摘要
由α,ω-二氯代全甲基多硅烷与多种格氏试剂作用合成了18种对称和非对称α,ω-二烃基取代全甲基多硅烷,对其中部分化合物的IR、UV及MS谱特性与其结构的关系进行了讨论。
Eighteen sym- and unsym-a,w-dihydrocarbyl substituted permethylpoly-silane were synthesized by means of the reaction of a, w-dichloropermethylpolysi-lane and the corresponding Grignard reagents. The IR spectral data showed that the C=CH2 out-of-plane bending bands of vinyl substituted compounds are - 13cm-1 larger than that of the corresponding allylic compounds, it may be interpreted by the dsi-π effect. The UV spectral bathochromic shift of vinyl substituted permeth-ylpolysilane is greater than that of the corresponding allylic compounds,it is due to the σsi-si-π* conjugative effect. The rearranged fragments of ArRMeSi++. appeared in the MS spectra of some of these compounds.The peaks of ArRMe2Si++. are the base peaks.It showed that the stability of Ar-Si bonds has been enhanced by the dis-π effect.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1989年第1期51-55,共5页
Chemical Journal of Chinese Universities
基金
中国科学院科学基金
关键词
全甲基多硅烷
二烃基
合成
a, w-Dihydrocarbyl substituted permethylpolysilanes, dsl-π effect, σsi-si-π conjungative effect, Bathochromic shift
