Infrared spectroscopic study of very low pressure pyrolysis products of cyclosilthianes and 3,3-dimethyl-3-silathietane isolated in argon matrices. A new source of 1,1-dimethyl-1-silaethylene (Me2siCH2), thioformaldehyde (H2CS) and dimethylsilanthione (Me2SiS)
作者:L.E. Gusel'nikov、V.V. Volkova、V.G. Avakyan、N.S. Nametkin、M.G. Voronkov、S.V. Kirpichenko、E.N. Suslova
DOI:10.1016/s0022-328x(00)99104-6
日期:1983.9
The products of very low pressure pyrolysis (VLPP) of hexamethylcyclotri-silthiane (I), tetramethylcyclodisilthiane (II) and 3,3-dimethyl-3-silathietane (III) were isolated in Ar matrices and were studied by IR spectroscopy. The only pyrolysis product of I was cyclosilthiane II, a dimer of transient dimethylsilanthione (Me2SiS) (IV). The starting material was recovered on pyrolysis of II. Thermal decomposition
六甲基环三甲硅烷基(I),四甲基环二甲硅烷基(II)和3,3-二甲基-3-甲硅烷基(III)的超低压热解(VLPP)产物在Ar基质中分离,并通过红外光谱进行了研究。的我的唯一的热解产物是cyclosilthiane II,瞬时dimethylsilanthione的二聚体(ME 2个SiS)(IV)。通过II的热解回收原料。III的热分解包括三个中间的不饱和化合物:dimethylsilaethylene(ME 2 SiCH 2)(V)和硫甲醛(H 2CS)(VI),都在10 K的Ar基质中分离,以及以环状二聚体II形式固定在基质中的Silanthione IV。在研究中间体V和VI的真实来源1,1-二甲基-1-硅环丁烷和硫杂环丁烷的裂解过程中也观察到了后者。获得了在Ar矩阵中分离的起始化合物I,II和III的红外光谱。IV的理论结构和力常数F(SiS)通过CNDO / 2方法确定。关于CNDO