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不同结构的硅酸三甲基硅酯,可以采用它们的气相色谱保留指数及保留温度来表徵。结果表明,酯的保留数据,在颇大程度上取决于分子中三甲基硅基的数目,而硅酸骨架结构的影响甚微。本文记录了不同结构的九个硅酸三甲基硅酯的~(29)Si-核磁共振谱,讨论了信号与各个酯的组成基团的隶属关系。基于上述结果,研究了六聚硅酸三甲基硅酯的结构,鉴定了两个双环六硅酸酯((CH_3)_3Si]_(10)[Si_6O_(17)]的同分异构体。
Different structures of trimethylsilyl silicate can be characterized by their GC retention index and retention temperature. The results show that the ester retention data, to a large extent, depend on the number of trimethylsilyl groups in the molecule, with little effect of the silicic acid backbone structure. This paper records the ~ (29) Si-NMR spectra of nine different trimethylsilyl silicates of different structures and discusses the membership of the signal to the constituent groups of each ester. Based on the above results, the structure of trimethylhexasiloxane was studied and the isomers of two bicyclic hexasilicates ((CH_3) _3Si] _ (10) [Si_6O_ (17)] were identified.