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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >A structural study of alkaline earth metal complexes with hybrid disila-crown ethers
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A structural study of alkaline earth metal complexes with hybrid disila-crown ethers

机译:碱土金属配合物与杂交性杂交冠醚的结构研究

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Compounds consisting of [M(1,2-disila-[3n]crown-n)](2+) (M = Mg, Ca, Sr, Ba; n = 5, 6) and [Ba(1,2-disilabenzo[ 18]crown-6)](2+) cations and different anions were obtained by equimolar reaction of the hybrid disila-crown ethers 1,2-disila[15]crown-5 (1), 1,2-disila[18]crown-6 (2) and 1,2-disila-benzo[18]crown-6 (7) with alkaline earth metal salts. Even with strongly coordinating anions such as Br- or I- stable complexes could be obtained, showing the good coordination ability of these ligands. The structures of all coordination compounds were determined via single crystal X-ray diffraction (XRD). By means of DFT calculations, the complexation ability of 1,2-disila[15]crown-5 (1) towards magnesium bromide was determined to be considerably higher compared to [15]crown-5. The opposite case was observed in solution as the exchange of calcium cations between [18]crown-6 and 1,2-disila[18]crown-6 (2) was studied via dynamic proton nuclear magnetic resonance (NMR) spectroscopy.
机译:由[M(1,2-型 - [3N]冠-N)组成的化合物](2+)(M = Mg,Ca,Sr,Ba; n = 5,6)和[Ba(1,2-二硅脂蛋白 通过杂合性Disila-Crown醚的等摩尔反应1,2-二维冠-5(1),1,2-二维反应获得[18]官冠-6)和不同的阴离子获得了阳离子和不同的阴离子[15] 冠-6(2)和1,2-二维苯并[18]冠-6(7),含碱土金属盐。 即使可以获得诸如BR-或I-稳定复合物的强烈配位阴离子,显示出这些配体的良好配位能力。 通过单晶X射线衍射(XRD)测定所有配位化合物的结构。 通过DFT计算,与[15]冠-5相比,测定1,2-二维[15]冠-5(1)朝向溴化镁的溴化镁的络合能力。 通过通过动态质子核磁共振(NMR)光谱研究[18]冠-6和1,2-二维[18]冠-6(2)之间的钙阳离子的溶液中溶液中观察到相反的情况。

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