Linear one-dimensional coordination polymers constructed by dirhodium paddlewheel and tetracyanido-metallate building blocks

Abstract

In this article, we describe the preparation of anionic heteronuclear one-dimensional coordination polymers made by dirhodium paddlewheels and tetracyanido-metallatate building blocks. A series of complexes of (PPh4)2n [{Rh2 (µ-O2 CCH3)4 }{M(CN)4 }]n (M = Ni (1), Pd (2), Pt (3)) formulae were obtained by reaction of [Rh2 (µ-O2 CCH3)4] with (PPh4)2 [M(CN)4] in a 1:1 or 2:1 ratio. Crystals of 1−3 suitable for single crystal X-ray diffraction were grown by slow diffusion of a dichloromethane solution of the dirhodium complex into a chloroform solution of the corresponding tetracyanido–metallatate salt. Compounds 1 and 2 are isostructural and crystallize in the triclinic P-1 space group, while compound 3 crystallizes in the monoclinic P21 /n space group. A detailed description of the structures is presented, including the analysis of the packing of anionic chains and PPh4+ cations.