Add time:07/28/2019         Source:sciencedirect.com

The reactions of K[Pt(R2SO)X3] with R′CN in water, substitution of acetonitrile in cis-[Pt(MeCN)2Cl2] for sulfoxides and the bridge-cleavage reactions of [Pt(R2SO)(μ-Cl)Cl]2 with R′CN lead to isolation of cis-[Pt(R2SO)(R′CN)X2] (R=Me, R′=Me, X=Cl, Br; R=Et, Ph, R′=Me, X=Cl; R=Me, R′ =CH2Ph, CH2CO2Et, Ph, X=Cl). The reaction of [Pd(MeCN)2Cl2] with Me2SO in acetone followed by removal of the solvent results in isolation of the solid [Pd(Me2SO)(μ-Cl)Cl]2. Ligands R′CN in cis-[Pt(R2SO)(R′CN)X2] rapidly abstracted on heating in the solid phase or in solution producing halogen-bridged compounds [Pt(R2SO)(μ-X)X]2. The structure of the complex [Pt(Et2SO)(μ-Cl)Cl]2 was determined by X-ray analysis. The compound crystallizes in the P21/b space group. The unit cell dimensions are a = 5.925(1), b = 11.175(2), c = 14.195(3) Å, γ = 98.79°, V = 928.8(3) Å3, Z = 2. A comparison of PtCl bond lengths in the molecule [Pt(Et2SO)(μ — Cl)Cl]2 suggests that the trans- influence of diethyl sulfoxide is higher than that of the chloride ion.

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