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

Abstract

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