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Anion binding of a bis(pyridylcarbamate) receptor bearing a diethylene glycol spacer

机译:带有二甘醇间隔基的双(吡啶基氨基甲酸酯)受体的阴离子结合

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摘要

A flexible bis(pyridylcarbamate) receptor, 3-pyridyl-carbamic-acid-oxydi 1,2-ethanediylester (L~2) and the anion complexes (1 -3) of the doubly protonated ligand ([L~2H_2]~(2+)) with ClO_4~-,SO_4~(2-) and Cl~- are reported. The binding modes of [L~2H_2]~(2+) with the anions in 1-3 in the solid state are established by X-ray single crystal diffraction. Compounds 1 and 3 feature intriguing anionic polymer fashions. In compound 1, two zigzag perchlorate-water chains are encapsulated in the 1D channel constructed by 2+2 (2[L~2H_2]~(2+) + 2ClO_4~-) hydrogen-bonded macrocycles, while in 3 the chloride ions are trapped on the wall of the hydrogen-bonded 1D channel formed by two U-shaped ligands. For compound 2, the packing diagram displays a corrugated layer structure, with the sulphate ions and the water molecules located between the layers. Receptor L~2 crystallises with perchlorate from the acid mixture HClO_4, H_2SO_4 and HCl.
机译:柔性双(吡啶基氨基甲酸酯)受体,3-吡啶基-氨基甲酸-氧-氧化1,2-乙二酯(L〜2)和双质子化配体的阴离子配合物([-1 -3)([L〜2H_2]〜(2 +))带有ClO_4〜-,SO_4〜(2-)和Cl〜-。通过X射线单晶衍射建立了[L〜2H_2]〜(2+)与1-3个固态阴离子的结合方式。化合物1和3具有有趣的阴离子聚合物特征。在化合物1中,两条之字形高氯酸盐-水链被封装在由2 + 2(2 [L〜2H_2]〜(2+)+ 2ClO_4〜-)氢键大环构成的一维通道中,而在3中,氯离子为捕获在由两个U形配体形成的氢键1D通道壁上。对于化合物2,堆积图显示了波纹层结构,其中硫酸根离子和水分子位于层之间。受体L〜2与高氯酸盐从HClO_4,H_2SO_4和HCl的酸性混合物中结晶。

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