Dimer formation upon deprotonation: synthesis and structure of a m-terphenyl substituted (R,S)-dilithium disiloxanolate disilanol.
Dimer formation upon deprotonation: synthesis and structure of a m-terphenyl substituted (R,S)-dilithium disiloxanolate disilanol.
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去质子化时形成二聚体：间三联苯取代的（R，S）-二硅氧醇二硅醇二锂的合成和结构。
DOI：
10.1039/c5dt01992c
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发表时间：
2015
影响因子：
4
通讯作者：
R. Pietschnig
中科院分区：
文献类型：
--
作者：
Daniel Čas;N. Hurkes;S. Spirk;F. Belaj;C. Bruhn;G. Rechberger;R. Pietschnig
本文报道了第一种四羟基二硅氧烷二锂盐[DmpSi（OH）OLi]_2O（6）的合成和结构表征。固态结构揭示了二聚基序的存在，其中两个二硅氧烷单元通过配位锂原子连接，这与钠和钾类似物中发现的不同。由簇形成施加的排列导致非对映体硅原子在固态下表现出（R，S）构型。此外，反应的中间体，单锂化和双锂化的硅烷三醇可以通过高分辨质谱鉴定和6的形成进行了讨论。此外，还得到了完全质子化的四羟基二硅氧烷[DmpSi（OH）2]2O，并对其固态结构进行了研究。
The synthesis and structural characterization of the first dilithium salt of a tetrahydroxydisiloxane, [DmpSi(OH)OLi]2O (6), is described (Dmp = 2,6-dimesitylphenyl). The solid state structure reveals the presence of a dimeric motif where two disiloxane units are linked by coordinating lithium atoms which differs from those found for the sodium and potassium analogs. The arrangement imposed by the cluster formation leads to diastereomeric silicon atoms exhibiting (R,S) configuration in the solid state. In addition, the intermediates of the reaction, monolithiated and dilithiated silanetriol could be identified by means of high-resolution mass spectrometry and the formation of 6 is discussed. Moreover, the fully protonated tetrahydroxydisiloxane, [DmpSi(OH)2]2O has been obtained as well and its solid state structures with varying hydrogen bond acceptors have been surveyed.