New type of 1D coordination polymeric anions [(MCl₃M₁Cl₃)²⁻]_n (M = Rh, Ru; M₁ = Na, K). Crystal structure and IR characterization of Rh(III) and Ru(III) hexachlor

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• 作者：Marek Zuber ; Zbigniew Ciunik
• 关键词：Hexachlororhodate ; Hexachlororuthenate ; 2-Amino-6-methylpyridinium ion ; X-ray structure
• 刊名：Polyhedron
• 出版年：2007
• 期刊代码：87_02775387
• 类别：ch
• 出版时间：21 May 2007
• 卷：26
• 期：8
• 页码：1643-1648
• 文件大小：560 K

摘要

Crystals of sodium bis(2-amino-6-methyl-pyridinium) hexachlororhodium(III) (1) and potassium bis(2-amino-6-methyl-pyridinium) hexachlororuthenium(III) (2) have been prepared in the reaction of MCl₃ · xH₂O (M = Rh, Ru) with 2-amino-6-methyl pyridine in the presence of M₁Cl (M₁ = Na or K) in the water solution of HCl. They crystallize in the triclinic space group , and are isostructural. The cations of metals form infinite chains of [MCl₆]–[M₁Cl₆] octahedra which are achieved by means of six bridging chloride atoms. The chains are interconnected through bifurcated hydrogen bonds established between the NH⁺ and NH₂ groups of the 2-amino-6-methyl-pyridinium cations as well as via C–HCl type contacts. The aromatic rings of the organic cations form stacks involving π–π interactions, parallel to the infinite [(MCl₃M₁Cl₃)²⁻]_n chains.