Methyl(vinyl)dichlorosilane reacts with DMSO in the presence of hexamethyldisiloxane to give the corresponding linear oligosiloxanes of the general formula Me3Si(OSiMeVin)(n)OSiMe3 (n = 1-6) as well as MeSi(OSiMe3)(3) and Me3Si(MeOSiVin)(m)OSi(OSiMe3)(Me)OSiMe3 (m = 1-2). The same reaction in the presence of chlorotrimethylsilane results in oligomers of the general formula Me3Si(OSiMeVin)(n)Cl (n = 1-3). A possible scheme of their formation is discussed.
On the synthesis of siloxanes. XXIV. Nucleophilic substitution reactions of 2-functional 1,3-dioxa-2-4,7-trisilacylcloheptanes and 1,3-dioxa-2,4,8-trisilacyclooctanes
作者:K. R�hlmann、S. J�hnichen、U. Scheim、D. Scheller
DOI:10.1007/bf01169967
日期:——
On the synthesis of siloxanes. XXIII. Synthesis and spectroscopic characterization of 2-functional 1,3-dioxa-2,4,7-trisilacycloheptanes
2-functional 1,3-dioxa-2,4,7-trisilacycloheptanes was synthesized and characterized by means of 29Si NMR spectroscopy, gaschromatography, high performance liquid chromatography and gas chromatography-mass spectrometry. The signals were assigned to the various configurational isomers. This assignment was confirmed by independent synthesis of individual isomers. The sequence of the NMR signals of the all-cis
合成了一系列2-官能的1,3-二氧杂-2,4,7-三硅杂环庚烷,并通过29 Si NMR,气相色谱,高效液相色谱和气相色谱-质谱联用对其进行了表征。信号被分配给各种构型异构体。通过个别异构体的独立合成证实了这种归属。发现确定立体化学所需的顺式和反式异构体的NMR信号顺序与相应的环三硅氧烷的顺序相同。
Generation and capture of methyl(vinyl)silanone
作者:S. V. Basenko、I. A. Gebel、M. G. Voronkov、L. V. Klyba、R. G. Mirskov
DOI:10.1007/bf02495612
日期:1998.8
Methyl(vinyl)dichlorosilane reacts with DMSO in the presence of hexamethyldisiloxane to give the corresponding linear oligosiloxanes of the general formula Me3Si(OSiMeVin)(n)OSiMe3 (n = 1-6) as well as MeSi(OSiMe3)(3) and Me3Si(MeOSiVin)(m)OSi(OSiMe3)(Me)OSiMe3 (m = 1-2). The same reaction in the presence of chlorotrimethylsilane results in oligomers of the general formula Me3Si(OSiMeVin)(n)Cl (n = 1-3). A possible scheme of their formation is discussed.