首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Cesium and tetrabutylammonium salt of the ethynyl-closo-dodecaborate dianion
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Cesium and tetrabutylammonium salt of the ethynyl-closo-dodecaborate dianion

机译:乙炔基-十-十二硼酸二乙酯的铯盐和四丁基铵盐

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摘要

Salts of the ethynyl-closo-dodecaborate dianion [HC≡C-closo-B _(12)H _(11)] ~(2-) (1) were synthesized by a microwave-assisted palladium-catalyzed cross-coupling reaction starting from the iodinated cluster [I-closo-B _(12)H _(11)] ~(2-) and Me _3SiC≡CMgBr. The dianion was characterized in its [nBu _4N] ~+ and Cs ~+ salt by multi-NMR and vibrational spectroscopy as well as by (-)-MALDI mass spectrometry. A crystal of [nBu _4N] _2[HC≡C-closo-B _(12)H _(11)] was studied by X-ray diffraction. The experimental bond properties and the spectroscopic data are compared to values derived from density functional and (RI)-MP2 calculations. The charge distribution in the ethynyl substituents of the isoelectronic boron clusters 1, [12-HC≡C-closo-1-CB _(11)H _(11)] ~-,and 9-HC≡C-closo-1, 2-CB _(11)H _(11) is compared. Furthermore, the crystal structure of the [nBu _4N] ~+ salt of the intermediate[Me 3SiC≡C- closo-B _(12)H _(11)] ~(2-) (2) is described.
机译:通过微波辅助钯催化的交叉偶联反应,合成乙炔基-十-十二硼酸二阴离子[HC≡C-closo-B_(12)H _(11)]〜(2-)(1)的盐来自碘化簇[I-closo-B _(12)H _(11)]〜(2-)和Me_3SiC≡CMgBr。通过多核磁共振和振动光谱以及(-)-MALDI质谱,对二价阴离子的[nBu _4N] +和Cs〜+盐进行了表征。通过X射线衍射研究了[nBu _4N] _2 [HC≡C-closo-B_(12)H _(11)]的晶体。将实验键的性质和光谱数据与从密度泛函和(RI)-MP2计算得出的值进行比较。等电子硼簇1 [[12-HC≡C-closo-1-CB_(11)H _(11)]〜和9-HC≡C-closo-1的乙炔基取代基中的电荷分布,比较2-CB _(11)H _(11)。此外,描述了中间体[Me3SiC≡C-closo-B_(12)H _(11)]〜(2-)(2)的[nBu _4N]〜+盐的晶体结构。

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