Synthese, Kernresonanzspektren und Schwingungsspektren der Hexamethyltrisilane und Pentamethyltrisilane (XMe2Si)2SiMe2 und (XMe2Si)2SiMeX (XH, F, Cl, Br, I, Ph, OMe)
摘要:
The syntheses, IR, Raman and Si-29 spectra of the title compounds are reported. SiSi force constants, calculated with the aid of normal coordinate analyses, are compared with Si-29 Si-29 coupling constants.
Synthese, Kernresonanzspektren und Schwingungsspektren der Hexamethyltrisilane und Pentamethyltrisilane (XMe2Si)2SiMe2 und (XMe2Si)2SiMeX (XH, F, Cl, Br, I, Ph, OMe)
摘要:
The syntheses, IR, Raman and Si-29 spectra of the title compounds are reported. SiSi force constants, calculated with the aid of normal coordinate analyses, are compared with Si-29 Si-29 coupling constants.
Synthesis of hydrocarbon-soluble, methyl-substituted highly branched polysilanes via the Wurtz-type reductive coupling of trifunctional trisilanes and their pyrolysis to silicon carbide
作者:K. Deller、B. Rieger
DOI:10.1039/c5ra19266h
日期:——
precipitation in MeOH. The branched polysilane was analyzed by GPC, NMR and IR spectroscopy after quenching with MeMgBr and additionally after precipitation in MeOH. Opto-electronic properties were tested by UV/Vis and PL spectroscopy. Thermal properties were examined via TGA and DSC. The synthesized polysilane is usable as a soluble precursor for the preparation of SiC, not least due to its high silicon
通过使新型单体经受普通的Wurtz型还原偶联反应条件,合成了烃可溶的,甲基取代的高度支化的聚硅烷。为此目的,使用三氯取代的三硅烷(ClMe 2 Si)2 SiMeCl(1)作为单体。使用分散在甲苯中的钠在较高的温度下进行聚合。4小时后,通过添加MeMgBr终止反应,并在MeOH中沉淀。用MeMgBr淬灭后,另外在MeOH中沉淀后,通过GPC,NMR和IR光谱分析支化的聚硅烷。通过UV / Vis和PL光谱法测试光电性能。通过检查热性能TGA和DSC。合成的聚硅烷可用作制备SiC的可溶性前体,这不仅是由于其高硅含量。通过1 H NMR,IR和UV / Vis光谱在不同温度下检查热解过程中的化学过程。XRPD分析,红外光谱,HR-SEM-EDS和元素分析证实了β-SiC的成功形成。
Syntheses, Raman and infrared vibrational spectra, normal coordinate analyses and 29Si-NMR-spectra of halogenated trisilanes MenSi3X8−n and (HmX3−mSi)2SiMe2 (X = F, Cl, Br, I)
作者:K. Schenzel、K. Hassler
DOI:10.1016/0022-2860(95)08734-d
日期:1995.4
Synthese, Kernresonanzspektren und Schwingungsspektren der Hexamethyltrisilane und Pentamethyltrisilane (XMe2Si)2SiMe2 und (XMe2Si)2SiMeX (XH, F, Cl, Br, I, Ph, OMe)
作者:Karla Schenzel、Karl Hassler
DOI:10.1016/0584-8539(94)80120-7
日期:1994.1
The syntheses, IR, Raman and Si-29 spectra of the title compounds are reported. SiSi force constants, calculated with the aid of normal coordinate analyses, are compared with Si-29 Si-29 coupling constants.