four square-planar Pt fragments were situated at each vertex and the six s were located in each side of a tetrahedral framework and hydrogen bonds existed between the NH groups in s and X(-) ions inside the cage.