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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >At the edge of stability - Preparation of methyl-substituted arylsilanetriols and investigation of their condensation behavior
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At the edge of stability - Preparation of methyl-substituted arylsilanetriols and investigation of their condensation behavior

机译：稳定的边缘-甲基取代的芳基硅烷三醇的制备及其缩合行为的研究

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摘要

A series of arylsilanetriols [Aryl-Si(OH)_3, Aryl = 2,6-dimethylphenyl, 2,4,6-trimethylphenyl 2,3,5,6-tetramethylphenyl] with two, three, and four methyl groups at the phenyl ring was prepared from the corresponding trichlorosilanes. While the durene substituted silanetriol was formed exclusively, the other silanetriols were obtained together with their primary condensation products in a constant ratio 4:1. For the mesityl-substituted derivative an alternative synthetic access via the trialkoxysilane was explored, which turned out to be inferior in terms of product yield. Despite their increased steric size the methylated phenylsilanetriols are prone to condensation in solution as well in the solid state, although the dimerization rate is reduced compared to the unsubstituted phenylsilanetriol. All compounds were characterized with ~(29)Si, ~1H, ~(13)C NMR, HRMS elemental analysis, IR spectroscopy, and in some cases single X-ray crystallography.
机译：一系列芳基硅烷三醇[Aryl-Si（OH）_3，Aryl = 2,6-二甲基苯基，2,4,6-三甲基苯基2,3,5,6-四甲基苯基]在苯基上具有两个，三个和四个甲基由相应的三氯硅烷制备环。虽然仅形成了丁二烯取代的硅烷三醇，但以恒定的4：1比例获得了其他硅烷三醇及其一级缩合产物。对于异丁基取代的衍生物，研究了通过三烷氧基硅烷的另一种合成途径，结果证明产物收率较差。尽管它们的空间尺寸增加，但是甲基化的苯基硅烷三醇在溶液中以及在固态下都易于缩合，尽管与未取代的苯基硅烷三醇相比，二聚化速率降低了。所有化合物均通过〜（29）Si，〜1H，〜（13）C NMR，HRMS元素分析，IR光谱以及某些情况下的单X射线晶体学表征。

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