V. Sharutin, O. Sharutina, A. Efremov
Sep 1, 2020
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Journal
Russian Journal of Coordination Chemistry
Abstract
Red-colored crystalline gold complexes [p-Tol4Sb][Au(CN)2I2] (I), [Ph3PMe][Au(CN)2I2] (II), and [Ph3PCH2CN][Au(CN)2I2] (III) were synthesized by the reaction of potassium dicyanodiiodoaurate with tetra(para-tolyl)antimony and alkyltriphenylphosphonium halides in water. The structure of the complexes was established by IR and NMR spectroscopy and X-ray diffraction. The tetra(para-tolyl)antimony and alkyltriphenylphosphonium cations have a distorted tetrahedral coordination. The dicyanodiiodoaurate anions have a planar structure with a square coordination of the gold atom. The formation of the 3D crystal network is due to weak CN⋅⋅⋅H−C hydrogen bonds between cations and anions (2.39, 2.59 Å (I), 2.70, 2.48, 2.52, 2.68 Å (II), 2.73, 2.50, 2.67, 2.44 Å (III)). In complex III, anions of one of the two types interact with one another via I⋅⋅⋅I contacts to give 1D ladder-like chains along the crystallographic a axis.